chore: release 0.15.2

Prefer DynamicMemberLookup over KVC

.github/workflows/danger.yml

@@ -2,7 +2,8 @@ name: Danger
 
 on:
   push:
-    branches: master
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -10,10 +11,10 @@ jobs:
     name: Danger Check
     runs-on: ubuntu-latest
     steps:
-      - 
+      -
         name: Checkout
         uses: actions/checkout@v3
-      - 
+      -
         name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/lint-cocoapods.yml

@@ -2,7 +2,8 @@ name: Lint Cocoapods
 
 on:
   push:
-    branches: master
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -10,10 +11,10 @@ jobs:
     name: Pod Lint
     runs-on: ubuntu-latest
     steps:
-      - 
+      -
         name: Checkout
         uses: actions/checkout@v3
-      - 
+      -
         name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/swiftlint.yml

@@ -2,7 +2,8 @@ name: SwiftLint
 
 on:
   push:
-    branches: master
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -10,10 +11,10 @@ jobs:
     name: SwiftLint
     runs-on: macos-latest
     steps:
-      - 
+      -
         name: Checkout
         uses: actions/checkout@v3
-      - 
+      -
         name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:

.github/workflows/tag-publish.yml

@@ -7,24 +7,6 @@ on:
   workflow_dispatch:
 
 jobs:
-  cocoapods:
-    name: Push To CocoaPods
-    runs-on: ubuntu-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v3
-      -
-        name: Set up Ruby
-        uses: ruby/setup-ruby@v1
-        with:
-          bundler-cache: true
-      -
-        name: Push to CocoaPods
-        run: bundle exec rake release:cocoapods
-        env:
-          COCOAPODS_TRUNK_TOKEN: ${{secrets.COCOAPODS_TRUNK_TOKEN}}
-
   github:
     name: GitHub Release
     runs-on: ubuntu-latest

.github/workflows/test-spm.yml

@@ -2,7 +2,8 @@ name: Test SPM
 
 on:
   push:
-    branches: master
+    branches:
+      - main
   pull_request:
 
 jobs:
@@ -11,10 +12,10 @@ jobs:
     runs-on: ubuntu-latest
     container: swiftgen/swift:5.6
     steps:
-      - 
+      -
         name: Checkout
         uses: actions/checkout@v3
-      - 
+      -
         # Note: we can't use `ruby/setup-ruby` on custom docker images, so we
         # have to do our own caching
         name: Cache gems
@@ -24,7 +25,7 @@ jobs:
           key: ${{ runner.os }}-gems-${{ hashFiles('Gemfile.lock') }}
           restore-keys: |
             ${{ runner.os }}-gems-
-      - 
+      -
         name: Cache SPM
         uses: actions/cache@v3
         with:
@@ -45,15 +46,15 @@ jobs:
     name: Test SPM macOS
     runs-on: macos-latest
     steps:
-      - 
+      -
         name: Checkout
         uses: actions/checkout@v3
-      - 
+      -
         name: Setup Ruby
         uses: ruby/setup-ruby@v1
         with:
           bundler-cache: true
-      - 
+      -
         name: Cache SPM
         uses: actions/cache@v3
         with:

.swiftlint.yml

@@ -1,4 +1,4 @@
-swiftlint_version: 0.48.0
+swiftlint_version: 0.61.0
 
 opt_in_rules:
  - accessibility_label_for_image
@@ -104,14 +104,6 @@ closure_body_length:
 conditional_returns_on_newline:
   if_only: true
 
-file_header:
-  required_pattern: |
-                    \/\/
-                    \/\/ Stencil
-                    \/\/ Copyright © 2022 Stencil
-                    \/\/ MIT Licence
-                    \/\/
-
 indentation_width:
   indentation_width: 2
 

CHANGELOG.md

@@ -1,60 +1,78 @@
+## 0.15.2
+
+### Enhancements
+
+- Prefer `DynamicMemberLookup` over KVC.
+  [##342](https://github.com/stencilproject/Stencil/pull/342)
+  [@art-divin](https://github.com/art-divin)
+
+- Allow tokens to be escaped by a backslash, i.e. `\{{ something }}` would render to `{{ something }}`.
+
+## 0.15.1
+
+### Bug Fixes
+
+- Fix bug in `LazyValueWrapper`, causing it to never resolve.
+  [David Jennes](https://github.com/djbe)
+  [#328](https://github.com/stencilproject/Stencil/pull/328)
+
 ## 0.15.0
 
 ### Breaking
 
-- Drop support for Swift < 5. For Swift 4.2 support, you should use Stencil 0.14.2.  
+- Drop support for Swift < 5. For Swift 4.2 support, you should use Stencil 0.14.2.
   [David Jennes](https://github.com/djbe)
   [#323](https://github.com/stencilproject/Stencil/pull/323)
 
 ### Enhancements
 
-- Added support for trimming whitespace around blocks with Jinja2 whitespace control symbols. eg `{%- if value +%}`.  
+- Added support for trimming whitespace around blocks with Jinja2 whitespace control symbols. eg `{%- if value +%}`.
   [Miguel Bejar](https://github.com/bejar37)
   [Yonas Kolb](https://github.com/yonaskolb)
   [#92](https://github.com/stencilproject/Stencil/pull/92)
   [#287](https://github.com/stencilproject/Stencil/pull/287)
-- Added support for adding default whitespace trimming behaviour to an environment.  
+- Added support for adding default whitespace trimming behaviour to an environment.
   [Yonas Kolb](https://github.com/yonaskolb)
   [#287](https://github.com/stencilproject/Stencil/pull/287)
-- Blocks now can be used repeatedly in the template. When block is rendered for the first time its content will be cached and it can be rendered again later using `{{ block.block_name }}`.  
+- Blocks now can be used repeatedly in the template. When block is rendered for the first time its content will be cached and it can be rendered again later using `{{ block.block_name }}`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#158](https://github.com/stencilproject/Stencil/issues/158)
   [#182](https://github.com/stencilproject/Stencil/pull/182)
-- Added `break` and `continue` tags to break or continue current loop.  
+- Added `break` and `continue` tags to break or continue current loop.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#175](https://github.com/stencilproject/Stencil/pull/175)
-- You can now access outer loop's scope by labeling it: `{% outer: for ... %}... {% for ... %} {{ outer.counter }} {% endfor %}{% endfor %}`.  
+- You can now access outer loop's scope by labeling it: `{% outer: for ... %}... {% for ... %} {{ outer.counter }} {% endfor %}{% endfor %}`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#175](https://github.com/stencilproject/Stencil/pull/175)
-- Boolean expressions can now be rendered, i.e `{{ name == "John" }}` will render `true` or `false` depending on the evaluation result.  
+- Boolean expressions can now be rendered, i.e `{{ name == "John" }}` will render `true` or `false` depending on the evaluation result.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [David Jennes](https://github.com/djbe)
   [#164](https://github.com/stencilproject/Stencil/pull/164)
   [#325](https://github.com/stencilproject/Stencil/pull/325)
-- Enable dynamic member lookup using a new `DynamicMemberLookup` marker protocol. Conform your own types to this protocol to support dynamic member from with contexts.  
+- Enable dynamic member lookup using a new `DynamicMemberLookup` marker protocol. Conform your own types to this protocol to support dynamic member from with contexts.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#219](https://github.com/stencilproject/Stencil/issues/219)
   [#246](https://github.com/stencilproject/Stencil/pull/246)
-- Allow providing lazily evaluated context data, using the `LazyValueWrapper` structure.  
+- Allow providing lazily evaluated context data, using the `LazyValueWrapper` structure.
   [David Jennes](https://github.com/djbe)
   [#324](https://github.com/stencilproject/Stencil/pull/324)
 
 ### Bug Fixes
 
-- Fixed using `{{ block.super }}` inside nodes other than `block`.  
+- Fixed using `{{ block.super }}` inside nodes other than `block`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#266](https://github.com/stencilproject/Stencil/issues/266)
   [#267](https://github.com/stencilproject/Stencil/pull/267)
 
 ### Internal Changes
 
-- Updated internal maintenance scripts, and switched to GitHub actions.  
+- Updated internal maintenance scripts, and switched to GitHub actions.
   [David Jennes](https://github.com/djbe)
   [#321](https://github.com/stencilproject/Stencil/pull/321)
-- Made the `tokens` property on a `Template` public.  
+- Made the `tokens` property on a `Template` public.
   [Stefanomondino](https://github.com/stefanomondino)
   [#292](https://github.com/stencilproject/Stencil/pull/292)
-- Made the `Template.render(_:)` method (that accepts a `Context`) public.  
+- Made the `Template.render(_:)` method (that accepts a `Context`) public.
   [David Jennes](https://github.com/djbe)
   [#322](https://github.com/stencilproject/Stencil/pull/322)
 
@@ -62,7 +80,7 @@
 
 ### Internal Changes
 
-- Update Spectre (0.10) and PathKit to support Xcode 13.  
+- Update Spectre (0.10) and PathKit to support Xcode 13.
   [Astromonkee](https://github.com/astromonkee)
   [#314](https://github.com/stencilproject/Stencil/pull/314)
 
@@ -70,7 +88,7 @@
 
 ### Bug Fixes
 
-- Fix for crashing range indexes when variable length is 1.  
+- Fix for crashing range indexes when variable length is 1.
   [Łukasz Kuczborski](https://github.com/lkuczborski)
   [#306](https://github.com/stencilproject/Stencil/pull/306)
 
@@ -79,35 +97,35 @@
 
 ### Breaking
 
-- Drop support for Swift < 4.2. For Swift 4 support, you should use Stencil 0.13.1.  
+- Drop support for Swift < 4.2. For Swift 4 support, you should use Stencil 0.13.1.
   [David Jennes](https://github.com/djbe)
   [#294](https://github.com/stencilproject/Stencil/pull/294)
 
 ### Enhancements
 
 - Added support for dynamic filter using `filter` filter. With that you can define a variable with a name of filter
-, i.e. `myfilter = "uppercase"` and then use it to invoke this filter with `{{ string|filter:myfilter }}`.  
+, i.e. `myfilter = "uppercase"` and then use it to invoke this filter with `{{ string|filter:myfilter }}`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#203](https://github.com/stencilproject/Stencil/pull/203)
 
 ### Bug Fixes
 
-- Fixed using parenthesis in boolean expressions, they now can be used without spaces around them.  
+- Fixed using parenthesis in boolean expressions, they now can be used without spaces around them.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#254](https://github.com/stencilproject/Stencil/pull/254)
-- Throw syntax error on empty variable tags (`{{ }}`) instead `fatalError`.  
+- Throw syntax error on empty variable tags (`{{ }}`) instead `fatalError`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#263](https://github.com/stencilproject/Stencil/pull/263)
 
 ### Internal Changes
 
-- `Token` type converted to struct to allow computing token components only once.  
+- `Token` type converted to struct to allow computing token components only once.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#256](https://github.com/stencilproject/Stencil/pull/256)
-- Added SwiftLint to the project.  
+- Added SwiftLint to the project.
   [David Jennes](https://github.com/djbe)
   [#249](https://github.com/stencilproject/Stencil/pull/249)
-- Updated to Swift 5.  
+- Updated to Swift 5.
   [Jungwon An](https://github.com/kawoou)
   [#268](https://github.com/stencilproject/Stencil/pull/268)
 
@@ -116,7 +134,7 @@
 
 ### Bug Fixes
 
-- Fixed a bug in Stencil 0.13 where tags without spaces were incorrectly parsed.  
+- Fixed a bug in Stencil 0.13 where tags without spaces were incorrectly parsed.
   [David Jennes](https://github.com/djbe)
   [#252](https://github.com/stencilproject/Stencil/pull/252)
 
@@ -125,46 +143,46 @@
 
 ### Breaking
 
-- Now requires Swift 4.1 or newer.  
+- Now requires Swift 4.1 or newer.
   [Yonas Kolb](https://github.com/yonaskolb)
   [#228](https://github.com/stencilproject/Stencil/pull/228)
 
 ### Enhancements
 
-- You can now use parentheses in boolean expressions to change operator precedence.  
+- You can now use parentheses in boolean expressions to change operator precedence.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#165](https://github.com/stencilproject/Stencil/pull/165)
-- Added method to add boolean filters with their negative counterparts.  
+- Added method to add boolean filters with their negative counterparts.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#160](https://github.com/stencilproject/Stencil/pull/160)
-- Now you can conditionally render variables with `{{ variable if condition }}`, which is a shorthand for `{% if condition %}{{ variable }}{% endif %}`. You can also use `else` like `{{ variable1 if condition else variable2 }}`, which is a shorthand for `{% if condition %}{{ variable1 }}{% else %}{{ variable2 }}{% endif %}`  
+- Now you can conditionally render variables with `{{ variable if condition }}`, which is a shorthand for `{% if condition %}{{ variable }}{% endif %}`. You can also use `else` like `{{ variable1 if condition else variable2 }}`, which is a shorthand for `{% if condition %}{{ variable1 }}{% else %}{{ variable2 }}{% endif %}`
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#243](https://github.com/stencilproject/Stencil/pull/243)
-- Now you can access string characters by index or get string length the same was as if it was an array, i.e. `{{ 'string'.first }}`, `{{ 'string'.last }}`, `{{ 'string'.1 }}`, `{{ 'string'.count }}`.  
+- Now you can access string characters by index or get string length the same was as if it was an array, i.e. `{{ 'string'.first }}`, `{{ 'string'.last }}`, `{{ 'string'.1 }}`, `{{ 'string'.count }}`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#245](https://github.com/stencilproject/Stencil/pull/245)
 
 ### Bug Fixes
 
-- Fixed the performance issues introduced in Stencil 0.12 with the error log improvements.  
+- Fixed the performance issues introduced in Stencil 0.12 with the error log improvements.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#230](https://github.com/stencilproject/Stencil/pull/230)
-- Now accessing undefined keys in NSObject does not cause runtime crash and instead renders empty string.  
+- Now accessing undefined keys in NSObject does not cause runtime crash and instead renders empty string.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#234](https://github.com/stencilproject/Stencil/pull/234)
-- `for` tag: When iterating over a dictionary the keys will now always be sorted (in an ascending order) to ensure consistent output generation.  
+- `for` tag: When iterating over a dictionary the keys will now always be sorted (in an ascending order) to ensure consistent output generation.
   [David Jennes](https://github.com/djbe)
   [#240](https://github.com/stencilproject/Stencil/pull/240)
 
 ### Internal Changes
 
-- Updated the codebase to use Swift 4 features.  
+- Updated the codebase to use Swift 4 features.
   [David Jennes](https://github.com/djbe)
   [#239](https://github.com/stencilproject/Stencil/pull/239)
-- Update to Spectre 0.9.0.  
+- Update to Spectre 0.9.0.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#247](https://github.com/stencilproject/Stencil/pull/247)
-- Optimise Scanner performance.  
+- Optimise Scanner performance.
   [Eric Thorpe](https://github.com/trametheka)
   [Sébastien Duperron](https://github.com/Liquidsoul)
   [David Jennes](https://github.com/djbe)
@@ -175,7 +193,7 @@
 
 ### Internal Changes
 
-- Updated the PathKit dependency to 0.9.0 in CocoaPods, to be in line with SPM.  
+- Updated the PathKit dependency to 0.9.0 in CocoaPods, to be in line with SPM.
   [David Jennes](https://github.com/djbe)
   [#227](https://github.com/stencilproject/Stencil/pull/227)
 
@@ -184,23 +202,23 @@
 
 ### Enhancements
 
-- Added an optional second parameter to the `include` tag for passing a sub context to the included file.  
+- Added an optional second parameter to the `include` tag for passing a sub context to the included file.
   [Yonas Kolb](https://github.com/yonaskolb)
   [#214](https://github.com/stencilproject/Stencil/pull/214)
 - Variables now support the subscript notation. For example, if you have a variable `key = "name"`, and an
-  object `item = ["name": "John"]`, then `{{ item[key] }}` will evaluate to "John".  
+  object `item = ["name": "John"]`, then `{{ item[key] }}` will evaluate to "John".
   [David Jennes](https://github.com/djbe)
   [#215](https://github.com/stencilproject/Stencil/pull/215)
-- Adds support for using spaces in filter expression.  
+- Adds support for using spaces in filter expression.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#178](https://github.com/stencilproject/Stencil/pull/178)
-- Improvements in error reporting.  
+- Improvements in error reporting.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#167](https://github.com/stencilproject/Stencil/pull/167)
 
 ### Bug Fixes
 
-- Fixed using quote as a filter parameter.  
+- Fixed using quote as a filter parameter.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#210](https://github.com/stencilproject/Stencil/pull/210)
 
@@ -209,62 +227,62 @@
 
 ### Enhancements
 
-- Added support for resolving superclass properties for not-NSObject subclasses.  
+- Added support for resolving superclass properties for not-NSObject subclasses.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#152](https://github.com/stencilproject/Stencil/pull/152)
 - The `{% for %}` tag can now iterate over tuples, structures and classes via
-  their stored properties.  
+  their stored properties.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#173](https://github.com/stencilproject/Stencil/pull/173)
-- Added `split` filter.  
+- Added `split` filter.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#187](https://github.com/stencilproject/Stencil/pull/187)
-- Allow default string filters to be applied to arrays.  
+- Allow default string filters to be applied to arrays.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#190](https://github.com/stencilproject/Stencil/pull/190)
-- Similar filters are suggested when unknown filter is used.  
+- Similar filters are suggested when unknown filter is used.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#186](https://github.com/stencilproject/Stencil/pull/186)
-- Added `indent` filter.  
+- Added `indent` filter.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#188](https://github.com/stencilproject/Stencil/pull/188)
-- Allow using new lines inside tags.  
+- Allow using new lines inside tags.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#202](https://github.com/stencilproject/Stencil/pull/202)
-- Added support for iterating arrays of tuples.  
+- Added support for iterating arrays of tuples.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#177](https://github.com/stencilproject/Stencil/pull/177)
-- Added support for ranges in if-in expression.  
+- Added support for ranges in if-in expression.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#193](https://github.com/stencilproject/Stencil/pull/193)
-- Added property `forloop.length` to get number of items in the loop.  
+- Added property `forloop.length` to get number of items in the loop.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#171](https://github.com/stencilproject/Stencil/pull/171)
-- Now you can construct ranges for loops using `a...b` syntax, i.e. `for i in 1...array.count`.  
+- Now you can construct ranges for loops using `a...b` syntax, i.e. `for i in 1...array.count`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#192](https://github.com/stencilproject/Stencil/pull/192)
 
 ### Bug Fixes
 
-- Fixed rendering `{{ block.super }}` with several levels of inheritance.  
+- Fixed rendering `{{ block.super }}` with several levels of inheritance.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#154](https://github.com/stencilproject/Stencil/pull/154)
-- Fixed checking dictionary values for nil in `default` filter.  
+- Fixed checking dictionary values for nil in `default` filter.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#162](https://github.com/stencilproject/Stencil/pull/162)
-- Fixed comparing string variables with string literals, in Swift 4 string literals became `Substring` and thus couldn't be directly compared to strings.  
+- Fixed comparing string variables with string literals, in Swift 4 string literals became `Substring` and thus couldn't be directly compared to strings.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#168](https://github.com/stencilproject/Stencil/pull/168)
-- Integer literals now resolve into Int values, not Float.  
+- Integer literals now resolve into Int values, not Float.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#181](https://github.com/stencilproject/Stencil/pull/181)
-- Fixed accessing properties of optional properties via reflection.  
+- Fixed accessing properties of optional properties via reflection.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#204](https://github.com/stencilproject/Stencil/pull/204)
-- No longer render optional values in arrays as `Optional(..)`.  
+- No longer render optional values in arrays as `Optional(..)`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#205](https://github.com/stencilproject/Stencil/pull/205)
-- Fixed subscription tuples by value index, i.e. `{{ tuple.0 }}`.  
+- Fixed subscription tuples by value index, i.e. `{{ tuple.0 }}`.
   [Ilya Puchka](https://github.com/ilyapuchka)
   [#172](https://github.com/stencilproject/Stencil/pull/172)
 
@@ -467,10 +485,10 @@
 ### Bug Fixes
 
 - Variables (`{{ variable.5 }}`) that reference an array index at an unknown
-  index will now resolve to `nil` instead of causing a crash.  
+  index will now resolve to `nil` instead of causing a crash.
   [#72](https://github.com/stencilproject/Stencil/issues/72)
 
-- Templates can now extend templates that extend other templates.  
+- Templates can now extend templates that extend other templates.
   [#60](https://github.com/stencilproject/Stencil/issues/60)
 
 - If comparisons will now treat 0 and below numbers as negative.

Gemfile

@@ -4,13 +4,13 @@ source 'https://rubygems.org'
 
 # The bare minimum for building, e.g. in Homebrew
 group :build do
+	gem 'base64', '~> 0.3'
   gem 'rake', '~> 13.0'
   gem 'xcpretty', '~> 0.3'
 end
 
 # In addition to :build, for contributing
 group :development do
-  gem 'cocoapods', '~> 1.11'
   gem 'danger', '~> 8.4'
   gem 'rubocop', '~> 1.22'
 end

Gemfile.lock

@@ -1,65 +1,16 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    CFPropertyList (3.0.5)
-      rexml
-    activesupport (6.1.6.1)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 1.6, < 2)
-      minitest (>= 5.1)
-      tzinfo (~> 2.0)
-      zeitwerk (~> 2.3)
-    addressable (2.8.0)
-      public_suffix (>= 2.0.2, < 5.0)
-    algoliasearch (1.27.5)
-      httpclient (~> 2.8, >= 2.8.3)
-      json (>= 1.5.1)
-    ast (2.4.2)
-    atomos (0.1.3)
+    addressable (2.8.7)
+      public_suffix (>= 2.0.2, < 7.0)
+    ast (2.4.3)
+    base64 (0.3.0)
     claide (1.1.0)
     claide-plugins (0.9.2)
       cork
       nap
       open4 (~> 1.3)
-    cocoapods (1.11.3)
-      addressable (~> 2.8)
-      claide (>= 1.0.2, < 2.0)
-      cocoapods-core (= 1.11.3)
-      cocoapods-deintegrate (>= 1.0.3, < 2.0)
-      cocoapods-downloader (>= 1.4.0, < 2.0)
-      cocoapods-plugins (>= 1.0.0, < 2.0)
-      cocoapods-search (>= 1.0.0, < 2.0)
-      cocoapods-trunk (>= 1.4.0, < 2.0)
-      cocoapods-try (>= 1.1.0, < 2.0)
-      colored2 (~> 3.1)
-      escape (~> 0.0.4)
-      fourflusher (>= 2.3.0, < 3.0)
-      gh_inspector (~> 1.0)
-      molinillo (~> 0.8.0)
-      nap (~> 1.0)
-      ruby-macho (>= 1.0, < 3.0)
-      xcodeproj (>= 1.21.0, < 2.0)
-    cocoapods-core (1.11.3)
-      activesupport (>= 5.0, < 7)
-      addressable (~> 2.8)
-      algoliasearch (~> 1.0)
-      concurrent-ruby (~> 1.1)
-      fuzzy_match (~> 2.0.4)
-      nap (~> 1.0)
-      netrc (~> 0.11)
-      public_suffix (~> 4.0)
-      typhoeus (~> 1.0)
-    cocoapods-deintegrate (1.0.5)
-    cocoapods-downloader (1.6.3)
-    cocoapods-plugins (1.0.0)
-      nap
-    cocoapods-search (1.0.1)
-    cocoapods-trunk (1.6.0)
-      nap (>= 0.8, < 2.0)
-      netrc (~> 0.11)
-    cocoapods-try (1.2.0)
     colored2 (3.1.2)
-    concurrent-ruby (1.1.10)
     cork (0.3.0)
       colored2 (~> 3.1)
     danger (8.6.1)
@@ -75,10 +26,7 @@ GEM
       no_proxy_fix
       octokit (~> 4.7)
       terminal-table (>= 1, < 4)
-    escape (0.0.4)
-    ethon (0.15.0)
-      ffi (>= 1.15.0)
-    faraday (1.10.0)
+    faraday (1.10.4)
       faraday-em_http (~> 1.0)
       faraday-em_synchrony (~> 1.0)
       faraday-excon (~> 1.1)
@@ -91,94 +39,89 @@ GEM
       faraday-retry (~> 1.0)
       ruby2_keywords (>= 0.0.4)
     faraday-em_http (1.0.0)
-    faraday-em_synchrony (1.0.0)
+    faraday-em_synchrony (1.0.1)
     faraday-excon (1.1.0)
-    faraday-http-cache (2.4.0)
+    faraday-http-cache (2.5.1)
       faraday (>= 0.8)
     faraday-httpclient (1.0.1)
-    faraday-multipart (1.0.4)
-      multipart-post (~> 2)
-    faraday-net_http (1.0.1)
+    faraday-multipart (1.1.1)
+      multipart-post (~> 2.0)
+    faraday-net_http (1.0.2)
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
     faraday-retry (1.0.3)
-    ffi (1.15.5)
-    fourflusher (2.3.1)
-    fuzzy_match (2.0.4)
-    gh_inspector (1.1.3)
-    git (1.11.0)
+    git (1.19.1)
+      addressable (~> 2.8)
       rchardet (~> 1.8)
-    httpclient (2.8.3)
-    i18n (1.12.0)
-      concurrent-ruby (~> 1.0)
-    json (2.6.2)
-    kramdown (2.4.0)
-      rexml
+    json (2.15.0)
+    kramdown (2.5.1)
+      rexml (>= 3.3.9)
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
-    minitest (5.16.2)
-    molinillo (0.8.0)
-    multipart-post (2.2.3)
-    nanaimo (0.3.0)
+    language_server-protocol (3.17.0.5)
+    lint_roller (1.1.0)
+    multipart-post (2.4.1)
     nap (1.1.0)
-    netrc (0.11.0)
     no_proxy_fix (0.1.2)
     octokit (4.25.1)
       faraday (>= 1, < 3)
       sawyer (~> 0.9)
     open4 (1.3.4)
-    parallel (1.22.1)
-    parser (3.1.2.0)
+    parallel (1.27.0)
+    parser (3.3.9.0)
       ast (~> 2.4.1)
+      racc
+    prism (1.5.1)
     public_suffix (4.0.7)
+    racc (1.8.1)
     rainbow (3.1.1)
-    rake (13.0.6)
-    rchardet (1.8.0)
-    regexp_parser (2.5.0)
-    rexml (3.2.5)
-    rouge (2.0.7)
-    rubocop (1.32.0)
+    rake (13.3.0)
+    rchardet (1.10.0)
+    regexp_parser (2.11.3)
+    rexml (3.4.4)
+    rouge (3.28.0)
+    rubocop (1.81.1)
       json (~> 2.3)
+      language_server-protocol (~> 3.17.0.2)
+      lint_roller (~> 1.1.0)
       parallel (~> 1.10)
-      parser (>= 3.1.0.0)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.19.1, < 2.0)
+      regexp_parser (>= 2.9.3, < 3.0)
+      rubocop-ast (>= 1.47.1, < 2.0)
       ruby-progressbar (~> 1.7)
-      unicode-display_width (>= 1.4.0, < 3.0)
-    rubocop-ast (1.19.1)
-      parser (>= 3.1.1.0)
-    ruby-macho (2.5.1)
-    ruby-progressbar (1.11.0)
+      unicode-display_width (>= 2.4.0, < 4.0)
+    rubocop-ast (1.47.1)
+      parser (>= 3.3.7.2)
+      prism (~> 1.4)
+    ruby-progressbar (1.13.0)
     ruby2_keywords (0.0.5)
     sawyer (0.9.2)
       addressable (>= 2.3.5)
       faraday (>= 0.17.3, < 3)
-    terminal-table (3.0.2)
-      unicode-display_width (>= 1.1.1, < 3)
-    typhoeus (1.4.0)
-      ethon (>= 0.9.0)
-    tzinfo (2.0.5)
-      concurrent-ruby (~> 1.0)
-    unicode-display_width (2.2.0)
-    xcodeproj (1.22.0)
-      CFPropertyList (>= 2.3.3, < 4.0)
-      atomos (~> 0.1.3)
-      claide (>= 1.0.2, < 2.0)
-      colored2 (~> 3.1)
-      nanaimo (~> 0.3.0)
-      rexml (~> 3.2.4)
-    xcpretty (0.3.0)
-      rouge (~> 2.0.7)
-    zeitwerk (2.6.0)
+    terminal-table (1.6.0)
+    unicode-display_width (3.2.0)
+      unicode-emoji (~> 4.1)
+    unicode-emoji (4.1.0)
+    xcpretty (0.4.1)
+      rouge (~> 3.28.0)
 
 PLATFORMS
+  aarch64-linux-gnu
+  aarch64-linux-musl
+  arm-linux-gnu
+  arm-linux-musl
+  arm64-darwin
   ruby
+  x86-linux-gnu
+  x86-linux-musl
+  x86_64-darwin
+  x86_64-linux-gnu
+  x86_64-linux-musl
 
 DEPENDENCIES
-  cocoapods (~> 1.11)
+  base64 (~> 0.3)
   danger (~> 8.4)
   octokit (~> 4.7)
   rake (~> 13.0)
@@ -186,4 +129,4 @@ DEPENDENCIES
   xcpretty (~> 0.3)
 
 BUNDLED WITH
-   2.2.33
+   2.7.2

LICENSE

@@ -1,4 +1,5 @@
-Copyright (c) 2022, Kyle Fuller
+Copyright (c) 2022, Kyle Fuller as the original author
+Copyright (c) 2025, Astzweig GmbH & Co. KG
 All rights reserved.
 
 Redistribution and use in source and binary forms, with or without

Package.resolved

@@ -1,15 +1,6 @@
 {
   "object": {
     "pins": [
-      {
-        "package": "PathKit",
-        "repositoryURL": "https://github.com/kylef/PathKit.git",
-        "state": {
-          "branch": null,
-          "revision": "3bfd2737b700b9a36565a8c94f4ad2b050a5e574",
-          "version": "1.0.1"
-        }
-      },
       {
         "package": "Spectre",
         "repositoryURL": "https://github.com/kylef/Spectre.git",
@@ -18,6 +9,15 @@
           "revision": "26cc5e9ae0947092c7139ef7ba612e34646086c7",
           "version": "0.10.1"
         }
+      },
+      {
+        "package": "swiftpm-pathkit",
+        "repositoryURL": "https://github.com/astzweig/swiftpm-pathkit.git",
+        "state": {
+          "branch": null,
+          "revision": "5d164c34f35fa7241d77357e965acde80efcb6d9",
+          "version": "1.5.0"
+        }
       }
     ]
   },

Package.swift

@@ -7,7 +7,7 @@ let package = Package(
     .library(name: "Stencil", targets: ["Stencil"])
   ],
   dependencies: [
-    .package(url: "https://github.com/kylef/PathKit.git", from: "1.0.1"),
+    .package(url: "https://github.com/astzweig/swiftpm-pathkit.git", from: "1.5.0"),
     .package(url: "https://github.com/kylef/Spectre.git", from: "0.10.1")
   ],
   targets: [

Rakefile

@@ -34,9 +34,7 @@ namespace :files do
     )
     docs_package = Utils.first_match_in_file('docs/installation.rst', /\.package\(url: .+ from: "(.+)"/, 1)
     replace("docs/installation.rst",
-      /\.package\(url: .+, from: "(.+)"/ => %Q(.package\(url: "https://github.com/stencilproject/Stencil.git", from: "#{version}"),
-      /pod 'Stencil', '.*'/ => %Q(pod 'Stencil', '~> #{version}'),
-      /github "stencilproject\/Stencil" ~> .*/ => %Q(github "stencilproject/Stencil" ~> #{version})
+      /\.package\(url: .+, from: "(.+)"/ => %Q(.package\(url: "https://github.com/swiftstencil/swiftpm-stencil.git", from: "#{version}")
     )
   end
 

Sources/Stencil/Context.swift

@@ -1,111 +1,106 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// A container for template variables.
 public class Context {
-  var dictionaries: [[String: Any?]]
+	var dictionaries: [[String: Any?]]
 
-  /// The context's environment, such as registered extensions, classes, …
-  public let environment: Environment
+	/// The context's environment, such as registered extensions, classes, …
+	public let environment: Environment
 
-  init(dictionaries: [[String: Any?]], environment: Environment) {
-    self.dictionaries = dictionaries
-    self.environment = environment
-  }
+	init(dictionaries: [[String: Any?]], environment: Environment) {
+		self.dictionaries = dictionaries
+		self.environment = environment
+	}
 
-  /// Create a context from a dictionary (and an env.)
-  ///
-  /// - Parameters:
-  ///   - dictionary: The context's data
-  ///   - environment: Environment such as extensions, …
-  public convenience init(dictionary: [String: Any] = [:], environment: Environment? = nil) {
-    self.init(
-      dictionaries: dictionary.isEmpty ? [] : [dictionary],
-      environment: environment ?? Environment()
-    )
-  }
+	/// Create a context from a dictionary (and an env.)
+	///
+	/// - Parameters:
+	///		- dictionary: The context's data
+	///		- environment: Environment such as extensions, …
+	public convenience init(dictionary: [String: Any] = [:], environment: Environment? = nil) {
+		self.init(
+			dictionaries: dictionary.isEmpty ? [] : [dictionary],
+			environment: environment ?? Environment()
+		)
+	}
 
-  /// Access variables in this context by name
-  public subscript(key: String) -> Any? {
-    /// Retrieves a variable's value, starting at the current context and going upwards
-    get {
-      for dictionary in Array(dictionaries.reversed()) {
-        if let value = dictionary[key] {
-          return value
-        }
-      }
+	/// Access variables in this context by name
+	public subscript(key: String) -> Any? {
+		/// Retrieves a variable's value, starting at the current context and going upwards
+		get {
+			for dictionary in Array(dictionaries.reversed()) {
+				if let value = dictionary[key] {
+					return value
+				}
+			}
 
-      return nil
-    }
+			return nil
+		}
 
-    /// Set a variable in the current context, deleting the variable if it's nil
-    set(value) {
-      if var dictionary = dictionaries.popLast() {
-        dictionary[key] = value
-        dictionaries.append(dictionary)
-      }
-    }
-  }
+		/// Set a variable in the current context, deleting the variable if it's nil
+		set(value) {
+			if var dictionary = dictionaries.popLast() {
+				dictionary[key] = value
+				dictionaries.append(dictionary)
+			}
+		}
+	}
 
-  /// Push a new level into the Context
-  ///
-  /// - Parameters:
-  ///   - dictionary: The new level data
-  fileprivate func push(_ dictionary: [String: Any] = [:]) {
-    dictionaries.append(dictionary)
-  }
+	/// Push a new level into the Context
+	///
+	/// - Parameters:
+	///		- dictionary: The new level data
+	fileprivate func push(_ dictionary: [String: Any] = [:]) {
+		dictionaries.append(dictionary)
+	}
 
-  /// Pop the last level off of the Context
-  ///
-  /// - returns: The popped level
-  fileprivate func pop() -> [String: Any?]? {
-    dictionaries.popLast()
-  }
+	/// Pop the last level off of the Context
+	///
+	/// - returns: The popped level
+	// swiftlint:disable:next discouraged_optional_collection
+	fileprivate func pop() -> [String: Any?]? {
+		dictionaries.popLast()
+	}
 
-  /// Push a new level onto the context for the duration of the execution of the given closure
-  ///
-  /// - Parameters:
-  ///   - dictionary: The new level data
-  ///   - closure: The closure to execute
-  /// - returns: Return value of the closure
-  public func push<Result>(dictionary: [String: Any] = [:], closure: (() throws -> Result)) rethrows -> Result {
-    push(dictionary)
-    defer { _ = pop() }
-    return try closure()
-  }
+	/// Push a new level onto the context for the duration of the execution of the given closure
+	///
+	/// - Parameters:
+	///		- dictionary: The new level data
+	///		- closure: The closure to execute
+	/// - returns: Return value of the closure
+	public func push<Result>(dictionary: [String: Any] = [:], closure: (() throws -> Result)) rethrows -> Result {
+		push(dictionary)
+		defer { _ = pop() }
+		return try closure()
+	}
 
-  /// Flatten all levels of context data into 1, merging duplicate variables
-  /// 
-  /// - returns: All collected variables
-  public func flatten() -> [String: Any] {
-    var accumulator: [String: Any] = [:]
+	/// Flatten all levels of context data into 1, merging duplicate variables
+	///
+	/// - returns: All collected variables
+	public func flatten() -> [String: Any] {
+		var accumulator: [String: Any] = [:]
 
-    for dictionary in dictionaries {
-      for (key, value) in dictionary {
-        if let value = value {
-          accumulator.updateValue(value, forKey: key)
-        }
-      }
-    }
+		for dictionary in dictionaries {
+			for (key, value) in dictionary {
+				if let value = value {
+					accumulator.updateValue(value, forKey: key)
+				}
+			}
+		}
 
-    return accumulator
-  }
+		return accumulator
+	}
 
-  /// Cache result of block by its name in the context top-level, so that it can be later rendered
-  /// via `{{ block.name }}`
-  ///
-  /// - Parameters:
-  ///   - name: The name of the stored block
-  ///   - content: The block's rendered content
-  public func cacheBlock(_ name: String, content: String) {
-    if var block = dictionaries.first?["block"] as? [String: String] {
-      block[name] = content
-      dictionaries[0]["block"] = block
-    } else {
-      dictionaries.insert(["block": [name: content]], at: 0)
-    }
-  }
+	/// Cache result of block by its name in the context top-level, so that it can be later rendered
+	/// via `{{ block.name }}`
+	///
+	/// - Parameters:
+	///		- name: The name of the stored block
+	///		- content: The block's rendered content
+	public func cacheBlock(_ name: String, content: String) {
+		if var block = dictionaries.first?["block"] as? [String: String] {
+			block[name] = content
+			dictionaries[0]["block"] = block
+		} else {
+			dictionaries.insert(["block": [name: content]], at: 0)
+		}
+	}
 }

Sources/Stencil/DynamicMemberLookup.swift

@@ -1,24 +1,18 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// Marker protocol so we can know which types support `@dynamicMemberLookup`. Add this to your own types that support
 /// lookup by String.
 public protocol DynamicMemberLookup {
-  /// Get a value for a given `String` key
-  subscript(dynamicMember member: String) -> Any? { get }
+	/// Get a value for a given `String` key
+	subscript(dynamicMember member: String) -> Any? { get }
 }
 
 public extension DynamicMemberLookup where Self: RawRepresentable {
-  /// Get a value for a given `String` key
-  subscript(dynamicMember member: String) -> Any? {
-    switch member {
-    case "rawValue":
-      return rawValue
-    default:
-      return nil
-    }
-  }
+	/// Get a value for a given `String` key
+	subscript(dynamicMember member: String) -> Any? {
+		switch member {
+		case "rawValue":
+			return rawValue
+		default:
+			return nil
+		}
+	}
 }

Sources/Stencil/Environment.swift

@@ -1,90 +1,84 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// Container for environment data, such as registered extensions
 public struct Environment {
-  /// The class for loading new templates
-  public let templateClass: Template.Type
-  /// List of registered extensions
-  public var extensions: [Extension]
-  /// How to handle whitespace
-  public var trimBehaviour: TrimBehaviour
-  /// Mechanism for loading new files
-  public var loader: Loader?
+	/// The class for loading new templates
+	public let templateClass: Template.Type
+	/// List of registered extensions
+	public var extensions: [Extension]
+	/// How to handle whitespace
+	public var trimBehaviour: TrimBehaviour
+	/// Mechanism for loading new files
+	public var loader: Loader?
 
-  /// Basic initializer
-  ///
-  /// - Parameters:
-  ///  - loader: Mechanism for loading new files
-  ///  - extensions: List of extension containers
-  ///  - templateClass: Class for newly loaded templates
-  ///  - trimBehaviour: How to handle whitespace
-  public init(
-    loader: Loader? = nil,
-    extensions: [Extension] = [],
-    templateClass: Template.Type = Template.self,
-    trimBehaviour: TrimBehaviour = .nothing
-  ) {
-    self.templateClass = templateClass
-    self.loader = loader
-    self.extensions = extensions + [DefaultExtension()]
-    self.trimBehaviour = trimBehaviour
-  }
+	/// Basic initializer
+	///
+	/// - Parameters:
+	///	 - loader: Mechanism for loading new files
+	///	 - extensions: List of extension containers
+	///	 - templateClass: Class for newly loaded templates
+	///	 - trimBehaviour: How to handle whitespace
+	public init(
+		loader: Loader? = nil,
+		extensions: [Extension] = [],
+		templateClass: Template.Type = Template.self,
+		trimBehaviour: TrimBehaviour = .nothing
+	) {
+		self.templateClass = templateClass
+		self.loader = loader
+		self.extensions = extensions + [DefaultExtension()]
+		self.trimBehaviour = trimBehaviour
+	}
 
-  /// Load a template with the given name
-  ///
-  /// - Parameters:
-  ///  - name: Name of the template
-  /// - returns: Loaded template instance
-  public func loadTemplate(name: String) throws -> Template {
-    if let loader = loader {
-      return try loader.loadTemplate(name: name, environment: self)
-    } else {
-      throw TemplateDoesNotExist(templateNames: [name], loader: nil)
-    }
-  }
+	/// Load a template with the given name
+	///
+	/// - Parameters:
+	///	 - name: Name of the template
+	/// - returns: Loaded template instance
+	public func loadTemplate(name: String) throws -> Template {
+		if let loader = loader {
+			return try loader.loadTemplate(name: name, environment: self)
+		} else {
+			throw TemplateDoesNotExist(templateNames: [name], loader: nil)
+		}
+	}
 
-  /// Load a template with the given names
-  ///
-  /// - Parameters:
-  ///  - names: Names of the template
-  /// - returns: Loaded template instance
-  public func loadTemplate(names: [String]) throws -> Template {
-    if let loader = loader {
-      return try loader.loadTemplate(names: names, environment: self)
-    } else {
-      throw TemplateDoesNotExist(templateNames: names, loader: nil)
-    }
-  }
+	/// Load a template with the given names
+	///
+	/// - Parameters:
+	///	 - names: Names of the template
+	/// - returns: Loaded template instance
+	public func loadTemplate(names: [String]) throws -> Template {
+		if let loader = loader {
+			return try loader.loadTemplate(names: names, environment: self)
+		} else {
+			throw TemplateDoesNotExist(templateNames: names, loader: nil)
+		}
+	}
 
-  /// Render a template with the given name, providing some data
-  ///
-  /// - Parameters:
-  ///  - name: Name of the template
-  ///  - context: Data for rendering
-  /// - returns: Rendered output
-  public func renderTemplate(name: String, context: [String: Any] = [:]) throws -> String {
-    let template = try loadTemplate(name: name)
-    return try render(template: template, context: context)
-  }
+	/// Render a template with the given name, providing some data
+	///
+	/// - Parameters:
+	///	 - name: Name of the template
+	///	 - context: Data for rendering
+	/// - returns: Rendered output
+	public func renderTemplate(name: String, context: [String: Any] = [:]) throws -> String {
+		let template = try loadTemplate(name: name)
+		return try render(template: template, context: context)
+	}
 
-  /// Render the given template string, providing some data
-  ///
-  /// - Parameters:
-  ///  - string: Template string
-  ///  - context: Data for rendering
-  /// - returns: Rendered output
-  public func renderTemplate(string: String, context: [String: Any] = [:]) throws -> String {
-    let template = templateClass.init(templateString: string, environment: self)
-    return try render(template: template, context: context)
-  }
+	/// Render the given template string, providing some data
+	///
+	/// - Parameters:
+	///	 - string: Template string
+	///	 - context: Data for rendering
+	/// - returns: Rendered output
+	public func renderTemplate(string: String, context: [String: Any] = [:]) throws -> String {
+		let template = templateClass.init(templateString: string, environment: self)
+		return try render(template: template, context: context)
+	}
 
-  func render(template: Template, context: [String: Any]) throws -> String {
-    // update template environment as it can be created from string literal with default environment
-    template.environment = self
-    return try template.render(context)
-  }
+	func render(template: Template, context: [String: Any]) throws -> String {
+		// update template environment as it can be created from string literal with default environment
+		template.environment = self
+		return try template.render(context)
+	}
 }

Sources/Stencil/Errors.swift

@@ -1,87 +1,81 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 public class TemplateDoesNotExist: Error, CustomStringConvertible {
-  let templateNames: [String]
-  let loader: Loader?
+	let templateNames: [String]
+	let loader: Loader?
 
-  public init(templateNames: [String], loader: Loader? = nil) {
-    self.templateNames = templateNames
-    self.loader = loader
-  }
+	public init(templateNames: [String], loader: Loader? = nil) {
+		self.templateNames = templateNames
+		self.loader = loader
+	}
 
-  public var description: String {
-    let templates = templateNames.joined(separator: ", ")
+	public var description: String {
+		let templates = templateNames.joined(separator: ", ")
 
-    if let loader = loader {
-      return "Template named `\(templates)` does not exist in loader \(loader)"
-    }
+		if let loader = loader {
+			return "Template named `\(templates)` does not exist in loader \(loader)"
+		}
 
-    return "Template named `\(templates)` does not exist. No loaders found"
-  }
+		return "Template named `\(templates)` does not exist. No loaders found"
+	}
 }
 
 public struct TemplateSyntaxError: Error, Equatable, CustomStringConvertible {
-  public let reason: String
-  public var description: String { reason }
-  public internal(set) var token: Token?
-  public internal(set) var stackTrace: [Token]
-  public var templateName: String? { token?.sourceMap.filename }
-  var allTokens: [Token] {
-    stackTrace + (token.map { [$0] } ?? [])
-  }
+	public let reason: String
+	public var description: String { reason }
+	public internal(set) var token: Token?
+	public internal(set) var stackTrace: [Token]
+	public var templateName: String? { token?.sourceMap.filename }
+	var allTokens: [Token] {
+		stackTrace + (token.map { [$0] } ?? [])
+	}
 
-  public init(reason: String, token: Token? = nil, stackTrace: [Token] = []) {
-    self.reason = reason
-    self.stackTrace = stackTrace
-    self.token = token
-  }
+	public init(reason: String, token: Token? = nil, stackTrace: [Token] = []) {
+		self.reason = reason
+		self.stackTrace = stackTrace
+		self.token = token
+	}
 
-  public init(_ description: String) {
-    self.init(reason: description)
-  }
+	public init(_ description: String) {
+		self.init(reason: description)
+	}
 }
 
 extension Error {
-  func withToken(_ token: Token?) -> Error {
-    if var error = self as? TemplateSyntaxError {
-      error.token = error.token ?? token
-      return error
-    } else {
-      return TemplateSyntaxError(reason: "\(self)", token: token)
-    }
-  }
+	func withToken(_ token: Token?) -> Error {
+		if var error = self as? TemplateSyntaxError {
+			error.token = error.token ?? token
+			return error
+		} else {
+			return TemplateSyntaxError(reason: "\(self)", token: token)
+		}
+	}
 }
 
 public protocol ErrorReporter: AnyObject {
-  func renderError(_ error: Error) -> String
+	func renderError(_ error: Error) -> String
 }
 
 open class SimpleErrorReporter: ErrorReporter {
-  open func renderError(_ error: Error) -> String {
-    guard let templateError = error as? TemplateSyntaxError else { return error.localizedDescription }
+	open func renderError(_ error: Error) -> String {
+		guard let templateError = error as? TemplateSyntaxError else { return error.localizedDescription }
 
-    func describe(token: Token) -> String {
-      let templateName = token.sourceMap.filename ?? ""
-      let location = token.sourceMap.location
-      let highlight = """
-        \(String(Array(repeating: " ", count: location.lineOffset)))\
-        ^\(String(Array(repeating: "~", count: max(token.contents.count - 1, 0))))
-        """
+		func describe(token: Token) -> String {
+			let templateName = token.sourceMap.filename ?? ""
+			let location = token.sourceMap.location
+			let highlight = """
+				\(String(Array(repeating: " ", count: location.lineOffset)))\
+				^\(String(Array(repeating: "~", count: max(token.contents.count - 1, 0))))
+				"""
 
-      return """
-        \(templateName)\(location.lineNumber):\(location.lineOffset): error: \(templateError.reason)
-        \(location.content)
-        \(highlight)
-        """
-    }
+			return """
+				\(templateName)\(location.lineNumber):\(location.lineOffset): error: \(templateError.reason)
+				\(location.content)
+				\(highlight)
+				"""
+		}
 
 	var descriptions = templateError.stackTrace.reduce(into: []) { $0.append(describe(token: $1)) }
-    let description = templateError.token.map(describe(token:)) ?? templateError.reason
-    descriptions.append(description)
-    return descriptions.joined(separator: "\n")
-  }
+		let description = templateError.token.map(describe(token:)) ?? templateError.reason
+		descriptions.append(description)
+		return descriptions.joined(separator: "\n")
+	}
 }

Sources/Stencil/Expression.swift

@@ -1,333 +1,327 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 public protocol Expression: CustomStringConvertible, Resolvable {
-  func evaluate(context: Context) throws -> Bool
+	func evaluate(context: Context) throws -> Bool
 }
 
 extension Expression {
-  func resolve(_ context: Context) throws -> Any? {
-    try "\(evaluate(context: context))"
-  }
+	func resolve(_ context: Context) throws -> Any? {
+		try "\(evaluate(context: context))"
+	}
 }
 
 protocol InfixOperator: Expression {
-  init(lhs: Expression, rhs: Expression)
+	init(lhs: Expression, rhs: Expression)
 }
 
 protocol PrefixOperator: Expression {
-  init(expression: Expression)
+	init(expression: Expression)
 }
 
 final class StaticExpression: Expression, CustomStringConvertible {
-  let value: Bool
+	let value: Bool
 
-  init(value: Bool) {
-    self.value = value
-  }
+	init(value: Bool) {
+		self.value = value
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    value
-  }
+	func evaluate(context: Context) throws -> Bool {
+		value
+	}
 
-  var description: String {
-    "\(value)"
-  }
+	var description: String {
+		"\(value)"
+	}
 }
 
 final class VariableExpression: Expression, CustomStringConvertible {
-  let variable: Resolvable
+	let variable: Resolvable
 
-  init(variable: Resolvable) {
-    self.variable = variable
-  }
+	init(variable: Resolvable) {
+		self.variable = variable
+	}
 
-  var description: String {
-    "(variable: \(variable))"
-  }
+	var description: String {
+		"(variable: \(variable))"
+	}
 
-  func resolve(_ context: Context) throws -> Any? {
-    try variable.resolve(context)
-  }
+	func resolve(_ context: Context) throws -> Any? {
+		try variable.resolve(context)
+	}
 
-  /// Resolves a variable in the given context as boolean
-  func evaluate(context: Context) throws -> Bool {
-    let result = try variable.resolve(context)
-    var truthy = false
+	/// Resolves a variable in the given context as boolean
+	func evaluate(context: Context) throws -> Bool {
+		let result = try variable.resolve(context)
+		var truthy = false
 
-    if let result = result as? [Any] {
-      truthy = !result.isEmpty
-    } else if let result = result as? [String: Any] {
-      truthy = !result.isEmpty
-    } else if let result = result as? Bool {
-      truthy = result
-    } else if let result = result as? String {
-      truthy = !result.isEmpty
-    } else if let value = result, let result = toNumber(value: value) {
-      truthy = result > 0
-    } else if result != nil {
-      truthy = true
-    }
+		if let result = result as? [Any] {
+			truthy = !result.isEmpty
+		} else if let result = result as? [String: Any] {
+			truthy = !result.isEmpty
+		} else if let result = result as? Bool {
+			truthy = result
+		} else if let result = result as? String {
+			truthy = !result.isEmpty
+		} else if let value = result, let result = toNumber(value: value) {
+			truthy = result > 0
+		} else if result != nil {
+			truthy = true
+		}
 
-    return truthy
-  }
+		return truthy
+	}
 }
 
 final class NotExpression: Expression, PrefixOperator, CustomStringConvertible {
-  let expression: Expression
+	let expression: Expression
 
-  init(expression: Expression) {
-    self.expression = expression
-  }
+	init(expression: Expression) {
+		self.expression = expression
+	}
 
-  var description: String {
-    "not \(expression)"
-  }
+	var description: String {
+		"not \(expression)"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    try !expression.evaluate(context: context)
-  }
+	func evaluate(context: Context) throws -> Bool {
+		try !expression.evaluate(context: context)
+	}
 }
 
 final class InExpression: Expression, InfixOperator, CustomStringConvertible {
-  let lhs: Expression
-  let rhs: Expression
+	let lhs: Expression
+	let rhs: Expression
 
-  init(lhs: Expression, rhs: Expression) {
-    self.lhs = lhs
-    self.rhs = rhs
-  }
+	init(lhs: Expression, rhs: Expression) {
+		self.lhs = lhs
+		self.rhs = rhs
+	}
 
-  var description: String {
-    "(\(lhs) in \(rhs))"
-  }
+	var description: String {
+		"(\(lhs) in \(rhs))"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
-      let lhsValue = try lhs.variable.resolve(context)
-      let rhsValue = try rhs.variable.resolve(context)
+	func evaluate(context: Context) throws -> Bool {
+		if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
+			let lhsValue = try lhs.variable.resolve(context)
+			let rhsValue = try rhs.variable.resolve(context)
 
-      if let lhs = lhsValue as? AnyHashable, let rhs = rhsValue as? [AnyHashable] {
-        return rhs.contains(lhs)
-      } else if let lhs = lhsValue as? Int, let rhs = rhsValue as? CountableClosedRange<Int> {
-        return rhs.contains(lhs)
-      } else if let lhs = lhsValue as? Int, let rhs = rhsValue as? CountableRange<Int> {
-        return rhs.contains(lhs)
-      } else if let lhs = lhsValue as? String, let rhs = rhsValue as? String {
-        return rhs.contains(lhs)
-      } else if lhsValue == nil && rhsValue == nil {
-        return true
-      }
-    }
+			if let lhs = lhsValue as? AnyHashable, let rhs = rhsValue as? [AnyHashable] {
+				return rhs.contains(lhs)
+			} else if let lhs = lhsValue as? Int, let rhs = rhsValue as? CountableClosedRange<Int> {
+				return rhs.contains(lhs)
+			} else if let lhs = lhsValue as? Int, let rhs = rhsValue as? CountableRange<Int> {
+				return rhs.contains(lhs)
+			} else if let lhs = lhsValue as? String, let rhs = rhsValue as? String {
+				return rhs.contains(lhs)
+			} else if lhsValue == nil && rhsValue == nil {
+				return true
+			}
+		}
 
-    return false
-  }
+		return false
+	}
 }
 
 final class OrExpression: Expression, InfixOperator, CustomStringConvertible {
-  let lhs: Expression
-  let rhs: Expression
+	let lhs: Expression
+	let rhs: Expression
 
-  init(lhs: Expression, rhs: Expression) {
-    self.lhs = lhs
-    self.rhs = rhs
-  }
+	init(lhs: Expression, rhs: Expression) {
+		self.lhs = lhs
+		self.rhs = rhs
+	}
 
-  var description: String {
-    "(\(lhs) or \(rhs))"
-  }
+	var description: String {
+		"(\(lhs) or \(rhs))"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    let lhs = try self.lhs.evaluate(context: context)
-    if lhs {
-      return lhs
-    }
+	func evaluate(context: Context) throws -> Bool {
+		let lhs = try self.lhs.evaluate(context: context)
+		if lhs {
+			return lhs
+		}
 
-    return try rhs.evaluate(context: context)
-  }
+		return try rhs.evaluate(context: context)
+	}
 }
 
 final class AndExpression: Expression, InfixOperator, CustomStringConvertible {
-  let lhs: Expression
-  let rhs: Expression
+	let lhs: Expression
+	let rhs: Expression
 
-  init(lhs: Expression, rhs: Expression) {
-    self.lhs = lhs
-    self.rhs = rhs
-  }
+	init(lhs: Expression, rhs: Expression) {
+		self.lhs = lhs
+		self.rhs = rhs
+	}
 
-  var description: String {
-    "(\(lhs) and \(rhs))"
-  }
+	var description: String {
+		"(\(lhs) and \(rhs))"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    let lhs = try self.lhs.evaluate(context: context)
-    if !lhs {
-      return lhs
-    }
+	func evaluate(context: Context) throws -> Bool {
+		let lhs = try self.lhs.evaluate(context: context)
+		if !lhs {
+			return lhs
+		}
 
-    return try rhs.evaluate(context: context)
-  }
+		return try rhs.evaluate(context: context)
+	}
 }
 
 class EqualityExpression: Expression, InfixOperator, CustomStringConvertible {
-  let lhs: Expression
-  let rhs: Expression
+	let lhs: Expression
+	let rhs: Expression
 
-  required init(lhs: Expression, rhs: Expression) {
-    self.lhs = lhs
-    self.rhs = rhs
-  }
+	required init(lhs: Expression, rhs: Expression) {
+		self.lhs = lhs
+		self.rhs = rhs
+	}
 
-  var description: String {
-    "(\(lhs) == \(rhs))"
-  }
+	var description: String {
+		"(\(lhs) == \(rhs))"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
-      let lhsValue = try lhs.variable.resolve(context)
-      let rhsValue = try rhs.variable.resolve(context)
+	func evaluate(context: Context) throws -> Bool {
+		if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
+			let lhsValue = try lhs.variable.resolve(context)
+			let rhsValue = try rhs.variable.resolve(context)
 
-      if let lhs = lhsValue, let rhs = rhsValue {
-        if let lhs = toNumber(value: lhs), let rhs = toNumber(value: rhs) {
-          return lhs == rhs
-        } else if let lhs = lhsValue as? String, let rhs = rhsValue as? String {
-          return lhs == rhs
-        } else if let lhs = lhsValue as? Bool, let rhs = rhsValue as? Bool {
-          return lhs == rhs
-        }
-      } else if lhsValue == nil && rhsValue == nil {
-        return true
-      }
-    }
+			if let lhs = lhsValue, let rhs = rhsValue {
+				if let lhs = toNumber(value: lhs), let rhs = toNumber(value: rhs) {
+					return lhs == rhs
+				} else if let lhs = lhsValue as? String, let rhs = rhsValue as? String {
+					return lhs == rhs
+				} else if let lhs = lhsValue as? Bool, let rhs = rhsValue as? Bool {
+					return lhs == rhs
+				}
+			} else if lhsValue == nil && rhsValue == nil {
+				return true
+			}
+		}
 
-    return false
-  }
+		return false
+	}
 }
 
 class NumericExpression: Expression, InfixOperator, CustomStringConvertible {
-  let lhs: Expression
-  let rhs: Expression
+	let lhs: Expression
+	let rhs: Expression
 
-  required init(lhs: Expression, rhs: Expression) {
-    self.lhs = lhs
-    self.rhs = rhs
-  }
+	required init(lhs: Expression, rhs: Expression) {
+		self.lhs = lhs
+		self.rhs = rhs
+	}
 
-  var description: String {
-    "(\(lhs) \(symbol) \(rhs))"
-  }
+	var description: String {
+		"(\(lhs) \(symbol) \(rhs))"
+	}
 
-  func evaluate(context: Context) throws -> Bool {
-    if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
-      let lhsValue = try lhs.variable.resolve(context)
-      let rhsValue = try rhs.variable.resolve(context)
+	func evaluate(context: Context) throws -> Bool {
+		if let lhs = lhs as? VariableExpression, let rhs = rhs as? VariableExpression {
+			let lhsValue = try lhs.variable.resolve(context)
+			let rhsValue = try rhs.variable.resolve(context)
 
-      if let lhs = lhsValue, let rhs = rhsValue {
-        if let lhs = toNumber(value: lhs), let rhs = toNumber(value: rhs) {
-          return compare(lhs: lhs, rhs: rhs)
-        }
-      }
-    }
+			if let lhs = lhsValue, let rhs = rhsValue {
+				if let lhs = toNumber(value: lhs), let rhs = toNumber(value: rhs) {
+					return compare(lhs: lhs, rhs: rhs)
+				}
+			}
+		}
 
-    return false
-  }
+		return false
+	}
 
-  var symbol: String {
-    ""
-  }
+	var symbol: String {
+		""
+	}
 
-  func compare(lhs: Number, rhs: Number) -> Bool {
-    false
-  }
+	func compare(lhs: Number, rhs: Number) -> Bool {
+		false
+	}
 }
 
 class MoreThanExpression: NumericExpression {
-  override var symbol: String {
-    ">"
-  }
+	override var symbol: String {
+		">"
+	}
 
-  override func compare(lhs: Number, rhs: Number) -> Bool {
-    lhs > rhs
-  }
+	override func compare(lhs: Number, rhs: Number) -> Bool {
+		lhs > rhs
+	}
 }
 
 class MoreThanEqualExpression: NumericExpression {
-  override var symbol: String {
-    ">="
-  }
+	override var symbol: String {
+		">="
+	}
 
-  override func compare(lhs: Number, rhs: Number) -> Bool {
-    lhs >= rhs
-  }
+	override func compare(lhs: Number, rhs: Number) -> Bool {
+		lhs >= rhs
+	}
 }
 
 class LessThanExpression: NumericExpression {
-  override var symbol: String {
-    "<"
-  }
+	override var symbol: String {
+		"<"
+	}
 
-  override func compare(lhs: Number, rhs: Number) -> Bool {
-    lhs < rhs
-  }
+	override func compare(lhs: Number, rhs: Number) -> Bool {
+		lhs < rhs
+	}
 }
 
 class LessThanEqualExpression: NumericExpression {
-  override var symbol: String {
-    "<="
-  }
+	override var symbol: String {
+		"<="
+	}
 
-  override func compare(lhs: Number, rhs: Number) -> Bool {
-    lhs <= rhs
-  }
+	override func compare(lhs: Number, rhs: Number) -> Bool {
+		lhs <= rhs
+	}
 }
 
 class InequalityExpression: EqualityExpression {
-  override var description: String {
-    "(\(lhs) != \(rhs))"
-  }
+	override var description: String {
+		"(\(lhs) != \(rhs))"
+	}
 
-  override func evaluate(context: Context) throws -> Bool {
-    try !super.evaluate(context: context)
-  }
+	override func evaluate(context: Context) throws -> Bool {
+		try !super.evaluate(context: context)
+	}
 }
 
 // swiftlint:disable:next cyclomatic_complexity
 func toNumber(value: Any) -> Number? {
-  if let value = value as? Float {
-    return Number(value)
-  } else if let value = value as? Double {
-    return Number(value)
-  } else if let value = value as? UInt {
-    return Number(value)
-  } else if let value = value as? Int {
-    return Number(value)
-  } else if let value = value as? Int8 {
-    return Number(value)
-  } else if let value = value as? Int16 {
-    return Number(value)
-  } else if let value = value as? Int32 {
-    return Number(value)
-  } else if let value = value as? Int64 {
-    return Number(value)
-  } else if let value = value as? UInt8 {
-    return Number(value)
-  } else if let value = value as? UInt16 {
-    return Number(value)
-  } else if let value = value as? UInt32 {
-    return Number(value)
-  } else if let value = value as? UInt64 {
-    return Number(value)
-  } else if let value = value as? Number {
-    return value
-  } else if let value = value as? Float64 {
-    return Number(value)
-  } else if let value = value as? Float32 {
-    return Number(value)
-  }
+	if let value = value as? Float {
+		return Number(value)
+	} else if let value = value as? Double {
+		return Number(value)
+	} else if let value = value as? UInt {
+		return Number(value)
+	} else if let value = value as? Int {
+		return Number(value)
+	} else if let value = value as? Int8 {
+		return Number(value)
+	} else if let value = value as? Int16 {
+		return Number(value)
+	} else if let value = value as? Int32 {
+		return Number(value)
+	} else if let value = value as? Int64 {
+		return Number(value)
+	} else if let value = value as? UInt8 {
+		return Number(value)
+	} else if let value = value as? UInt16 {
+		return Number(value)
+	} else if let value = value as? UInt32 {
+		return Number(value)
+	} else if let value = value as? UInt64 {
+		return Number(value)
+	} else if let value = value as? Number {
+		return value
+	} else if let value = value as? Float64 {
+		return Number(value)
+	} else if let value = value as? Float32 {
+		return Number(value)
+	}
 
-  return nil
+	return nil
 }

Sources/Stencil/Extension.swift

@@ -1,109 +1,103 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// Container for registered tags and filters
 open class Extension {
-  typealias TagParser = (TokenParser, Token) throws -> NodeType
+	typealias TagParser = (TokenParser, Token) throws -> NodeType
 
-  var tags = [String: TagParser]()
-  var filters = [String: Filter]()
+	var tags = [String: TagParser]()
+	var filters = [String: Filter]()
 
-  /// Simple initializer
-  public init() {
-  }
+	/// Simple initializer
+	public init() {
+	}
 
-  /// Registers a new template tag
-  public func registerTag(_ name: String, parser: @escaping (TokenParser, Token) throws -> NodeType) {
-    tags[name] = parser
-  }
+	/// Registers a new template tag
+	public func registerTag(_ name: String, parser: @escaping (TokenParser, Token) throws -> NodeType) {
+		tags[name] = parser
+	}
 
-  /// Registers a simple template tag with a name and a handler
-  public func registerSimpleTag(_ name: String, handler: @escaping (Context) throws -> String) {
-    registerTag(name) { _, token in
-      SimpleNode(token: token, handler: handler)
-    }
-  }
+	/// Registers a simple template tag with a name and a handler
+	public func registerSimpleTag(_ name: String, handler: @escaping (Context) throws -> String) {
+		registerTag(name) { _, token in
+			SimpleNode(token: token, handler: handler)
+		}
+	}
 
-  /// Registers boolean filter with it's negative counterpart
-  public func registerFilter(name: String, negativeFilterName: String, filter: @escaping (Any?) throws -> Bool?) {
-    // swiftlint:disable:previous discouraged_optional_boolean
-    filters[name] = .simple(filter)
-    filters[negativeFilterName] = .simple { value in
-      guard let result = try filter(value) else { return nil }
-      return !result
-    }
-  }
+	/// Registers boolean filter with it's negative counterpart
+	public func registerFilter(name: String, negativeFilterName: String, filter: @escaping (Any?) throws -> Bool?) {
+		// swiftlint:disable:previous discouraged_optional_boolean
+		filters[name] = .simple(filter)
+		filters[negativeFilterName] = .simple { value in
+			guard let result = try filter(value) else { return nil }
+			return !result
+		}
+	}
 
-  /// Registers a template filter with the given name
-  public func registerFilter(_ name: String, filter: @escaping (Any?) throws -> Any?) {
-    filters[name] = .simple(filter)
-  }
+	/// Registers a template filter with the given name
+	public func registerFilter(_ name: String, filter: @escaping (Any?) throws -> Any?) {
+		filters[name] = .simple(filter)
+	}
 
-  /// Registers a template filter with the given name
-  public func registerFilter(_ name: String, filter: @escaping (Any?, [Any?]) throws -> Any?) {
-    filters[name] = .arguments { value, args, _ in try filter(value, args) }
-  }
+	/// Registers a template filter with the given name
+	public func registerFilter(_ name: String, filter: @escaping (Any?, [Any?]) throws -> Any?) {
+		filters[name] = .arguments { value, args, _ in try filter(value, args) }
+	}
 
-  /// Registers a template filter with the given name
-  public func registerFilter(_ name: String, filter: @escaping (Any?, [Any?], Context) throws -> Any?) {
-    filters[name] = .arguments(filter)
-  }
+	/// Registers a template filter with the given name
+	public func registerFilter(_ name: String, filter: @escaping (Any?, [Any?], Context) throws -> Any?) {
+		filters[name] = .arguments(filter)
+	}
 }
 
 class DefaultExtension: Extension {
-  override init() {
-    super.init()
-    registerDefaultTags()
-    registerDefaultFilters()
-  }
+	override init() {
+		super.init()
+		registerDefaultTags()
+		registerDefaultFilters()
+	}
 
-  fileprivate func registerDefaultTags() {
-    registerTag("for", parser: ForNode.parse)
-    registerTag("break", parser: LoopTerminationNode.parse)
-    registerTag("continue", parser: LoopTerminationNode.parse)
-    registerTag("if", parser: IfNode.parse)
-    registerTag("ifnot", parser: IfNode.parse_ifnot)
-    #if !os(Linux)
-      registerTag("now", parser: NowNode.parse)
-    #endif
-    registerTag("include", parser: IncludeNode.parse)
-    registerTag("extends", parser: ExtendsNode.parse)
-    registerTag("block", parser: BlockNode.parse)
-    registerTag("filter", parser: FilterNode.parse)
-  }
+	fileprivate func registerDefaultTags() {
+		registerTag("for", parser: ForNode.parse)
+		registerTag("break", parser: LoopTerminationNode.parse)
+		registerTag("continue", parser: LoopTerminationNode.parse)
+		registerTag("if", parser: IfNode.parse)
+		registerTag("ifnot", parser: IfNode.parse_ifnot)
+		#if !os(Linux)
+			registerTag("now", parser: NowNode.parse)
+		#endif
+		registerTag("include", parser: IncludeNode.parse)
+		registerTag("extends", parser: ExtendsNode.parse)
+		registerTag("block", parser: BlockNode.parse)
+		registerTag("filter", parser: FilterNode.parse)
+	}
 
-  fileprivate func registerDefaultFilters() {
-    registerFilter("default", filter: defaultFilter)
-    registerFilter("capitalize", filter: capitalise)
-    registerFilter("uppercase", filter: uppercase)
-    registerFilter("lowercase", filter: lowercase)
-    registerFilter("join", filter: joinFilter)
-    registerFilter("split", filter: splitFilter)
-    registerFilter("indent", filter: indentFilter)
-    registerFilter("filter", filter: filterFilter)
-  }
+	fileprivate func registerDefaultFilters() {
+		registerFilter("default", filter: defaultFilter)
+		registerFilter("capitalize", filter: capitalise)
+		registerFilter("uppercase", filter: uppercase)
+		registerFilter("lowercase", filter: lowercase)
+		registerFilter("join", filter: joinFilter)
+		registerFilter("split", filter: splitFilter)
+		registerFilter("indent", filter: indentFilter)
+		registerFilter("filter", filter: filterFilter)
+	}
 }
 
 protocol FilterType {
-  func invoke(value: Any?, arguments: [Any?], context: Context) throws -> Any?
+	func invoke(value: Any?, arguments: [Any?], context: Context) throws -> Any?
 }
 
 enum Filter: FilterType {
-  case simple(((Any?) throws -> Any?))
-  case arguments(((Any?, [Any?], Context) throws -> Any?))
+	case simple(((Any?) throws -> Any?))
+	case arguments(((Any?, [Any?], Context) throws -> Any?))
 
-  func invoke(value: Any?, arguments: [Any?], context: Context) throws -> Any? {
-    switch self {
-    case let .simple(filter):
-      if !arguments.isEmpty {
-        throw TemplateSyntaxError("Can't invoke filter with an argument")
-      }
-      return try filter(value)
-    case let .arguments(filter):
-      return try filter(value, arguments, context)
-    }
-  }
+	func invoke(value: Any?, arguments: [Any?], context: Context) throws -> Any? {
+		switch self {
+		case let .simple(filter):
+			if !arguments.isEmpty {
+				throw TemplateSyntaxError("Can't invoke filter with an argument")
+			}
+			return try filter(value)
+		case let .arguments(filter):
+			return try filter(value, arguments, context)
+		}
+	}
 }

Sources/Stencil/FilterTag.swift

@@ -1,42 +1,36 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 class FilterNode: NodeType {
-  let resolvable: Resolvable
-  let nodes: [NodeType]
-  let token: Token?
+	let resolvable: Resolvable
+	let nodes: [NodeType]
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    let bits = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		let bits = token.components
 
-    guard bits.count == 2 else {
-      throw TemplateSyntaxError("'filter' tag takes one argument, the filter expression")
-    }
+		guard bits.count == 2 else {
+			throw TemplateSyntaxError("'filter' tag takes one argument, the filter expression")
+		}
 
-    let blocks = try parser.parse(until(["endfilter"]))
+		let blocks = try parser.parse(until(["endfilter"]))
 
-    guard parser.nextToken() != nil else {
-      throw TemplateSyntaxError("`endfilter` was not found.")
-    }
+		guard parser.nextToken() != nil else {
+			throw TemplateSyntaxError("`endfilter` was not found.")
+		}
 
-    let resolvable = try parser.compileFilter("filter_value|\(bits[1])", containedIn: token)
-    return FilterNode(nodes: blocks, resolvable: resolvable, token: token)
-  }
+		let resolvable = try parser.compileFilter("filter_value|\(bits[1])", containedIn: token)
+		return FilterNode(nodes: blocks, resolvable: resolvable, token: token)
+	}
 
-  init(nodes: [NodeType], resolvable: Resolvable, token: Token) {
-    self.nodes = nodes
-    self.resolvable = resolvable
-    self.token = token
-  }
+	init(nodes: [NodeType], resolvable: Resolvable, token: Token) {
+		self.nodes = nodes
+		self.resolvable = resolvable
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    let value = try renderNodes(nodes, context)
+	func render(_ context: Context) throws -> String {
+		let value = try renderNodes(nodes, context)
 
-    return try context.push(dictionary: ["filter_value": value]) {
-      try VariableNode(variable: resolvable, token: token).render(context)
-    }
-  }
+		return try context.push(dictionary: ["filter_value": value]) {
+			try VariableNode(variable: resolvable, token: token).render(context)
+		}
+	}
 }

Sources/Stencil/Filters.swift

@@ -1,139 +1,133 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 func capitalise(_ value: Any?) -> Any? {
-  if let array = value as? [Any?] {
-    return array.map { stringify($0).capitalized }
-  } else {
-    return stringify(value).capitalized
-  }
+	if let array = value as? [Any?] {
+		return array.map { stringify($0).capitalized }
+	} else {
+		return stringify(value).capitalized
+	}
 }
 
 func uppercase(_ value: Any?) -> Any? {
-  if let array = value as? [Any?] {
-    return array.map { stringify($0).uppercased() }
-  } else {
-    return stringify(value).uppercased()
-  }
+	if let array = value as? [Any?] {
+		return array.map { stringify($0).uppercased() }
+	} else {
+		return stringify(value).uppercased()
+	}
 }
 
 func lowercase(_ value: Any?) -> Any? {
-  if let array = value as? [Any?] {
-    return array.map { stringify($0).lowercased() }
-  } else {
-    return stringify(value).lowercased()
-  }
+	if let array = value as? [Any?] {
+		return array.map { stringify($0).lowercased() }
+	} else {
+		return stringify(value).lowercased()
+	}
 }
 
 func defaultFilter(value: Any?, arguments: [Any?]) -> Any? {
-  // value can be optional wrapping nil, so this way we check for underlying value
-  if let value = value, String(describing: value) != "nil" {
-    return value
-  }
+	// value can be optional wrapping nil, so this way we check for underlying value
+	if let value = value, String(describing: value) != "nil" {
+		return value
+	}
 
-  for argument in arguments {
-    if let argument = argument {
-      return argument
-    }
-  }
+	for argument in arguments {
+		if let argument = argument {
+			return argument
+		}
+	}
 
-  return nil
+	return nil
 }
 
 func joinFilter(value: Any?, arguments: [Any?]) throws -> Any? {
-  guard arguments.count < 2 else {
-    throw TemplateSyntaxError("'join' filter takes at most one argument")
-  }
+	guard arguments.count < 2 else {
+		throw TemplateSyntaxError("'join' filter takes at most one argument")
+	}
 
-  let separator = stringify(arguments.first ?? "")
+	let separator = stringify(arguments.first ?? "")
 
-  if let value = value as? [Any] {
-    return value
-      .map(stringify)
-      .joined(separator: separator)
-  }
+	if let value = value as? [Any] {
+		return value
+			.map(stringify)
+			.joined(separator: separator)
+	}
 
-  return value
+	return value
 }
 
 func splitFilter(value: Any?, arguments: [Any?]) throws -> Any? {
-  guard arguments.count < 2 else {
-    throw TemplateSyntaxError("'split' filter takes at most one argument")
-  }
+	guard arguments.count < 2 else {
+		throw TemplateSyntaxError("'split' filter takes at most one argument")
+	}
 
-  let separator = stringify(arguments.first ?? " ")
-  if let value = value as? String {
-    return value.components(separatedBy: separator)
-  }
+	let separator = stringify(arguments.first ?? " ")
+	if let value = value as? String {
+		return value.components(separatedBy: separator)
+	}
 
-  return value
+	return value
 }
 
 func indentFilter(value: Any?, arguments: [Any?]) throws -> Any? {
-  guard arguments.count <= 3 else {
-    throw TemplateSyntaxError("'indent' filter can take at most 3 arguments")
-  }
+	guard arguments.count <= 3 else {
+		throw TemplateSyntaxError("'indent' filter can take at most 3 arguments")
+	}
 
-  var indentWidth = 4
-  if !arguments.isEmpty {
-    guard let value = arguments[0] as? Int else {
-      throw TemplateSyntaxError(
-        """
-        'indent' filter width argument must be an Integer (\(String(describing: arguments[0])))
-        """
-      )
-    }
-    indentWidth = value
-  }
+	var indentWidth = 4
+	if !arguments.isEmpty {
+		guard let value = arguments[0] as? Int else {
+			throw TemplateSyntaxError(
+				"""
+				'indent' filter width argument must be an Integer (\(String(describing: arguments[0])))
+				"""
+			)
+		}
+		indentWidth = value
+	}
 
-  var indentationChar = " "
-  if arguments.count > 1 {
-    guard let value = arguments[1] as? String else {
-      throw TemplateSyntaxError(
-        """
-        'indent' filter indentation argument must be a String (\(String(describing: arguments[1]))
-        """
-      )
-    }
-    indentationChar = value
-  }
+	var indentationChar = " "
+	if arguments.count > 1 {
+		guard let value = arguments[1] as? String else {
+			throw TemplateSyntaxError(
+				"""
+				'indent' filter indentation argument must be a String (\(String(describing: arguments[1]))
+				"""
+			)
+		}
+		indentationChar = value
+	}
 
-  var indentFirst = false
-  if arguments.count > 2 {
-    guard let value = arguments[2] as? Bool else {
-      throw TemplateSyntaxError("'indent' filter indentFirst argument must be a Bool")
-    }
-    indentFirst = value
-  }
+	var indentFirst = false
+	if arguments.count > 2 {
+		guard let value = arguments[2] as? Bool else {
+			throw TemplateSyntaxError("'indent' filter indentFirst argument must be a Bool")
+		}
+		indentFirst = value
+	}
 
-  let indentation = [String](repeating: indentationChar, count: indentWidth).joined()
-  return indent(stringify(value), indentation: indentation, indentFirst: indentFirst)
+	let indentation = [String](repeating: indentationChar, count: indentWidth).joined()
+	return indent(stringify(value), indentation: indentation, indentFirst: indentFirst)
 }
 
 func indent(_ content: String, indentation: String, indentFirst: Bool) -> String {
-  guard !indentation.isEmpty else { return content }
+	guard !indentation.isEmpty else { return content }
 
-  var lines = content.components(separatedBy: .newlines)
-  let firstLine = (indentFirst ? indentation : "") + lines.removeFirst()
-  let result = lines.reduce(into: [firstLine]) { result, line in
-    result.append(line.isEmpty ? "" : "\(indentation)\(line)")
-  }
-  return result.joined(separator: "\n")
+	var lines = content.components(separatedBy: .newlines)
+	let firstLine = (indentFirst ? indentation : "") + lines.removeFirst()
+	let result = lines.reduce(into: [firstLine]) { result, line in
+		result.append(line.isEmpty ? "" : "\(indentation)\(line)")
+	}
+	return result.joined(separator: "\n")
 }
 
 func filterFilter(value: Any?, arguments: [Any?], context: Context) throws -> Any? {
-  guard let value = value else { return nil }
-  guard arguments.count == 1 else {
-    throw TemplateSyntaxError("'filter' filter takes one argument")
-  }
+	guard let value = value else { return nil }
+	guard arguments.count == 1 else {
+		throw TemplateSyntaxError("'filter' filter takes one argument")
+	}
 
-  let attribute = stringify(arguments[0])
+	let attribute = stringify(arguments[0])
 
-  let expr = try context.environment.compileFilter("$0|\(attribute)")
-  return try context.push(dictionary: ["$0": value]) {
-    try expr.resolve(context)
-  }
+	let expr = try context.environment.compileFilter("$0|\(attribute)")
+	return try context.push(dictionary: ["$0": value]) {
+		try expr.resolve(context)
+	}
 }

Sources/Stencil/ForTag.swift

@@ -1,280 +1,274 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 class ForNode: NodeType {
-  let resolvable: Resolvable
-  let loopVariables: [String]
-  let nodes: [NodeType]
-  let emptyNodes: [NodeType]
-  let `where`: Expression?
-  let label: String?
-  let token: Token?
+	let resolvable: Resolvable
+	let loopVariables: [String]
+	let nodes: [NodeType]
+	let emptyNodes: [NodeType]
+	let `where`: Expression?
+	let label: String?
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    var components = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		var components = token.components
 
-    var label: String?
-    if components.first?.hasSuffix(":") == true {
-      label = String(components.removeFirst().dropLast())
-    }
+		var label: String?
+		if components.first?.hasSuffix(":") == true {
+			label = String(components.removeFirst().dropLast())
+		}
 
-    func hasToken(_ token: String, at index: Int) -> Bool {
-      components.count > (index + 1) && components[index] == token
-    }
+		func hasToken(_ token: String, at index: Int) -> Bool {
+			components.count > (index + 1) && components[index] == token
+		}
 
-    func endsOrHasToken(_ token: String, at index: Int) -> Bool {
-      components.count == index || hasToken(token, at: index)
-    }
+		func endsOrHasToken(_ token: String, at index: Int) -> Bool {
+			components.count == index || hasToken(token, at: index)
+		}
 
-    guard hasToken("in", at: 2) && endsOrHasToken("where", at: 4) else {
-      throw TemplateSyntaxError("'for' statements should use the syntax: `for <x> in <y> [where <condition>]`.")
-    }
+		guard hasToken("in", at: 2) && endsOrHasToken("where", at: 4) else {
+			throw TemplateSyntaxError("'for' statements should use the syntax: `for <x> in <y> [where <condition>]`.")
+		}
 
-    let loopVariables = components[1]
-      .split(separator: ",")
-      .map(String.init)
-      .map { $0.trim(character: " ") }
+		let loopVariables = components[1]
+			.split(separator: ",")
+			.map(String.init)
+			.map { $0.trim(character: " ") }
 
-    let resolvable = try parser.compileResolvable(components[3], containedIn: token)
+		let resolvable = try parser.compileResolvable(components[3], containedIn: token)
 
-    let `where` = hasToken("where", at: 4)
-      ? try parser.compileExpression(components: Array(components.suffix(from: 5)), token: token)
-      : nil
+		let `where` = hasToken("where", at: 4)
+			? try parser.compileExpression(components: Array(components.suffix(from: 5)), token: token)
+			: nil
 
-    let forNodes = try parser.parse(until(["endfor", "empty"]))
+		let forNodes = try parser.parse(until(["endfor", "empty"]))
 
-    guard let token = parser.nextToken() else {
-      throw TemplateSyntaxError("`endfor` was not found.")
-    }
+		guard let token = parser.nextToken() else {
+			throw TemplateSyntaxError("`endfor` was not found.")
+		}
 
-    var emptyNodes = [NodeType]()
-    if token.contents == "empty" {
-      emptyNodes = try parser.parse(until(["endfor"]))
-      _ = parser.nextToken()
-    }
+		var emptyNodes = [NodeType]()
+		if token.contents == "empty" {
+			emptyNodes = try parser.parse(until(["endfor"]))
+			_ = parser.nextToken()
+		}
 
-    return ForNode(
-      resolvable: resolvable,
-      loopVariables: loopVariables,
-      nodes: forNodes,
-      emptyNodes: emptyNodes,
-      where: `where`,
-      label: label,
-      token: token
-    )
-  }
+		return ForNode(
+			resolvable: resolvable,
+			loopVariables: loopVariables,
+			nodes: forNodes,
+			emptyNodes: emptyNodes,
+			where: `where`,
+			label: label,
+			token: token
+		)
+	}
 
-  init(
-    resolvable: Resolvable,
-    loopVariables: [String],
-    nodes: [NodeType],
-    emptyNodes: [NodeType],
-    where: Expression? = nil,
-    label: String? = nil,
-    token: Token? = nil
-  ) {
-    self.resolvable = resolvable
-    self.loopVariables = loopVariables
-    self.nodes = nodes
-    self.emptyNodes = emptyNodes
-    self.where = `where`
-    self.label = label
-    self.token = token
-  }
+	init(
+		resolvable: Resolvable,
+		loopVariables: [String],
+		nodes: [NodeType],
+		emptyNodes: [NodeType],
+		where: Expression? = nil,
+		label: String? = nil,
+		token: Token? = nil
+	) {
+		self.resolvable = resolvable
+		self.loopVariables = loopVariables
+		self.nodes = nodes
+		self.emptyNodes = emptyNodes
+		self.where = `where`
+		self.label = label
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    var values = try resolve(context)
+	func render(_ context: Context) throws -> String {
+		var values = try resolve(context)
 
-    if let `where` = self.where {
-      values = try values.filter { item -> Bool in
-        try push(value: item, context: context) {
-          try `where`.evaluate(context: context)
-        }
-      }
-    }
+		if let `where` = self.where {
+			values = try values.filter { item -> Bool in
+				try push(value: item, context: context) {
+					try `where`.evaluate(context: context)
+				}
+			}
+		}
 
-    if !values.isEmpty {
-      let count = values.count
-      var result = ""
+		if !values.isEmpty {
+			let count = values.count
+			var result = ""
 
-      // collect parent loop contexts
-      let parentLoopContexts = (context["forloop"] as? [String: Any])?
-        .filter { ($1 as? [String: Any])?["label"] != nil } ?? [:]
+			// collect parent loop contexts
+			let parentLoopContexts = (context["forloop"] as? [String: Any])?
+				.filter { ($1 as? [String: Any])?["label"] != nil } ?? [:]
 
-      for (index, item) in zip(0..., values) {
-        var forContext: [String: Any] = [
-          "first": index == 0,
-          "last": index == (count - 1),
-          "counter": index + 1,
-          "counter0": index,
-          "length": count
-        ]
-        if let label = label {
-          forContext["label"] = label
-          forContext[label] = forContext
-        }
-        forContext.merge(parentLoopContexts) { lhs, _ in lhs }
+			for (index, item) in zip(0..., values) {
+				var forContext: [String: Any] = [
+					"first": index == 0,
+					"last": index == (count - 1),
+					"counter": index + 1,
+					"counter0": index,
+					"length": count
+				]
+				if let label = label {
+					forContext["label"] = label
+					forContext[label] = forContext
+				}
+				forContext.merge(parentLoopContexts) { lhs, _ in lhs }
 
-        var shouldBreak = false
-        result += try context.push(dictionary: ["forloop": forContext]) {
-          defer {
-            // if outer loop should be continued we should break from current loop
-            if let shouldContinueLabel = context[LoopTerminationNode.continueContextKey] as? String {
-              shouldBreak = shouldContinueLabel != label || label == nil
-            } else {
-              shouldBreak = context[LoopTerminationNode.breakContextKey] != nil
-            }
-          }
-          return try push(value: item, context: context) {
-            try renderNodes(nodes, context)
-          }
-        }
+				var shouldBreak = false
+				result += try context.push(dictionary: ["forloop": forContext]) {
+					defer {
+						// if outer loop should be continued we should break from current loop
+						if let shouldContinueLabel = context[LoopTerminationNode.continueContextKey] as? String {
+							shouldBreak = shouldContinueLabel != label || label == nil
+						} else {
+							shouldBreak = context[LoopTerminationNode.breakContextKey] != nil
+						}
+					}
+					return try push(value: item, context: context) {
+						try renderNodes(nodes, context)
+					}
+				}
 
-        if shouldBreak {
-          break
-        }
-      }
+				if shouldBreak {
+					break
+				}
+			}
 
-      return result
-    } else {
-      return try context.push {
-        try renderNodes(emptyNodes, context)
-      }
-    }
-  }
+			return result
+		} else {
+			return try context.push {
+				try renderNodes(emptyNodes, context)
+			}
+		}
+	}
 
-  private func push<Result>(value: Any, context: Context, closure: () throws -> (Result)) throws -> Result {
-    if loopVariables.isEmpty {
-      return try context.push {
-        try closure()
-      }
-    }
+	private func push<Result>(value: Any, context: Context, closure: () throws -> (Result)) throws -> Result {
+		if loopVariables.isEmpty {
+			return try context.push {
+				try closure()
+			}
+		}
 
-    let valueMirror = Mirror(reflecting: value)
-    if case .tuple? = valueMirror.displayStyle {
-      if loopVariables.count > Int(valueMirror.children.count) {
-        throw TemplateSyntaxError("Tuple '\(value)' has less values than loop variables")
-      }
-      var variablesContext = [String: Any]()
-      valueMirror.children.prefix(loopVariables.count).enumerated().forEach { offset, element in
-        if loopVariables[offset] != "_" {
-          variablesContext[loopVariables[offset]] = element.value
-        }
-      }
+		let valueMirror = Mirror(reflecting: value)
+		if case .tuple? = valueMirror.displayStyle {
+			if loopVariables.count > Int(valueMirror.children.count) {
+				throw TemplateSyntaxError("Tuple '\(value)' has less values than loop variables")
+			}
+			var variablesContext = [String: Any]()
+			valueMirror.children.prefix(loopVariables.count).enumerated().forEach { offset, element in
+				if loopVariables[offset] != "_" {
+					variablesContext[loopVariables[offset]] = element.value
+				}
+			}
 
-      return try context.push(dictionary: variablesContext) {
-        try closure()
-      }
-    }
+			return try context.push(dictionary: variablesContext) {
+				try closure()
+			}
+		}
 
-    return try context.push(dictionary: [loopVariables.first ?? "": value]) {
-      try closure()
-    }
-  }
+		return try context.push(dictionary: [loopVariables.first ?? "": value]) {
+			try closure()
+		}
+	}
 
-  private func resolve(_ context: Context) throws -> [Any] {
-    let resolved = try resolvable.resolve(context)
+	private func resolve(_ context: Context) throws -> [Any] {
+		let resolved = try resolvable.resolve(context)
 
-    var values: [Any]
-    if let dictionary = resolved as? [String: Any], !dictionary.isEmpty {
-      values = dictionary.sorted { $0.key < $1.key }
-    } else if let array = resolved as? [Any] {
-      values = array
-    } else if let range = resolved as? CountableClosedRange<Int> {
-      values = Array(range)
-    } else if let range = resolved as? CountableRange<Int> {
-      values = Array(range)
-    } else if let resolved = resolved {
-      let mirror = Mirror(reflecting: resolved)
-      switch mirror.displayStyle {
-      case .struct, .tuple:
-        values = Array(mirror.children)
-      case .class:
-        var children = Array(mirror.children)
-        var currentMirror: Mirror? = mirror
-        while let superclassMirror = currentMirror?.superclassMirror {
-          children.append(contentsOf: superclassMirror.children)
-          currentMirror = superclassMirror
-        }
-        values = Array(children)
-      default:
-        values = []
-      }
-    } else {
-      values = []
-    }
+		var values: [Any]
+		if let dictionary = resolved as? [String: Any], !dictionary.isEmpty {
+			values = dictionary.sorted { $0.key < $1.key }
+		} else if let array = resolved as? [Any] {
+			values = array
+		} else if let range = resolved as? CountableClosedRange<Int> {
+			values = Array(range)
+		} else if let range = resolved as? CountableRange<Int> {
+			values = Array(range)
+		} else if let resolved = resolved {
+			let mirror = Mirror(reflecting: resolved)
+			switch mirror.displayStyle {
+			case .struct, .tuple:
+				values = Array(mirror.children)
+			case .class:
+				var children = Array(mirror.children)
+				var currentMirror: Mirror? = mirror
+				while let superclassMirror = currentMirror?.superclassMirror {
+					children.append(contentsOf: superclassMirror.children)
+					currentMirror = superclassMirror
+				}
+				values = Array(children)
+			default:
+				values = []
+			}
+		} else {
+			values = []
+		}
 
-    return values
-  }
+		return values
+	}
 }
 
 struct LoopTerminationNode: NodeType {
-  static let breakContextKey = "_internal_forloop_break"
-  static let continueContextKey = "_internal_forloop_continue"
+	static let breakContextKey = "_internal_forloop_break"
+	static let continueContextKey = "_internal_forloop_continue"
 
-  let name: String
-  let label: String?
-  let token: Token?
+	let name: String
+	let label: String?
+	let token: Token?
 
-  var contextKey: String {
-    "_internal_forloop_\(name)"
-  }
+	var contextKey: String {
+		"_internal_forloop_\(name)"
+	}
 
-  private init(name: String, label: String? = nil, token: Token? = nil) {
-    self.name = name
-    self.label = label
-    self.token = token
-  }
+	private init(name: String, label: String? = nil, token: Token? = nil) {
+		self.name = name
+		self.label = label
+		self.token = token
+	}
 
-  static func parse(_ parser: TokenParser, token: Token) throws -> LoopTerminationNode {
-    let components = token.components
+	static func parse(_ parser: TokenParser, token: Token) throws -> Self {
+		let components = token.components
 
-    guard components.count <= 2 else {
-      throw TemplateSyntaxError("'\(token.contents)' can accept only one parameter")
-    }
-    guard parser.hasOpenedForTag() else {
-      throw TemplateSyntaxError("'\(token.contents)' can be used only inside loop body")
-    }
+		guard components.count <= 2 else {
+			throw TemplateSyntaxError("'\(token.contents)' can accept only one parameter")
+		}
+		guard parser.hasOpenedForTag() else {
+			throw TemplateSyntaxError("'\(token.contents)' can be used only inside loop body")
+		}
 
-    return LoopTerminationNode(name: components[0], label: components.count == 2 ? components[1] : nil, token: token)
-  }
+		return Self(name: components[0], label: components.count == 2 ? components[1] : nil, token: token)
+	}
 
-  func render(_ context: Context) throws -> String {
-    let offset = zip(0..., context.dictionaries).reversed().first { _, dictionary in
-      guard let forContext = dictionary["forloop"] as? [String: Any],
-        dictionary["forloop"] != nil else { return false }
+	func render(_ context: Context) throws -> String {
+		let offset = zip(0..., context.dictionaries).reversed().first { _, dictionary in
+			guard let forContext = dictionary["forloop"] as? [String: Any],
+				dictionary["forloop"] != nil else { return false }
 
-      if let label = label {
-        return label == forContext["label"] as? String
-      } else {
-        return true
-      }
-    }?.0
+			if let label = label {
+				return label == forContext["label"] as? String
+			} else {
+				return true
+			}
+		}?.0
 
-    if let offset = offset {
-      context.dictionaries[offset][contextKey] = label ?? true
-    } else if let label = label {
-      throw TemplateSyntaxError("No loop labeled '\(label)' is currently running")
-    } else {
-      throw TemplateSyntaxError("No loop is currently running")
-    }
+		if let offset = offset {
+			context.dictionaries[offset][contextKey] = label ?? true
+		} else if let label = label {
+			throw TemplateSyntaxError("No loop labeled '\(label)' is currently running")
+		} else {
+			throw TemplateSyntaxError("No loop is currently running")
+		}
 
-    return ""
-  }
+		return ""
+	}
 }
 
 private extension TokenParser {
-  func hasOpenedForTag() -> Bool {
-    var openForCount = 0
-    for parsedToken in parsedTokens.reversed() where parsedToken.kind == .block {
-      if parsedToken.components.first == "endfor" { openForCount -= 1 }
-      if parsedToken.components.first == "for" { openForCount += 1 }
-    }
-    return openForCount > 0
-  }
+	func hasOpenedForTag() -> Bool {
+		var openForCount = 0
+		for parsedToken in parsedTokens.reversed() where parsedToken.kind == .block {
+			if parsedToken.components.first == "endfor" { openForCount -= 1 }
+			if parsedToken.components.first == "for" { openForCount += 1 }
+		}
+		return openForCount > 0
+	}
 }

Sources/Stencil/IfTag.swift

@@ -1,319 +1,314 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 enum Operator {
-  case infix(String, Int, InfixOperator.Type)
-  case prefix(String, Int, PrefixOperator.Type)
+	case infix(String, Int, InfixOperator.Type)
+	case prefix(String, Int, PrefixOperator.Type)
 
-  var name: String {
-    switch self {
-    case .infix(let name, _, _):
-      return name
-    case .prefix(let name, _, _):
-      return name
-    }
-  }
+	var name: String {
+		switch self {
+		case .infix(let name, _, _):
+			return name
+		case .prefix(let name, _, _):
+			return name
+		}
+	}
 
-  static let all: [Operator] = [
-    .infix("in", 5, InExpression.self),
-    .infix("or", 6, OrExpression.self),
-    .infix("and", 7, AndExpression.self),
-    .prefix("not", 8, NotExpression.self),
-    .infix("==", 10, EqualityExpression.self),
-    .infix("!=", 10, InequalityExpression.self),
-    .infix(">", 10, MoreThanExpression.self),
-    .infix(">=", 10, MoreThanEqualExpression.self),
-    .infix("<", 10, LessThanExpression.self),
-    .infix("<=", 10, LessThanEqualExpression.self)
-  ]
+	static let all: [Self] = [
+		.infix("in", 5, InExpression.self),
+		.infix("or", 6, OrExpression.self),
+		.infix("and", 7, AndExpression.self),
+		.prefix("not", 8, NotExpression.self),
+		.infix("==", 10, EqualityExpression.self),
+		.infix("!=", 10, InequalityExpression.self),
+		.infix(">", 10, MoreThanExpression.self),
+		.infix(">=", 10, MoreThanEqualExpression.self),
+		.infix("<", 10, LessThanExpression.self),
+		.infix("<=", 10, LessThanEqualExpression.self)
+	]
 }
 
 func findOperator(name: String) -> Operator? {
-  for `operator` in Operator.all where `operator`.name == name {
-    return `operator`
-  }
+	for `operator` in Operator.all where `operator`.name == name {
+		return `operator`
+	}
 
-  return nil
+	return nil
 }
 
 indirect enum IfToken {
-  case infix(name: String, bindingPower: Int, operatorType: InfixOperator.Type)
-  case prefix(name: String, bindingPower: Int, operatorType: PrefixOperator.Type)
-  case variable(Resolvable)
-  case subExpression(Expression)
-  case end
+	case infix(name: String, bindingPower: Int, operatorType: InfixOperator.Type)
+	case prefix(name: String, bindingPower: Int, operatorType: PrefixOperator.Type)
+	case variable(Resolvable)
+	case subExpression(Expression)
+	case end
 
-  var bindingPower: Int {
-    switch self {
-    case .infix(_, let bindingPower, _):
-      return bindingPower
-    case .prefix(_, let bindingPower, _):
-      return bindingPower
-    case .variable:
-      return 0
-    case .subExpression:
-      return 0
-    case .end:
-      return 0
-    }
-  }
+	var bindingPower: Int {
+		switch self {
+		case .infix(_, let bindingPower, _):
+			return bindingPower
+		case .prefix(_, let bindingPower, _):
+			return bindingPower
+		case .variable:
+			return 0
+		case .subExpression:
+			return 0
+		case .end:
+			return 0
+		}
+	}
 
-  func nullDenotation(parser: IfExpressionParser) throws -> Expression {
-    switch self {
-    case .infix(let name, _, _):
-      throw TemplateSyntaxError("'if' expression error: infix operator '\(name)' doesn't have a left hand side")
-    case .prefix(_, let bindingPower, let operatorType):
-      let expression = try parser.expression(bindingPower: bindingPower)
-      return operatorType.init(expression: expression)
-    case .variable(let variable):
-      return VariableExpression(variable: variable)
-    case .subExpression(let expression):
-      return expression
-    case .end:
-      throw TemplateSyntaxError("'if' expression error: end")
-    }
-  }
+	func nullDenotation(parser: IfExpressionParser) throws -> Expression {
+		switch self {
+		case .infix(let name, _, _):
+			throw TemplateSyntaxError("'if' expression error: infix operator '\(name)' doesn't have a left hand side")
+		case .prefix(_, let bindingPower, let operatorType):
+			let expression = try parser.expression(bindingPower: bindingPower)
+			return operatorType.init(expression: expression)
+		case .variable(let variable):
+			return VariableExpression(variable: variable)
+		case .subExpression(let expression):
+			return expression
+		case .end:
+			throw TemplateSyntaxError("'if' expression error: end")
+		}
+	}
 
-  func leftDenotation(left: Expression, parser: IfExpressionParser) throws -> Expression {
-    switch self {
-    case .infix(_, let bindingPower, let operatorType):
-      let right = try parser.expression(bindingPower: bindingPower)
-      return operatorType.init(lhs: left, rhs: right)
-    case .prefix(let name, _, _):
-      throw TemplateSyntaxError("'if' expression error: prefix operator '\(name)' was called with a left hand side")
-    case .variable(let variable):
-      throw TemplateSyntaxError("'if' expression error: variable '\(variable)' was called with a left hand side")
-    case .subExpression:
-      throw TemplateSyntaxError("'if' expression error: sub expression was called with a left hand side")
-    case .end:
-      throw TemplateSyntaxError("'if' expression error: end")
-    }
-  }
+	func leftDenotation(left: Expression, parser: IfExpressionParser) throws -> Expression {
+		switch self {
+		case .infix(_, let bindingPower, let operatorType):
+			let right = try parser.expression(bindingPower: bindingPower)
+			return operatorType.init(lhs: left, rhs: right)
+		case .prefix(let name, _, _):
+			throw TemplateSyntaxError("'if' expression error: prefix operator '\(name)' was called with a left hand side")
+		case .variable(let variable):
+			throw TemplateSyntaxError("'if' expression error: variable '\(variable)' was called with a left hand side")
+		case .subExpression:
+			throw TemplateSyntaxError("'if' expression error: sub expression was called with a left hand side")
+		case .end:
+			throw TemplateSyntaxError("'if' expression error: end")
+		}
+	}
 
-  var isEnd: Bool {
-    switch self {
-    case .end:
-      return true
-    default:
-      return false
-    }
-  }
+	var isEnd: Bool {
+		switch self {
+		case .end:
+			return true
+		default:
+			return false
+		}
+	}
 }
 
 final class IfExpressionParser {
-  let tokens: [IfToken]
-  var position: Int = 0
+	let tokens: [IfToken]
+	var position: Int = 0
 
-  private init(tokens: [IfToken]) {
-    self.tokens = tokens
-  }
+	private init(tokens: [IfToken]) {
+		self.tokens = tokens
+	}
 
-  static func parser(components: [String], environment: Environment, token: Token) throws -> IfExpressionParser {
-    try IfExpressionParser(components: ArraySlice(components), environment: environment, token: token)
-  }
+	static func parser(components: [String], environment: Environment, token: Token) throws -> IfExpressionParser {
+		try IfExpressionParser(components: ArraySlice(components), environment: environment, token: token)
+	}
 
-  private init(components: ArraySlice<String>, environment: Environment, token: Token) throws {
-    var parsedComponents = Set<Int>()
-    var bracketsBalance = 0
-    self.tokens = try zip(components.indices, components).compactMap { index, component in
-      guard !parsedComponents.contains(index) else { return nil }
+	private init(components: ArraySlice<String>, environment: Environment, token: Token) throws {
+		var parsedComponents = Set<Int>()
+		var bracketsBalance = 0
+		// swiftlint:disable:next closure_body_length
+		self.tokens = try zip(components.indices, components).compactMap { index, component in
+			guard !parsedComponents.contains(index) else { return nil }
 
-      if component == "(" {
-        bracketsBalance += 1
-        let (expression, parsedCount) = try Self.subExpression(
-          from: components.suffix(from: index + 1),
-          environment: environment,
-          token: token
-        )
-        parsedComponents.formUnion(Set(index...(index + parsedCount)))
-        return .subExpression(expression)
-      } else if component == ")" {
-        bracketsBalance -= 1
-        if bracketsBalance < 0 {
-          throw TemplateSyntaxError("'if' expression error: missing opening bracket")
-        }
-        parsedComponents.insert(index)
-        return nil
-      } else {
-        parsedComponents.insert(index)
-        if let `operator` = findOperator(name: component) {
-          switch `operator` {
-          case .infix(let name, let bindingPower, let operatorType):
-            return .infix(name: name, bindingPower: bindingPower, operatorType: operatorType)
-          case .prefix(let name, let bindingPower, let operatorType):
-            return .prefix(name: name, bindingPower: bindingPower, operatorType: operatorType)
-          }
-        }
-        return .variable(try environment.compileResolvable(component, containedIn: token))
-      }
-    }
-  }
+			if component == "(" {
+				bracketsBalance += 1
+				let (expression, parsedCount) = try Self.subExpression(
+					from: components.suffix(from: index + 1),
+					environment: environment,
+					token: token
+				)
+				parsedComponents.formUnion(Set(index...(index + parsedCount)))
+				return .subExpression(expression)
+			} else if component == ")" {
+				bracketsBalance -= 1
+				if bracketsBalance < 0 {
+					throw TemplateSyntaxError("'if' expression error: missing opening bracket")
+				}
+				parsedComponents.insert(index)
+				return nil
+			} else {
+				parsedComponents.insert(index)
+				if let `operator` = findOperator(name: component) {
+					switch `operator` {
+					case .infix(let name, let bindingPower, let operatorType):
+						return .infix(name: name, bindingPower: bindingPower, operatorType: operatorType)
+					case .prefix(let name, let bindingPower, let operatorType):
+						return .prefix(name: name, bindingPower: bindingPower, operatorType: operatorType)
+					}
+				}
+				return .variable(try environment.compileResolvable(component, containedIn: token))
+			}
+		}
+	}
 
-  private static func subExpression(
-    from components: ArraySlice<String>,
-    environment: Environment,
-    token: Token
-  ) throws -> (Expression, Int) {
-    var bracketsBalance = 1
-    let subComponents = components.prefix { component in
-      if component == "(" {
-        bracketsBalance += 1
-      } else if component == ")" {
-        bracketsBalance -= 1
-      }
-      return bracketsBalance != 0
-    }
-    if bracketsBalance > 0 {
-      throw TemplateSyntaxError("'if' expression error: missing closing bracket")
-    }
+	private static func subExpression(
+		from components: ArraySlice<String>,
+		environment: Environment,
+		token: Token
+	) throws -> (Expression, Int) {
+		var bracketsBalance = 1
+		let subComponents = components.prefix { component in
+			if component == "(" {
+				bracketsBalance += 1
+			} else if component == ")" {
+				bracketsBalance -= 1
+			}
+			return bracketsBalance != 0
+		}
+		if bracketsBalance > 0 {
+			throw TemplateSyntaxError("'if' expression error: missing closing bracket")
+		}
 
-    let expressionParser = try IfExpressionParser(components: subComponents, environment: environment, token: token)
-    let expression = try expressionParser.parse()
-    return (expression, subComponents.count)
-  }
+		let expressionParser = try IfExpressionParser(components: subComponents, environment: environment, token: token)
+		let expression = try expressionParser.parse()
+		return (expression, subComponents.count)
+	}
 
-  var currentToken: IfToken {
-    if tokens.count > position {
-      return tokens[position]
-    }
+	var currentToken: IfToken {
+		if tokens.count > position {
+			return tokens[position]
+		}
 
-    return .end
-  }
+		return .end
+	}
 
-  var nextToken: IfToken {
-    position += 1
-    return currentToken
-  }
+	var nextToken: IfToken {
+		position += 1
+		return currentToken
+	}
 
-  func parse() throws -> Expression {
-    let expression = try self.expression()
+	func parse() throws -> Expression {
+		let expression = try self.expression()
 
-    if !currentToken.isEnd {
-      throw TemplateSyntaxError("'if' expression error: dangling token")
-    }
+		if !currentToken.isEnd {
+			throw TemplateSyntaxError("'if' expression error: dangling token")
+		}
 
-    return expression
-  }
+		return expression
+	}
 
-  func expression(bindingPower: Int = 0) throws -> Expression {
-    var token = currentToken
-    position += 1
+	func expression(bindingPower: Int = 0) throws -> Expression {
+		var token = currentToken
+		position += 1
 
-    var left = try token.nullDenotation(parser: self)
+		var left = try token.nullDenotation(parser: self)
 
-    while bindingPower < currentToken.bindingPower {
-      token = currentToken
-      position += 1
-      left = try token.leftDenotation(left: left, parser: self)
-    }
+		while bindingPower < currentToken.bindingPower {
+			token = currentToken
+			position += 1
+			left = try token.leftDenotation(left: left, parser: self)
+		}
 
-    return left
-  }
+		return left
+	}
 }
 
 /// Represents an if condition and the associated nodes when the condition
 /// evaluates
 final class IfCondition {
-  let expression: Expression?
-  let nodes: [NodeType]
+	let expression: Expression?
+	let nodes: [NodeType]
 
-  init(expression: Expression?, nodes: [NodeType]) {
-    self.expression = expression
-    self.nodes = nodes
-  }
+	init(expression: Expression?, nodes: [NodeType]) {
+		self.expression = expression
+		self.nodes = nodes
+	}
 
-  func render(_ context: Context) throws -> String {
-    try context.push {
-      try renderNodes(nodes, context)
-    }
-  }
+	func render(_ context: Context) throws -> String {
+		try context.push {
+			try renderNodes(nodes, context)
+		}
+	}
 }
 
 class IfNode: NodeType {
-  let conditions: [IfCondition]
-  let token: Token?
+	let conditions: [IfCondition]
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    var components = token.components
-    components.removeFirst()
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		var components = token.components
+		components.removeFirst()
 
-    let expression = try parser.compileExpression(components: components, token: token)
-    let nodes = try parser.parse(until(["endif", "elif", "else"]))
-    var conditions: [IfCondition] = [
-      IfCondition(expression: expression, nodes: nodes)
-    ]
+		let expression = try parser.compileExpression(components: components, token: token)
+		let nodes = try parser.parse(until(["endif", "elif", "else"]))
+		var conditions: [IfCondition] = [
+			IfCondition(expression: expression, nodes: nodes)
+		]
 
-    var nextToken = parser.nextToken()
-    while let current = nextToken, current.contents.hasPrefix("elif") {
-      var components = current.components
-      components.removeFirst()
-      let expression = try parser.compileExpression(components: components, token: current)
+		var nextToken = parser.nextToken()
+		while let current = nextToken, current.contents.hasPrefix("elif") {
+			var components = current.components
+			components.removeFirst()
+			let expression = try parser.compileExpression(components: components, token: current)
 
-      let nodes = try parser.parse(until(["endif", "elif", "else"]))
-      nextToken = parser.nextToken()
-      conditions.append(IfCondition(expression: expression, nodes: nodes))
-    }
+			let nodes = try parser.parse(until(["endif", "elif", "else"]))
+			nextToken = parser.nextToken()
+			conditions.append(IfCondition(expression: expression, nodes: nodes))
+		}
 
-    if let current = nextToken, current.contents == "else" {
-      conditions.append(IfCondition(expression: nil, nodes: try parser.parse(until(["endif"]))))
-      nextToken = parser.nextToken()
-    }
+		if let current = nextToken, current.contents == "else" {
+			conditions.append(IfCondition(expression: nil, nodes: try parser.parse(until(["endif"]))))
+			nextToken = parser.nextToken()
+		}
 
-    guard let current = nextToken, current.contents == "endif" else {
-      throw TemplateSyntaxError("`endif` was not found.")
-    }
+		guard let current = nextToken, current.contents == "endif" else {
+			throw TemplateSyntaxError("`endif` was not found.")
+		}
 
-    return IfNode(conditions: conditions, token: token)
-  }
+		return IfNode(conditions: conditions, token: token)
+	}
 
-  class func parse_ifnot(_ parser: TokenParser, token: Token) throws -> NodeType {
-    var components = token.components
-    guard components.count == 2 else {
-      throw TemplateSyntaxError("'ifnot' statements should use the following syntax 'ifnot condition'.")
-    }
-    components.removeFirst()
-    var trueNodes = [NodeType]()
-    var falseNodes = [NodeType]()
+	class func parse_ifnot(_ parser: TokenParser, token: Token) throws -> NodeType {
+		var components = token.components
+		guard components.count == 2 else {
+			throw TemplateSyntaxError("'ifnot' statements should use the following syntax 'ifnot condition'.")
+		}
+		components.removeFirst()
+		var trueNodes = [NodeType]()
+		var falseNodes = [NodeType]()
 
-    let expression = try parser.compileExpression(components: components, token: token)
-    falseNodes = try parser.parse(until(["endif", "else"]))
+		let expression = try parser.compileExpression(components: components, token: token)
+		falseNodes = try parser.parse(until(["endif", "else"]))
 
-    guard let token = parser.nextToken() else {
-      throw TemplateSyntaxError("`endif` was not found.")
-    }
+		guard let token = parser.nextToken() else {
+			throw TemplateSyntaxError("`endif` was not found.")
+		}
 
-    if token.contents == "else" {
-      trueNodes = try parser.parse(until(["endif"]))
-      _ = parser.nextToken()
-    }
+		if token.contents == "else" {
+			trueNodes = try parser.parse(until(["endif"]))
+			_ = parser.nextToken()
+		}
 
-    return IfNode(conditions: [
-      IfCondition(expression: expression, nodes: trueNodes),
-      IfCondition(expression: nil, nodes: falseNodes)
-    ], token: token)
-  }
+		return IfNode(conditions: [
+			IfCondition(expression: expression, nodes: trueNodes),
+			IfCondition(expression: nil, nodes: falseNodes)
+		], token: token)
+	}
 
-  init(conditions: [IfCondition], token: Token? = nil) {
-    self.conditions = conditions
-    self.token = token
-  }
+	init(conditions: [IfCondition], token: Token? = nil) {
+		self.conditions = conditions
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    for condition in conditions {
-      if let expression = condition.expression {
-        let truthy = try expression.evaluate(context: context)
+	func render(_ context: Context) throws -> String {
+		for condition in conditions {
+			if let expression = condition.expression {
+				let truthy = try expression.evaluate(context: context)
 
-        if truthy {
-          return try condition.render(context)
-        }
-      } else {
-        return try condition.render(context)
-      }
-    }
+				if truthy {
+					return try condition.render(context)
+				}
+			} else {
+				return try condition.render(context)
+			}
+		}
 
-    return ""
-  }
+		return ""
+	}
 }

Sources/Stencil/Include.swift

@@ -1,56 +1,48 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
-import PathKit
-
 class IncludeNode: NodeType {
-  let templateName: Variable
-  let includeContext: String?
-  let token: Token?
+	let templateName: Variable
+	let includeContext: String?
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    let bits = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		let bits = token.components
 
-    guard bits.count == 2 || bits.count == 3 else {
-      throw TemplateSyntaxError(
-        """
-        'include' tag requires one argument, the template file to be included. \
-        A second optional argument can be used to specify the context that will \
-        be passed to the included file
-        """
-      )
-    }
+		guard bits.count == 2 || bits.count == 3 else {
+			throw TemplateSyntaxError(
+				"""
+				'include' tag requires one argument, the template file to be included. \
+				A second optional argument can be used to specify the context that will \
+				be passed to the included file
+				"""
+			)
+		}
 
-    return IncludeNode(templateName: Variable(bits[1]), includeContext: bits.count == 3 ? bits[2] : nil, token: token)
-  }
+		return IncludeNode(templateName: Variable(bits[1]), includeContext: bits.count == 3 ? bits[2] : nil, token: token)
+	}
 
-  init(templateName: Variable, includeContext: String? = nil, token: Token) {
-    self.templateName = templateName
-    self.includeContext = includeContext
-    self.token = token
-  }
+	init(templateName: Variable, includeContext: String? = nil, token: Token) {
+		self.templateName = templateName
+		self.includeContext = includeContext
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    guard let templateName = try self.templateName.resolve(context) as? String else {
-      throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
-    }
+	func render(_ context: Context) throws -> String {
+		guard let templateName = try self.templateName.resolve(context) as? String else {
+			throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
+		}
 
-    let template = try context.environment.loadTemplate(name: templateName)
+		let template = try context.environment.loadTemplate(name: templateName)
 
-    do {
-      let subContext = includeContext.flatMap { context[$0] as? [String: Any] } ?? [:]
-      return try context.push(dictionary: subContext) {
-        try template.render(context)
-      }
-    } catch {
-      if let error = error as? TemplateSyntaxError {
-        throw TemplateSyntaxError(reason: error.reason, stackTrace: error.allTokens)
-      } else {
-        throw error
-      }
-    }
-  }
+		do {
+			let subContext = includeContext.flatMap { context[$0] as? [String: Any] } ?? [:]
+			return try context.push(dictionary: subContext) {
+				try template.render(context)
+			}
+		} catch {
+			if let error = error as? TemplateSyntaxError {
+				throw TemplateSyntaxError(reason: error.reason, stackTrace: error.allTokens)
+			} else {
+				throw error
+			}
+		}
+	}
 }

Sources/Stencil/Inheritance.swift

@@ -1,164 +1,158 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 class BlockContext {
-  class var contextKey: String { "block_context" }
+	class var contextKey: String { "block_context" }
 
-  // contains mapping of block names to their nodes and templates where they are defined
-  var blocks: [String: [BlockNode]]
+	// contains mapping of block names to their nodes and templates where they are defined
+	var blocks: [String: [BlockNode]]
 
-  init(blocks: [String: BlockNode]) {
-    self.blocks = [:]
-    blocks.forEach { self.blocks[$0.key] = [$0.value] }
-  }
+	init(blocks: [String: BlockNode]) {
+		self.blocks = [:]
+		blocks.forEach { self.blocks[$0.key] = [$0.value] }
+	}
 
-  func push(_ block: BlockNode, forKey blockName: String) {
-    if var blocks = blocks[blockName] {
-      blocks.append(block)
-      self.blocks[blockName] = blocks
-    } else {
-      self.blocks[blockName] = [block]
-    }
-  }
+	func push(_ block: BlockNode, forKey blockName: String) {
+		if var blocks = blocks[blockName] {
+			blocks.append(block)
+			self.blocks[blockName] = blocks
+		} else {
+			self.blocks[blockName] = [block]
+		}
+	}
 
-  func pop(_ blockName: String) -> BlockNode? {
-    if var blocks = blocks[blockName] {
-      let block = blocks.removeFirst()
-      if blocks.isEmpty {
-        self.blocks.removeValue(forKey: blockName)
-      } else {
-        self.blocks[blockName] = blocks
-      }
-      return block
-    } else {
-      return nil
-    }
-  }
+	func pop(_ blockName: String) -> BlockNode? {
+		if var blocks = blocks[blockName] {
+			let block = blocks.removeFirst()
+			if blocks.isEmpty {
+				self.blocks.removeValue(forKey: blockName)
+			} else {
+				self.blocks[blockName] = blocks
+			}
+			return block
+		} else {
+			return nil
+		}
+	}
 }
 
 extension Collection {
-  func any(_ closure: (Iterator.Element) -> Bool) -> Iterator.Element? {
-    for element in self where closure(element) {
-      return element
-    }
+	func any(_ closure: (Iterator.Element) -> Bool) -> Iterator.Element? {
+		for element in self where closure(element) {
+			return element
+		}
 
-    return nil
-  }
+		return nil
+	}
 }
 
 class ExtendsNode: NodeType {
-  let templateName: Variable
-  let blocks: [String: BlockNode]
-  let token: Token?
+	let templateName: Variable
+	let blocks: [String: BlockNode]
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    let bits = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		let bits = token.components
 
-    guard bits.count == 2 else {
-      throw TemplateSyntaxError("'extends' takes one argument, the template file to be extended")
-    }
+		guard bits.count == 2 else {
+			throw TemplateSyntaxError("'extends' takes one argument, the template file to be extended")
+		}
 
-    let parsedNodes = try parser.parse()
-    guard (parsedNodes.any { $0 is ExtendsNode }) == nil else {
-      throw TemplateSyntaxError("'extends' cannot appear more than once in the same template")
-    }
+		let parsedNodes = try parser.parse()
+		guard (parsedNodes.any { $0 is Self }) == nil else {
+			throw TemplateSyntaxError("'extends' cannot appear more than once in the same template")
+		}
 
-    let blockNodes = parsedNodes.compactMap { $0 as? BlockNode }
-    let nodes = blockNodes.reduce(into: [String: BlockNode]()) { accumulator, node in
-      accumulator[node.name] = node
-    }
+		let blockNodes = parsedNodes.compactMap { $0 as? BlockNode }
+		let nodes = blockNodes.reduce(into: [String: BlockNode]()) { accumulator, node in
+			accumulator[node.name] = node
+		}
 
-    return ExtendsNode(templateName: Variable(bits[1]), blocks: nodes, token: token)
-  }
+		return ExtendsNode(templateName: Variable(bits[1]), blocks: nodes, token: token)
+	}
 
-  init(templateName: Variable, blocks: [String: BlockNode], token: Token) {
-    self.templateName = templateName
-    self.blocks = blocks
-    self.token = token
-  }
+	init(templateName: Variable, blocks: [String: BlockNode], token: Token) {
+		self.templateName = templateName
+		self.blocks = blocks
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    guard let templateName = try self.templateName.resolve(context) as? String else {
-      throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
-    }
+	func render(_ context: Context) throws -> String {
+		guard let templateName = try self.templateName.resolve(context) as? String else {
+			throw TemplateSyntaxError("'\(self.templateName)' could not be resolved as a string")
+		}
 
-    let baseTemplate = try context.environment.loadTemplate(name: templateName)
+		let baseTemplate = try context.environment.loadTemplate(name: templateName)
 
-    let blockContext: BlockContext
-    if let currentBlockContext = context[BlockContext.contextKey] as? BlockContext {
-      blockContext = currentBlockContext
-      for (name, block) in blocks {
-        blockContext.push(block, forKey: name)
-      }
-    } else {
-      blockContext = BlockContext(blocks: blocks)
-    }
+		let blockContext: BlockContext
+		if let currentBlockContext = context[BlockContext.contextKey] as? BlockContext {
+			blockContext = currentBlockContext
+			for (name, block) in blocks {
+				blockContext.push(block, forKey: name)
+			}
+		} else {
+			blockContext = BlockContext(blocks: blocks)
+		}
 
-    do {
-      // pushes base template and renders it's content
-      // block_context contains all blocks from child templates
-      return try context.push(dictionary: [BlockContext.contextKey: blockContext]) {
-        try baseTemplate.render(context)
-      }
-    } catch {
-      // if error template is already set (see catch in BlockNode)
-      // and it happend in the same template as current template
-      // there is no need to wrap it in another error
-      if let error = error as? TemplateSyntaxError, error.templateName != token?.sourceMap.filename {
-        throw TemplateSyntaxError(reason: error.reason, stackTrace: error.allTokens)
-      } else {
-        throw error
-      }
-    }
-  }
+		do {
+			// pushes base template and renders it's content
+			// block_context contains all blocks from child templates
+			return try context.push(dictionary: [BlockContext.contextKey: blockContext]) {
+				try baseTemplate.render(context)
+			}
+		} catch {
+			// if error template is already set (see catch in BlockNode)
+			// and it happend in the same template as current template
+			// there is no need to wrap it in another error
+			if let error = error as? TemplateSyntaxError, error.templateName != token?.sourceMap.filename {
+				throw TemplateSyntaxError(reason: error.reason, stackTrace: error.allTokens)
+			} else {
+				throw error
+			}
+		}
+	}
 }
 
 class BlockNode: NodeType {
-  let name: String
-  let nodes: [NodeType]
-  let token: Token?
+	let name: String
+	let nodes: [NodeType]
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    let bits = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		let bits = token.components
 
-    guard bits.count == 2 else {
-      throw TemplateSyntaxError("'block' tag takes one argument, the block name")
-    }
+		guard bits.count == 2 else {
+			throw TemplateSyntaxError("'block' tag takes one argument, the block name")
+		}
 
-    let blockName = bits[1]
-    let nodes = try parser.parse(until(["endblock"]))
-    _ = parser.nextToken()
-    return BlockNode(name: blockName, nodes: nodes, token: token)
-  }
+		let blockName = bits[1]
+		let nodes = try parser.parse(until(["endblock"]))
+		_ = parser.nextToken()
+		return BlockNode(name: blockName, nodes: nodes, token: token)
+	}
 
-  init(name: String, nodes: [NodeType], token: Token) {
-    self.name = name
-    self.nodes = nodes
-    self.token = token
-  }
+	init(name: String, nodes: [NodeType], token: Token) {
+		self.name = name
+		self.nodes = nodes
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    if let blockContext = context[BlockContext.contextKey] as? BlockContext, let child = blockContext.pop(name) {
-      let childContext: [String: Any] = [
-        BlockContext.contextKey: blockContext,
-        "block": ["super": try self.render(context)]
-      ]
+	func render(_ context: Context) throws -> String {
+		if let blockContext = context[BlockContext.contextKey] as? BlockContext, let child = blockContext.pop(name) {
+			let childContext: [String: Any] = [
+				BlockContext.contextKey: blockContext,
+				"block": ["super": try self.render(context)]
+			]
 
-      // render extension node
-      do {
-        return try context.push(dictionary: childContext) {
-          try child.render(context)
-        }
-      } catch {
-        throw error.withToken(child.token)
-      }
-    }
+			// render extension node
+			do {
+				return try context.push(dictionary: childContext) {
+					try child.render(context)
+				}
+			} catch {
+				throw error.withToken(child.token)
+			}
+		}
 
-    let result = try renderNodes(nodes, context)
-    context.cacheBlock(name, content: result)
-    return result
-  }
+		let result = try renderNodes(nodes, context)
+		context.cacheBlock(name, content: result)
+		return result
+	}
 }

Sources/Stencil/KeyPath.swift

@@ -1,118 +1,112 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 /// A structure used to represent a template variable, and to resolve it in a given context.
 final class KeyPath {
-  private var components = [String]()
-  private var current = ""
-  private var partialComponents = [String]()
-  private var subscriptLevel = 0
+	private var components = [String]()
+	private var current = ""
+	private var partialComponents = [String]()
+	private var subscriptLevel = 0
 
-  let variable: String
-  let context: Context
+	let variable: String
+	let context: Context
 
-  // Split the keypath string and resolve references if possible
-  init(_ variable: String, in context: Context) {
-    self.variable = variable
-    self.context = context
-  }
+	// Split the keypath string and resolve references if possible
+	init(_ variable: String, in context: Context) {
+		self.variable = variable
+		self.context = context
+	}
 
-  func parse() throws -> [String] {
-    defer {
-      components = []
-      current = ""
-      partialComponents = []
-      subscriptLevel = 0
-    }
+	func parse() throws -> [String] {
+		defer {
+			components = []
+			current = ""
+			partialComponents = []
+			subscriptLevel = 0
+		}
 
-    for character in variable {
-      switch character {
-      case "." where subscriptLevel == 0:
-        try foundSeparator()
-      case "[":
-        try openBracket()
-      case "]":
-        try closeBracket()
-      default:
-        try addCharacter(character)
-      }
-    }
-    try finish()
+		for character in variable {
+			switch character {
+			case "." where subscriptLevel == 0:
+				try foundSeparator()
+			case "[":
+				try openBracket()
+			case "]":
+				try closeBracket()
+			default:
+				try addCharacter(character)
+			}
+		}
+		try finish()
 
-    return components
-  }
+		return components
+	}
 
-  private func foundSeparator() throws {
-    if !current.isEmpty {
-      partialComponents.append(current)
-    }
+	private func foundSeparator() throws {
+		if !current.isEmpty {
+			partialComponents.append(current)
+		}
 
-    guard !partialComponents.isEmpty else {
-      throw TemplateSyntaxError("Unexpected '.' in variable '\(variable)'")
-    }
+		guard !partialComponents.isEmpty else {
+			throw TemplateSyntaxError("Unexpected '.' in variable '\(variable)'")
+		}
 
-    components += partialComponents
-    current = ""
-    partialComponents = []
-  }
+		components += partialComponents
+		current = ""
+		partialComponents = []
+	}
 
-  // when opening the first bracket, we must have a partial component
-  private func openBracket() throws {
-    guard !partialComponents.isEmpty || !current.isEmpty else {
-      throw TemplateSyntaxError("Unexpected '[' in variable '\(variable)'")
-    }
+	// when opening the first bracket, we must have a partial component
+	private func openBracket() throws {
+		guard !partialComponents.isEmpty || !current.isEmpty else {
+			throw TemplateSyntaxError("Unexpected '[' in variable '\(variable)'")
+		}
 
-    if subscriptLevel > 0 {
-      current.append("[")
-    } else if !current.isEmpty {
-      partialComponents.append(current)
-      current = ""
-    }
+		if subscriptLevel > 0 {
+			current.append("[")
+		} else if !current.isEmpty {
+			partialComponents.append(current)
+			current = ""
+		}
 
-    subscriptLevel += 1
-  }
+		subscriptLevel += 1
+	}
 
-  // for a closing bracket at root level, try to resolve the reference
-  private func closeBracket() throws {
-    guard subscriptLevel > 0 else {
-      throw TemplateSyntaxError("Unbalanced ']' in variable '\(variable)'")
-    }
+	// for a closing bracket at root level, try to resolve the reference
+	private func closeBracket() throws {
+		guard subscriptLevel > 0 else {
+			throw TemplateSyntaxError("Unbalanced ']' in variable '\(variable)'")
+		}
 
-    if subscriptLevel > 1 {
-      current.append("]")
-    } else if !current.isEmpty,
-      let value = try Variable(current).resolve(context) {
-      partialComponents.append("\(value)")
-      current = ""
-    } else {
-      throw TemplateSyntaxError("Unable to resolve subscript '\(current)' in variable '\(variable)'")
-    }
+		if subscriptLevel > 1 {
+			current.append("]")
+		} else if !current.isEmpty,
+			let value = try Variable(current).resolve(context) {
+			partialComponents.append("\(value)")
+			current = ""
+		} else {
+			throw TemplateSyntaxError("Unable to resolve subscript '\(current)' in variable '\(variable)'")
+		}
 
-    subscriptLevel -= 1
-  }
+		subscriptLevel -= 1
+	}
 
-  private func addCharacter(_ character: Character) throws {
-    guard partialComponents.isEmpty || subscriptLevel > 0 else {
-      throw TemplateSyntaxError("Unexpected character '\(character)' in variable '\(variable)'")
-    }
+	private func addCharacter(_ character: Character) throws {
+		guard partialComponents.isEmpty || subscriptLevel > 0 else {
+			throw TemplateSyntaxError("Unexpected character '\(character)' in variable '\(variable)'")
+		}
 
-    current.append(character)
-  }
+		current.append(character)
+	}
 
-  private func finish() throws {
-    // check if we have a last piece
-    if !current.isEmpty {
-      partialComponents.append(current)
-    }
-    components += partialComponents
+	private func finish() throws {
+		// check if we have a last piece
+		if !current.isEmpty {
+			partialComponents.append(current)
+		}
+		components += partialComponents
 
-    guard subscriptLevel == 0 else {
-      throw TemplateSyntaxError("Unbalanced subscript brackets in variable '\(variable)'")
-    }
-  }
+		guard subscriptLevel == 0 else {
+			throw TemplateSyntaxError("Unbalanced subscript brackets in variable '\(variable)'")
+		}
+	}
 }

Sources/Stencil/LazyValueWrapper.swift

@@ -1,69 +1,57 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// Used to lazily set context data. Useful for example if you have some data that requires heavy calculations, and may
 /// not be used in every render possiblity.
 public final class LazyValueWrapper {
-  private let closure: (Context) throws -> Any
-  private let context: Context?
-  private var cachedValue: Any?
+	private let closure: (Context) throws -> Any
+	private let context: Context?
+	private var cachedValue: Any?
 
-  /// Create a wrapper that'll use a **reference** to the current context.
-  /// This means when the closure is evaluated, it'll use the **active** context at that moment.
-  ///
-  /// - Parameters:
-  ///   - closure: The closure to lazily evaluate
-  public init(closure: @escaping (Context) throws -> Any) {
-    self.context = nil
-    self.closure = closure
-  }
+	/// Create a wrapper that'll use a **reference** to the current context.
+	/// This means when the closure is evaluated, it'll use the **active** context at that moment.
+	///
+	/// - Parameters:
+	///		- closure: The closure to lazily evaluate
+	public init(closure: @escaping (Context) throws -> Any) {
+		self.context = nil
+		self.closure = closure
+	}
 
-  /// Create a wrapper that'll create a **copy** of the current context.
-  /// This means when the closure is evaluated, it'll use the context **as it was** when this wrapper was created.
-  ///
-  /// - Parameters:
-  ///   - context: The context to use during evaluation
-  ///   - closure: The closure to lazily evaluate
-  /// - Note: This will use more memory than the other `init` as it needs to keep a copy of the full context around.
-  public init(copying context: Context, closure: @escaping (Context) throws -> Any) {
-    self.context = Context(dictionaries: context.dictionaries, environment: context.environment)
-    self.closure = closure
-  }
+	/// Create a wrapper that'll create a **copy** of the current context.
+	/// This means when the closure is evaluated, it'll use the context **as it was** when this wrapper was created.
+	///
+	/// - Parameters:
+	///		- context: The context to use during evaluation
+	///		- closure: The closure to lazily evaluate
+	/// - Note: This will use more memory than the other `init` as it needs to keep a copy of the full context around.
+	public init(copying context: Context, closure: @escaping (Context) throws -> Any) {
+		self.context = Context(dictionaries: context.dictionaries, environment: context.environment)
+		self.closure = closure
+	}
 
-  /// Shortcut for creating a lazy wrapper when you don't need access to the Stencil context.
-  ///
-  /// - Parameters:
-  ///   - closure: The closure to lazily evaluate
-  public init(_ closure: @autoclosure @escaping () throws -> Any) {
-    self.context = nil
-    self.closure = { _ in try closure() }
-  }
+	/// Shortcut for creating a lazy wrapper when you don't need access to the Stencil context.
+	///
+	/// - Parameters:
+	///		- closure: The closure to lazily evaluate
+	public init(_ closure: @autoclosure @escaping () throws -> Any) {
+		self.context = nil
+		self.closure = { _ in try closure() }
+	}
 }
 
 extension LazyValueWrapper {
-  func value(context: Context) throws -> Any {
-    if let value = cachedValue {
-      return value
-    } else {
-      let value = try closure(self.context ?? context)
-      cachedValue = value
-      return value
-    }
-  }
+	func value(context: Context) throws -> Any {
+		if let value = cachedValue {
+			return value
+		} else {
+			let value = try closure(self.context ?? context)
+			cachedValue = value
+			return value
+		}
+	}
 }
 
 extension LazyValueWrapper: Resolvable {
-  public func resolve(_ context: Context) throws -> Any? {
-    let value = try self.value(context: context)
-    return try (value as? Resolvable)?.resolve(context) ?? value
-  }
-}
-
-extension LazyValueWrapper: Normalizable {
-  public func normalize() -> Any? {
-    (cachedValue as? Normalizable)?.normalize() ?? cachedValue
-  }
+	public func resolve(_ context: Context) throws -> Any? {
+		let value = try self.value(context: context)
+		return try (value as? Resolvable)?.resolve(context) ?? value
+	}
 }

Sources/Stencil/Lexer.swift

@@ -1,262 +1,265 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
+// swiftlint:disable large_tuple
 typealias Line = (content: String, number: UInt, range: Range<String.Index>)
+/// Location in some content (text)
+public typealias ContentLocation = (content: String, lineNumber: UInt, lineOffset: Int)
+// swiftlint:enable large_tuple
 
 struct Lexer {
-  let templateName: String?
-  let templateString: String
-  let lines: [Line]
+	let templateName: String?
+	let templateString: String
+	let lines: [Line]
 
-  /// The potential token start characters. In a template these appear after a
-  /// `{` character, for example `{{`, `{%`, `{#`, ...
-  private static let tokenChars: [Unicode.Scalar] = ["{", "%", "#"]
+	/// The potential token start characters. In a template these appear after a
+	/// `{` character, for example `{{`, `{%`, `{#`, ...
+	private static let tokenChars: [Unicode.Scalar] = ["{", "%", "#"]
 
-  /// The minimum length of a tag
-  private static let tagLength = 2
+	/// The minimum length of a tag
+	private static let tagLength = 2
 
-  /// The token end characters, corresponding to their token start characters.
-  /// For example, a variable token starts with `{{` and ends with `}}`
-  private static let tokenCharMap: [Unicode.Scalar: Unicode.Scalar] = [
-    "{": "}",
-    "%": "%",
-    "#": "#"
-  ]
+	/// The token end characters, corresponding to their token start characters.
+	/// For example, a variable token starts with `{{` and ends with `}}`
+	private static let tokenCharMap: [Unicode.Scalar: Unicode.Scalar] = [
+		"{": "}",
+		"%": "%",
+		"#": "#"
+	]
 
-  /// Characters controlling whitespace trimming behaviour
-  private static let behaviourMap: [Character: WhitespaceBehaviour.Behaviour] = [
-    "+": .keep,
-    "-": .trim
-  ]
+	/// Characters controlling whitespace trimming behaviour
+	private static let behaviourMap: [Character: WhitespaceBehaviour.Behaviour] = [
+		"+": .keep,
+		"-": .trim
+	]
 
-  init(templateName: String? = nil, templateString: String) {
-    self.templateName = templateName
-    self.templateString = templateString
+	init(templateName: String? = nil, templateString: String) {
+		self.templateName = templateName
+		self.templateString = templateString
 
-    self.lines = zip(1..., templateString.components(separatedBy: .newlines)).compactMap { index, line in
-      guard !line.isEmpty,
-        let range = templateString.range(of: line) else { return nil }
-      return (content: line, number: UInt(index), range)
-    }
-  }
+		self.lines = zip(1..., templateString.components(separatedBy: .newlines)).compactMap { index, line in
+			guard !line.isEmpty,
+				let range = templateString.range(of: line) else { return nil }
+			return (content: line, number: UInt(index), range)
+		}
+	}
 
-  private func behaviour(string: String, tagLength: Int) -> WhitespaceBehaviour {
-    let leftIndex = string.index(string.startIndex, offsetBy: tagLength, limitedBy: string.endIndex)
-    let rightIndex = string.index(string.endIndex, offsetBy: -(tagLength + 1), limitedBy: string.startIndex)
+	private func behaviour(string: String, tagLength: Int) -> WhitespaceBehaviour {
+		let leftIndex = string.index(string.startIndex, offsetBy: tagLength, limitedBy: string.endIndex)
+		let rightIndex = string.index(string.endIndex, offsetBy: -(tagLength + 1), limitedBy: string.startIndex)
 
-    return WhitespaceBehaviour(
-      leading: Self.behaviourMap[leftIndex.map { string[$0] } ?? " "] ?? .unspecified,
-      trailing: Self.behaviourMap[rightIndex.map { string[$0] } ?? " "] ?? .unspecified
-    )
-  }
+		return WhitespaceBehaviour(
+			leading: Self.behaviourMap[leftIndex.map { string[$0] } ?? " "] ?? .unspecified,
+			trailing: Self.behaviourMap[rightIndex.map { string[$0] } ?? " "] ?? .unspecified
+		)
+	}
 
-  /// Create a token that will be passed on to the parser, with the given
-  /// content and a range. The content will be tested to see if it's a
-  /// `variable`, a `block` or a `comment`, otherwise it'll default to a simple
-  /// `text` token.
-  ///
-  /// - Parameters:
-  ///   - string: The content string of the token
-  ///   - range: The range within the template content, used for smart
-  ///            error reporting
-  func createToken(string: String, at range: Range<String.Index>) -> Token {
-    func strip(length: (Int, Int) = (Self.tagLength, Self.tagLength)) -> String {
-      guard string.count > (length.0 + length.1) else { return "" }
-      let trimmed = String(string.dropFirst(length.0).dropLast(length.1))
-        .components(separatedBy: "\n")
-        .filter { !$0.isEmpty }
-        .map { $0.trim(character: " ") }
-        .joined(separator: " ")
-      return trimmed
-    }
+	/// Create a token that will be passed on to the parser, with the given
+	/// content and a range. The content will be tested to see if it's a
+	/// `variable`, a `block` or a `comment`, otherwise it'll default to a simple
+	/// `text` token.
+	///
+	/// - Parameters:
+	///		- string: The content string of the token
+	///		- range: The range within the template content, used for smart
+	///						 error reporting
+	func createToken(string: String, at range: Range<String.Index>, _ isInEscapeMode: Bool = false) -> Token {
+		func strip(length: (Int, Int) = (Self.tagLength, Self.tagLength)) -> String {
+			guard string.count > (length.0 + length.1) else { return "" }
+			let trimmed = String(string.dropFirst(length.0).dropLast(length.1))
+				.components(separatedBy: "\n")
+				.filter { !$0.isEmpty }
+				.map { $0.trim(character: " ") }
+				.joined(separator: " ")
+			return trimmed
+		}
 
-    if string.hasPrefix("{{") || string.hasPrefix("{%") || string.hasPrefix("{#") {
-      let behaviour = string.hasPrefix("{%") ? behaviour(string: string, tagLength: Self.tagLength) : .unspecified
-      let stripLengths = (
-        Self.tagLength + (behaviour.leading != .unspecified ? 1 : 0),
-        Self.tagLength + (behaviour.trailing != .unspecified ? 1 : 0)
-      )
+		if !isInEscapeMode && (string.hasPrefix("{{") || string.hasPrefix("{%") || string.hasPrefix("{#")) {
+			let behaviour = string.hasPrefix("{%") ? behaviour(string: string, tagLength: Self.tagLength) : .unspecified
+			let stripLengths = (
+				Self.tagLength + (behaviour.leading != .unspecified ? 1 : 0),
+				Self.tagLength + (behaviour.trailing != .unspecified ? 1 : 0)
+			)
 
-      let value = strip(length: stripLengths)
-      let range = templateString.range(of: value, range: range) ?? range
-      let location = rangeLocation(range)
-      let sourceMap = SourceMap(filename: templateName, location: location)
+			let value = strip(length: stripLengths)
+			let range = templateString.range(of: value, range: range) ?? range
+			let location = rangeLocation(range)
+			let sourceMap = SourceMap(filename: templateName, location: location)
 
-      if string.hasPrefix("{{") {
-        return .variable(value: value, at: sourceMap)
-      } else if string.hasPrefix("{%") {
-        return .block(value: strip(length: stripLengths), at: sourceMap, whitespace: behaviour)
-      } else if string.hasPrefix("{#") {
-        return .comment(value: value, at: sourceMap)
-      }
-    }
+			if string.hasPrefix("{{") {
+				return .variable(value: value, at: sourceMap)
+			} else if string.hasPrefix("{%") {
+				return .block(value: strip(length: stripLengths), at: sourceMap, whitespace: behaviour)
+			} else if string.hasPrefix("{#") {
+				return .comment(value: value, at: sourceMap)
+			}
+		}
 
-    let location = rangeLocation(range)
-    let sourceMap = SourceMap(filename: templateName, location: location)
-    return .text(value: string, at: sourceMap)
-  }
+		let location = rangeLocation(range)
+		let sourceMap = SourceMap(filename: templateName, location: location)
+		return .text(value: string, at: sourceMap)
+	}
 
-  /// Transforms the template into a list of tokens, that will eventually be
-  /// passed on to the parser.
-  ///
-  /// - Returns: The list of tokens (see `createToken(string: at:)`).
-  func tokenize() -> [Token] {
-    var tokens: [Token] = []
+	/// Transforms the template into a list of tokens, that will eventually be
+	/// passed on to the parser.
+	///
+	/// - Returns: The list of tokens (see `createToken(string: at:)`).
+	func tokenize() -> [Token] {
+		var tokens: [Token] = []
 
-    let scanner = Scanner(templateString)
-    while !scanner.isEmpty {
-      if let (char, text) = scanner.scanForTokenStart(Self.tokenChars) {
-        if !text.isEmpty {
-          tokens.append(createToken(string: text, at: scanner.range))
-        }
+		let scanner = Scanner(templateString)
+		while !scanner.isEmpty {
+			if let (char, text, isInEscapeMode) = scanner.scanForTokenStart(Self.tokenChars) {
+				if !text.isEmpty {
+					tokens.append(createToken(string: text, at: scanner.range))
+				}
 
-        guard let end = Self.tokenCharMap[char] else { continue }
-        let result = scanner.scanForTokenEnd(end)
-        tokens.append(createToken(string: result, at: scanner.range))
-      } else {
-        tokens.append(createToken(string: scanner.content, at: scanner.range))
-        scanner.content = ""
-      }
-    }
+				guard let end = Self.tokenCharMap[char] else { continue }
+				let result = scanner.scanForTokenEnd(end)
+				tokens.append(createToken(string: result, at: scanner.range, isInEscapeMode))
+			} else {
+				tokens.append(createToken(string: scanner.content, at: scanner.range))
+				scanner.content = ""
+			}
+		}
 
-    return tokens
-  }
+		return tokens
+	}
 
-  /// Finds the line matching the given range (for a token)
-  ///
-  /// - Parameter range: The range to search for.
-  /// - Returns: The content for that line, the line number and offset within
-  ///            the line.
-  func rangeLocation(_ range: Range<String.Index>) -> ContentLocation {
-    guard let line = self.lines.first(where: { $0.range.contains(range.lowerBound) }) else {
-      return ("", 0, 0)
-    }
-    let offset = templateString.distance(from: line.range.lowerBound, to: range.lowerBound)
-    return (line.content, line.number, offset)
-  }
+	/// Finds the line matching the given range (for a token)
+	///
+	/// - Parameter range: The range to search for.
+	/// - Returns: The content for that line, the line number and offset within
+	///						 the line.
+	func rangeLocation(_ range: Range<String.Index>) -> ContentLocation {
+		guard let line = self.lines.first(where: { $0.range.contains(range.lowerBound) }) else {
+			return ("", 0, 0)
+		}
+		let offset = templateString.distance(from: line.range.lowerBound, to: range.lowerBound)
+		return (line.content, line.number, offset)
+	}
 }
 
 class Scanner {
-  let originalContent: String
-  var content: String
-  var range: Range<String.UnicodeScalarView.Index>
+	let originalContent: String
+	var content: String
+	var range: Range<String.UnicodeScalarView.Index>
 
-  /// The start delimiter for a token.
-  private static let tokenStartDelimiter: Unicode.Scalar = "{"
-  /// And the corresponding end delimiter for a token.
-  private static let tokenEndDelimiter: Unicode.Scalar = "}"
+	/// The start delimiter for a token.
+	private static let tokenStartDelimiter: Unicode.Scalar = "{"
+	/// And the corresponding end delimiter for a token.
+	private static let tokenEndDelimiter: Unicode.Scalar = "}"
+	private static let tokenDelimiterEscape: Unicode.Scalar = "\\"
 
-  init(_ content: String) {
-    self.originalContent = content
-    self.content = content
-    range = content.unicodeScalars.startIndex..<content.unicodeScalars.startIndex
-  }
+	init(_ content: String) {
+		self.originalContent = content
+		self.content = content
+		range = content.unicodeScalars.startIndex..<content.unicodeScalars.startIndex
+	}
 
-  var isEmpty: Bool {
-    content.isEmpty
-  }
+	var isEmpty: Bool {
+		content.isEmpty
+	}
 
-  /// Scans for the end of a token, with a specific ending character. If we're
-  /// searching for the end of a block token `%}`, this method receives a `%`.
-  /// The scanner will search for that `%` followed by a `}`.
-  ///
-  /// Note: if the end of a token is found, the `content` and `range`
-  /// properties are updated to reflect this. `content` will be set to what
-  /// remains of the template after the token. `range` will be set to the range
-  /// of the token within the template.
-  ///
-  /// - Parameter tokenChar: The token end character to search for.
-  /// - Returns: The content of a token, or "" if no token end was found.
-  func scanForTokenEnd(_ tokenChar: Unicode.Scalar) -> String {
-    var foundChar = false
+	/// Scans for the end of a token, with a specific ending character. If we're
+	/// searching for the end of a block token `%}`, this method receives a `%`.
+	/// The scanner will search for that `%` followed by a `}`.
+	///
+	/// Note: if the end of a token is found, the `content` and `range`
+	/// properties are updated to reflect this. `content` will be set to what
+	/// remains of the template after the token. `range` will be set to the range
+	/// of the token within the template.
+	///
+	/// - Parameter tokenChar: The token end character to search for.
+	/// - Returns: The content of a token, or "" if no token end was found.
+	func scanForTokenEnd(_ tokenChar: Unicode.Scalar) -> String {
+		var foundChar = false
 
-    for (index, char) in zip(0..., content.unicodeScalars) {
-      if foundChar && char == Self.tokenEndDelimiter {
-        let result = String(content.unicodeScalars.prefix(index + 1))
-        content = String(content.unicodeScalars.dropFirst(index + 1))
-        range = range.upperBound..<originalContent.unicodeScalars.index(range.upperBound, offsetBy: index + 1)
-        return result
-      } else {
-        foundChar = (char == tokenChar)
-      }
-    }
+		for (index, char) in zip(0..., content.unicodeScalars) {
+			if foundChar && char == Self.tokenEndDelimiter {
+				let result = String(content.unicodeScalars.prefix(index + 1))
+				content = String(content.unicodeScalars.dropFirst(index + 1))
+				range = range.upperBound..<originalContent.unicodeScalars.index(range.upperBound, offsetBy: index + 1)
+				return result
+			} else {
+				foundChar = (char == tokenChar)
+			}
+		}
 
-    content = ""
-    return ""
-  }
+		content = ""
+		return ""
+	}
 
-  /// Scans for the start of a token, with a list of potential starting
-  /// characters. To scan for the start of variables (`{{`), blocks (`{%`) and
-  /// comments (`{#`), this method receives the characters `{`, `%` and `#`.
-  /// The scanner will search for a `{`, followed by one of the search
-  /// characters. It will give the found character, and the content that came
-  /// before the token.
-  ///
-  /// Note: if the start of a token is found, the `content` and `range`
-  /// properties are updated to reflect this. `content` will be set to what
-  /// remains of the template starting with the token. `range` will be set to
-  /// the start of the token within the template.
-  ///
-  /// - Parameter tokenChars: List of token start characters to search for.
-  /// - Returns: The found token start character, together with the content
-  ///            before the token, or nil of no token start was found.
-  func scanForTokenStart(_ tokenChars: [Unicode.Scalar]) -> (Unicode.Scalar, String)? {
-    var foundBrace = false
+	/// Scans for the start of a token, with a list of potential starting
+	/// characters. To scan for the start of variables (`{{`), blocks (`{%`) and
+	/// comments (`{#`), this method receives the characters `{`, `%` and `#`.
+	/// The scanner will search for a `{`, followed by one of the search
+	/// characters. It will give the found character, and the content that came
+	/// before the token.
+	///
+	/// Note: if the start of a token is found, the `content` and `range`
+	/// properties are updated to reflect this. `content` will be set to what
+	/// remains of the template starting with the token. `range` will be set to
+	/// the start of the token within the template.
+	///
+	/// - Parameter tokenChars: List of token start characters to search for.
+	/// - Returns: The found token start character, together with the content
+	///						 before the token, or nil of no token start was found.
+	// swiftlint:disable:next large_tuple
+	func scanForTokenStart(_ tokenChars: [Unicode.Scalar]) -> (Unicode.Scalar, String, Bool)? {
+		var foundBrace = false
+		var isInEscapeMode = false
+		var lastChar: Unicode.Scalar = " "
 
-    range = range.upperBound..<range.upperBound
-    for (index, char) in zip(0..., content.unicodeScalars) {
-      if foundBrace && tokenChars.contains(char) {
-        let result = String(content.unicodeScalars.prefix(index - 1))
-        content = String(content.unicodeScalars.dropFirst(index - 1))
-        range = range.upperBound..<originalContent.unicodeScalars.index(range.upperBound, offsetBy: index - 1)
-        return (char, result)
-      } else {
-        foundBrace = (char == Self.tokenStartDelimiter)
-      }
-    }
+		range = range.upperBound..<range.upperBound
+		for (index, char) in zip(0..., content.unicodeScalars) {
+			if foundBrace && tokenChars.contains(char) {
+				let prefixOffset = isInEscapeMode ? 1 : 0
+				let prefix = String(content.unicodeScalars.prefix(index - 1 - prefixOffset))
+				content = String(content.unicodeScalars.dropFirst(index - 1))
+				range = range.upperBound..<originalContent.unicodeScalars.index(range.upperBound, offsetBy: index - 1)
 
-    return nil
-  }
+				return (char, prefix, isInEscapeMode)
+			} else {
+				foundBrace = (char == Self.tokenStartDelimiter)
+				isInEscapeMode = (lastChar == Self.tokenDelimiterEscape)
+				lastChar = char
+			}
+		}
+
+		return nil
+	}
 }
 
 extension String {
-  func findFirstNot(character: Character) -> String.Index? {
-    var index = startIndex
+	func findFirstNot(character: Character) -> String.Index? {
+		var index = startIndex
 
-    while index != endIndex {
-      if character != self[index] {
-        return index
-      }
-      index = self.index(after: index)
-    }
+		while index != endIndex {
+			if character != self[index] {
+				return index
+			}
+			index = self.index(after: index)
+		}
 
-    return nil
-  }
+		return nil
+	}
 
-  func findLastNot(character: Character) -> String.Index? {
-    var index = self.index(before: endIndex)
+	func findLastNot(character: Character) -> String.Index? {
+		var index = self.index(before: endIndex)
 
-    while index != startIndex {
-      if character != self[index] {
-        return self.index(after: index)
-      }
-      index = self.index(before: index)
-    }
+		while index != startIndex {
+			if character != self[index] {
+				return self.index(after: index)
+			}
+			index = self.index(before: index)
+		}
 
-    return nil
-  }
+		return nil
+	}
 
-  func trim(character: Character) -> String {
-    let first = findFirstNot(character: character) ?? startIndex
-    let last = findLastNot(character: character) ?? endIndex
-    return String(self[first..<last])
-  }
+	func trim(character: Character) -> String {
+		let first = findFirstNot(character: character) ?? startIndex
+		let last = findLastNot(character: character) ?? endIndex
+		return String(self[first..<last])
+	}
 }
-
-/// Location in some content (text)
-public typealias ContentLocation = (content: String, lineNumber: UInt, lineOffset: Int)

Sources/Stencil/Loader.swift

@@ -1,134 +1,128 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 import PathKit
 
 /// Type used for loading a template
 public protocol Loader {
-  /// Load a template with the given name
-  func loadTemplate(name: String, environment: Environment) throws -> Template
-  /// Load a template with the given list of names
-  func loadTemplate(names: [String], environment: Environment) throws -> Template
+	/// Load a template with the given name
+	func loadTemplate(name: String, environment: Environment) throws -> Template
+	/// Load a template with the given list of names
+	func loadTemplate(names: [String], environment: Environment) throws -> Template
 }
 
 extension Loader {
-  /// Default implementation, tries to load the first template that exists from the list of given names
-  public func loadTemplate(names: [String], environment: Environment) throws -> Template {
-    for name in names {
-      do {
-        return try loadTemplate(name: name, environment: environment)
-      } catch is TemplateDoesNotExist {
-        continue
-      } catch {
-        throw error
-      }
-    }
+	/// Default implementation, tries to load the first template that exists from the list of given names
+	public func loadTemplate(names: [String], environment: Environment) throws -> Template {
+		for name in names {
+			do {
+				return try loadTemplate(name: name, environment: environment)
+			} catch is TemplateDoesNotExist {
+				continue
+			} catch {
+				throw error
+			}
+		}
 
-    throw TemplateDoesNotExist(templateNames: names, loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: names, loader: self)
+	}
 }
 
 // A class for loading a template from disk
 public class FileSystemLoader: Loader, CustomStringConvertible {
-  public let paths: [Path]
+	public let paths: [Path]
 
-  public init(paths: [Path]) {
-    self.paths = paths
-  }
+	public init(paths: [Path]) {
+		self.paths = paths
+	}
 
-  public init(bundle: [Bundle]) {
-    self.paths = bundle.map { bundle in
-      Path(bundle.bundlePath)
-    }
-  }
+	public init(bundle: [Bundle]) {
+		self.paths = bundle.compactMap { bundle in
+			Path(bundle.path)
+		}
+	}
 
-  public var description: String {
-    "FileSystemLoader(\(paths))"
-  }
+	public var description: String {
+		"FileSystemLoader(\(paths))"
+	}
 
-  public func loadTemplate(name: String, environment: Environment) throws -> Template {
-    for path in paths {
-      let templatePath = try path.safeJoin(path: Path(name))
+	public func loadTemplate(name: String, environment: Environment) throws -> Template {
+		for path in paths {
+			let templatePath = try path.safeJoin(path: name)
 
-      if !templatePath.exists {
-        continue
-      }
+			if !templatePath.exists {
+				continue
+			}
 
-      let content: String = try templatePath.read()
-      return environment.templateClass.init(templateString: content, environment: environment, name: name)
-    }
+			let content: String = try String(contentsOf: templatePath)
+			return environment.templateClass.init(templateString: content, environment: environment, name: name)
+		}
 
-    throw TemplateDoesNotExist(templateNames: [name], loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: [name], loader: self)
+	}
 
-  public func loadTemplate(names: [String], environment: Environment) throws -> Template {
-    for path in paths {
-      for templateName in names {
-        let templatePath = try path.safeJoin(path: Path(templateName))
+	public func loadTemplate(names: [String], environment: Environment) throws -> Template {
+		for path in paths {
+			for templateName in names {
+				let templatePath = try path.safeJoin(path: templateName)
 
-        if templatePath.exists {
-          let content: String = try templatePath.read()
-          return environment.templateClass.init(templateString: content, environment: environment, name: templateName)
-        }
-      }
-    }
+				if templatePath.exists {
+					let content: String = try String(contentsOf: templatePath)
+					return environment.templateClass.init(templateString: content, environment: environment, name: templateName)
+				}
+			}
+		}
 
-    throw TemplateDoesNotExist(templateNames: names, loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: names, loader: self)
+	}
 }
 
 public class DictionaryLoader: Loader {
-  public let templates: [String: String]
+	public let templates: [String: String]
 
-  public init(templates: [String: String]) {
-    self.templates = templates
-  }
+	public init(templates: [String: String]) {
+		self.templates = templates
+	}
 
-  public func loadTemplate(name: String, environment: Environment) throws -> Template {
-    if let content = templates[name] {
-      return environment.templateClass.init(templateString: content, environment: environment, name: name)
-    }
+	public func loadTemplate(name: String, environment: Environment) throws -> Template {
+		if let content = templates[name] {
+			return environment.templateClass.init(templateString: content, environment: environment, name: name)
+		}
 
-    throw TemplateDoesNotExist(templateNames: [name], loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: [name], loader: self)
+	}
 
-  public func loadTemplate(names: [String], environment: Environment) throws -> Template {
-    for name in names {
-      if let content = templates[name] {
-        return environment.templateClass.init(templateString: content, environment: environment, name: name)
-      }
-    }
+	public func loadTemplate(names: [String], environment: Environment) throws -> Template {
+		for name in names {
+			if let content = templates[name] {
+				return environment.templateClass.init(templateString: content, environment: environment, name: name)
+			}
+		}
 
-    throw TemplateDoesNotExist(templateNames: names, loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: names, loader: self)
+	}
 }
 
 extension Path {
-  func safeJoin(path: Path) throws -> Path {
-    let newPath = self + path
+	func safeJoin(path: String) throws -> Path {
+		let newPath = self / path
 
-    if !newPath.absolute().description.hasPrefix(absolute().description) {
-      throw SuspiciousFileOperation(basePath: self, path: newPath)
-    }
+		if !newPath.string.hasPrefix(self.string) {
+			throw SuspiciousFileOperation(basePath: self, path: newPath)
+		}
 
-    return newPath
-  }
+		return newPath
+	}
 }
 
 class SuspiciousFileOperation: Error {
-  let basePath: Path
-  let path: Path
+	let basePath: Path
+	let path: Path
 
-  init(basePath: Path, path: Path) {
-    self.basePath = basePath
-    self.path = path
-  }
+	init(basePath: Path, path: Path) {
+		self.basePath = basePath
+		self.path = path
+	}
 
-  var description: String {
-    "Path `\(path)` is located outside of base path `\(basePath)`"
-  }
+	var description: String {
+		"Path `\(path)` is located outside of base path `\(basePath)`"
+	}
 }

Sources/Stencil/Node.swift

@@ -1,189 +1,185 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 /// Represents a parsed node
 public protocol NodeType {
-  /// Render the node in the given context
-  func render(_ context: Context) throws -> String
+	/// Render the node in the given context
+	func render(_ context: Context) throws -> String
 
-  /// Reference to this node's token
-  var token: Token? { get }
+	/// Reference to this node's token
+	var token: Token? { get }
 }
 
 /// Render the collection of nodes in the given context
 public func renderNodes(_ nodes: [NodeType], _ context: Context) throws -> String {
-  var result = ""
+	var result = ""
 
-  for node in nodes {
-    do {
-      result += try node.render(context)
-    } catch {
-      throw error.withToken(node.token)
-    }
+	for node in nodes {
+		do {
+			result += try node.render(context)
+		} catch {
+			throw error.withToken(node.token)
+		}
 
-    let shouldBreak = context[LoopTerminationNode.breakContextKey] != nil
-    let shouldContinue = context[LoopTerminationNode.continueContextKey] != nil
+		let shouldBreak = context[LoopTerminationNode.breakContextKey] != nil
+		let shouldContinue = context[LoopTerminationNode.continueContextKey] != nil
 
-    if shouldBreak || shouldContinue {
-      break
-    }
-  }
+		if shouldBreak || shouldContinue {
+			break
+		}
+	}
 
-  return result
+	return result
 }
 
 /// Simple node, used for triggering a closure during rendering
 public class SimpleNode: NodeType {
-  public let handler: (Context) throws -> String
-  public let token: Token?
+	public let handler: (Context) throws -> String
+	public let token: Token?
 
-  public init(token: Token, handler: @escaping (Context) throws -> String) {
-    self.token = token
-    self.handler = handler
-  }
+	public init(token: Token, handler: @escaping (Context) throws -> String) {
+		self.token = token
+		self.handler = handler
+	}
 
-  public func render(_ context: Context) throws -> String {
-    try handler(context)
-  }
+	public func render(_ context: Context) throws -> String {
+		try handler(context)
+	}
 }
 
 /// Represents a block of text, renders the text
 public class TextNode: NodeType {
-  public let text: String
-  public let token: Token?
-  public let trimBehaviour: TrimBehaviour
+	public let text: String
+	public let token: Token?
+	public let trimBehaviour: TrimBehaviour
 
-  public init(text: String, trimBehaviour: TrimBehaviour = .nothing) {
-    self.text = text
-    self.token = nil
-    self.trimBehaviour = trimBehaviour
-  }
+	public init(text: String, trimBehaviour: TrimBehaviour = .nothing) {
+		self.text = text
+		self.token = nil
+		self.trimBehaviour = trimBehaviour
+	}
 
-  public func render(_ context: Context) throws -> String {
-    var string = self.text
-    if trimBehaviour.leading != .nothing, !string.isEmpty {
-      let range = NSRange(..<string.endIndex, in: string)
-      string = TrimBehaviour.leadingRegex(trim: trimBehaviour.leading)
-        .stringByReplacingMatches(in: string, options: [], range: range, withTemplate: "")
-    }
-    if trimBehaviour.trailing != .nothing, !string.isEmpty {
-      let range = NSRange(..<string.endIndex, in: string)
-      string = TrimBehaviour.trailingRegex(trim: trimBehaviour.trailing)
-        .stringByReplacingMatches(in: string, options: [], range: range, withTemplate: "")
-    }
-    return string
-  }
+	public func render(_ context: Context) throws -> String {
+		var string = self.text
+		if trimBehaviour.leading != .nothing, !string.isEmpty {
+			let range = NSRange(..<string.endIndex, in: string)
+			string = TrimBehaviour.leadingRegex(trim: trimBehaviour.leading)
+				.stringByReplacingMatches(in: string, options: [], range: range, withTemplate: "")
+		}
+		if trimBehaviour.trailing != .nothing, !string.isEmpty {
+			let range = NSRange(..<string.endIndex, in: string)
+			string = TrimBehaviour.trailingRegex(trim: trimBehaviour.trailing)
+				.stringByReplacingMatches(in: string, options: [], range: range, withTemplate: "")
+		}
+		return string
+	}
 }
 
 /// Representing something that can be resolved in a context
 public protocol Resolvable {
-  /// Try to resolve this with the given context
-  func resolve(_ context: Context) throws -> Any?
+	/// Try to resolve this with the given context
+	func resolve(_ context: Context) throws -> Any?
 }
 
 /// Represents a variable, renders the variable, may have conditional expressions.
 public class VariableNode: NodeType {
-  public let variable: Resolvable
-  public var token: Token?
-  let condition: Expression?
-  let elseExpression: Resolvable?
+	public let variable: Resolvable
+	public var token: Token?
+	let condition: Expression?
+	let elseExpression: Resolvable?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    let components = token.components
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		let components = token.components
 
-    func hasToken(_ token: String, at index: Int) -> Bool {
-      components.count > (index + 1) && components[index] == token
-    }
-    func compileResolvable(_ components: [String], containedIn token: Token) throws -> Resolvable {
-      try (try? parser.compileExpression(components: components, token: token)) ??
-        parser.compileFilter(components.joined(separator: " "), containedIn: token)
-    }
+		func hasToken(_ token: String, at index: Int) -> Bool {
+			components.count > (index + 1) && components[index] == token
+		}
+		func compileResolvable(_ components: [String], containedIn token: Token) throws -> Resolvable {
+			try (try? parser.compileExpression(components: components, token: token)) ??
+				parser.compileFilter(components.joined(separator: " "), containedIn: token)
+		}
 
-    let variable: Resolvable
-    let condition: Expression?
-    let elseExpression: Resolvable?
+		let variable: Resolvable
+		let condition: Expression?
+		let elseExpression: Resolvable?
 
-    if hasToken("if", at: 1) {
-      variable = try compileResolvable([components[0]], containedIn: token)
+		if hasToken("if", at: 1) {
+			variable = try compileResolvable([components[0]], containedIn: token)
 
-      let components = components.suffix(from: 2)
-      if let elseIndex = components.firstIndex(of: "else") {
-        condition = try parser.compileExpression(components: Array(components.prefix(upTo: elseIndex)), token: token)
-        let elseToken = Array(components.suffix(from: elseIndex.advanced(by: 1)))
-        elseExpression = try compileResolvable(elseToken, containedIn: token)
-      } else {
-        condition = try parser.compileExpression(components: Array(components), token: token)
-        elseExpression = nil
-      }
-    } else if !components.isEmpty {
-      variable = try compileResolvable(components, containedIn: token)
-      condition = nil
-      elseExpression = nil
-    } else {
-      throw TemplateSyntaxError(reason: "Missing variable name", token: token)
-    }
+			let components = components.suffix(from: 2)
+			if let elseIndex = components.firstIndex(of: "else") {
+				condition = try parser.compileExpression(components: Array(components.prefix(upTo: elseIndex)), token: token)
+				let elseToken = Array(components.suffix(from: elseIndex.advanced(by: 1)))
+				elseExpression = try compileResolvable(elseToken, containedIn: token)
+			} else {
+				condition = try parser.compileExpression(components: Array(components), token: token)
+				elseExpression = nil
+			}
+		} else if !components.isEmpty {
+			variable = try compileResolvable(components, containedIn: token)
+			condition = nil
+			elseExpression = nil
+		} else {
+			throw TemplateSyntaxError(reason: "Missing variable name", token: token)
+		}
 
-    return VariableNode(variable: variable, token: token, condition: condition, elseExpression: elseExpression)
-  }
+		return VariableNode(variable: variable, token: token, condition: condition, elseExpression: elseExpression)
+	}
 
-  public init(variable: Resolvable, token: Token? = nil) {
-    self.variable = variable
-    self.token = token
-    self.condition = nil
-    self.elseExpression = nil
-  }
+	public init(variable: Resolvable, token: Token? = nil) {
+		self.variable = variable
+		self.token = token
+		self.condition = nil
+		self.elseExpression = nil
+	}
 
-  init(variable: Resolvable, token: Token? = nil, condition: Expression?, elseExpression: Resolvable?) {
-    self.variable = variable
-    self.token = token
-    self.condition = condition
-    self.elseExpression = elseExpression
-  }
+	init(variable: Resolvable, token: Token? = nil, condition: Expression?, elseExpression: Resolvable?) {
+		self.variable = variable
+		self.token = token
+		self.condition = condition
+		self.elseExpression = elseExpression
+	}
 
-  public init(variable: String, token: Token? = nil) {
-    self.variable = Variable(variable)
-    self.token = token
-    self.condition = nil
-    self.elseExpression = nil
-  }
+	public init(variable: String, token: Token? = nil) {
+		self.variable = Variable(variable)
+		self.token = token
+		self.condition = nil
+		self.elseExpression = nil
+	}
 
-  public func render(_ context: Context) throws -> String {
-    if let condition = self.condition, try condition.evaluate(context: context) == false {
-      return try elseExpression?.resolve(context).map(stringify) ?? ""
-    }
+	public func render(_ context: Context) throws -> String {
+		if let condition = self.condition, try condition.evaluate(context: context) == false {
+			return try elseExpression?.resolve(context).map(stringify) ?? ""
+		}
 
-    let result = try variable.resolve(context)
-    return stringify(result)
-  }
+		let result = try variable.resolve(context)
+		return stringify(result)
+	}
 }
 
 func stringify(_ result: Any?) -> String {
-  if let result = result as? String {
-    return result
-  } else if let array = result as? [Any?] {
-    return unwrap(array).description
-  } else if let result = result as? CustomStringConvertible {
-    return result.description
-  } else if let result = result as? NSObject {
-    return result.description
-  }
+	if let result = result as? String {
+		return result
+	} else if let array = result as? [Any?] {
+		return unwrap(array).description
+	} else if let result = result as? CustomStringConvertible {
+		return result.description
+	} else if let result = result as? NSObject {
+		return result.description
+	}
 
-  return ""
+	return ""
 }
 
 func unwrap(_ array: [Any?]) -> [Any] {
-  array.map { (item: Any?) -> Any in
-    if let item = item {
-      if let items = item as? [Any?] {
-        return unwrap(items)
-      } else {
-        return item
-      }
-    } else { return item as Any }
-  }
+	array.map { (item: Any?) -> Any in
+		if let item = item {
+			if let items = item as? [Any?] {
+				return unwrap(items)
+			} else {
+				return item
+			}
+		} else {
+			return item as Any
+		}
+	}
 }

Sources/Stencil/NowTag.swift

@@ -1,50 +1,44 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 #if !os(Linux)
 import Foundation
 
 class NowNode: NodeType {
-  let format: Variable
-  let token: Token?
+	let format: Variable
+	let token: Token?
 
-  class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
-    var format: Variable?
+	class func parse(_ parser: TokenParser, token: Token) throws -> NodeType {
+		var format: Variable?
 
-    let components = token.components
-    guard components.count <= 2 else {
-      throw TemplateSyntaxError("'now' tags may only have one argument: the format string.")
-    }
-    if components.count == 2 {
-      format = Variable(components[1])
-    }
+		let components = token.components
+		guard components.count <= 2 else {
+			throw TemplateSyntaxError("'now' tags may only have one argument: the format string.")
+		}
+		if components.count == 2 {
+			format = Variable(components[1])
+		}
 
-    return NowNode(format: format, token: token)
-  }
+		return NowNode(format: format, token: token)
+	}
 
-  init(format: Variable?, token: Token? = nil) {
-    self.format = format ?? Variable("\"yyyy-MM-dd 'at' HH:mm\"")
-    self.token = token
-  }
+	init(format: Variable?, token: Token? = nil) {
+		self.format = format ?? Variable("\"yyyy-MM-dd 'at' HH:mm\"")
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    let date = Date()
-    let format = try self.format.resolve(context)
+	func render(_ context: Context) throws -> String {
+		let date = Date()
+		let format = try self.format.resolve(context)
 
-    var formatter: DateFormatter
-    if let format = format as? DateFormatter {
-      formatter = format
-    } else if let format = format as? String {
-      formatter = DateFormatter()
-      formatter.dateFormat = format
-    } else {
-      return ""
-    }
+		var formatter: DateFormatter
+		if let format = format as? DateFormatter {
+			formatter = format
+		} else if let format = format as? String {
+			formatter = DateFormatter()
+			formatter.dateFormat = format
+		} else {
+			return ""
+		}
 
-    return formatter.string(from: date)
-  }
+		return formatter.string(from: date)
+	}
 }
 #endif

Sources/Stencil/Parser.swift

@@ -1,278 +1,272 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 /// Creates a checker that will stop parsing if it encounters a list of tags.
 /// Useful for example for scanning until a given "end"-node.
 public func until(_ tags: [String]) -> ((TokenParser, Token) -> Bool) {
-  { _, token in
-    if let name = token.components.first {
-      for tag in tags where name == tag {
-        return true
-      }
-    }
+	{ _, token in
+		if let name = token.components.first {
+			for tag in tags where name == tag {
+				return true
+			}
+		}
 
-    return false
-  }
+		return false
+	}
 }
 
 /// A class for parsing an array of tokens and converts them into a collection of Node's
 public class TokenParser {
-  /// Parser for finding a kind of node
-  public typealias TagParser = (TokenParser, Token) throws -> NodeType
+	/// Parser for finding a kind of node
+	public typealias TagParser = (TokenParser, Token) throws -> NodeType
 
-  fileprivate var tokens: [Token]
-  fileprivate(set) var parsedTokens: [Token] = []
-  fileprivate let environment: Environment
-  fileprivate var previousWhiteSpace: WhitespaceBehaviour.Behaviour?
+	fileprivate var tokens: [Token]
+	fileprivate(set) var parsedTokens: [Token] = []
+	fileprivate let environment: Environment
+	fileprivate var previousWhiteSpace: WhitespaceBehaviour.Behaviour?
 
-  /// Simple initializer
-  public init(tokens: [Token], environment: Environment) {
-    self.tokens = tokens
-    self.environment = environment
-  }
+	/// Simple initializer
+	public init(tokens: [Token], environment: Environment) {
+		self.tokens = tokens
+		self.environment = environment
+	}
 
-  /// Parse the given tokens into nodes
-  public func parse() throws -> [NodeType] {
-    try parse(nil)
-  }
+	/// Parse the given tokens into nodes
+	public func parse() throws -> [NodeType] {
+		try parse(nil)
+	}
 
-  /// Parse nodes until a specific "something" is detected, determined by the provided closure.
-  /// Combine this with the `until(:)` function above to scan nodes until a given token.
-  public func parse(_ parseUntil: ((_ parser: TokenParser, _ token: Token) -> (Bool))?) throws -> [NodeType] {
-    var nodes = [NodeType]()
+	/// Parse nodes until a specific "something" is detected, determined by the provided closure.
+	/// Combine this with the `until(:)` function above to scan nodes until a given token.
+	public func parse(_ parseUntil: ((_ parser: TokenParser, _ token: Token) -> (Bool))?) throws -> [NodeType] {
+		var nodes = [NodeType]()
 
-    while !tokens.isEmpty {
-      guard let token = nextToken() else { break }
+		while !tokens.isEmpty {
+			guard let token = nextToken() else { break }
 
-      switch token.kind {
-      case .text:
-        nodes.append(TextNode(text: token.contents, trimBehaviour: trimBehaviour))
-      case .variable:
-        previousWhiteSpace = nil
-        try nodes.append(VariableNode.parse(self, token: token))
-      case .block:
-        previousWhiteSpace = token.whitespace?.trailing
-        if let parseUntil = parseUntil, parseUntil(self, token) {
-          prependToken(token)
-          return nodes
-        }
+			switch token.kind {
+			case .text:
+				nodes.append(TextNode(text: token.contents, trimBehaviour: trimBehaviour))
+			case .variable:
+				previousWhiteSpace = nil
+				try nodes.append(VariableNode.parse(self, token: token))
+			case .block:
+				previousWhiteSpace = token.whitespace?.trailing
+				if let parseUntil = parseUntil, parseUntil(self, token) {
+					prependToken(token)
+					return nodes
+				}
 
-        if var tag = token.components.first {
-          do {
-            // special case for labeled tags (such as for loops)
-            if tag.hasSuffix(":") && token.components.count >= 2 {
-              tag = token.components[1]
-            }
+				if var tag = token.components.first {
+					do {
+						// special case for labeled tags (such as for loops)
+						if tag.hasSuffix(":") && token.components.count >= 2 {
+							tag = token.components[1]
+						}
 
-            let parser = try environment.findTag(name: tag)
-            let node = try parser(self, token)
-            nodes.append(node)
-          } catch {
-            throw error.withToken(token)
-          }
-        }
-      case .comment:
-        previousWhiteSpace = nil
-        continue
-      }
-    }
+						let parser = try environment.findTag(name: tag)
+						let node = try parser(self, token)
+						nodes.append(node)
+					} catch {
+						throw error.withToken(token)
+					}
+				}
+			case .comment:
+				previousWhiteSpace = nil
+				continue
+			}
+		}
 
-    return nodes
-  }
+		return nodes
+	}
 
-  /// Pop the next token (returning it)
-  public func nextToken() -> Token? {
-    if !tokens.isEmpty {
-      let nextToken = tokens.remove(at: 0)
-      parsedTokens.append(nextToken)
-      return nextToken
-    }
+	/// Pop the next token (returning it)
+	public func nextToken() -> Token? {
+		if !tokens.isEmpty {
+			let nextToken = tokens.remove(at: 0)
+			parsedTokens.append(nextToken)
+			return nextToken
+		}
 
-    return nil
-  }
+		return nil
+	}
 
-  func peekWhitespace() -> WhitespaceBehaviour.Behaviour? {
-    tokens.first?.whitespace?.leading
-  }
+	func peekWhitespace() -> WhitespaceBehaviour.Behaviour? {
+		tokens.first?.whitespace?.leading
+	}
 
-  /// Insert a token 
-  public func prependToken(_ token: Token) {
-    tokens.insert(token, at: 0)
-    if parsedTokens.last == token {
-      parsedTokens.removeLast()
-    }
-  }
+	/// Insert a token
+	public func prependToken(_ token: Token) {
+		tokens.insert(token, at: 0)
+		if parsedTokens.last == token {
+			parsedTokens.removeLast()
+		}
+	}
 
-  /// Create filter expression from a string contained in provided token
-  public func compileFilter(_ filterToken: String, containedIn token: Token) throws -> Resolvable {
-    try environment.compileFilter(filterToken, containedIn: token)
-  }
+	/// Create filter expression from a string contained in provided token
+	public func compileFilter(_ filterToken: String, containedIn token: Token) throws -> Resolvable {
+		try environment.compileFilter(filterToken, containedIn: token)
+	}
 
-  /// Create boolean expression from components contained in provided token
-  public func compileExpression(components: [String], token: Token) throws -> Expression {
-    try environment.compileExpression(components: components, containedIn: token)
-  }
+	/// Create boolean expression from components contained in provided token
+	public func compileExpression(components: [String], token: Token) throws -> Expression {
+		try environment.compileExpression(components: components, containedIn: token)
+	}
 
-  /// Create resolvable (i.e. range variable or filter expression) from a string contained in provided token
-  public func compileResolvable(_ token: String, containedIn containingToken: Token) throws -> Resolvable {
-    try environment.compileResolvable(token, containedIn: containingToken)
-  }
+	/// Create resolvable (i.e. range variable or filter expression) from a string contained in provided token
+	public func compileResolvable(_ token: String, containedIn containingToken: Token) throws -> Resolvable {
+		try environment.compileResolvable(token, containedIn: containingToken)
+	}
 
-  private var trimBehaviour: TrimBehaviour {
-    var behaviour: TrimBehaviour = .nothing
+	private var trimBehaviour: TrimBehaviour {
+		var behaviour: TrimBehaviour = .nothing
 
-    if let leading = previousWhiteSpace {
-      if leading == .unspecified {
-        behaviour.leading = environment.trimBehaviour.trailing
-      } else {
-        behaviour.leading = leading == .trim ? .whitespaceAndNewLines : .nothing
-      }
-    }
-    if let trailing = peekWhitespace() {
-      if trailing == .unspecified {
-        behaviour.trailing = environment.trimBehaviour.leading
-      } else {
-        behaviour.trailing = trailing == .trim ? .whitespaceAndNewLines : .nothing
-      }
-    }
+		if let leading = previousWhiteSpace {
+			if leading == .unspecified {
+				behaviour.leading = environment.trimBehaviour.trailing
+			} else {
+				behaviour.leading = leading == .trim ? .whitespaceAndNewLines : .nothing
+			}
+		}
+		if let trailing = peekWhitespace() {
+			if trailing == .unspecified {
+				behaviour.trailing = environment.trimBehaviour.leading
+			} else {
+				behaviour.trailing = trailing == .trim ? .whitespaceAndNewLines : .nothing
+			}
+		}
 
-    return behaviour
-  }
+		return behaviour
+	}
 }
 
 extension Environment {
-  func findTag(name: String) throws -> Extension.TagParser {
-    for ext in extensions {
-      if let filter = ext.tags[name] {
-        return filter
-      }
-    }
+	func findTag(name: String) throws -> Extension.TagParser {
+		for ext in extensions {
+			if let filter = ext.tags[name] {
+				return filter
+			}
+		}
 
-    throw TemplateSyntaxError("Unknown template tag '\(name)'")
-  }
+		throw TemplateSyntaxError("Unknown template tag '\(name)'")
+	}
 
-  func findFilter(_ name: String) throws -> FilterType {
-    for ext in extensions {
-      if let filter = ext.filters[name] {
-        return filter
-      }
-    }
+	func findFilter(_ name: String) throws -> FilterType {
+		for ext in extensions {
+			if let filter = ext.filters[name] {
+				return filter
+			}
+		}
 
-    let suggestedFilters = self.suggestedFilters(for: name)
-    if suggestedFilters.isEmpty {
-      throw TemplateSyntaxError("Unknown filter '\(name)'.")
-    } else {
-      throw TemplateSyntaxError(
-        """
-        Unknown filter '\(name)'. \
-        Found similar filters: \(suggestedFilters.map { "'\($0)'" }.joined(separator: ", ")).
-        """
-      )
-    }
-  }
+		let suggestedFilters = self.suggestedFilters(for: name)
+		if suggestedFilters.isEmpty {
+			throw TemplateSyntaxError("Unknown filter '\(name)'.")
+		} else {
+			throw TemplateSyntaxError(
+				"""
+				Unknown filter '\(name)'. \
+				Found similar filters: \(suggestedFilters.map { "'\($0)'" }.joined(separator: ", ")).
+				"""
+			)
+		}
+	}
 
-  private func suggestedFilters(for name: String) -> [String] {
-    let allFilters = extensions.flatMap { $0.filters.keys }
+	private func suggestedFilters(for name: String) -> [String] {
+		let allFilters = extensions.flatMap { $0.filters.keys }
 
-    let filtersWithDistance = allFilters
-      .map { (filterName: $0, distance: $0.levenshteinDistance(name)) }
-      // do not suggest filters which names are shorter than the distance
-      .filter { $0.filterName.count > $0.distance }
-    guard let minDistance = filtersWithDistance.min(by: { $0.distance < $1.distance })?.distance else {
-      return []
-    }
-    // suggest all filters with the same distance
-    return filtersWithDistance.filter { $0.distance == minDistance }.map { $0.filterName }
-  }
+		let filtersWithDistance = allFilters
+			.map { (filterName: $0, distance: $0.levenshteinDistance(name)) }
+			// do not suggest filters which names are shorter than the distance
+			.filter { $0.filterName.count > $0.distance }
+		guard let minDistance = filtersWithDistance.min(by: { $0.distance < $1.distance })?.distance else {
+			return []
+		}
+		// suggest all filters with the same distance
+		return filtersWithDistance.filter { $0.distance == minDistance }.map { $0.filterName }
+	}
 
-  /// Create filter expression from a string
-  public func compileFilter(_ token: String) throws -> Resolvable {
-    try FilterExpression(token: token, environment: self)
-  }
+	/// Create filter expression from a string
+	public func compileFilter(_ token: String) throws -> Resolvable {
+		try FilterExpression(token: token, environment: self)
+	}
 
-  /// Create filter expression from a string contained in provided token
-  public func compileFilter(_ filterToken: String, containedIn containingToken: Token) throws -> Resolvable {
-    do {
-      return try FilterExpression(token: filterToken, environment: self)
-    } catch {
-      guard var syntaxError = error as? TemplateSyntaxError, syntaxError.token == nil else {
-        throw error
-      }
-      // find offset of filter in the containing token so that only filter is highligted, not the whole token
-      if let filterTokenRange = containingToken.contents.range(of: filterToken) {
-        var location = containingToken.sourceMap.location
-        location.lineOffset += containingToken.contents.distance(
-          from: containingToken.contents.startIndex,
-          to: filterTokenRange.lowerBound
-        )
-        syntaxError.token = .variable(
-          value: filterToken,
-          at: SourceMap(filename: containingToken.sourceMap.filename, location: location)
-        )
-      } else {
-        syntaxError.token = containingToken
-      }
-      throw syntaxError
-    }
-  }
+	/// Create filter expression from a string contained in provided token
+	public func compileFilter(_ filterToken: String, containedIn containingToken: Token) throws -> Resolvable {
+		do {
+			return try FilterExpression(token: filterToken, environment: self)
+		} catch {
+			guard var syntaxError = error as? TemplateSyntaxError, syntaxError.token == nil else {
+				throw error
+			}
+			// find offset of filter in the containing token so that only filter is highligted, not the whole token
+			if let filterTokenRange = containingToken.contents.range(of: filterToken) {
+				var location = containingToken.sourceMap.location
+				location.lineOffset += containingToken.contents.distance(
+					from: containingToken.contents.startIndex,
+					to: filterTokenRange.lowerBound
+				)
+				syntaxError.token = .variable(
+					value: filterToken,
+					at: SourceMap(filename: containingToken.sourceMap.filename, location: location)
+				)
+			} else {
+				syntaxError.token = containingToken
+			}
+			throw syntaxError
+		}
+	}
 
-  /// Create resolvable (i.e. range variable or filter expression) from a string
-  public func compileResolvable(_ token: String) throws -> Resolvable {
-    try RangeVariable(token, environment: self)
-      ?? compileFilter(token)
-  }
+	/// Create resolvable (i.e. range variable or filter expression) from a string
+	public func compileResolvable(_ token: String) throws -> Resolvable {
+		try RangeVariable(token, environment: self)
+			?? compileFilter(token)
+	}
 
-  /// Create resolvable (i.e. range variable or filter expression) from a string contained in provided token
-  public func compileResolvable(_ token: String, containedIn containingToken: Token) throws -> Resolvable {
-    try RangeVariable(token, environment: self, containedIn: containingToken)
-      ?? compileFilter(token, containedIn: containingToken)
-  }
+	/// Create resolvable (i.e. range variable or filter expression) from a string contained in provided token
+	public func compileResolvable(_ token: String, containedIn containingToken: Token) throws -> Resolvable {
+		try RangeVariable(token, environment: self, containedIn: containingToken)
+			?? compileFilter(token, containedIn: containingToken)
+	}
 
-  /// Create boolean expression from components contained in provided token
-  public func compileExpression(components: [String], containedIn token: Token) throws -> Expression {
-    try IfExpressionParser.parser(components: components, environment: self, token: token).parse()
-  }
+	/// Create boolean expression from components contained in provided token
+	public func compileExpression(components: [String], containedIn token: Token) throws -> Expression {
+		try IfExpressionParser.parser(components: components, environment: self, token: token).parse()
+	}
 }
 
 // https://en.wikipedia.org/wiki/Levenshtein_distance#Iterative_with_two_matrix_rows
 extension String {
-  subscript(_ index: Int) -> Character {
-    self[self.index(self.startIndex, offsetBy: index)]
-  }
+	subscript(_ index: Int) -> Character {
+		self[self.index(self.startIndex, offsetBy: index)]
+	}
 
-  func levenshteinDistance(_ target: String) -> Int {
-    // create two work vectors of integer distances
-    var last, current: [Int]
+	func levenshteinDistance(_ target: String) -> Int {
+		// create two work vectors of integer distances
+		var last, current: [Int]
 
-    // initialize v0 (the previous row of distances)
-    // this row is A[0][i]: edit distance for an empty s
-    // the distance is just the number of characters to delete from t
-    last = [Int](0...target.count)
-    current = [Int](repeating: 0, count: target.count + 1)
+		// initialize v0 (the previous row of distances)
+		// this row is A[0][i]: edit distance for an empty s
+		// the distance is just the number of characters to delete from t
+		last = [Int](0...target.count)
+		current = [Int](repeating: 0, count: target.count + 1)
 
-    for selfIndex in 0..<self.count {
-      // calculate v1 (current row distances) from the previous row v0
+		for selfIndex in 0..<self.count {
+			// calculate v1 (current row distances) from the previous row v0
 
-      // first element of v1 is A[i+1][0]
-      //   edit distance is delete (i+1) chars from s to match empty t
-      current[0] = selfIndex + 1
+			// first element of v1 is A[i+1][0]
+			//	 edit distance is delete (i+1) chars from s to match empty t
+			current[0] = selfIndex + 1
 
-      // use formula to fill in the rest of the row
-      for targetIndex in 0..<target.count {
-        current[targetIndex + 1] = Swift.min(
-          last[targetIndex + 1] + 1,
-          current[targetIndex] + 1,
-          last[targetIndex] + (self[selfIndex] == target[targetIndex] ? 0 : 1)
-        )
-      }
+			// use formula to fill in the rest of the row
+			for targetIndex in 0..<target.count {
+				current[targetIndex + 1] = Swift.min(
+					last[targetIndex + 1] + 1,
+					current[targetIndex] + 1,
+					last[targetIndex] + (self[selfIndex] == target[targetIndex] ? 0 : 1)
+				)
+			}
 
-      // copy v1 (current row) to v0 (previous row) for next iteration
-      last = current
-    }
+			// copy v1 (current row) to v0 (previous row) for next iteration
+			last = current
+		}
 
-    return current[target.count]
-  }
+		return current[target.count]
+	}
 }

Sources/Stencil/Template.swift

@@ -1,9 +1,3 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 import PathKit
 
@@ -14,76 +8,80 @@ let NSFileNoSuchFileError = 4
 
 /// A class representing a template
 open class Template: ExpressibleByStringLiteral {
-  let templateString: String
-  var environment: Environment
+	let templateString: String
+	var environment: Environment
 
-  /// The list of parsed (lexed) tokens
-  public let tokens: [Token]
+	/// The list of parsed (lexed) tokens
+	public let tokens: [Token]
 
-  /// The name of the loaded Template if the Template was loaded from a Loader
-  public let name: String?
+	/// The name of the loaded Template if the Template was loaded from a Loader
+	public let name: String?
 
-  /// Create a template with a template string
-  public required init(templateString: String, environment: Environment? = nil, name: String? = nil) {
-    self.environment = environment ?? Environment()
-    self.name = name
-    self.templateString = templateString
+	/// Create a template with a template string
+	public required init(templateString: String, environment: Environment? = nil, name: String? = nil) {
+		self.environment = environment ?? Environment()
+		self.name = name
+		self.templateString = templateString
 
-    let lexer = Lexer(templateName: name, templateString: templateString)
-    tokens = lexer.tokenize()
-  }
+		let lexer = Lexer(templateName: name, templateString: templateString)
+		tokens = lexer.tokenize()
+	}
 
-  /// Create a template with the given name inside the given bundle
-  @available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
-  public convenience init(named: String, inBundle bundle: Bundle? = nil) throws {
-    let useBundle = bundle ?? Bundle.main
-    guard let url = useBundle.url(forResource: named, withExtension: nil) else {
-      throw NSError(domain: NSCocoaErrorDomain, code: NSFileNoSuchFileError, userInfo: nil)
-    }
+	/// Create a template with the given name inside the given bundle
+	@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
+	public convenience init(named: String, inBundle bundle: Bundle? = nil) throws {
+		let useBundle = bundle ?? Bundle.main
+		guard let url = useBundle.url(forResource: named, withExtension: nil) else {
+			throw NSError(domain: NSCocoaErrorDomain, code: NSFileNoSuchFileError, userInfo: nil)
+		}
 
-    try self.init(URL: url)
-  }
+		try self.init(URL: url)
+	}
 
-  /// Create a template with a file found at the given URL
-  @available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
-  public convenience init(URL: Foundation.URL) throws {
-    try self.init(path: Path(URL.path))
-  }
+	/// Create a template with a file found at the given URL
+	@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
+	public convenience init(URL: Foundation.URL) throws {
+		guard let path = Path(url: URL) else {
+			throw TemplateDoesNotExist(templateNames: [URL.lastPathComponent])
+		}
+		try self.init(path: path)
+	}
 
-  /// Create a template with a file found at the given path
-  @available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
-  public convenience init(path: Path, environment: Environment? = nil, name: String? = nil) throws {
-    self.init(templateString: try path.read(), environment: environment, name: name)
-  }
+	/// Create a template with a file found at the given path
+	@available(*, deprecated, message: "Use Environment/FileSystemLoader instead")
+	public convenience init(path: Path, environment: Environment? = nil, name: String? = nil) throws {
+		let value = try String(contentsOf: path)
+		self.init(templateString: value, environment: environment, name: name)
+	}
 
-  // MARK: ExpressibleByStringLiteral
+	// MARK: ExpressibleByStringLiteral
 
-  // Create a templaVte with a template string literal
-  public required convenience init(stringLiteral value: String) {
-    self.init(templateString: value)
-  }
+	// Create a templaVte with a template string literal
+	public required convenience init(stringLiteral value: String) {
+		self.init(templateString: value)
+	}
 
-  // Create a template with a template string literal
-  public required convenience init(extendedGraphemeClusterLiteral value: StringLiteralType) {
-    self.init(stringLiteral: value)
-  }
+	// Create a template with a template string literal
+	public required convenience init(extendedGraphemeClusterLiteral value: StringLiteralType) {
+		self.init(stringLiteral: value)
+	}
 
-  // Create a template with a template string literal
-  public required convenience init(unicodeScalarLiteral value: StringLiteralType) {
-    self.init(stringLiteral: value)
-  }
+	// Create a template with a template string literal
+	public required convenience init(unicodeScalarLiteral value: StringLiteralType) {
+		self.init(stringLiteral: value)
+	}
 
-  /// Render the given template with a context
-  public func render(_ context: Context) throws -> String {
-    let context = context
-    let parser = TokenParser(tokens: tokens, environment: context.environment)
-    let nodes = try parser.parse()
-    return try renderNodes(nodes, context)
-  }
+	/// Render the given template with a context
+	public func render(_ context: Context) throws -> String {
+		let context = context
+		let parser = TokenParser(tokens: tokens, environment: context.environment)
+		let nodes = try parser.parse()
+		return try renderNodes(nodes, context)
+	}
 
-  // swiftlint:disable discouraged_optional_collection
-  /// Render the given template
-  open func render(_ dictionary: [String: Any]? = nil) throws -> String {
-    try render(Context(dictionary: dictionary ?? [:], environment: environment))
-  }
+	/// Render the given template
+	// swiftlint:disable:next discouraged_optional_collection
+	open func render(_ dictionary: [String: Any]? = nil) throws -> String {
+		try render(Context(dictionary: dictionary ?? [:], environment: environment))
+	}
 }

Sources/Stencil/Tokenizer.swift

@@ -1,160 +1,154 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 extension String {
-  /// Split a string by a separator leaving quoted phrases together
-  func smartSplit(separator: Character = " ") -> [String] {
-    var word = ""
-    var components: [String] = []
-    var separate: Character = separator
-    var singleQuoteCount = 0
-    var doubleQuoteCount = 0
+	/// Split a string by a separator leaving quoted phrases together
+	func smartSplit(separator: Character = " ") -> [String] {
+		var word = ""
+		var components: [String] = []
+		var separate: Character = separator
+		var singleQuoteCount = 0
+		var doubleQuoteCount = 0
 
-    for character in self {
-      if character == "'" {
-        singleQuoteCount += 1
-      } else if character == "\"" {
-        doubleQuoteCount += 1
-      }
+		for character in self {
+			if character == "'" {
+				singleQuoteCount += 1
+			} else if character == "\"" {
+				doubleQuoteCount += 1
+			}
 
-      if character == separate {
-        if separate != separator {
-          word.append(separate)
-        } else if (singleQuoteCount.isMultiple(of: 2) || doubleQuoteCount.isMultiple(of: 2)) && !word.isEmpty {
-          appendWord(word, to: &components)
-          word = ""
-        }
+			if character == separate {
+				if separate != separator {
+					word.append(separate)
+				} else if (singleQuoteCount.isMultiple(of: 2) || doubleQuoteCount.isMultiple(of: 2)) && !word.isEmpty {
+					appendWord(word, to: &components)
+					word = ""
+				}
 
-        separate = separator
-      } else {
-        if separate == separator && (character == "'" || character == "\"") {
-          separate = character
-        }
-        word.append(character)
-      }
-    }
+				separate = separator
+			} else {
+				if separate == separator && (character == "'" || character == "\"") {
+					separate = character
+				}
+				word.append(character)
+			}
+		}
 
-    if !word.isEmpty {
-      appendWord(word, to: &components)
-    }
+		if !word.isEmpty {
+			appendWord(word, to: &components)
+		}
 
-    return components
-  }
+		return components
+	}
 
-  private func appendWord(_ word: String, to components: inout [String]) {
-    let specialCharacters = ",|:"
+	private func appendWord(_ word: String, to components: inout [String]) {
+		let specialCharacters = ",|:"
 
-    if !components.isEmpty {
-      if let precedingChar = components.last?.last, specialCharacters.contains(precedingChar) {
-        // special case for labeled for-loops
-        if components.count == 1 && word == "for" {
-          components.append(word)
-        } else {
-          components[components.count - 1] += word
-        }
-      } else if specialCharacters.contains(word) {
-        components[components.count - 1] += word
-      } else if word != "(" && word.first == "(" || word != ")" && word.first == ")" {
-        components.append(String(word.prefix(1)))
-        appendWord(String(word.dropFirst()), to: &components)
-      } else if word != "(" && word.last == "(" || word != ")" && word.last == ")" {
-        appendWord(String(word.dropLast()), to: &components)
-        components.append(String(word.suffix(1)))
-      } else {
-        components.append(word)
-      }
-    } else {
-      components.append(word)
-    }
-  }
+		if !components.isEmpty {
+			if let precedingChar = components.last?.last, specialCharacters.contains(precedingChar) {
+				// special case for labeled for-loops
+				if components.count == 1 && word == "for" {
+					components.append(word)
+				} else {
+					components[components.count - 1] += word
+				}
+			} else if specialCharacters.contains(word) {
+				components[components.count - 1] += word
+			} else if word != "(" && word.first == "(" || word != ")" && word.first == ")" {
+				components.append(String(word.prefix(1)))
+				appendWord(String(word.dropFirst()), to: &components)
+			} else if word != "(" && word.last == "(" || word != ")" && word.last == ")" {
+				appendWord(String(word.dropLast()), to: &components)
+				components.append(String(word.suffix(1)))
+			} else {
+				components.append(word)
+			}
+		} else {
+			components.append(word)
+		}
+	}
 }
 
 public struct SourceMap: Equatable {
-  public let filename: String?
-  public let location: ContentLocation
+	public let filename: String?
+	public let location: ContentLocation
 
-  init(filename: String? = nil, location: ContentLocation = ("", 0, 0)) {
-    self.filename = filename
-    self.location = location
-  }
+	init(filename: String? = nil, location: ContentLocation = ("", 0, 0)) {
+		self.filename = filename
+		self.location = location
+	}
 
-  static let unknown = SourceMap()
+  static let unknown = Self()
 
-  public static func == (lhs: SourceMap, rhs: SourceMap) -> Bool {
+  public static func == (lhs: Self, rhs: Self) -> Bool {
     lhs.filename == rhs.filename && lhs.location == rhs.location
   }
 }
 
 public struct WhitespaceBehaviour: Equatable {
-  public enum Behaviour {
-    case unspecified
-    case trim
-    case keep
-  }
+	public enum Behaviour {
+		case unspecified
+		case trim
+		case keep
+	}
 
-  let leading: Behaviour
-  let trailing: Behaviour
+	let leading: Behaviour
+	let trailing: Behaviour
 
-  public static let unspecified = WhitespaceBehaviour(leading: .unspecified, trailing: .unspecified)
+	public static let unspecified = Self(leading: .unspecified, trailing: .unspecified)
 }
 
 public class Token: Equatable {
-  public enum Kind: Equatable {
-    /// A token representing a piece of text.
-    case text
-    /// A token representing a variable.
-    case variable
-    /// A token representing a comment.
-    case comment
-    /// A token representing a template block.
-    case block
-  }
+	public enum Kind: Equatable {
+		/// A token representing a piece of text.
+		case text
+		/// A token representing a variable.
+		case variable
+		/// A token representing a comment.
+		case comment
+		/// A token representing a template block.
+		case block
+	}
 
-  public let contents: String
-  public let kind: Kind
-  public let sourceMap: SourceMap
-  public var whitespace: WhitespaceBehaviour?
+	public let contents: String
+	public let kind: Kind
+	public let sourceMap: SourceMap
+	public var whitespace: WhitespaceBehaviour?
 
-  /// Returns the underlying value as an array seperated by spaces
-  public private(set) lazy var components: [String] = self.contents.smartSplit()
+	/// Returns the underlying value as an array seperated by spaces
+	public private(set) lazy var components: [String] = self.contents.smartSplit()
 
-  init(contents: String, kind: Kind, sourceMap: SourceMap, whitespace: WhitespaceBehaviour? = nil) {
-    self.contents = contents
-    self.kind = kind
-    self.sourceMap = sourceMap
-    self.whitespace = whitespace
-  }
+	init(contents: String, kind: Kind, sourceMap: SourceMap, whitespace: WhitespaceBehaviour? = nil) {
+		self.contents = contents
+		self.kind = kind
+		self.sourceMap = sourceMap
+		self.whitespace = whitespace
+	}
 
-  /// A token representing a piece of text.
-  public static func text(value: String, at sourceMap: SourceMap) -> Token {
-    Token(contents: value, kind: .text, sourceMap: sourceMap)
-  }
+	/// A token representing a piece of text.
+	public static func text(value: String, at sourceMap: SourceMap) -> Token {
+		Token(contents: value, kind: .text, sourceMap: sourceMap)
+	}
 
-  /// A token representing a variable.
-  public static func variable(value: String, at sourceMap: SourceMap) -> Token {
-    Token(contents: value, kind: .variable, sourceMap: sourceMap)
-  }
+	/// A token representing a variable.
+	public static func variable(value: String, at sourceMap: SourceMap) -> Token {
+		Token(contents: value, kind: .variable, sourceMap: sourceMap)
+	}
 
-  /// A token representing a comment.
-  public static func comment(value: String, at sourceMap: SourceMap) -> Token {
-    Token(contents: value, kind: .comment, sourceMap: sourceMap)
-  }
+	/// A token representing a comment.
+	public static func comment(value: String, at sourceMap: SourceMap) -> Token {
+		Token(contents: value, kind: .comment, sourceMap: sourceMap)
+	}
 
-  /// A token representing a template block.
-  public static func block(
-    value: String,
-    at sourceMap: SourceMap,
-    whitespace: WhitespaceBehaviour = .unspecified
-  ) -> Token {
-    Token(contents: value, kind: .block, sourceMap: sourceMap, whitespace: whitespace)
-  }
+	/// A token representing a template block.
+	public static func block(
+		value: String,
+		at sourceMap: SourceMap,
+		whitespace: WhitespaceBehaviour = .unspecified
+	) -> Token {
+		Token(contents: value, kind: .block, sourceMap: sourceMap, whitespace: whitespace)
+	}
 
-  public static func == (lhs: Token, rhs: Token) -> Bool {
-    lhs.contents == rhs.contents && lhs.kind == rhs.kind && lhs.sourceMap == rhs.sourceMap
-  }
+	public static func == (lhs: Token, rhs: Token) -> Bool {
+		lhs.contents == rhs.contents && lhs.kind == rhs.kind && lhs.sourceMap == rhs.sourceMap
+	}
 }

Sources/Stencil/TrimBehaviour.swift

@@ -1,76 +1,75 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 public struct TrimBehaviour: Equatable {
-  var leading: Trim
-  var trailing: Trim
+	var leading: Trim
+	var trailing: Trim
 
-  public enum Trim {
-    /// nothing
-    case nothing
+	public enum Trim {
+		/// nothing
+		case nothing
 
-    /// tabs and spaces
-    case whitespace
+		/// tabs and spaces
+		case whitespace
 
-    /// tabs and spaces and a single new line
-    case whitespaceAndOneNewLine
+		/// tabs and spaces and a single new line
+		case whitespaceAndOneNewLine
 
-    /// all tabs spaces and newlines
-    case whitespaceAndNewLines
-  }
+		/// all tabs spaces and newlines
+		case whitespaceAndNewLines
+	}
 
-  public init(leading: Trim, trailing: Trim) {
-    self.leading = leading
-    self.trailing = trailing
-  }
+	public init(leading: Trim, trailing: Trim) {
+		self.leading = leading
+		self.trailing = trailing
+	}
 
-  /// doesn't touch newlines
-  public static let nothing = TrimBehaviour(leading: .nothing, trailing: .nothing)
+	/// doesn't touch newlines
+	public static let nothing = Self(leading: .nothing, trailing: .nothing)
 
-  /// removes whitespace before a block and whitespace and a single newline after a block
-  public static let smart = TrimBehaviour(leading: .whitespace, trailing: .whitespaceAndOneNewLine)
+	/// removes whitespace before a block and whitespace and a single newline after a block
+	public static let smart = Self(leading: .whitespace, trailing: .whitespaceAndOneNewLine)
 
-  /// removes all whitespace and newlines before and after a block
-  public static let all = TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .whitespaceAndNewLines)
+	/// removes all whitespace and newlines before and after a block
+	public static let all = Self(leading: .whitespaceAndNewLines, trailing: .whitespaceAndNewLines)
 
-  static func leadingRegex(trim: Trim) -> NSRegularExpression {
-    switch trim {
-    case .nothing:
-      fatalError("No RegularExpression for none")
-    case .whitespace:
-      return Self.leadingWhitespace
-    case .whitespaceAndOneNewLine:
-      return Self.leadingWhitespaceAndOneNewLine
-    case .whitespaceAndNewLines:
-      return Self.leadingWhitespaceAndNewlines
-    }
-  }
+	static func leadingRegex(trim: Trim) -> NSRegularExpression {
+		switch trim {
+		case .nothing:
+			fatalError("No RegularExpression for none")
+		case .whitespace:
+			return Self.leadingWhitespace
+		case .whitespaceAndOneNewLine:
+			return Self.leadingWhitespaceAndOneNewLine
+		case .whitespaceAndNewLines:
+			return Self.leadingWhitespaceAndNewlines
+		}
+	}
 
-  static func trailingRegex(trim: Trim) -> NSRegularExpression {
-    switch trim {
-    case .nothing:
-      fatalError("No RegularExpression for none")
-    case .whitespace:
-      return Self.trailingWhitespace
-    case .whitespaceAndOneNewLine:
-      return Self.trailingWhitespaceAndOneNewLine
-    case .whitespaceAndNewLines:
-      return Self.trailingWhitespaceAndNewLines
-    }
-  }
+	static func trailingRegex(trim: Trim) -> NSRegularExpression {
+		switch trim {
+		case .nothing:
+			fatalError("No RegularExpression for none")
+		case .whitespace:
+			return Self.trailingWhitespace
+		case .whitespaceAndOneNewLine:
+			return Self.trailingWhitespaceAndOneNewLine
+		case .whitespaceAndNewLines:
+			return Self.trailingWhitespaceAndNewLines
+		}
+	}
 
-  // swiftlint:disable force_try
-  private static let leadingWhitespaceAndNewlines = try! NSRegularExpression(pattern: "^\\s+")
-  private static let trailingWhitespaceAndNewLines = try! NSRegularExpression(pattern: "\\s+$")
+	// swiftlint:disable:next force_try
+	private static let leadingWhitespaceAndNewlines = try! NSRegularExpression(pattern: "^\\s+")
+	// swiftlint:disable:next force_try
+	private static let trailingWhitespaceAndNewLines = try! NSRegularExpression(pattern: "\\s+$")
 
-  private static let leadingWhitespaceAndOneNewLine = try! NSRegularExpression(pattern: "^[ \t]*\n")
-  private static let trailingWhitespaceAndOneNewLine = try! NSRegularExpression(pattern: "\n[ \t]*$")
+	// swiftlint:disable:next force_try
+	private static let leadingWhitespaceAndOneNewLine = try! NSRegularExpression(pattern: "^[ \t]*\n")
+	// swiftlint:disable:next force_try
+	private static let trailingWhitespaceAndOneNewLine = try! NSRegularExpression(pattern: "\n[ \t]*$")
 
-  private static let leadingWhitespace = try! NSRegularExpression(pattern: "^[ \t]*")
-  private static let trailingWhitespace = try! NSRegularExpression(pattern: "[ \t]*$")
+	// swiftlint:disable:next force_try
+	private static let leadingWhitespace = try! NSRegularExpression(pattern: "^[ \t]*")
+	// swiftlint:disable:next force_try
+	private static let trailingWhitespace = try! NSRegularExpression(pattern: "[ \t]*$")
 }

Sources/Stencil/Variable.swift

@@ -1,159 +1,153 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Foundation
 
 typealias Number = Float
 
 class FilterExpression: Resolvable {
-  let filters: [(FilterType, [Variable])]
-  let variable: Variable
+	let filters: [(FilterType, [Variable])]
+	let variable: Variable
 
-  init(token: String, environment: Environment) throws {
-    let bits = token.smartSplit(separator: "|").map { String($0).trim(character: " ") }
-    if bits.isEmpty {
-      throw TemplateSyntaxError("Variable tags must include at least 1 argument")
-    }
+	init(token: String, environment: Environment) throws {
+		let bits = token.smartSplit(separator: "|").map { String($0).trim(character: " ") }
+		if bits.isEmpty {
+			throw TemplateSyntaxError("Variable tags must include at least 1 argument")
+		}
 
-    variable = Variable(bits[0])
-    let filterBits = bits[bits.indices.suffix(from: 1)]
+		variable = Variable(bits[0])
+		let filterBits = bits[bits.indices.suffix(from: 1)]
 
-    do {
-      filters = try filterBits.map { bit in
-        let (name, arguments) = parseFilterComponents(token: bit)
-        let filter = try environment.findFilter(name)
-        return (filter, arguments)
-      }
-    } catch {
-      filters = []
-      throw error
-    }
-  }
+		do {
+			filters = try filterBits.map { bit in
+				let (name, arguments) = parseFilterComponents(token: bit)
+				let filter = try environment.findFilter(name)
+				return (filter, arguments)
+			}
+		} catch {
+			filters = []
+			throw error
+		}
+	}
 
-  func resolve(_ context: Context) throws -> Any? {
-    let result = try variable.resolve(context)
+	func resolve(_ context: Context) throws -> Any? {
+		let result = try variable.resolve(context)
 
-    return try filters.reduce(result) { value, filter in
-      let arguments = try filter.1.map { try $0.resolve(context) }
-      return try filter.0.invoke(value: value, arguments: arguments, context: context)
-    }
-  }
+		return try filters.reduce(result) { value, filter in
+			let arguments = try filter.1.map { try $0.resolve(context) }
+			return try filter.0.invoke(value: value, arguments: arguments, context: context)
+		}
+	}
 }
 
 /// A structure used to represent a template variable, and to resolve it in a given context.
 public struct Variable: Equatable, Resolvable {
-  public let variable: String
+	public let variable: String
 
-  /// Create a variable with a string representing the variable
-  public init(_ variable: String) {
-    self.variable = variable
-  }
+	/// Create a variable with a string representing the variable
+	public init(_ variable: String) {
+		self.variable = variable
+	}
 
-  /// Resolve the variable in the given context
-  public func resolve(_ context: Context) throws -> Any? {
-    if variable.count > 1 &&
-      ((variable.hasPrefix("'") && variable.hasSuffix("'")) || (variable.hasPrefix("\"") && variable.hasSuffix("\""))) {
-      // String literal
-      return String(variable[variable.index(after: variable.startIndex) ..< variable.index(before: variable.endIndex)])
-    }
+	/// Resolve the variable in the given context
+	public func resolve(_ context: Context) throws -> Any? {
+		if variable.count > 1 &&
+			((variable.hasPrefix("'") && variable.hasSuffix("'")) || (variable.hasPrefix("\"") && variable.hasSuffix("\""))) {
+			// String literal
+			return String(variable[variable.index(after: variable.startIndex) ..< variable.index(before: variable.endIndex)])
+		}
 
-    // Number literal
-    if let int = Int(variable) {
-      return int
-    }
-    if let number = Number(variable) {
-      return number
-    }
-    // Boolean literal
-    if let bool = Bool(variable) {
-      return bool
-    }
+		// Number literal
+		if let int = Int(variable) {
+			return int
+		}
+		if let number = Number(variable) {
+			return number
+		}
+		// Boolean literal
+		if let bool = Bool(variable) {
+			return bool
+		}
 
-    var current: Any? = context
-    for bit in try lookup(context) {
-      current = resolve(bit: bit, context: current)
+		var current: Any? = context
+		for bit in try lookup(context) {
+			current = resolve(bit: bit, context: current)
 
-      if current == nil {
-        return nil
-      } else if let lazyCurrent = current as? LazyValueWrapper {
-        current = try lazyCurrent.value(context: context)
-      }
-    }
+			if current == nil {
+				return nil
+			} else if let lazyCurrent = current as? LazyValueWrapper {
+				current = try lazyCurrent.value(context: context)
+			}
+		}
 
-    if let resolvable = current as? Resolvable {
-      current = try resolvable.resolve(context)
-    } else if let node = current as? NodeType {
-      current = try node.render(context)
-    }
+		if let resolvable = current as? Resolvable {
+			current = try resolvable.resolve(context)
+		} else if let node = current as? NodeType {
+			current = try node.render(context)
+		}
 
-    return normalize(current)
-  }
+		return normalize(current)
+	}
 
-  // Split the lookup string and resolve references if possible
-  private func lookup(_ context: Context) throws -> [String] {
-    let keyPath = KeyPath(variable, in: context)
-    return try keyPath.parse()
-  }
+	// Split the lookup string and resolve references if possible
+	private func lookup(_ context: Context) throws -> [String] {
+		let keyPath = KeyPath(variable, in: context)
+		return try keyPath.parse()
+	}
 
-  // Try to resolve a partial keypath for the given context
-  private func resolve(bit: String, context: Any?) -> Any? {
-    let context = normalize(context)
+	// Try to resolve a partial keypath for the given context
+	private func resolve(bit: String, context: Any?) -> Any? {
+		let context = normalize(context)
 
-    if let context = context as? Context {
-      return context[bit]
-    } else if let dictionary = context as? [String: Any] {
-      return resolve(bit: bit, dictionary: dictionary)
-    } else if let array = context as? [Any] {
-      return resolve(bit: bit, collection: array)
-    } else if let string = context as? String {
-      return resolve(bit: bit, collection: string)
-    } else if let object = context as? NSObject {  // NSKeyValueCoding
-      #if os(Linux)
-        return nil
-      #else
-        if object.responds(to: Selector(bit)) {
-          return object.value(forKey: bit)
-        }
-      #endif
-    } else if let value = context as? DynamicMemberLookup {
-      return value[dynamicMember: bit]
-    } else if let value = context {
-      return Mirror(reflecting: value).getValue(for: bit)
-    }
+		if let context = context as? Context {
+			return context[bit]
+		} else if let dictionary = context as? [String: Any] {
+			return resolve(bit: bit, dictionary: dictionary)
+		} else if let array = context as? [Any] {
+			return resolve(bit: bit, collection: array)
+		} else if let string = context as? String {
+			return resolve(bit: bit, collection: string)
+		} else if let value = context as? DynamicMemberLookup {
+			return value[dynamicMember: bit]
+		} else if let object = context as? NSObject {	 // NSKeyValueCoding
+			#if canImport(ObjectiveC)
+				if object.responds(to: Selector(bit)) {
+					return object.value(forKey: bit)
+				}
+			#else
+				return nil
+			#endif
+		} else if let value = context {
+			return Mirror(reflecting: value).getValue(for: bit)
+		}
 
-    return nil
-  }
+		return nil
+	}
 
-  // Try to resolve a partial keypath for the given dictionary
-  private func resolve(bit: String, dictionary: [String: Any]) -> Any? {
-    if bit == "count" {
-      return dictionary.count
-    } else {
-      return dictionary[bit]
-    }
-  }
+	// Try to resolve a partial keypath for the given dictionary
+	private func resolve(bit: String, dictionary: [String: Any]) -> Any? {
+		if bit == "count" {
+			return dictionary.count
+		} else {
+			return dictionary[bit]
+		}
+	}
 
-  // Try to resolve a partial keypath for the given collection
-  private func resolve<T: Collection>(bit: String, collection: T) -> Any? {
-    if let index = Int(bit) {
-      if index >= 0 && index < collection.count {
-        return collection[collection.index(collection.startIndex, offsetBy: index)]
-      } else {
-        return nil
-      }
-    } else if bit == "first" {
-      return collection.first
-    } else if bit == "last" {
-      return collection[collection.index(collection.endIndex, offsetBy: -1)]
-    } else if bit == "count" {
-      return collection.count
-    } else {
-      return nil
-    }
-  }
+	// Try to resolve a partial keypath for the given collection
+	private func resolve<T: Collection>(bit: String, collection: T) -> Any? {
+		if let index = Int(bit) {
+			if index >= 0 && index < collection.count {
+				return collection[collection.index(collection.startIndex, offsetBy: index)]
+			} else {
+				return nil
+			}
+		} else if bit == "first" {
+			return collection.first
+		} else if bit == "last" {
+			return collection[collection.index(collection.endIndex, offsetBy: -1)]
+		} else if bit == "count" {
+			return collection.count
+		} else {
+			return nil
+		}
+	}
 }
 
 /// A structure used to represet range of two integer values expressed as `from...to`.
@@ -161,131 +155,131 @@ public struct Variable: Equatable, Resolvable {
 /// Rendering this variable produces array from range `from...to`.
 /// If `from` is more than `to` array will contain values of reversed range.
 public struct RangeVariable: Resolvable {
-  public let from: Resolvable
-  // swiftlint:disable:next identifier_name
-  public let to: Resolvable
+	public let from: Resolvable
+	// swiftlint:disable:next identifier_name
+	public let to: Resolvable
 
-  public init?(_ token: String, environment: Environment) throws {
-    let components = token.components(separatedBy: "...")
-    guard components.count == 2 else {
-      return nil
-    }
+	public init?(_ token: String, environment: Environment) throws {
+		let components = token.components(separatedBy: "...")
+		guard components.count == 2 else {
+			return nil
+		}
 
-    self.from = try environment.compileFilter(components[0])
-    self.to = try environment.compileFilter(components[1])
-  }
+		self.from = try environment.compileFilter(components[0])
+		self.to = try environment.compileFilter(components[1])
+	}
 
-  public init?(_ token: String, environment: Environment, containedIn containingToken: Token) throws {
-    let components = token.components(separatedBy: "...")
-    guard components.count == 2 else {
-      return nil
-    }
+	public init?(_ token: String, environment: Environment, containedIn containingToken: Token) throws {
+		let components = token.components(separatedBy: "...")
+		guard components.count == 2 else {
+			return nil
+		}
 
-    self.from = try environment.compileFilter(components[0], containedIn: containingToken)
-    self.to = try environment.compileFilter(components[1], containedIn: containingToken)
-  }
+		self.from = try environment.compileFilter(components[0], containedIn: containingToken)
+		self.to = try environment.compileFilter(components[1], containedIn: containingToken)
+	}
 
-  public func resolve(_ context: Context) throws -> Any? {
-    let lowerResolved = try from.resolve(context)
-    let upperResolved = try to.resolve(context)
+	public func resolve(_ context: Context) throws -> Any? {
+		let lowerResolved = try from.resolve(context)
+		let upperResolved = try to.resolve(context)
 
-    guard let lower = lowerResolved.flatMap(toNumber(value:)).flatMap(Int.init) else {
-      throw TemplateSyntaxError("'from' value is not an Integer (\(lowerResolved ?? "nil"))")
-    }
+		guard let lower = lowerResolved.flatMap(toNumber(value:)).flatMap(Int.init) else {
+			throw TemplateSyntaxError("'from' value is not an Integer (\(lowerResolved ?? "nil"))")
+		}
 
-    guard let upper = upperResolved.flatMap(toNumber(value:)).flatMap(Int.init) else {
-      throw TemplateSyntaxError("'to' value is not an Integer (\(upperResolved ?? "nil") )")
-    }
+		guard let upper = upperResolved.flatMap(toNumber(value:)).flatMap(Int.init) else {
+			throw TemplateSyntaxError("'to' value is not an Integer (\(upperResolved ?? "nil") )")
+		}
 
-    let range = min(lower, upper)...max(lower, upper)
-    return lower > upper ? Array(range.reversed()) : Array(range)
-  }
+		let range = min(lower, upper)...max(lower, upper)
+		return lower > upper ? Array(range.reversed()) : Array(range)
+	}
 }
 
 func normalize(_ current: Any?) -> Any? {
-  if let current = current as? Normalizable {
-    return current.normalize()
-  }
+	if let current = current as? Normalizable {
+		return current.normalize()
+	}
 
-  return current
+	return current
 }
 
 protocol Normalizable {
-  func normalize() -> Any?
+	func normalize() -> Any?
 }
 
 extension Array: Normalizable {
-  func normalize() -> Any? {
-    map { $0 as Any }
-  }
+	func normalize() -> Any? {
+		map { $0 as Any }
+	}
 }
 
 // swiftlint:disable:next legacy_objc_type
 extension NSArray: Normalizable {
-  func normalize() -> Any? {
-    map { $0 as Any }
-  }
+	func normalize() -> Any? {
+		map { $0 as Any }
+	}
 }
 
 extension Dictionary: Normalizable {
-  func normalize() -> Any? {
-    var dictionary: [String: Any] = [:]
+	func normalize() -> Any? {
+		var dictionary: [String: Any] = [:]
 
-    for (key, value) in self {
-      if let key = key as? String {
-        dictionary[key] = Stencil.normalize(value)
-      } else if let key = key as? CustomStringConvertible {
-        dictionary[key.description] = Stencil.normalize(value)
-      }
-    }
+		for (key, value) in self {
+			if let key = key as? String {
+				dictionary[key] = Stencil.normalize(value)
+			} else if let key = key as? CustomStringConvertible {
+				dictionary[key.description] = Stencil.normalize(value)
+			}
+		}
 
-    return dictionary
-  }
+		return dictionary
+	}
 }
 
 func parseFilterComponents(token: String) -> (String, [Variable]) {
-  var components = token.smartSplit(separator: ":")
-  let name = components.removeFirst().trim(character: " ")
-  let variables = components
-    .joined(separator: ":")
-    .smartSplit(separator: ",")
-    .map { Variable($0.trim(character: " ")) }
-  return (name, variables)
+	var components = token.smartSplit(separator: ":")
+	let name = components.removeFirst().trim(character: " ")
+	let variables = components
+		.joined(separator: ":")
+		.smartSplit(separator: ",")
+		.map { Variable($0.trim(character: " ")) }
+	return (name, variables)
 }
 
 extension Mirror {
-  func getValue(for key: String) -> Any? {
-    let result = descendant(key) ?? Int(key).flatMap { descendant($0) }
-    if result == nil {
-      // go through inheritance chain to reach superclass properties
-      return superclassMirror?.getValue(for: key)
-    } else if let result = result {
-      guard String(describing: result) != "nil" else {
-        // mirror returns non-nil value even for nil-containing properties
-        // so we have to check if its value is actually nil or not
-        return nil
-      }
-      if let result = (result as? AnyOptional)?.wrapped {
-        return result
-      } else {
-        return result
-      }
-    }
-    return result
-  }
+	func getValue(for key: String) -> Any? {
+		let result = descendant(key) ?? Int(key).flatMap { descendant($0) }
+		if result == nil {
+			// go through inheritance chain to reach superclass properties
+			return superclassMirror?.getValue(for: key)
+		} else if let result = result {
+			guard String(describing: result) != "nil" else {
+				// mirror returns non-nil value even for nil-containing properties
+				// so we have to check if its value is actually nil or not
+				return nil
+			}
+			if let result = (result as? AnyOptional)?.wrapped {
+				return result
+			} else {
+				return result
+			}
+		}
+		return result
+	}
 }
 
 protocol AnyOptional {
-  var wrapped: Any? { get }
+	var wrapped: Any? { get }
 }
 
 extension Optional: AnyOptional {
-  var wrapped: Any? {
-    switch self {
-    case let .some(value):
-      return value
-    case .none:
-      return nil
-    }
-  }
+	var wrapped: Any? {
+		switch self {
+		case let .some(value):
+			return value
+		case .none:
+			return nil
+		}
+	}
 }

Stencil.podspec.json

@@ -1,19 +1,18 @@
 {
   "name": "Stencil",
-  "version": "0.15.0",
+  "version": "0.15.2",
   "summary": "Stencil is a simple and powerful template language for Swift.",
-  "homepage": "https://stencil.fuller.li",
   "license": {
     "type": "BSD",
     "file": "LICENSE"
   },
   "authors": {
-    "Kyle Fuller": "kyle@fuller.li"
+    "Thomas Bernstein": "developer@astzweig.kg"
   },
-  "social_media_url": "https://twitter.com/kylefuller",
+  "social_media_url": "https://twitter.com/trbernstein",
   "source": {
-    "git": "https://github.com/stencilproject/Stencil.git",
-    "tag": "0.15.0"
+    "git": "https://github.com/swiftstencil/swiftpm-stencil.git",
+    "tag": "0.15.2"
   },
   "source_files": [
     "Sources/Stencil/*.swift"
@@ -23,14 +22,13 @@
     "osx": "10.9",
     "tvos": "9.0"
   },
-  "cocoapods_version": ">= 1.7.0",
   "swift_versions": [
     "5.0"
   ],
   "requires_arc": true,
   "dependencies": {
     "PathKit": [
-      "~> 1.0.0"
+      "~> 1.5.0"
     ]
   }
 }

Tests/StencilTests/ContextSpec.swift

@@ -1,166 +1,160 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class ContextTests: XCTestCase {
-  func testContextSubscripting() {
-    describe("Context Subscripting") { test in
-      var context = Context()
-      test.before {
-        context = Context(dictionary: ["name": "Kyle"])
-      }
+	func testContextSubscripting() {
+		describe("Context Subscripting") { test in
+			var context = Context()
+			test.before {
+				context = Context(dictionary: ["name": "Kyle"])
+			}
 
-      test.it("allows you to get a value via subscripting") {
-        try expect(context["name"] as? String) == "Kyle"
-      }
+			test.it("allows you to get a value via subscripting") {
+				try expect(context["name"] as? String) == "Kyle"
+			}
 
-      test.it("allows you to set a value via subscripting") {
-        context["name"] = "Katie"
+			test.it("allows you to set a value via subscripting") {
+				context["name"] = "Katie"
 
-        try expect(context["name"] as? String) == "Katie"
-      }
+				try expect(context["name"] as? String) == "Katie"
+			}
 
-      test.it("allows you to remove a value via subscripting") {
-        context["name"] = nil
+			test.it("allows you to remove a value via subscripting") {
+				context["name"] = nil
 
-        try expect(context["name"]).to.beNil()
-      }
+				try expect(context["name"]).to.beNil()
+			}
 
-      test.it("allows you to retrieve a value from a parent") {
-        try context.push {
-          try expect(context["name"] as? String) == "Kyle"
-        }
-      }
+			test.it("allows you to retrieve a value from a parent") {
+				try context.push {
+					try expect(context["name"] as? String) == "Kyle"
+				}
+			}
 
-      test.it("allows you to override a parent's value") {
-        try context.push {
-          context["name"] = "Katie"
-          try expect(context["name"] as? String) == "Katie"
-        }
-      }
-    }
-  }
+			test.it("allows you to override a parent's value") {
+				try context.push {
+					context["name"] = "Katie"
+					try expect(context["name"] as? String) == "Katie"
+				}
+			}
+		}
+	}
 
-  func testContextRestoration() {
-    describe("Context Restoration") { test in
-      var context = Context()
-      test.before {
-        context = Context(dictionary: ["name": "Kyle"])
-      }
+	func testContextRestoration() {
+		describe("Context Restoration") { test in
+			var context = Context()
+			test.before {
+				context = Context(dictionary: ["name": "Kyle"])
+			}
 
-      test.it("allows you to pop to restore previous state") {
-        context.push {
-          context["name"] = "Katie"
-        }
+			test.it("allows you to pop to restore previous state") {
+				context.push {
+					context["name"] = "Katie"
+				}
 
-        try expect(context["name"] as? String) == "Kyle"
-      }
+				try expect(context["name"] as? String) == "Kyle"
+			}
 
-      test.it("allows you to remove a parent's value in a level") {
-        try context.push {
-          context["name"] = nil
-          try expect(context["name"]).to.beNil()
-        }
+			test.it("allows you to remove a parent's value in a level") {
+				try context.push {
+					context["name"] = nil
+					try expect(context["name"]).to.beNil()
+				}
 
-        try expect(context["name"] as? String) == "Kyle"
-      }
+				try expect(context["name"] as? String) == "Kyle"
+			}
 
-      test.it("allows you to push a dictionary and run a closure then restoring previous state") {
-        var didRun = false
+			test.it("allows you to push a dictionary and run a closure then restoring previous state") {
+				var didRun = false
 
-        try context.push(dictionary: ["name": "Katie"]) {
-          didRun = true
-          try expect(context["name"] as? String) == "Katie"
-        }
+				try context.push(dictionary: ["name": "Katie"]) {
+					didRun = true
+					try expect(context["name"] as? String) == "Katie"
+				}
 
-        try expect(didRun).to.beTrue()
-        try expect(context["name"] as? String) == "Kyle"
-      }
+				try expect(didRun).to.beTrue()
+				try expect(context["name"] as? String) == "Kyle"
+			}
 
-      test.it("allows you to flatten the context contents") {
-        try context.push(dictionary: ["test": "abc"]) {
-          let flattened = context.flatten()
+			test.it("allows you to flatten the context contents") {
+				try context.push(dictionary: ["test": "abc"]) {
+					let flattened = context.flatten()
 
-          try expect(flattened.count) == 2
-          try expect(flattened["name"] as? String) == "Kyle"
-          try expect(flattened["test"] as? String) == "abc"
-        }
-      }
-    }
-  }
+					try expect(flattened.count) == 2
+					try expect(flattened["name"] as? String) == "Kyle"
+					try expect(flattened["test"] as? String) == "abc"
+				}
+			}
+		}
+	}
 
-  func testContextLazyEvaluation() {
-    let ticker = Ticker()
-    var context = Context()
-    var wrapper = LazyValueWrapper("")
+	func testContextLazyEvaluation() {
+		let ticker = Ticker()
+		var context = Context()
+		var wrapper = LazyValueWrapper("")
 
-    describe("Lazy evaluation") { test in
-      test.before {
-        ticker.count = 0
-        wrapper = LazyValueWrapper(ticker.tick())
-        context = Context(dictionary: ["name": wrapper])
-      }
+		describe("Lazy evaluation") { test in
+			test.before {
+				ticker.count = 0
+				wrapper = LazyValueWrapper(ticker.tick())
+				context = Context(dictionary: ["name": wrapper])
+			}
 
-      test.it("Evaluates lazy data") {
-        let template = Template(templateString: "{{ name }}")
-        let result = try template.render(context)
-        try expect(result) == "Kyle"
-        try expect(ticker.count) == 1
-      }
+			test.it("Evaluates lazy data") {
+				let template = Template(templateString: "{{ name }}")
+				let result = try template.render(context)
+				try expect(result) == "Kyle"
+				try expect(ticker.count) == 1
+			}
 
-      test.it("Evaluates lazy only once") {
-        let template = Template(templateString: "{{ name }}{{ name }}")
-        let result = try template.render(context)
-        try expect(result) == "KyleKyle"
-        try expect(ticker.count) == 1
-      }
+			test.it("Evaluates lazy only once") {
+				let template = Template(templateString: "{{ name }}{{ name }}")
+				let result = try template.render(context)
+				try expect(result) == "KyleKyle"
+				try expect(ticker.count) == 1
+			}
 
-      test.it("Does not evaluate lazy data when not used") {
-        let template = Template(templateString: "{{ 'Katie' }}")
-        let result = try template.render(context)
-        try expect(result) == "Katie"
-        try expect(ticker.count) == 0
-      }
-    }
-  }
+			test.it("Does not evaluate lazy data when not used") {
+				let template = Template(templateString: "{{ 'Katie' }}")
+				let result = try template.render(context)
+				try expect(result) == "Katie"
+				try expect(ticker.count) == 0
+			}
+		}
+	}
 
-  func testContextLazyAccessTypes() {
-    it("Supports evaluation via context reference") {
-      let context = Context(dictionary: ["name": "Kyle"])
-      context["alias"] = LazyValueWrapper { $0["name"] ?? "" }
-      let template = Template(templateString: "{{ alias }}")
+	func testContextLazyAccessTypes() {
+		it("Supports evaluation via context reference") {
+			let context = Context(dictionary: ["name": "Kyle"])
+			context["alias"] = LazyValueWrapper { $0["name"] ?? "" }
+			let template = Template(templateString: "{{ alias }}")
 
-      try context.push(dictionary: ["name": "Katie"]) {
-        let result = try template.render(context)
-        try expect(result) == "Katie"
-      }
-    }
+			try context.push(dictionary: ["name": "Katie"]) {
+				let result = try template.render(context)
+				try expect(result) == "Katie"
+			}
+		}
 
-    it("Supports evaluation via context copy") {
-      let context = Context(dictionary: ["name": "Kyle"])
-      context["alias"] = LazyValueWrapper(copying: context) { $0["name"] ?? "" }
-      let template = Template(templateString: "{{ alias }}")
+		it("Supports evaluation via context copy") {
+			let context = Context(dictionary: ["name": "Kyle"])
+			context["alias"] = LazyValueWrapper(copying: context) { $0["name"] ?? "" }
+			let template = Template(templateString: "{{ alias }}")
 
-      try context.push(dictionary: ["name": "Katie"]) {
-        let result = try template.render(context)
-        try expect(result) == "Kyle"
-      }
-    }
-  }
+			try context.push(dictionary: ["name": "Katie"]) {
+				let result = try template.render(context)
+				try expect(result) == "Kyle"
+			}
+		}
+	}
 }
 
 // MARK: - Helpers
 
 private final class Ticker {
-  var count: Int = 0
-  func tick() -> String {
-    count += 1
-    return "Kyle"
-  }
+	var count: Int = 0
+	func tick() -> String {
+		count += 1
+		return "Kyle"
+	}
 }

Tests/StencilTests/EnvironmentBaseAndChildTemplateSpec.swift

@@ -1,131 +1,125 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class EnvironmentBaseAndChildTemplateTests: XCTestCase {
-  private var environment = Environment(loader: ExampleLoader())
-  private var childTemplate: Template = ""
-  private var baseTemplate: Template = ""
+	private var environment = Environment(loader: ExampleLoader())
+	private var childTemplate: Template = ""
+	private var baseTemplate: Template = ""
 
-  override func setUp() {
-    super.setUp()
+	override func setUp() {
+		super.setUp()
 
-    let path = Path(#file as String) + ".." + "fixtures"
-    let loader = FileSystemLoader(paths: [path])
-    environment = Environment(loader: loader)
-    childTemplate = ""
-    baseTemplate = ""
-  }
+		let path = Path(#file as String)! / ".." / "fixtures"
+		let loader = FileSystemLoader(paths: [path])
+		environment = Environment(loader: loader)
+		childTemplate = ""
+		baseTemplate = ""
+	}
 
-  override func tearDown() {
-    super.tearDown()
-  }
+	override func tearDown() {
+		super.tearDown()
+	}
 
-  func testSyntaxErrorInBaseTemplate() throws {
-    childTemplate = try environment.loadTemplate(name: "invalid-child-super.html")
-    baseTemplate = try environment.loadTemplate(name: "invalid-base.html")
+	func testSyntaxErrorInBaseTemplate() throws {
+		childTemplate = try environment.loadTemplate(name: "invalid-child-super.html")
+		baseTemplate = try environment.loadTemplate(name: "invalid-base.html")
 
-    try expectError(
-      reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-      childToken: "extends \"invalid-base.html\"",
-      baseToken: "target|unknown"
-    )
-  }
+		try expectError(
+			reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+			childToken: "extends \"invalid-base.html\"",
+			baseToken: "target|unknown"
+		)
+	}
 
-  func testRuntimeErrorInBaseTemplate() throws {
-    let filterExtension = Extension()
-    filterExtension.registerFilter("unknown") {  (_: Any?) in
-      throw TemplateSyntaxError("filter error")
-    }
-    environment.extensions += [filterExtension]
+	func testRuntimeErrorInBaseTemplate() throws {
+		let filterExtension = Extension()
+		filterExtension.registerFilter("unknown") {	 (_: Any?) in
+			throw TemplateSyntaxError("filter error")
+		}
+		environment.extensions += [filterExtension]
 
-    childTemplate = try environment.loadTemplate(name: "invalid-child-super.html")
-    baseTemplate = try environment.loadTemplate(name: "invalid-base.html")
+		childTemplate = try environment.loadTemplate(name: "invalid-child-super.html")
+		baseTemplate = try environment.loadTemplate(name: "invalid-base.html")
 
-    try expectError(
-      reason: "filter error",
-      childToken: "extends \"invalid-base.html\"",
-      baseToken: "target|unknown"
-    )
-  }
+		try expectError(
+			reason: "filter error",
+			childToken: "extends \"invalid-base.html\"",
+			baseToken: "target|unknown"
+		)
+	}
 
-  func testSyntaxErrorInChildTemplate() throws {
-    childTemplate = Template(
-      templateString: """
-      {% extends "base.html" %}
-      {% block body %}Child {{ target|unknown }}{% endblock %}
-      """,
-      environment: environment,
-      name: nil
-    )
+	func testSyntaxErrorInChildTemplate() throws {
+		childTemplate = Template(
+			templateString: """
+			{% extends "base.html" %}
+			{% block body %}Child {{ target|unknown }}{% endblock %}
+			""",
+			environment: environment,
+			name: nil
+		)
 
-    try expectError(
-      reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-      childToken: "target|unknown",
-      baseToken: nil
-    )
-  }
+		try expectError(
+			reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+			childToken: "target|unknown",
+			baseToken: nil
+		)
+	}
 
-  func testRuntimeErrorInChildTemplate() throws {
-    let filterExtension = Extension()
-    filterExtension.registerFilter("unknown") {  (_: Any?) in
-      throw TemplateSyntaxError("filter error")
-    }
-    environment.extensions += [filterExtension]
+	func testRuntimeErrorInChildTemplate() throws {
+		let filterExtension = Extension()
+		filterExtension.registerFilter("unknown") {	 (_: Any?) in
+			throw TemplateSyntaxError("filter error")
+		}
+		environment.extensions += [filterExtension]
 
-    childTemplate = Template(
-      templateString: """
-      {% extends "base.html" %}
-      {% block body %}Child {{ target|unknown }}{% endblock %}
-      """,
-      environment: environment,
-      name: nil
-    )
+		childTemplate = Template(
+			templateString: """
+			{% extends "base.html" %}
+			{% block body %}Child {{ target|unknown }}{% endblock %}
+			""",
+			environment: environment,
+			name: nil
+		)
 
-    try expectError(
-      reason: "filter error",
-      childToken: "target|unknown",
-      baseToken: nil
-    )
-  }
+		try expectError(
+			reason: "filter error",
+			childToken: "target|unknown",
+			baseToken: nil
+		)
+	}
 
-  private func expectError(
-    reason: String,
-    childToken: String,
-    baseToken: String?,
-    file: String = #file,
-    line: Int = #line,
-    function: String = #function
-  ) throws {
-    var expectedError = expectedSyntaxError(token: childToken, template: childTemplate, description: reason)
-    if let baseToken = baseToken {
-      expectedError.stackTrace = [
-        expectedSyntaxError(
-          token: baseToken,
-          template: baseTemplate,
-          description: reason
-        ).token
-      ].compactMap { $0 }
-    }
-    let error = try expect(
-      self.environment.render(template: self.childTemplate, context: ["target": "World"]),
-      file: file,
-      line: line,
-      function: function
-    ).toThrow() as TemplateSyntaxError
-    let reporter = SimpleErrorReporter()
-    try expect(
-      reporter.renderError(error),
-      file: file,
-      line: line,
-      function: function
-    ) == reporter.renderError(expectedError)
-  }
+	private func expectError(
+		reason: String,
+		childToken: String,
+		baseToken: String?,
+		file: String = #file,
+		line: Int = #line,
+		function: String = #function
+	) throws {
+		var expectedError = expectedSyntaxError(token: childToken, template: childTemplate, description: reason)
+		if let baseToken = baseToken {
+			expectedError.stackTrace = [
+				expectedSyntaxError(
+					token: baseToken,
+					template: baseTemplate,
+					description: reason
+				).token
+			].compactMap { $0 }
+		}
+		let error = try expect(
+			self.environment.render(template: self.childTemplate, context: ["target": "World"]),
+			file: file,
+			line: line,
+			function: function
+		).toThrow() as TemplateSyntaxError
+		let reporter = SimpleErrorReporter()
+		try expect(
+			reporter.renderError(error),
+			file: file,
+			line: line,
+			function: function
+		) == reporter.renderError(expectedError)
+	}
 }

Tests/StencilTests/EnvironmentIncludeTemplateSpec.swift

@@ -1,94 +1,88 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class EnvironmentIncludeTemplateTests: XCTestCase {
-  private var environment = Environment(loader: ExampleLoader())
-  private var template: Template = ""
-  private var includedTemplate: Template = ""
+	private var environment = Environment(loader: ExampleLoader())
+	private var template: Template = ""
+	private var includedTemplate: Template = ""
 
-  override func setUp() {
-    super.setUp()
+	override func setUp() {
+		super.setUp()
 
-    let path = Path(#file as String) + ".." + "fixtures"
-    let loader = FileSystemLoader(paths: [path])
-    environment = Environment(loader: loader)
-    template = ""
-    includedTemplate = ""
-  }
+		let path = Path(#file as String)! / ".." / "fixtures"
+		let loader = FileSystemLoader(paths: [path])
+		environment = Environment(loader: loader)
+		template = ""
+		includedTemplate = ""
+	}
 
-  override func tearDown() {
-    super.tearDown()
-  }
+	override func tearDown() {
+		super.tearDown()
+	}
 
-  func testSyntaxError() throws {
-    template = Template(templateString: """
-      {% include "invalid-include.html" %}
-      """, environment: environment)
-    includedTemplate = try environment.loadTemplate(name: "invalid-include.html")
+	func testSyntaxError() throws {
+		template = Template(templateString: """
+			{% include "invalid-include.html" %}
+			""", environment: environment)
+		includedTemplate = try environment.loadTemplate(name: "invalid-include.html")
 
-    try expectError(
-      reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-      token: #"include "invalid-include.html""#,
-      includedToken: "target|unknown"
-    )
-  }
+		try expectError(
+			reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+			token: #"include "invalid-include.html""#,
+			includedToken: "target|unknown"
+		)
+	}
 
-  func testRuntimeError() throws {
-    let filterExtension = Extension()
-    filterExtension.registerFilter("unknown") {  (_: Any?) in
-      throw TemplateSyntaxError("filter error")
-    }
-    environment.extensions += [filterExtension]
+	func testRuntimeError() throws {
+		let filterExtension = Extension()
+		filterExtension.registerFilter("unknown") {	 (_: Any?) in
+			throw TemplateSyntaxError("filter error")
+		}
+		environment.extensions += [filterExtension]
 
-    template = Template(templateString: """
-      {% include "invalid-include.html" %}
-      """, environment: environment)
-    includedTemplate = try environment.loadTemplate(name: "invalid-include.html")
+		template = Template(templateString: """
+			{% include "invalid-include.html" %}
+			""", environment: environment)
+		includedTemplate = try environment.loadTemplate(name: "invalid-include.html")
 
-    try expectError(
-      reason: "filter error",
-      token: "include \"invalid-include.html\"",
-      includedToken: "target|unknown"
-    )
-  }
+		try expectError(
+			reason: "filter error",
+			token: "include \"invalid-include.html\"",
+			includedToken: "target|unknown"
+		)
+	}
 
-  private func expectError(
-    reason: String,
-    token: String,
-    includedToken: String,
-    file: String = #file,
-    line: Int = #line,
-    function: String = #function
-  ) throws {
-    var expectedError = expectedSyntaxError(token: token, template: template, description: reason)
-    expectedError.stackTrace = [
-      expectedSyntaxError(
-        token: includedToken,
-        template: includedTemplate,
-        description: reason
-      ).token
-    ].compactMap { $0 }
+	private func expectError(
+		reason: String,
+		token: String,
+		includedToken: String,
+		file: String = #file,
+		line: Int = #line,
+		function: String = #function
+	) throws {
+		var expectedError = expectedSyntaxError(token: token, template: template, description: reason)
+		expectedError.stackTrace = [
+			expectedSyntaxError(
+				token: includedToken,
+				template: includedTemplate,
+				description: reason
+			).token
+		].compactMap { $0 }
 
-    let error = try expect(
-      self.environment.render(template: self.template, context: ["target": "World"]),
-      file: file,
-      line: line,
-      function: function
-    ).toThrow() as TemplateSyntaxError
-    let reporter = SimpleErrorReporter()
-    try expect(
-      reporter.renderError(error),
-      file: file,
-      line: line,
-      function: function
-    ) == reporter.renderError(expectedError)
-  }
+		let error = try expect(
+			self.environment.render(template: self.template, context: ["target": "World"]),
+			file: file,
+			line: line,
+			function: function
+		).toThrow() as TemplateSyntaxError
+		let reporter = SimpleErrorReporter()
+		try expect(
+			reporter.renderError(error),
+			file: file,
+			line: line,
+			function: function
+		) == reporter.renderError(expectedError)
+	}
 }

Tests/StencilTests/EnvironmentSpec.swift

@@ -1,227 +1,220 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
-import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class EnvironmentTests: XCTestCase {
-  private var environment = Environment(loader: ExampleLoader())
-  private var template: Template = ""
+	private var environment = Environment(loader: ExampleLoader())
+	private var template: Template = ""
 
-  override func setUp() {
-    super.setUp()
+	override func setUp() {
+		super.setUp()
 
-    let errorExtension = Extension()
-    errorExtension.registerFilter("throw") { (_: Any?) in
-      throw TemplateSyntaxError("filter error")
-    }
-    errorExtension.registerSimpleTag("simpletag") { _ in
-      throw TemplateSyntaxError("simpletag error")
-    }
-    errorExtension.registerTag("customtag") { _, token in
-      ErrorNode(token: token)
-    }
+		let errorExtension = Extension()
+		errorExtension.registerFilter("throw") { (_: Any?) in
+			throw TemplateSyntaxError("filter error")
+		}
+		errorExtension.registerSimpleTag("simpletag") { _ in
+			throw TemplateSyntaxError("simpletag error")
+		}
+		errorExtension.registerTag("customtag") { _, token in
+			ErrorNode(token: token)
+		}
 
-    environment = Environment(loader: ExampleLoader())
-    environment.extensions += [errorExtension]
-    template = ""
-  }
+		environment = Environment(loader: ExampleLoader())
+		environment.extensions += [errorExtension]
+		template = ""
+	}
 
-  override func tearDown() {
-    super.tearDown()
-  }
+	override func tearDown() {
+		super.tearDown()
+	}
 
-  func testLoading() {
-    it("can load a template from a name") {
-      let template = try self.environment.loadTemplate(name: "example.html")
-      try expect(template.name) == "example.html"
-    }
+	func testLoading() {
+		it("can load a template from a name") {
+			let template = try self.environment.loadTemplate(name: "example.html")
+			try expect(template.name) == "example.html"
+		}
 
-    it("can load a template from a names") {
-      let template = try self.environment.loadTemplate(names: ["first.html", "example.html"])
-      try expect(template.name) == "example.html"
-    }
-  }
+		it("can load a template from a names") {
+			let template = try self.environment.loadTemplate(names: ["first.html", "example.html"])
+			try expect(template.name) == "example.html"
+		}
+	}
 
-  func testRendering() {
-    it("can render a template from a string") {
-      let result = try self.environment.renderTemplate(string: "Hello World")
-      try expect(result) == "Hello World"
-    }
+	func testRendering() {
+		it("can render a template from a string") {
+			let result = try self.environment.renderTemplate(string: "Hello World")
+			try expect(result) == "Hello World"
+		}
 
-    it("can render a template from a file") {
-      let result = try self.environment.renderTemplate(name: "example.html")
-      try expect(result) == "Hello World!"
-    }
+		it("can render a template from a file") {
+			let result = try self.environment.renderTemplate(name: "example.html")
+			try expect(result) == "Hello World!"
+		}
 
-    it("allows you to provide a custom template class") {
-      let environment = Environment(loader: ExampleLoader(), templateClass: CustomTemplate.self)
-      let result = try environment.renderTemplate(string: "Hello World")
+		it("allows you to provide a custom template class") {
+			let environment = Environment(loader: ExampleLoader(), templateClass: CustomTemplate.self)
+			let result = try environment.renderTemplate(string: "Hello World")
 
-      try expect(result) == "here"
-    }
-  }
+			try expect(result) == "here"
+		}
+	}
 
-  func testSyntaxError() {
-    it("reports syntax error on invalid for tag syntax") {
-      self.template = "Hello {% for name in %}{{ name }}, {% endfor %}!"
-      try self.expectError(
-        reason: "'for' statements should use the syntax: `for <x> in <y> [where <condition>]`.",
-        token: "for name in"
-      )
-    }
+	func testSyntaxError() {
+		it("reports syntax error on invalid for tag syntax") {
+			self.template = "Hello {% for name in %}{{ name }}, {% endfor %}!"
+			try self.expectError(
+				reason: "'for' statements should use the syntax: `for <x> in <y> [where <condition>]`.",
+				token: "for name in"
+			)
+		}
 
-    it("reports syntax error on missing endfor") {
-      self.template = "{% for name in names %}{{ name }}"
-      try self.expectError(reason: "`endfor` was not found.", token: "for name in names")
-    }
+		it("reports syntax error on missing endfor") {
+			self.template = "{% for name in names %}{{ name }}"
+			try self.expectError(reason: "`endfor` was not found.", token: "for name in names")
+		}
 
-    it("reports syntax error on unknown tag") {
-      self.template = "{% for name in names %}{{ name }}{% end %}"
-      try self.expectError(reason: "Unknown template tag 'end'", token: "end")
-    }
-  }
+		it("reports syntax error on unknown tag") {
+			self.template = "{% for name in names %}{{ name }}{% end %}"
+			try self.expectError(reason: "Unknown template tag 'end'", token: "end")
+		}
+	}
 
-  func testUnknownFilter() {
-    it("reports syntax error in for tag") {
-      self.template = "{% for name in names|unknown %}{{ name }}{% endfor %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "names|unknown"
-      )
-    }
+	func testUnknownFilter() {
+		it("reports syntax error in for tag") {
+			self.template = "{% for name in names|unknown %}{{ name }}{% endfor %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "names|unknown"
+			)
+		}
 
-    it("reports syntax error in for-where tag") {
-      self.template = "{% for name in names where name|unknown %}{{ name }}{% endfor %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "name|unknown"
-      )
-    }
+		it("reports syntax error in for-where tag") {
+			self.template = "{% for name in names where name|unknown %}{{ name }}{% endfor %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "name|unknown"
+			)
+		}
 
-    it("reports syntax error in if tag") {
-      self.template = "{% if name|unknown %}{{ name }}{% endif %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "name|unknown"
-      )
-    }
+		it("reports syntax error in if tag") {
+			self.template = "{% if name|unknown %}{{ name }}{% endif %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "name|unknown"
+			)
+		}
 
-    it("reports syntax error in elif tag") {
-      self.template = "{% if name %}{{ name }}{% elif name|unknown %}{% endif %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "name|unknown"
-      )
-    }
+		it("reports syntax error in elif tag") {
+			self.template = "{% if name %}{{ name }}{% elif name|unknown %}{% endif %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "name|unknown"
+			)
+		}
 
-    it("reports syntax error in ifnot tag") {
-      self.template = "{% ifnot name|unknown %}{{ name }}{% endif %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "name|unknown"
-      )
-    }
+		it("reports syntax error in ifnot tag") {
+			self.template = "{% ifnot name|unknown %}{{ name }}{% endif %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "name|unknown"
+			)
+		}
 
-    it("reports syntax error in filter tag") {
-      self.template = "{% filter unknown %}Text{% endfilter %}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "filter unknown"
-      )
-    }
+		it("reports syntax error in filter tag") {
+			self.template = "{% filter unknown %}Text{% endfilter %}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "filter unknown"
+			)
+		}
 
-    it("reports syntax error in variable tag") {
-      self.template = "{{ name|unknown }}"
-      try self.expectError(
-        reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
-        token: "name|unknown"
-      )
-    }
+		it("reports syntax error in variable tag") {
+			self.template = "{{ name|unknown }}"
+			try self.expectError(
+				reason: "Unknown filter 'unknown'. Found similar filters: 'uppercase'.",
+				token: "name|unknown"
+			)
+		}
 
-    it("reports error in variable tag") {
-      self.template = "{{ }}"
-      try self.expectError(reason: "Missing variable name", token: " ")
-    }
-  }
+		it("reports error in variable tag") {
+			self.template = "{{ }}"
+			try self.expectError(reason: "Missing variable name", token: " ")
+		}
+	}
 
-  func testRenderingError() {
-    it("reports rendering error in variable filter") {
-      self.template = Template(templateString: "{{ name|throw }}", environment: self.environment)
-      try self.expectError(reason: "filter error", token: "name|throw")
-    }
+	func testRenderingError() {
+		it("reports rendering error in variable filter") {
+			self.template = Template(templateString: "{{ name|throw }}", environment: self.environment)
+			try self.expectError(reason: "filter error", token: "name|throw")
+		}
 
-    it("reports rendering error in filter tag") {
-      self.template = Template(templateString: "{% filter throw %}Test{% endfilter %}", environment: self.environment)
-      try self.expectError(reason: "filter error", token: "filter throw")
-    }
+		it("reports rendering error in filter tag") {
+			self.template = Template(templateString: "{% filter throw %}Test{% endfilter %}", environment: self.environment)
+			try self.expectError(reason: "filter error", token: "filter throw")
+		}
 
-    it("reports rendering error in simple tag") {
-      self.template = Template(templateString: "{% simpletag %}", environment: self.environment)
-      try self.expectError(reason: "simpletag error", token: "simpletag")
-    }
+		it("reports rendering error in simple tag") {
+			self.template = Template(templateString: "{% simpletag %}", environment: self.environment)
+			try self.expectError(reason: "simpletag error", token: "simpletag")
+		}
 
-    it("reports passing argument to simple filter") {
-      self.template = "{{ name|uppercase:5 }}"
-      try self.expectError(reason: "Can't invoke filter with an argument", token: "name|uppercase:5")
-    }
+		it("reports passing argument to simple filter") {
+			self.template = "{{ name|uppercase:5 }}"
+			try self.expectError(reason: "Can't invoke filter with an argument", token: "name|uppercase:5")
+		}
 
-    it("reports rendering error in custom tag") {
-      self.template = Template(templateString: "{% customtag %}", environment: self.environment)
-      try self.expectError(reason: "Custom Error", token: "customtag")
-    }
+		it("reports rendering error in custom tag") {
+			self.template = Template(templateString: "{% customtag %}", environment: self.environment)
+			try self.expectError(reason: "Custom Error", token: "customtag")
+		}
 
-    it("reports rendering error in for body") {
-      self.template = Template(templateString: """
-        {% for name in names %}{% customtag %}{% endfor %}
-        """, environment: self.environment)
-      try self.expectError(reason: "Custom Error", token: "customtag")
-    }
+		it("reports rendering error in for body") {
+			self.template = Template(templateString: """
+				{% for name in names %}{% customtag %}{% endfor %}
+				""", environment: self.environment)
+			try self.expectError(reason: "Custom Error", token: "customtag")
+		}
 
-    it("reports rendering error in block") {
-      self.template = Template(
-        templateString: "{% block some %}{% customtag %}{% endblock %}",
-        environment: self.environment
-      )
-      try self.expectError(reason: "Custom Error", token: "customtag")
-    }
-  }
+		it("reports rendering error in block") {
+			self.template = Template(
+				templateString: "{% block some %}{% customtag %}{% endblock %}",
+				environment: self.environment
+			)
+			try self.expectError(reason: "Custom Error", token: "customtag")
+		}
+	}
 
-  private func expectError(
-    reason: String,
-    token: String,
-    file: String = #file,
-    line: Int = #line,
-    function: String = #function
-  ) throws {
-    let expectedError = expectedSyntaxError(token: token, template: template, description: reason)
+	private func expectError(
+		reason: String,
+		token: String,
+		file: String = #file,
+		line: Int = #line,
+		function: String = #function
+	) throws {
+		let expectedError = expectedSyntaxError(token: token, template: template, description: reason)
 
-    let error = try expect(
-      self.environment.render(template: self.template, context: ["names": ["Bob", "Alice"], "name": "Bob"]),
-      file: file,
-      line: line,
-      function: function
-    ).toThrow() as TemplateSyntaxError
-    let reporter = SimpleErrorReporter()
-    try expect(
-      reporter.renderError(error),
-      file: file,
-      line: line,
-      function: function
-    ) == reporter.renderError(expectedError)
-  }
+		let error = try expect(
+			self.environment.render(template: self.template, context: ["names": ["Bob", "Alice"], "name": "Bob"]),
+			file: file,
+			line: line,
+			function: function
+		).toThrow() as TemplateSyntaxError
+		let reporter = SimpleErrorReporter()
+		try expect(
+			reporter.renderError(error),
+			file: file,
+			line: line,
+			function: function
+		) == reporter.renderError(expectedError)
+	}
 }
 
 // MARK: - Helpers
 
 private class CustomTemplate: Template {
-  // swiftlint:disable discouraged_optional_collection
-  override func render(_ dictionary: [String: Any]? = nil) throws -> String {
-    "here"
-  }
+	// swiftlint:disable discouraged_optional_collection
+	override func render(_ dictionary: [String: Any]? = nil) throws -> String {
+		"here"
+	}
 }

Tests/StencilTests/ExpressionSpec.swift

@@ -1,361 +1,355 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class ExpressionsTests: XCTestCase {
-  private let parser = TokenParser(tokens: [], environment: Environment())
-
-  private func makeExpression(_ components: [String]) -> Expression {
-    do {
-      let parser = try IfExpressionParser.parser(
-        components: components,
-        environment: Environment(),
-        token: .text(value: "", at: .unknown)
-      )
-      return try parser.parse()
-    } catch {
-      fatalError(error.localizedDescription)
-    }
-  }
-
-  func testTrueExpressions() {
-    let expression = VariableExpression(variable: Variable("value"))
-
-    it("evaluates to true when value is not nil") {
-      let context = Context(dictionary: ["value": "known"])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-
-    it("evaluates to true when array variable is not empty") {
-      let items: [[String: Any]] = [["key": "key1", "value": 42], ["key": "key2", "value": 1_337]]
-      let context = Context(dictionary: ["value": [items]])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-
-    it("evaluates to false when dictionary value is empty") {
-      let emptyItems = [String: Any]()
-      let context = Context(dictionary: ["value": emptyItems])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to true when integer value is above 0") {
-      let context = Context(dictionary: ["value": 1])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-
-    it("evaluates to true with string") {
-      let context = Context(dictionary: ["value": "test"])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-
-    it("evaluates to true when float value is above 0") {
-      let context = Context(dictionary: ["value": Float(0.5)])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-
-    it("evaluates to true when double value is above 0") {
-      let context = Context(dictionary: ["value": Double(0.5)])
-      try expect(try expression.evaluate(context: context)).to.beTrue()
-    }
-  }
-
-  func testFalseExpressions() {
-    let expression = VariableExpression(variable: Variable("value"))
-
-    it("evaluates to false when value is unset") {
-      let context = Context()
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when array value is empty") {
-      let emptyItems = [[String: Any]]()
-      let context = Context(dictionary: ["value": emptyItems])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when dictionary value is empty") {
-      let emptyItems = [String: Any]()
-      let context = Context(dictionary: ["value": emptyItems])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when Array<Any> value is empty") {
-      let context = Context(dictionary: ["value": ([] as [Any])])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when empty string") {
-      let context = Context(dictionary: ["value": ""])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when integer value is below 0 or below") {
-      let context = Context(dictionary: ["value": 0])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-
-      let negativeContext = Context(dictionary: ["value": -1])
-      try expect(try expression.evaluate(context: negativeContext)).to.beFalse()
-    }
-
-    it("evaluates to false when float is 0 or below") {
-      let context = Context(dictionary: ["value": Float(0)])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when double is 0 or below") {
-      let context = Context(dictionary: ["value": Double(0)])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-
-    it("evaluates to false when uint is 0") {
-      let context = Context(dictionary: ["value": UInt(0)])
-      try expect(try expression.evaluate(context: context)).to.beFalse()
-    }
-  }
-
-  func testNotExpression() {
-    it("returns truthy for positive expressions") {
-      let expression = NotExpression(expression: VariableExpression(variable: Variable("true")))
-      try expect(expression.evaluate(context: Context())).to.beFalse()
-    }
-
-    it("returns falsy for negative expressions") {
-      let expression = NotExpression(expression: VariableExpression(variable: Variable("false")))
-      try expect(expression.evaluate(context: Context())).to.beTrue()
-    }
-  }
-
-  func testExpressionParsing() {
-    it("can parse a variable expression") {
-      let expression = self.makeExpression(["value"])
-      try expect(expression.evaluate(context: Context())).to.beFalse()
-      try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beTrue()
-    }
-
-    it("can parse a not expression") {
-      let expression = self.makeExpression(["not", "value"])
-      try expect(expression.evaluate(context: Context())).to.beTrue()
-      try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beFalse()
-    }
-  }
-
-  func testAndExpression() {
-    let expression = makeExpression(["lhs", "and", "rhs"])
-
-    it("evaluates to false with lhs false") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beFalse()
-    }
-
-    it("evaluates to false with rhs false") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
-    }
-
-    it("evaluates to false with lhs and rhs false") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
-    }
-
-    it("evaluates to true with lhs and rhs true") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
-    }
-  }
-
-  func testOrExpression() {
-    let expression = makeExpression(["lhs", "or", "rhs"])
-
-    it("evaluates to true with lhs true") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beTrue()
-    }
-
-    it("evaluates to true with rhs true") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beTrue()
-    }
-
-    it("evaluates to true with lhs and rhs true") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
-    }
-
-    it("evaluates to false with lhs and rhs false") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
-    }
-  }
-
-  func testEqualityExpression() {
-    let expression = makeExpression(["lhs", "==", "rhs"])
-
-    it("evaluates to true with equal lhs/rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "a"]))).to.beTrue()
-    }
-
-    it("evaluates to false with non equal lhs/rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beFalse()
-    }
-
-    it("evaluates to true with nils") {
-      try expect(expression.evaluate(context: Context(dictionary: [:]))).to.beTrue()
-    }
-
-    it("evaluates to true with numbers") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.0]))).to.beTrue()
-    }
-
-    it("evaluates to false with non equal numbers") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.1]))).to.beFalse()
-    }
-
-    it("evaluates to true with booleans") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
-    }
-
-    it("evaluates to false with falsy booleans") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
-    }
-
-    it("evaluates to false with different types") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": 1]))).to.beFalse()
-    }
-  }
-
-  func testInequalityExpression() {
-    let expression = makeExpression(["lhs", "!=", "rhs"])
-
-    it("evaluates to true with inequal lhs/rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beTrue()
-    }
-
-    it("evaluates to false with equal lhs/rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": "b", "rhs": "b"]))).to.beFalse()
-    }
-  }
-
-  func testMoreThanExpression() {
-    let expression = makeExpression(["lhs", ">", "rhs"])
-
-    it("evaluates to true with lhs > rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 4]))).to.beTrue()
-    }
-
-    it("evaluates to false with lhs == rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
-    }
-  }
-
-  func testMoreThanEqualExpression() {
-    let expression = makeExpression(["lhs", ">=", "rhs"])
-
-    it("evaluates to true with lhs == rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
-    }
-
-    it("evaluates to false with lhs < rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.1]))).to.beFalse()
-    }
-  }
-
-  func testLessThanExpression() {
-    let expression = makeExpression(["lhs", "<", "rhs"])
-
-    it("evaluates to true with lhs < rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 4, "rhs": 4.5]))).to.beTrue()
-    }
-
-    it("evaluates to false with lhs == rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
-    }
-  }
-
-  func testLessThanEqualExpression() {
-    let expression = makeExpression(["lhs", "<=", "rhs"])
-
-    it("evaluates to true with lhs == rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
-    }
-
-    it("evaluates to false with lhs > rhs") {
-      try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.1, "rhs": 5.0]))).to.beFalse()
-    }
-  }
-
-  func testMultipleExpressions() {
-    let expression = makeExpression(["one", "or", "two", "and", "not", "three"])
-
-    it("evaluates to true with one") {
-      try expect(expression.evaluate(context: Context(dictionary: ["one": true]))).to.beTrue()
-    }
-
-    it("evaluates to true with one and three") {
-      try expect(expression.evaluate(context: Context(dictionary: ["one": true, "three": true]))).to.beTrue()
-    }
-
-    it("evaluates to true with two") {
-      try expect(expression.evaluate(context: Context(dictionary: ["two": true]))).to.beTrue()
-    }
-
-    it("evaluates to false with two and three") {
-      try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
-    }
-
-    it("evaluates to false with two and three") {
-      try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
-    }
-
-    it("evaluates to false with nothing") {
-      try expect(expression.evaluate(context: Context())).to.beFalse()
-    }
-  }
-
-  func testTrueInExpression() throws {
-    let expression = makeExpression(["lhs", "in", "rhs"])
-
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 1,
-      "rhs": [1, 2, 3]
-    ]))).to.beTrue()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": "a",
-      "rhs": ["a", "b", "c"]
-    ]))).to.beTrue()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": "a",
-      "rhs": "abc"
-    ]))).to.beTrue()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 1,
-      "rhs": 1...3
-    ]))).to.beTrue()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 1,
-      "rhs": 1..<3
-    ]))).to.beTrue()
-  }
-
-  func testFalseInExpression() throws {
-    let expression = makeExpression(["lhs", "in", "rhs"])
-
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 1,
-      "rhs": [2, 3, 4]
-    ]))).to.beFalse()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": "a",
-      "rhs": ["b", "c", "d"]
-    ]))).to.beFalse()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": "a",
-      "rhs": "bcd"
-    ]))).to.beFalse()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 4,
-      "rhs": 1...3
-    ]))).to.beFalse()
-    try expect(expression.evaluate(context: Context(dictionary: [
-      "lhs": 3,
-      "rhs": 1..<3
-    ]))).to.beFalse()
-  }
+	private let parser = TokenParser(tokens: [], environment: Environment())
+
+	private func makeExpression(_ components: [String]) -> Stencil.Expression {
+		do {
+			let parser = try IfExpressionParser.parser(
+				components: components,
+				environment: Environment(),
+				token: .text(value: "", at: .unknown)
+			)
+			return try parser.parse()
+		} catch {
+			fatalError(error.localizedDescription)
+		}
+	}
+
+	func testTrueExpressions() {
+		let expression = VariableExpression(variable: Variable("value"))
+
+		it("evaluates to true when value is not nil") {
+			let context = Context(dictionary: ["value": "known"])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+
+		it("evaluates to true when array variable is not empty") {
+			let items: [[String: Any]] = [["key": "key1", "value": 42], ["key": "key2", "value": 1_337]]
+			let context = Context(dictionary: ["value": [items]])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+
+		it("evaluates to false when dictionary value is empty") {
+			let emptyItems = [String: Any]()
+			let context = Context(dictionary: ["value": emptyItems])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to true when integer value is above 0") {
+			let context = Context(dictionary: ["value": 1])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+
+		it("evaluates to true with string") {
+			let context = Context(dictionary: ["value": "test"])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+
+		it("evaluates to true when float value is above 0") {
+			let context = Context(dictionary: ["value": Float(0.5)])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+
+		it("evaluates to true when double value is above 0") {
+			let context = Context(dictionary: ["value": Double(0.5)])
+			try expect(try expression.evaluate(context: context)).to.beTrue()
+		}
+	}
+
+	func testFalseExpressions() {
+		let expression = VariableExpression(variable: Variable("value"))
+
+		it("evaluates to false when value is unset") {
+			let context = Context()
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when array value is empty") {
+			let emptyItems = [[String: Any]]()
+			let context = Context(dictionary: ["value": emptyItems])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when dictionary value is empty") {
+			let emptyItems = [String: Any]()
+			let context = Context(dictionary: ["value": emptyItems])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when Array<Any> value is empty") {
+			let context = Context(dictionary: ["value": ([] as [Any])])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when empty string") {
+			let context = Context(dictionary: ["value": ""])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when integer value is below 0 or below") {
+			let context = Context(dictionary: ["value": 0])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+
+			let negativeContext = Context(dictionary: ["value": -1])
+			try expect(try expression.evaluate(context: negativeContext)).to.beFalse()
+		}
+
+		it("evaluates to false when float is 0 or below") {
+			let context = Context(dictionary: ["value": Float(0)])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when double is 0 or below") {
+			let context = Context(dictionary: ["value": Double(0)])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+
+		it("evaluates to false when uint is 0") {
+			let context = Context(dictionary: ["value": UInt(0)])
+			try expect(try expression.evaluate(context: context)).to.beFalse()
+		}
+	}
+
+	func testNotExpression() {
+		it("returns truthy for positive expressions") {
+			let expression = NotExpression(expression: VariableExpression(variable: Variable("true")))
+			try expect(expression.evaluate(context: Context())).to.beFalse()
+		}
+
+		it("returns falsy for negative expressions") {
+			let expression = NotExpression(expression: VariableExpression(variable: Variable("false")))
+			try expect(expression.evaluate(context: Context())).to.beTrue()
+		}
+	}
+
+	func testExpressionParsing() {
+		it("can parse a variable expression") {
+			let expression = self.makeExpression(["value"])
+			try expect(expression.evaluate(context: Context())).to.beFalse()
+			try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beTrue()
+		}
+
+		it("can parse a not expression") {
+			let expression = self.makeExpression(["not", "value"])
+			try expect(expression.evaluate(context: Context())).to.beTrue()
+			try expect(expression.evaluate(context: Context(dictionary: ["value": true]))).to.beFalse()
+		}
+	}
+
+	func testAndExpression() {
+		let expression = makeExpression(["lhs", "and", "rhs"])
+
+		it("evaluates to false with lhs false") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beFalse()
+		}
+
+		it("evaluates to false with rhs false") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
+		}
+
+		it("evaluates to false with lhs and rhs false") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
+		}
+
+		it("evaluates to true with lhs and rhs true") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
+		}
+	}
+
+	func testOrExpression() {
+		let expression = makeExpression(["lhs", "or", "rhs"])
+
+		it("evaluates to true with lhs true") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beTrue()
+		}
+
+		it("evaluates to true with rhs true") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": true]))).to.beTrue()
+		}
+
+		it("evaluates to true with lhs and rhs true") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
+		}
+
+		it("evaluates to false with lhs and rhs false") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": false, "rhs": false]))).to.beFalse()
+		}
+	}
+
+	func testEqualityExpression() {
+		let expression = makeExpression(["lhs", "==", "rhs"])
+
+		it("evaluates to true with equal lhs/rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "a"]))).to.beTrue()
+		}
+
+		it("evaluates to false with non equal lhs/rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beFalse()
+		}
+
+		it("evaluates to true with nils") {
+			try expect(expression.evaluate(context: Context(dictionary: [:]))).to.beTrue()
+		}
+
+		it("evaluates to true with numbers") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.0]))).to.beTrue()
+		}
+
+		it("evaluates to false with non equal numbers") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 1, "rhs": 1.1]))).to.beFalse()
+		}
+
+		it("evaluates to true with booleans") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": true]))).to.beTrue()
+		}
+
+		it("evaluates to false with falsy booleans") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": false]))).to.beFalse()
+		}
+
+		it("evaluates to false with different types") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": true, "rhs": 1]))).to.beFalse()
+		}
+	}
+
+	func testInequalityExpression() {
+		let expression = makeExpression(["lhs", "!=", "rhs"])
+
+		it("evaluates to true with inequal lhs/rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": "a", "rhs": "b"]))).to.beTrue()
+		}
+
+		it("evaluates to false with equal lhs/rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": "b", "rhs": "b"]))).to.beFalse()
+		}
+	}
+
+	func testMoreThanExpression() {
+		let expression = makeExpression(["lhs", ">", "rhs"])
+
+		it("evaluates to true with lhs > rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 4]))).to.beTrue()
+		}
+
+		it("evaluates to false with lhs == rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
+		}
+	}
+
+	func testMoreThanEqualExpression() {
+		let expression = makeExpression(["lhs", ">=", "rhs"])
+
+		it("evaluates to true with lhs == rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
+		}
+
+		it("evaluates to false with lhs < rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.1]))).to.beFalse()
+		}
+	}
+
+	func testLessThanExpression() {
+		let expression = makeExpression(["lhs", "<", "rhs"])
+
+		it("evaluates to true with lhs < rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 4, "rhs": 4.5]))).to.beTrue()
+		}
+
+		it("evaluates to false with lhs == rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5.0]))).to.beFalse()
+		}
+	}
+
+	func testLessThanEqualExpression() {
+		let expression = makeExpression(["lhs", "<=", "rhs"])
+
+		it("evaluates to true with lhs == rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.0, "rhs": 5]))).to.beTrue()
+		}
+
+		it("evaluates to false with lhs > rhs") {
+			try expect(expression.evaluate(context: Context(dictionary: ["lhs": 5.1, "rhs": 5.0]))).to.beFalse()
+		}
+	}
+
+	func testMultipleExpressions() {
+		let expression = makeExpression(["one", "or", "two", "and", "not", "three"])
+
+		it("evaluates to true with one") {
+			try expect(expression.evaluate(context: Context(dictionary: ["one": true]))).to.beTrue()
+		}
+
+		it("evaluates to true with one and three") {
+			try expect(expression.evaluate(context: Context(dictionary: ["one": true, "three": true]))).to.beTrue()
+		}
+
+		it("evaluates to true with two") {
+			try expect(expression.evaluate(context: Context(dictionary: ["two": true]))).to.beTrue()
+		}
+
+		it("evaluates to false with two and three") {
+			try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
+		}
+
+		it("evaluates to false with two and three") {
+			try expect(expression.evaluate(context: Context(dictionary: ["two": true, "three": true]))).to.beFalse()
+		}
+
+		it("evaluates to false with nothing") {
+			try expect(expression.evaluate(context: Context())).to.beFalse()
+		}
+	}
+
+	func testTrueInExpression() throws {
+		let expression = makeExpression(["lhs", "in", "rhs"])
+
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 1,
+			"rhs": [1, 2, 3]
+		]))).to.beTrue()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": "a",
+			"rhs": ["a", "b", "c"]
+		]))).to.beTrue()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": "a",
+			"rhs": "abc"
+		]))).to.beTrue()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 1,
+			"rhs": 1...3
+		]))).to.beTrue()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 1,
+			"rhs": 1..<3
+		]))).to.beTrue()
+	}
+
+	func testFalseInExpression() throws {
+		let expression = makeExpression(["lhs", "in", "rhs"])
+
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 1,
+			"rhs": [2, 3, 4]
+		]))).to.beFalse()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": "a",
+			"rhs": ["b", "c", "d"]
+		]))).to.beFalse()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": "a",
+			"rhs": "bcd"
+		]))).to.beFalse()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 4,
+			"rhs": 1...3
+		]))).to.beFalse()
+		try expect(expression.evaluate(context: Context(dictionary: [
+			"lhs": 3,
+			"rhs": 1..<3
+		]))).to.beFalse()
+	}
 }

Tests/StencilTests/FilterSpec.swift

@@ -1,388 +1,382 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class FilterTests: XCTestCase {
-  func testRegistration() {
-    let context: [String: Any] = ["name": "Kyle"]
+	func testRegistration() {
+		let context: [String: Any] = ["name": "Kyle"]
 
-    it("allows you to register a custom filter") {
-      let template = Template(templateString: "{{ name|repeat }}")
+		it("allows you to register a custom filter") {
+			let template = Template(templateString: "{{ name|repeat }}")
 
-      let repeatExtension = Extension()
-      repeatExtension.registerFilter("repeat") { (value: Any?) in
-        if let value = value as? String {
-          return "\(value) \(value)"
-        }
+			let repeatExtension = Extension()
+			repeatExtension.registerFilter("repeat") { (value: Any?) in
+				if let value = value as? String {
+					return "\(value) \(value)"
+				}
 
-        return nil
-      }
+				return nil
+			}
 
-      let result = try template.render(Context(
-        dictionary: context,
-        environment: Environment(extensions: [repeatExtension])
-      ))
-      try expect(result) == "Kyle Kyle"
-    }
+			let result = try template.render(Context(
+				dictionary: context,
+				environment: Environment(extensions: [repeatExtension])
+			))
+			try expect(result) == "Kyle Kyle"
+		}
 
-    it("allows you to register boolean filters") {
-      let repeatExtension = Extension()
-      repeatExtension.registerFilter(name: "isPositive", negativeFilterName: "isNotPositive") { (value: Any?) in
-        if let value = value as? Int {
-          return value > 0
-        }
-        return nil
-      }
+		it("allows you to register boolean filters") {
+			let repeatExtension = Extension()
+			repeatExtension.registerFilter(name: "isPositive", negativeFilterName: "isNotPositive") { (value: Any?) in
+				if let value = value as? Int {
+					return value > 0
+				}
+				return nil
+			}
 
-      let result = try Template(templateString: "{{ value|isPositive }}")
-        .render(Context(dictionary: ["value": 1], environment: Environment(extensions: [repeatExtension])))
-      try expect(result) == "true"
+			let result = try Template(templateString: "{{ value|isPositive }}")
+				.render(Context(dictionary: ["value": 1], environment: Environment(extensions: [repeatExtension])))
+			try expect(result) == "true"
 
-      let negativeResult = try Template(templateString: "{{ value|isNotPositive }}")
-        .render(Context(dictionary: ["value": -1], environment: Environment(extensions: [repeatExtension])))
-      try expect(negativeResult) == "true"
-    }
+			let negativeResult = try Template(templateString: "{{ value|isNotPositive }}")
+				.render(Context(dictionary: ["value": -1], environment: Environment(extensions: [repeatExtension])))
+			try expect(negativeResult) == "true"
+		}
 
-    it("allows you to register a custom which throws") {
-      let template = Template(templateString: "{{ name|repeat }}")
-      let repeatExtension = Extension()
-      repeatExtension.registerFilter("repeat") { (_: Any?) in
-        throw TemplateSyntaxError("No Repeat")
-      }
+		it("allows you to register a custom which throws") {
+			let template = Template(templateString: "{{ name|repeat }}")
+			let repeatExtension = Extension()
+			repeatExtension.registerFilter("repeat") { (_: Any?) in
+				throw TemplateSyntaxError("No Repeat")
+			}
 
-      let context = Context(dictionary: context, environment: Environment(extensions: [repeatExtension]))
-      try expect(try template.render(context))
-        .toThrow(TemplateSyntaxError(reason: "No Repeat", token: template.tokens.first))
-    }
+			let context = Context(dictionary: context, environment: Environment(extensions: [repeatExtension]))
+			try expect(try template.render(context))
+				.toThrow(TemplateSyntaxError(reason: "No Repeat", token: template.tokens.first))
+		}
 
-    it("throws when you pass arguments to simple filter") {
-      let template = Template(templateString: "{{ name|uppercase:5 }}")
-      try expect(try template.render(Context(dictionary: ["name": "kyle"]))).toThrow()
-    }
-  }
+		it("throws when you pass arguments to simple filter") {
+			let template = Template(templateString: "{{ name|uppercase:5 }}")
+			try expect(try template.render(Context(dictionary: ["name": "kyle"]))).toThrow()
+		}
+	}
 
-  func testRegistrationOverrideDefault() throws {
-    let template = Template(templateString: "{{ name|join }}")
-    let context: [String: Any] = ["name": "Kyle"]
+	func testRegistrationOverrideDefault() throws {
+		let template = Template(templateString: "{{ name|join }}")
+		let context: [String: Any] = ["name": "Kyle"]
 
-    let repeatExtension = Extension()
-    repeatExtension.registerFilter("join") { (_: Any?) in
-      "joined"
-    }
+		let repeatExtension = Extension()
+		repeatExtension.registerFilter("join") { (_: Any?) in
+			"joined"
+		}
 
-    let result = try template.render(Context(
-      dictionary: context,
-      environment: Environment(extensions: [repeatExtension])
-    ))
-    try expect(result) == "joined"
-  }
+		let result = try template.render(Context(
+			dictionary: context,
+			environment: Environment(extensions: [repeatExtension])
+		))
+		try expect(result) == "joined"
+	}
 
-  func testRegistrationWithArguments() {
-    let context: [String: Any] = ["name": "Kyle"]
+	func testRegistrationWithArguments() {
+		let context: [String: Any] = ["name": "Kyle"]
 
-    it("allows you to register a custom filter which accepts single argument") {
-      let template = Template(templateString: """
-        {{ name|repeat:'value1, "value2"' }}
-        """)
+		it("allows you to register a custom filter which accepts single argument") {
+			let template = Template(templateString: """
+				{{ name|repeat:'value1, "value2"' }}
+				""")
 
-      let repeatExtension = Extension()
-      repeatExtension.registerFilter("repeat") { value, arguments in
-        guard let value = value,
-          let argument = arguments.first else { return nil }
+			let repeatExtension = Extension()
+			repeatExtension.registerFilter("repeat") { value, arguments in
+				guard let value = value,
+					let argument = arguments.first else { return nil }
 
-        return "\(value) \(value) with args \(argument ?? "")"
-      }
+				return "\(value) \(value) with args \(argument ?? "")"
+			}
 
-      let result = try template.render(Context(
-        dictionary: context,
-        environment: Environment(extensions: [repeatExtension])
-      ))
-      try expect(result) == """
-        Kyle Kyle with args value1, "value2"
-        """
-    }
+			let result = try template.render(Context(
+				dictionary: context,
+				environment: Environment(extensions: [repeatExtension])
+			))
+			try expect(result) == """
+				Kyle Kyle with args value1, "value2"
+				"""
+		}
 
-    it("allows you to register a custom filter which accepts several arguments") {
-      let template = Template(templateString: """
-        {{ name|repeat:'value"1"',"value'2'",'(key, value)' }}
-        """)
+		it("allows you to register a custom filter which accepts several arguments") {
+			let template = Template(templateString: """
+				{{ name|repeat:'value"1"',"value'2'",'(key, value)' }}
+				""")
 
-      let repeatExtension = Extension()
-      repeatExtension.registerFilter("repeat") { value, arguments in
-        guard let value = value else { return nil }
-        let args = arguments.compactMap { $0 }
-        return "\(value) \(value) with args 0: \(args[0]), 1: \(args[1]), 2: \(args[2])"
-      }
+			let repeatExtension = Extension()
+			repeatExtension.registerFilter("repeat") { value, arguments in
+				guard let value = value else { return nil }
+				let args = arguments.compactMap { $0 }
+				return "\(value) \(value) with args 0: \(args[0]), 1: \(args[1]), 2: \(args[2])"
+			}
 
-      let result = try template.render(Context(
-        dictionary: context,
-        environment: Environment(extensions: [repeatExtension])
-      ))
-      try expect(result) == """
-        Kyle Kyle with args 0: value"1", 1: value'2', 2: (key, value)
-        """
-    }
+			let result = try template.render(Context(
+				dictionary: context,
+				environment: Environment(extensions: [repeatExtension])
+			))
+			try expect(result) == """
+				Kyle Kyle with args 0: value"1", 1: value'2', 2: (key, value)
+				"""
+		}
 
-    it("allows whitespace in expression") {
-      let template = Template(templateString: """
-        {{ value | join : ", " }}
-        """)
-      let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
-      try expect(result) == "One, Two"
-    }
-  }
+		it("allows whitespace in expression") {
+			let template = Template(templateString: """
+				{{ value | join : ", " }}
+				""")
+			let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
+			try expect(result) == "One, Two"
+		}
+	}
 
-  func testStringFilters() {
-    it("transforms a string to be capitalized") {
-      let template = Template(templateString: "{{ name|capitalize }}")
-      let result = try template.render(Context(dictionary: ["name": "kyle"]))
-      try expect(result) == "Kyle"
-    }
+	func testStringFilters() {
+		it("transforms a string to be capitalized") {
+			let template = Template(templateString: "{{ name|capitalize }}")
+			let result = try template.render(Context(dictionary: ["name": "kyle"]))
+			try expect(result) == "Kyle"
+		}
 
-    it("transforms a string to be uppercase") {
-      let template = Template(templateString: "{{ name|uppercase }}")
-      let result = try template.render(Context(dictionary: ["name": "kyle"]))
-      try expect(result) == "KYLE"
-    }
+		it("transforms a string to be uppercase") {
+			let template = Template(templateString: "{{ name|uppercase }}")
+			let result = try template.render(Context(dictionary: ["name": "kyle"]))
+			try expect(result) == "KYLE"
+		}
 
-    it("transforms a string to be lowercase") {
-      let template = Template(templateString: "{{ name|lowercase }}")
-      let result = try template.render(Context(dictionary: ["name": "Kyle"]))
-      try expect(result) == "kyle"
-    }
-  }
+		it("transforms a string to be lowercase") {
+			let template = Template(templateString: "{{ name|lowercase }}")
+			let result = try template.render(Context(dictionary: ["name": "Kyle"]))
+			try expect(result) == "kyle"
+		}
+	}
 
-  func testStringFiltersWithArrays() {
-    it("transforms a string to be capitalized") {
-      let template = Template(templateString: "{{ names|capitalize }}")
-      let result = try template.render(Context(dictionary: ["names": ["kyle", "kyle"]]))
-      try expect(result) == """
-        ["Kyle", "Kyle"]
-        """
-    }
+	func testStringFiltersWithArrays() {
+		it("transforms a string to be capitalized") {
+			let template = Template(templateString: "{{ names|capitalize }}")
+			let result = try template.render(Context(dictionary: ["names": ["kyle", "kyle"]]))
+			try expect(result) == """
+				["Kyle", "Kyle"]
+				"""
+		}
 
-    it("transforms a string to be uppercase") {
-      let template = Template(templateString: "{{ names|uppercase }}")
-      let result = try template.render(Context(dictionary: ["names": ["kyle", "kyle"]]))
-      try expect(result) == """
-        ["KYLE", "KYLE"]
-        """
-    }
+		it("transforms a string to be uppercase") {
+			let template = Template(templateString: "{{ names|uppercase }}")
+			let result = try template.render(Context(dictionary: ["names": ["kyle", "kyle"]]))
+			try expect(result) == """
+				["KYLE", "KYLE"]
+				"""
+		}
 
-    it("transforms a string to be lowercase") {
-      let template = Template(templateString: "{{ names|lowercase }}")
-      let result = try template.render(Context(dictionary: ["names": ["Kyle", "Kyle"]]))
-      try expect(result) == """
-        ["kyle", "kyle"]
-        """
-    }
-  }
+		it("transforms a string to be lowercase") {
+			let template = Template(templateString: "{{ names|lowercase }}")
+			let result = try template.render(Context(dictionary: ["names": ["Kyle", "Kyle"]]))
+			try expect(result) == """
+				["kyle", "kyle"]
+				"""
+		}
+	}
 
-  func testDefaultFilter() {
-    let template = Template(templateString: """
-      Hello {{ name|default:"World" }}
-      """)
+	func testDefaultFilter() {
+		let template = Template(templateString: """
+			Hello {{ name|default:"World" }}
+			""")
 
-    it("shows the variable value") {
-      let result = try template.render(Context(dictionary: ["name": "Kyle"]))
-      try expect(result) == "Hello Kyle"
-    }
+		it("shows the variable value") {
+			let result = try template.render(Context(dictionary: ["name": "Kyle"]))
+			try expect(result) == "Hello Kyle"
+		}
 
-    it("shows the default value") {
-      let result = try template.render(Context(dictionary: [:]))
-      try expect(result) == "Hello World"
-    }
+		it("shows the default value") {
+			let result = try template.render(Context(dictionary: [:]))
+			try expect(result) == "Hello World"
+		}
 
-    it("supports multiple defaults") {
-      let template = Template(templateString: """
-        Hello {{ name|default:a,b,c,"World" }}
-        """)
-      let result = try template.render(Context(dictionary: [:]))
-      try expect(result) == "Hello World"
-    }
+		it("supports multiple defaults") {
+			let template = Template(templateString: """
+				Hello {{ name|default:a,b,c,"World" }}
+				""")
+			let result = try template.render(Context(dictionary: [:]))
+			try expect(result) == "Hello World"
+		}
 
-    it("can use int as default") {
-      let template = Template(templateString: "{{ value|default:1 }}")
-      let result = try template.render(Context(dictionary: [:]))
-      try expect(result) == "1"
-    }
+		it("can use int as default") {
+			let template = Template(templateString: "{{ value|default:1 }}")
+			let result = try template.render(Context(dictionary: [:]))
+			try expect(result) == "1"
+		}
 
-    it("can use float as default") {
-      let template = Template(templateString: "{{ value|default:1.5 }}")
-      let result = try template.render(Context(dictionary: [:]))
-      try expect(result) == "1.5"
-    }
+		it("can use float as default") {
+			let template = Template(templateString: "{{ value|default:1.5 }}")
+			let result = try template.render(Context(dictionary: [:]))
+			try expect(result) == "1.5"
+		}
 
-    it("checks for underlying nil value correctly") {
-      let template = Template(templateString: """
-        Hello {{ user.name|default:"anonymous" }}
-        """)
-      let nilName: String? = nil
-      let user: [String: Any?] = ["name": nilName]
-      let result = try template.render(Context(dictionary: ["user": user]))
-      try expect(result) == "Hello anonymous"
-    }
-  }
+		it("checks for underlying nil value correctly") {
+			let template = Template(templateString: """
+				Hello {{ user.name|default:"anonymous" }}
+				""")
+			let nilName: String? = nil
+			let user: [String: Any?] = ["name": nilName]
+			let result = try template.render(Context(dictionary: ["user": user]))
+			try expect(result) == "Hello anonymous"
+		}
+	}
 
-  func testJoinFilter() {
-    let template = Template(templateString: """
-      {{ value|join:", " }}
-      """)
+	func testJoinFilter() {
+		let template = Template(templateString: """
+			{{ value|join:", " }}
+			""")
 
-    it("joins a collection of strings") {
-      let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
-      try expect(result) == "One, Two"
-    }
+		it("joins a collection of strings") {
+			let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
+			try expect(result) == "One, Two"
+		}
 
-    it("joins a mixed-type collection") {
-      let result = try template.render(Context(dictionary: ["value": ["One", 2, true, 10.5, "Five"]]))
-      try expect(result) == "One, 2, true, 10.5, Five"
-    }
+		it("joins a mixed-type collection") {
+			let result = try template.render(Context(dictionary: ["value": ["One", 2, true, 10.5, "Five"]]))
+			try expect(result) == "One, 2, true, 10.5, Five"
+		}
 
-    it("can join by non string") {
-      let template = Template(templateString: """
-        {{ value|join:separator }}
-        """)
-      let result = try template.render(Context(dictionary: ["value": ["One", "Two"], "separator": true]))
-      try expect(result) == "OnetrueTwo"
-    }
+		it("can join by non string") {
+			let template = Template(templateString: """
+				{{ value|join:separator }}
+				""")
+			let result = try template.render(Context(dictionary: ["value": ["One", "Two"], "separator": true]))
+			try expect(result) == "OnetrueTwo"
+		}
 
-    it("can join without arguments") {
-      let template = Template(templateString: """
-        {{ value|join }}
-        """)
-      let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
-      try expect(result) == "OneTwo"
-    }
-  }
+		it("can join without arguments") {
+			let template = Template(templateString: """
+				{{ value|join }}
+				""")
+			let result = try template.render(Context(dictionary: ["value": ["One", "Two"]]))
+			try expect(result) == "OneTwo"
+		}
+	}
 
-  func testSplitFilter() {
-    let template = Template(templateString: """
-      {{ value|split:", " }}
-      """)
+	func testSplitFilter() {
+		let template = Template(templateString: """
+			{{ value|split:", " }}
+			""")
 
-    it("split a string into array") {
-      let result = try template.render(Context(dictionary: ["value": "One, Two"]))
-      try expect(result) == """
-        ["One", "Two"]
-        """
-    }
+		it("split a string into array") {
+			let result = try template.render(Context(dictionary: ["value": "One, Two"]))
+			try expect(result) == """
+				["One", "Two"]
+				"""
+		}
 
-    it("can split without arguments") {
-      let template = Template(templateString: """
-        {{ value|split }}
-        """)
-      let result = try template.render(Context(dictionary: ["value": "One, Two"]))
-      try expect(result) == """
-        ["One,", "Two"]
-        """
-    }
-  }
+		it("can split without arguments") {
+			let template = Template(templateString: """
+				{{ value|split }}
+				""")
+			let result = try template.render(Context(dictionary: ["value": "One, Two"]))
+			try expect(result) == """
+				["One,", "Two"]
+				"""
+		}
+	}
 
-  func testFilterSuggestion() {
-    it("made for unknown filter") {
-      let template = Template(templateString: "{{ value|unknownFilter }}")
-      let filterExtension = Extension()
-      filterExtension.registerFilter("knownFilter") { value, _ in value }
+	func testFilterSuggestion() {
+		it("made for unknown filter") {
+			let template = Template(templateString: "{{ value|unknownFilter }}")
+			let filterExtension = Extension()
+			filterExtension.registerFilter("knownFilter") { value, _ in value }
 
-      try self.expectError(
-        reason: "Unknown filter 'unknownFilter'. Found similar filters: 'knownFilter'.",
-        token: "value|unknownFilter",
-        template: template,
-        extension: filterExtension
-      )
-    }
+			try self.expectError(
+				reason: "Unknown filter 'unknownFilter'. Found similar filters: 'knownFilter'.",
+				token: "value|unknownFilter",
+				template: template,
+				extension: filterExtension
+			)
+		}
 
-    it("made for multiple similar filters") {
-      let template = Template(templateString: "{{ value|lowerFirst }}")
-      let filterExtension = Extension()
-      filterExtension.registerFilter("lowerFirstWord") { value, _ in value }
-      filterExtension.registerFilter("lowerFirstLetter") { value, _ in value }
+		it("made for multiple similar filters") {
+			let template = Template(templateString: "{{ value|lowerFirst }}")
+			let filterExtension = Extension()
+			filterExtension.registerFilter("lowerFirstWord") { value, _ in value }
+			filterExtension.registerFilter("lowerFirstLetter") { value, _ in value }
 
-      try self.expectError(
-        reason: "Unknown filter 'lowerFirst'. Found similar filters: 'lowerFirstWord', 'lowercase'.",
-        token: "value|lowerFirst",
-        template: template,
-        extension: filterExtension
-      )
-    }
+			try self.expectError(
+				reason: "Unknown filter 'lowerFirst'. Found similar filters: 'lowerFirstWord', 'lowercase'.",
+				token: "value|lowerFirst",
+				template: template,
+				extension: filterExtension
+			)
+		}
 
-    it("not made when can't find similar filter") {
-      let template = Template(templateString: "{{ value|unknownFilter }}")
-      let filterExtension = Extension()
-      filterExtension.registerFilter("lowerFirstWord") { value, _ in value }
+		it("not made when can't find similar filter") {
+			let template = Template(templateString: "{{ value|unknownFilter }}")
+			let filterExtension = Extension()
+			filterExtension.registerFilter("lowerFirstWord") { value, _ in value }
 
-      try self.expectError(
-        reason: "Unknown filter 'unknownFilter'. Found similar filters: 'lowerFirstWord'.",
-        token: "value|unknownFilter",
-        template: template,
-        extension: filterExtension
-      )
-    }
-  }
+			try self.expectError(
+				reason: "Unknown filter 'unknownFilter'. Found similar filters: 'lowerFirstWord'.",
+				token: "value|unknownFilter",
+				template: template,
+				extension: filterExtension
+			)
+		}
+	}
 
-  func testIndentContent() throws {
-    let template = Template(templateString: """
+	func testIndentContent() throws {
+		let template = Template(templateString: """
       {{ value|indent:2 }}
       """)
-    let result = try template.render(Context(dictionary: [
-      "value": """
+		let result = try template.render(Context(dictionary: [
+			"value": """
       One
       Two
       """
-    ]))
-    try expect(result) == """
+		]))
+		try expect(result) == """
       One
         Two
       """
-  }
+	}
 
-  func testIndentWithArbitraryCharacter() throws {
-    let template = Template(templateString: """
+	func testIndentWithArbitraryCharacter() throws {
+		let template = Template(templateString: """
       {{ value|indent:2,"\t" }}
       """)
-    let result = try template.render(Context(dictionary: [
-      "value": """
+		let result = try template.render(Context(dictionary: [
+			"value": """
       One
       Two
       """
-    ]))
-    try expect(result) == """
-      One
-      \t\tTwo
-      """
-  }
+		]))
+		try expect(result) == """
+    One
+    \t\tTwo
+    """
+	}
 
-  func testIndentFirstLine() throws {
-    let template = Template(templateString: """
-      {{ value|indent:2," ",true }}
-      """)
-    let result = try template.render(Context(dictionary: [
-      "value": """
+	func testIndentFirstLine() throws {
+		let template = Template(templateString: """
+			{{ value|indent:2," ",true }}
+			""")
+		let result = try template.render(Context(dictionary: [
+			"value": """
       One
       Two
       """
-    ]))
-    // swiftlint:disable indentation_width
-    try expect(result) == """
+		]))
+		// swiftlint:disable indentation_width
+		try expect(result) == """
         One
         Two
       """
-    // swiftlint:enable indentation_width
-  }
+		// swiftlint:enable indentation_width
+	}
 
-  func testIndentNotEmptyLines() throws {
-    let template = Template(templateString: """
-      {{ value|indent }}
-      """)
-    let result = try template.render(Context(dictionary: [
-      "value": """
+	func testIndentNotEmptyLines() throws {
+		let template = Template(templateString: """
+			{{ value|indent }}
+			""")
+		let result = try template.render(Context(dictionary: [
+			"value": """
       One
 
 
@@ -390,9 +384,9 @@ final class FilterTests: XCTestCase {
 
 
       """
-    ]))
-    // swiftlint:disable indentation_width
-    try expect(result) == """
+		]))
+		// swiftlint:disable indentation_width
+		try expect(result) == """
       One
 
 
@@ -400,64 +394,64 @@ final class FilterTests: XCTestCase {
 
 
       """
-    // swiftlint:enable indentation_width
-  }
+		// swiftlint:enable indentation_width
+	}
 
-  func testDynamicFilters() throws {
-    it("can apply dynamic filter") {
-      let template = Template(templateString: "{{ name|filter:somefilter }}")
-      let result = try template.render(Context(dictionary: ["name": "Jhon", "somefilter": "uppercase"]))
-      try expect(result) == "JHON"
-    }
+	func testDynamicFilters() throws {
+		it("can apply dynamic filter") {
+			let template = Template(templateString: "{{ name|filter:somefilter }}")
+			let result = try template.render(Context(dictionary: ["name": "Jhon", "somefilter": "uppercase"]))
+			try expect(result) == "JHON"
+		}
 
-    it("can apply dynamic filter on array") {
-      let template = Template(templateString: "{{ values|filter:joinfilter }}")
-      let result = try template.render(Context(dictionary: ["values": [1, 2, 3], "joinfilter": "join:\", \""]))
-      try expect(result) == "1, 2, 3"
-    }
+		it("can apply dynamic filter on array") {
+			let template = Template(templateString: "{{ values|filter:joinfilter }}")
+			let result = try template.render(Context(dictionary: ["values": [1, 2, 3], "joinfilter": "join:\", \""]))
+			try expect(result) == "1, 2, 3"
+		}
 
-    it("throws on unknown dynamic filter") {
-      let template = Template(templateString: "{{ values|filter:unknown }}")
-      let context = Context(dictionary: ["values": [1, 2, 3], "unknown": "absurd"])
-      try expect(try template.render(context)).toThrow()
-    }
-  }
+		it("throws on unknown dynamic filter") {
+			let template = Template(templateString: "{{ values|filter:unknown }}")
+			let context = Context(dictionary: ["values": [1, 2, 3], "unknown": "absurd"])
+			try expect(try template.render(context)).toThrow()
+		}
+	}
 
-  private func expectError(
-    reason: String,
-    token: String,
-    template: Template,
-    extension: Extension,
-    file: String = #file,
-    line: Int = #line,
-    function: String = #function
-  ) throws {
-    guard let range = template.templateString.range(of: token) else {
-      fatalError("Can't find '\(token)' in '\(template)'")
-    }
+	private func expectError(
+		reason: String,
+		token: String,
+		template: Template,
+		extension: Extension,
+		file: String = #file,
+		line: Int = #line,
+		function: String = #function
+	) throws {
+		guard let range = template.templateString.range(of: token) else {
+			fatalError("Can't find '\(token)' in '\(template)'")
+		}
 
-    let environment = Environment(extensions: [`extension`])
-    let expectedError: Error = {
-      let lexer = Lexer(templateString: template.templateString)
-      let location = lexer.rangeLocation(range)
-      let sourceMap = SourceMap(filename: template.name, location: location)
-      let token = Token.block(value: token, at: sourceMap)
-      return TemplateSyntaxError(reason: reason, token: token, stackTrace: [])
-    }()
+		let environment = Environment(extensions: [`extension`])
+		let expectedError: Error = {
+			let lexer = Lexer(templateString: template.templateString)
+			let location = lexer.rangeLocation(range)
+			let sourceMap = SourceMap(filename: template.name, location: location)
+			let token = Token.block(value: token, at: sourceMap)
+			return TemplateSyntaxError(reason: reason, token: token, stackTrace: [])
+		}()
 
-    let error = try expect(
-      environment.render(template: template, context: [:]),
-      file: file,
-      line: line,
-      function: function
-    ).toThrow() as TemplateSyntaxError
-    let reporter = SimpleErrorReporter()
+		let error = try expect(
+			environment.render(template: template, context: [:]),
+			file: file,
+			line: line,
+			function: function
+		).toThrow() as TemplateSyntaxError
+		let reporter = SimpleErrorReporter()
 
-    try expect(
-      reporter.renderError(error),
-      file: file,
-      line: line,
-      function: function
-    ) == reporter.renderError(expectedError)
-  }
+		try expect(
+			reporter.renderError(error),
+			file: file,
+			line: line,
+			function: function
+		) == reporter.renderError(expectedError)
+	}
 }

Tests/StencilTests/FilterTagSpec.swift

@@ -1,60 +1,54 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 import Stencil
 import XCTest
 
 final class FilterTagTests: XCTestCase {
-  func testFilterTag() {
-    it("allows you to use a filter") {
-      let template = Template(templateString: "{% filter uppercase %}Test{% endfilter %}")
-      let result = try template.render()
-      try expect(result) == "TEST"
-    }
+	func testFilterTag() {
+		it("allows you to use a filter") {
+			let template = Template(templateString: "{% filter uppercase %}Test{% endfilter %}")
+			let result = try template.render()
+			try expect(result) == "TEST"
+		}
 
-    it("allows you to chain filters") {
-      let template = Template(templateString: "{% filter lowercase|capitalize %}TEST{% endfilter %}")
-      let result = try template.render()
-      try expect(result) == "Test"
-    }
+		it("allows you to chain filters") {
+			let template = Template(templateString: "{% filter lowercase|capitalize %}TEST{% endfilter %}")
+			let result = try template.render()
+			try expect(result) == "Test"
+		}
 
-    it("errors without a filter") {
-      let template = Template(templateString: "Some {% filter %}Test{% endfilter %}")
-      try expect(try template.render()).toThrow()
-    }
+		it("errors without a filter") {
+			let template = Template(templateString: "Some {% filter %}Test{% endfilter %}")
+			try expect(try template.render()).toThrow()
+		}
 
-    it("can render filters with arguments") {
-      let ext = Extension()
-      ext.registerFilter("split") { value, args in
-        guard let value = value as? String,
-          let argument = args.first as? String else { return value }
-        return value.components(separatedBy: argument)
-      }
-      let env = Environment(extensions: [ext])
-      let result = try env.renderTemplate(string: """
-        {% filter split:","|join:";"  %}{{ items|join:"," }}{% endfilter %}
-        """, context: ["items": [1, 2]])
-      try expect(result) == "1;2"
-    }
+		it("can render filters with arguments") {
+			let ext = Extension()
+			ext.registerFilter("split") { value, args in
+				guard let value = value as? String,
+					let argument = args.first as? String else { return value }
+				return value.components(separatedBy: argument)
+			}
+			let env = Environment(extensions: [ext])
+			let result = try env.renderTemplate(string: """
+				{% filter split:","|join:";" %}{{ items|join:"," }}{% endfilter %}
+				""", context: ["items": [1, 2]])
+			try expect(result) == "1;2"
+		}
 
-    it("can render filters with quote as an argument") {
-      let ext = Extension()
-      ext.registerFilter("replace") { value, args in
-        guard let value = value as? String,
-          args.count == 2,
-          let search = args.first as? String,
-          let replacement = args.last as? String else { return value }
-        return value.replacingOccurrences(of: search, with: replacement)
-      }
-      let env = Environment(extensions: [ext])
-      let result = try env.renderTemplate(string: """
-        {% filter replace:'"',"" %}{{ items|join:"," }}{% endfilter %}
-        """, context: ["items": ["\"1\"", "\"2\""]])
-      try expect(result) == "1,2"
-    }
-  }
+		it("can render filters with quote as an argument") {
+			let ext = Extension()
+			ext.registerFilter("replace") { value, args in
+				guard let value = value as? String,
+					args.count == 2,
+					let search = args.first as? String,
+					let replacement = args.last as? String else { return value }
+				return value.replacingOccurrences(of: search, with: replacement)
+			}
+			let env = Environment(extensions: [ext])
+			let result = try env.renderTemplate(string: """
+				{% filter replace:'"',"" %}{{ items|join:"," }}{% endfilter %}
+				""", context: ["items": ["\"1\"", "\"2\""]])
+			try expect(result) == "1,2"
+		}
+	}
 }

Tests/StencilTests/Helpers.swift

@@ -1,69 +1,63 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 extension Expectation {
-  @discardableResult
-  func toThrow<T: Error>() throws -> T {
-    var thrownError: Error?
+	@discardableResult
+	func toThrow<E: Error>() throws -> E {
+		var thrownError: Error?
 
-    do {
-      _ = try expression()
-    } catch {
-      thrownError = error
-    }
+		do {
+			_ = try expression()
+		} catch {
+			thrownError = error
+		}
 
-    if let thrownError = thrownError {
-      if let thrownError = thrownError as? T {
-        return thrownError
-      } else {
-        throw failure("\(thrownError) is not \(T.self)")
-      }
-    } else {
-      throw failure("expression did not throw an error")
-    }
-  }
+		if let thrownError = thrownError {
+			if let thrownError = thrownError as? E {
+				return thrownError
+			} else {
+				throw failure("\(thrownError) is not \(T.self)")
+			}
+		} else {
+			throw failure("expression did not throw an error")
+		}
+	}
 }
 
 extension XCTestCase {
-  func expectedSyntaxError(token: String, template: Template, description: String) -> TemplateSyntaxError {
-    guard let range = template.templateString.range(of: token) else {
-      fatalError("Can't find '\(token)' in '\(template)'")
-    }
-    let lexer = Lexer(templateString: template.templateString)
-    let location = lexer.rangeLocation(range)
-    let sourceMap = SourceMap(filename: template.name, location: location)
-    let token = Token.block(value: token, at: sourceMap)
-    return TemplateSyntaxError(reason: description, token: token, stackTrace: [])
-  }
+	func expectedSyntaxError(token: String, template: Template, description: String) -> TemplateSyntaxError {
+		guard let range = template.templateString.range(of: token) else {
+			fatalError("Can't find '\(token)' in '\(template)'")
+		}
+		let lexer = Lexer(templateString: template.templateString)
+		let location = lexer.rangeLocation(range)
+		let sourceMap = SourceMap(filename: template.name, location: location)
+		let token = Token.block(value: token, at: sourceMap)
+		return TemplateSyntaxError(reason: description, token: token, stackTrace: [])
+	}
 }
 
 // MARK: - Test Types
 
 class ExampleLoader: Loader {
-  func loadTemplate(name: String, environment: Environment) throws -> Template {
-    if name == "example.html" {
-      return Template(templateString: "Hello World!", environment: environment, name: name)
-    }
+	func loadTemplate(name: String, environment: Environment) throws -> Template {
+		if name == "example.html" {
+			return Template(templateString: "Hello World!", environment: environment, name: name)
+		}
 
-    throw TemplateDoesNotExist(templateNames: [name], loader: self)
-  }
+		throw TemplateDoesNotExist(templateNames: [name], loader: self)
+	}
 }
 
 class ErrorNode: NodeType {
-  let token: Token?
-  init(token: Token? = nil) {
-    self.token = token
-  }
+	let token: Token?
+	init(token: Token? = nil) {
+		self.token = token
+	}
 
-  func render(_ context: Context) throws -> String {
-    throw TemplateSyntaxError("Custom Error")
-  }
+	func render(_ context: Context) throws -> String {
+		throw TemplateSyntaxError("Custom Error")
+	}
 }

Tests/StencilTests/IfNodeSpec.swift

@@ -1,296 +1,290 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class IfNodeTests: XCTestCase {
-  func testParseIf() {
-    it("can parse an if block") {
-      let tokens: [Token] = [
-        .block(value: "if value", at: .unknown),
-        .text(value: "true", at: .unknown),
-        .block(value: "endif", at: .unknown)
-      ]
+	func testParseIf() {
+		it("can parse an if block") {
+			let tokens: [Token] = [
+				.block(value: "if value", at: .unknown),
+				.text(value: "true", at: .unknown),
+				.block(value: "endif", at: .unknown)
+			]
 
-      let parser = TokenParser(tokens: tokens, environment: Environment())
-      let nodes = try parser.parse()
-      let node = nodes.first as? IfNode
+			let parser = TokenParser(tokens: tokens, environment: Environment())
+			let nodes = try parser.parse()
+			let node = nodes.first as? IfNode
 
-      let conditions = node?.conditions
-      try expect(conditions?.count) == 1
-      try expect(conditions?[0].nodes.count) == 1
-      let trueNode = conditions?[0].nodes.first as? TextNode
-      try expect(trueNode?.text) == "true"
-    }
+			let conditions = node?.conditions
+			try expect(conditions?.count) == 1
+			try expect(conditions?[0].nodes.count) == 1
+			let trueNode = conditions?[0].nodes.first as? TextNode
+			try expect(trueNode?.text) == "true"
+		}
 
-    it("can parse an if with complex expression") {
-      let tokens: [Token] = [
-        .block(value: """
-          if value == \"test\" and (not name or not (name and surname) or( some )and other )
-          """, at: .unknown),
-        .text(value: "true", at: .unknown),
-        .block(value: "endif", at: .unknown)
-      ]
+		it("can parse an if with complex expression") {
+			let tokens: [Token] = [
+				.block(value: """
+					if value == \"test\" and (not name or not (name and surname) or( some )and other )
+					""", at: .unknown),
+				.text(value: "true", at: .unknown),
+				.block(value: "endif", at: .unknown)
+			]
 
-      let parser = TokenParser(tokens: tokens, environment: Environment())
-      let nodes = try parser.parse()
-      try expect(nodes.first is IfNode).beTrue()
-    }
-  }
+			let parser = TokenParser(tokens: tokens, environment: Environment())
+			let nodes = try parser.parse()
+			try expect(nodes.first is IfNode).beTrue()
+		}
+	}
 
-  func testParseIfWithElse() throws {
-    let tokens: [Token] = [
-      .block(value: "if value", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "else", at: .unknown),
-      .text(value: "false", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testParseIfWithElse() throws {
+		let tokens: [Token] = [
+			.block(value: "if value", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "else", at: .unknown),
+			.text(value: "false", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
-    let node = nodes.first as? IfNode
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
+		let node = nodes.first as? IfNode
 
-    let conditions = node?.conditions
-    try expect(conditions?.count) == 2
+		let conditions = node?.conditions
+		try expect(conditions?.count) == 2
 
-    try expect(conditions?[0].nodes.count) == 1
-    let trueNode = conditions?[0].nodes.first as? TextNode
-    try expect(trueNode?.text) == "true"
+		try expect(conditions?[0].nodes.count) == 1
+		let trueNode = conditions?[0].nodes.first as? TextNode
+		try expect(trueNode?.text) == "true"
 
-    try expect(conditions?[1].nodes.count) == 1
-    let falseNode = conditions?[1].nodes.first as? TextNode
-    try expect(falseNode?.text) == "false"
-  }
+		try expect(conditions?[1].nodes.count) == 1
+		let falseNode = conditions?[1].nodes.first as? TextNode
+		try expect(falseNode?.text) == "false"
+	}
 
-  func testParseIfWithElif() throws {
-    let tokens: [Token] = [
-      .block(value: "if value", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "elif something", at: .unknown),
-      .text(value: "some", at: .unknown),
-      .block(value: "else", at: .unknown),
-      .text(value: "false", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testParseIfWithElif() throws {
+		let tokens: [Token] = [
+			.block(value: "if value", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "elif something", at: .unknown),
+			.text(value: "some", at: .unknown),
+			.block(value: "else", at: .unknown),
+			.text(value: "false", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
-    let node = nodes.first as? IfNode
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
+		let node = nodes.first as? IfNode
 
-    let conditions = node?.conditions
-    try expect(conditions?.count) == 3
+		let conditions = node?.conditions
+		try expect(conditions?.count) == 3
 
-    try expect(conditions?[0].nodes.count) == 1
-    let trueNode = conditions?[0].nodes.first as? TextNode
-    try expect(trueNode?.text) == "true"
+		try expect(conditions?[0].nodes.count) == 1
+		let trueNode = conditions?[0].nodes.first as? TextNode
+		try expect(trueNode?.text) == "true"
 
-    try expect(conditions?[1].nodes.count) == 1
-    let elifNode = conditions?[1].nodes.first as? TextNode
-    try expect(elifNode?.text) == "some"
+		try expect(conditions?[1].nodes.count) == 1
+		let elifNode = conditions?[1].nodes.first as? TextNode
+		try expect(elifNode?.text) == "some"
 
-    try expect(conditions?[2].nodes.count) == 1
-    let falseNode = conditions?[2].nodes.first as? TextNode
-    try expect(falseNode?.text) == "false"
-  }
+		try expect(conditions?[2].nodes.count) == 1
+		let falseNode = conditions?[2].nodes.first as? TextNode
+		try expect(falseNode?.text) == "false"
+	}
 
-  func testParseIfWithElifWithoutElse() throws {
-    let tokens: [Token] = [
-      .block(value: "if value", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "elif something", at: .unknown),
-      .text(value: "some", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testParseIfWithElifWithoutElse() throws {
+		let tokens: [Token] = [
+			.block(value: "if value", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "elif something", at: .unknown),
+			.text(value: "some", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
-    let node = nodes.first as? IfNode
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
+		let node = nodes.first as? IfNode
 
-    let conditions = node?.conditions
-    try expect(conditions?.count) == 2
+		let conditions = node?.conditions
+		try expect(conditions?.count) == 2
 
-    try expect(conditions?[0].nodes.count) == 1
-    let trueNode = conditions?[0].nodes.first as? TextNode
-    try expect(trueNode?.text) == "true"
+		try expect(conditions?[0].nodes.count) == 1
+		let trueNode = conditions?[0].nodes.first as? TextNode
+		try expect(trueNode?.text) == "true"
 
-    try expect(conditions?[1].nodes.count) == 1
-    let elifNode = conditions?[1].nodes.first as? TextNode
-    try expect(elifNode?.text) == "some"
-  }
+		try expect(conditions?[1].nodes.count) == 1
+		let elifNode = conditions?[1].nodes.first as? TextNode
+		try expect(elifNode?.text) == "some"
+	}
 
-  func testParseMultipleElif() throws {
-    let tokens: [Token] = [
-      .block(value: "if value", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "elif something1", at: .unknown),
-      .text(value: "some1", at: .unknown),
-      .block(value: "elif something2", at: .unknown),
-      .text(value: "some2", at: .unknown),
-      .block(value: "else", at: .unknown),
-      .text(value: "false", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testParseMultipleElif() throws {
+		let tokens: [Token] = [
+			.block(value: "if value", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "elif something1", at: .unknown),
+			.text(value: "some1", at: .unknown),
+			.block(value: "elif something2", at: .unknown),
+			.text(value: "some2", at: .unknown),
+			.block(value: "else", at: .unknown),
+			.text(value: "false", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
-    let node = nodes.first as? IfNode
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
+		let node = nodes.first as? IfNode
 
-    let conditions = node?.conditions
-    try expect(conditions?.count) == 4
+		let conditions = node?.conditions
+		try expect(conditions?.count) == 4
 
-    try expect(conditions?[0].nodes.count) == 1
-    let trueNode = conditions?[0].nodes.first as? TextNode
-    try expect(trueNode?.text) == "true"
+		try expect(conditions?[0].nodes.count) == 1
+		let trueNode = conditions?[0].nodes.first as? TextNode
+		try expect(trueNode?.text) == "true"
 
-    try expect(conditions?[1].nodes.count) == 1
-    let elifNode = conditions?[1].nodes.first as? TextNode
-    try expect(elifNode?.text) == "some1"
+		try expect(conditions?[1].nodes.count) == 1
+		let elifNode = conditions?[1].nodes.first as? TextNode
+		try expect(elifNode?.text) == "some1"
 
-    try expect(conditions?[2].nodes.count) == 1
-    let elif2Node = conditions?[2].nodes.first as? TextNode
-    try expect(elif2Node?.text) == "some2"
+		try expect(conditions?[2].nodes.count) == 1
+		let elif2Node = conditions?[2].nodes.first as? TextNode
+		try expect(elif2Node?.text) == "some2"
 
-    try expect(conditions?[3].nodes.count) == 1
-    let falseNode = conditions?[3].nodes.first as? TextNode
-    try expect(falseNode?.text) == "false"
-  }
+		try expect(conditions?[3].nodes.count) == 1
+		let falseNode = conditions?[3].nodes.first as? TextNode
+		try expect(falseNode?.text) == "false"
+	}
 
-  func testParseIfnot() throws {
-    let tokens: [Token] = [
-      .block(value: "ifnot value", at: .unknown),
-      .text(value: "false", at: .unknown),
-      .block(value: "else", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testParseIfnot() throws {
+		let tokens: [Token] = [
+			.block(value: "ifnot value", at: .unknown),
+			.text(value: "false", at: .unknown),
+			.block(value: "else", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
-    let node = nodes.first as? IfNode
-    let conditions = node?.conditions
-    try expect(conditions?.count) == 2
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
+		let node = nodes.first as? IfNode
+		let conditions = node?.conditions
+		try expect(conditions?.count) == 2
 
-    try expect(conditions?[0].nodes.count) == 1
-    let trueNode = conditions?[0].nodes.first as? TextNode
-    try expect(trueNode?.text) == "true"
+		try expect(conditions?[0].nodes.count) == 1
+		let trueNode = conditions?[0].nodes.first as? TextNode
+		try expect(trueNode?.text) == "true"
 
-    try expect(conditions?[1].nodes.count) == 1
-    let falseNode = conditions?[1].nodes.first as? TextNode
-    try expect(falseNode?.text) == "false"
-  }
+		try expect(conditions?[1].nodes.count) == 1
+		let falseNode = conditions?[1].nodes.first as? TextNode
+		try expect(falseNode?.text) == "false"
+	}
 
-  func testParsingErrors() {
-    it("throws an error when parsing an if block without an endif") {
-      let tokens: [Token] = [.block(value: "if value", at: .unknown)]
+	func testParsingErrors() {
+		it("throws an error when parsing an if block without an endif") {
+			let tokens: [Token] = [.block(value: "if value", at: .unknown)]
 
-      let parser = TokenParser(tokens: tokens, environment: Environment())
-      let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
-      try expect(try parser.parse()).toThrow(error)
-    }
+			let parser = TokenParser(tokens: tokens, environment: Environment())
+			let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
+			try expect(try parser.parse()).toThrow(error)
+		}
 
-    it("throws an error when parsing an ifnot without an endif") {
-      let tokens: [Token] = [.block(value: "ifnot value", at: .unknown)]
+		it("throws an error when parsing an ifnot without an endif") {
+			let tokens: [Token] = [.block(value: "ifnot value", at: .unknown)]
 
-      let parser = TokenParser(tokens: tokens, environment: Environment())
-      let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
-      try expect(try parser.parse()).toThrow(error)
-    }
-  }
+			let parser = TokenParser(tokens: tokens, environment: Environment())
+			let error = TemplateSyntaxError(reason: "`endif` was not found.", token: tokens.first)
+			try expect(try parser.parse()).toThrow(error)
+		}
+	}
 
-  func testRendering() {
-    it("renders a true expression") {
-      let node = IfNode(conditions: [
-        IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "1")]),
-        IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
-        IfCondition(expression: nil, nodes: [TextNode(text: "3")])
-      ])
+	func testRendering() {
+		it("renders a true expression") {
+			let node = IfNode(conditions: [
+				IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "1")]),
+				IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
+				IfCondition(expression: nil, nodes: [TextNode(text: "3")])
+			])
 
-      try expect(try node.render(Context())) == "1"
-    }
+			try expect(try node.render(Context())) == "1"
+		}
 
-    it("renders the first true expression") {
-      let node = IfNode(conditions: [
-        IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
-        IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
-        IfCondition(expression: nil, nodes: [TextNode(text: "3")])
-      ])
+		it("renders the first true expression") {
+			let node = IfNode(conditions: [
+				IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
+				IfCondition(expression: VariableExpression(variable: Variable("true")), nodes: [TextNode(text: "2")]),
+				IfCondition(expression: nil, nodes: [TextNode(text: "3")])
+			])
 
-      try expect(try node.render(Context())) == "2"
-    }
+			try expect(try node.render(Context())) == "2"
+		}
 
-    it("renders the empty expression when other conditions are falsy") {
-      let node = IfNode(conditions: [
-        IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
-        IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")]),
-        IfCondition(expression: nil, nodes: [TextNode(text: "3")])
-      ])
+		it("renders the empty expression when other conditions are falsy") {
+			let node = IfNode(conditions: [
+				IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
+				IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")]),
+				IfCondition(expression: nil, nodes: [TextNode(text: "3")])
+			])
 
-      try expect(try node.render(Context())) == "3"
-    }
+			try expect(try node.render(Context())) == "3"
+		}
 
-    it("renders empty when no truthy conditions") {
-      let node = IfNode(conditions: [
-        IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
-        IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")])
-      ])
+		it("renders empty when no truthy conditions") {
+			let node = IfNode(conditions: [
+				IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "1")]),
+				IfCondition(expression: VariableExpression(variable: Variable("false")), nodes: [TextNode(text: "2")])
+			])
 
-      try expect(try node.render(Context())) == ""
-    }
-  }
+			try expect(try node.render(Context())) == ""
+		}
+	}
 
-  func testSupportVariableFilters() throws {
-    let tokens: [Token] = [
-      .block(value: "if value|uppercase == \"TEST\"", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testSupportVariableFilters() throws {
+		let tokens: [Token] = [
+			.block(value: "if value|uppercase == \"TEST\"", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
 
-    let result = try renderNodes(nodes, Context(dictionary: ["value": "test"]))
-    try expect(result) == "true"
-  }
+		let result = try renderNodes(nodes, Context(dictionary: ["value": "test"]))
+		try expect(result) == "true"
+	}
 
-  func testEvaluatesNilAsFalse() throws {
-    let tokens: [Token] = [
-      .block(value: "if instance.value", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testEvaluatesNilAsFalse() throws {
+		let tokens: [Token] = [
+			.block(value: "if instance.value", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
 
-    let result = try renderNodes(nodes, Context(dictionary: ["instance": SomeType()]))
-    try expect(result) == ""
-  }
+		let result = try renderNodes(nodes, Context(dictionary: ["instance": SomeType()]))
+		try expect(result) == ""
+	}
 
-  func testSupportsRangeVariables() throws {
-    let tokens: [Token] = [
-      .block(value: "if value in 1...3", at: .unknown),
-      .text(value: "true", at: .unknown),
-      .block(value: "else", at: .unknown),
-      .text(value: "false", at: .unknown),
-      .block(value: "endif", at: .unknown)
-    ]
+	func testSupportsRangeVariables() throws {
+		let tokens: [Token] = [
+			.block(value: "if value in 1...3", at: .unknown),
+			.text(value: "true", at: .unknown),
+			.block(value: "else", at: .unknown),
+			.text(value: "false", at: .unknown),
+			.block(value: "endif", at: .unknown)
+		]
 
-    let parser = TokenParser(tokens: tokens, environment: Environment())
-    let nodes = try parser.parse()
+		let parser = TokenParser(tokens: tokens, environment: Environment())
+		let nodes = try parser.parse()
 
-    try expect(renderNodes(nodes, Context(dictionary: ["value": 3]))) == "true"
-    try expect(renderNodes(nodes, Context(dictionary: ["value": 4]))) == "false"
-  }
+		try expect(renderNodes(nodes, Context(dictionary: ["value": 3]))) == "true"
+		try expect(renderNodes(nodes, Context(dictionary: ["value": 4]))) == "false"
+	}
 }
 
 // MARK: - Helpers
 
 private struct SomeType {
-  let value: String? = nil
+	let value: String? = nil
 }

Tests/StencilTests/IncludeSpec.swift

@@ -1,78 +1,72 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class IncludeTests: XCTestCase {
-  private let path = Path(#file as String) + ".." + "fixtures"
-  private lazy var loader = FileSystemLoader(paths: [path])
-  private lazy var environment = Environment(loader: loader)
+	private let path = Path(#file as String)! / ".." / "fixtures"
+	private lazy var loader = FileSystemLoader(paths: [path])
+	private lazy var environment = Environment(loader: loader)
 
-  func testParsing() {
-    it("throws an error when no template is given") {
-      let tokens: [Token] = [ .block(value: "include", at: .unknown) ]
-      let parser = TokenParser(tokens: tokens, environment: Environment())
+	func testParsing() {
+		it("throws an error when no template is given") {
+			let tokens: [Token] = [ .block(value: "include", at: .unknown) ]
+			let parser = TokenParser(tokens: tokens, environment: Environment())
 
-      let error = TemplateSyntaxError(reason: """
-        'include' tag requires one argument, the template file to be included. \
-        A second optional argument can be used to specify the context that will \
-        be passed to the included file
-        """, token: tokens.first)
-      try expect(try parser.parse()).toThrow(error)
-    }
+			let error = TemplateSyntaxError(reason: """
+				'include' tag requires one argument, the template file to be included. \
+				A second optional argument can be used to specify the context that will \
+				be passed to the included file
+				""", token: tokens.first)
+			try expect(try parser.parse()).toThrow(error)
+		}
 
-    it("can parse a valid include block") {
-      let tokens: [Token] = [ .block(value: "include \"test.html\"", at: .unknown) ]
-      let parser = TokenParser(tokens: tokens, environment: Environment())
+		it("can parse a valid include block") {
+			let tokens: [Token] = [ .block(value: "include \"test.html\"", at: .unknown) ]
+			let parser = TokenParser(tokens: tokens, environment: Environment())
 
-      let nodes = try parser.parse()
-      let node = nodes.first as? IncludeNode
-      try expect(nodes.count) == 1
-      try expect(node?.templateName) == Variable("\"test.html\"")
-    }
-  }
+			let nodes = try parser.parse()
+			let node = nodes.first as? IncludeNode
+			try expect(nodes.count) == 1
+			try expect(node?.templateName) == Variable("\"test.html\"")
+		}
+	}
 
-  func testRendering() {
-    it("throws an error when rendering without a loader") {
-      let node = IncludeNode(templateName: Variable("\"test.html\""), token: .block(value: "", at: .unknown))
+	func testRendering() {
+		it("throws an error when rendering without a loader") {
+			let node = IncludeNode(templateName: Variable("\"test.html\""), token: .block(value: "", at: .unknown))
 
-      do {
-        _ = try node.render(Context())
-      } catch {
-        try expect("\(error)") == "Template named `test.html` does not exist. No loaders found"
-      }
-    }
+			do {
+				_ = try node.render(Context())
+			} catch {
+				try expect("\(error)") == "Template named `test.html` does not exist. No loaders found"
+			}
+		}
 
-    it("throws an error when it cannot find the included template") {
-      let node = IncludeNode(templateName: Variable("\"unknown.html\""), token: .block(value: "", at: .unknown))
+		it("throws an error when it cannot find the included template") {
+			let node = IncludeNode(templateName: Variable("\"unknown.html\""), token: .block(value: "", at: .unknown))
 
-      do {
-        _ = try node.render(Context(environment: self.environment))
-      } catch {
-        try expect("\(error)".hasPrefix("Template named `unknown.html` does not exist in loader")).to.beTrue()
-      }
-    }
+			do {
+				_ = try node.render(Context(environment: self.environment))
+			} catch {
+				try expect("\(error)".hasPrefix("Template named `unknown.html` does not exist in loader")).to.beTrue()
+			}
+		}
 
-    it("successfully renders a found included template") {
-      let node = IncludeNode(templateName: Variable("\"test.html\""), token: .block(value: "", at: .unknown))
-      let context = Context(dictionary: ["target": "World"], environment: self.environment)
-      let value = try node.render(context)
-      try expect(value) == "Hello World!"
-    }
+		it("successfully renders a found included template") {
+			let node = IncludeNode(templateName: Variable("\"test.html\""), token: .block(value: "", at: .unknown))
+			let context = Context(dictionary: ["target": "World"], environment: self.environment)
+			let value = try node.render(context)
+			try expect(value) == "Hello World!"
+		}
 
-    it("successfully passes context") {
-      let template = Template(templateString: """
-        {% include "test.html" child %}
-        """)
-      let context = Context(dictionary: ["child": ["target": "World"]], environment: self.environment)
-      let value = try template.render(context)
-      try expect(value) == "Hello World!"
-    }
-  }
+		it("successfully passes context") {
+			let template = Template(templateString: """
+				{% include "test.html" child %}
+				""")
+			let context = Context(dictionary: ["child": ["target": "World"]], environment: self.environment)
+			let value = try template.render(context)
+			try expect(value) == "Hello World!"
+		}
+	}
 }

Tests/StencilTests/InheritanceSpec.swift

@@ -1,79 +1,73 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 import Stencil
 import XCTest
 
 final class InheritanceTests: XCTestCase {
-  private let path = Path(#file as String) + ".." + "fixtures"
-  private lazy var loader = FileSystemLoader(paths: [path])
-  private lazy var environment = Environment(loader: loader)
+	private let path = Path(#file as String)! / ".." / "fixtures"
+	private lazy var loader = FileSystemLoader(paths: [path])
+	private lazy var environment = Environment(loader: loader)
 
-  func testInheritance() {
-    it("can inherit from another template") {
-      let template = try self.environment.loadTemplate(name: "child.html")
-      try expect(try template.render()) == """
-        Super_Header Child_Header
-        Child_Body
-        """
-    }
+	func testInheritance() {
+		it("can inherit from another template") {
+			let template = try self.environment.loadTemplate(name: "child.html")
+			try expect(try template.render()) == """
+				Super_Header Child_Header
+				Child_Body
+				"""
+		}
 
-    it("can inherit from another template inheriting from another template") {
-      let template = try self.environment.loadTemplate(name: "child-child.html")
-      try expect(try template.render()) == """
-        Super_Header Child_Header Child_Child_Header
-        Child_Body
-        """
-    }
+		it("can inherit from another template inheriting from another template") {
+			let template = try self.environment.loadTemplate(name: "child-child.html")
+			try expect(try template.render()) == """
+				Super_Header Child_Header Child_Child_Header
+				Child_Body
+				"""
+		}
 
-    it("can inherit from a template that calls a super block") {
-      let template = try self.environment.loadTemplate(name: "child-super.html")
-      try expect(try template.render()) == """
-        Header
-        Child_Body
-        """
-    }
+		it("can inherit from a template that calls a super block") {
+			let template = try self.environment.loadTemplate(name: "child-super.html")
+			try expect(try template.render()) == """
+				Header
+				Child_Body
+				"""
+		}
 
-    it("can render block.super in if tag") {
-      let template = try self.environment.loadTemplate(name: "if-block-child.html")
+		it("can render block.super in if tag") {
+			let template = try self.environment.loadTemplate(name: "if-block-child.html")
 
-      try expect(try template.render(["sort": "new"])) == """
-      Title - Nieuwste spellen
+			try expect(try template.render(["sort": "new"])) == """
+			Title - Nieuwste spellen
 
-      """
+			"""
 
-      try expect(try template.render(["sort": "upcoming"])) == """
-      Title - Binnenkort op de agenda
+			try expect(try template.render(["sort": "upcoming"])) == """
+			Title - Binnenkort op de agenda
 
-      """
+			"""
 
-      try expect(try template.render(["sort": "near-me"])) == """
-      Title - In mijn buurt
+			try expect(try template.render(["sort": "near-me"])) == """
+			Title - In mijn buurt
 
-      """
-    }
-  }
+			"""
+		}
+	}
 
-  func testInheritanceCache() {
-    it("can call block twice") {
-      let template: Template = "{% block repeat %}Block{% endblock %}{{ block.repeat }}"
-      try expect(try template.render()) == "BlockBlock"
-    }
+	func testInheritanceCache() {
+		it("can call block twice") {
+			let template: Template = "{% block repeat %}Block{% endblock %}{{ block.repeat }}"
+			try expect(try template.render()) == "BlockBlock"
+		}
 
-    it("renders child content when calling block twice in base template") {
-      let template = try self.environment.loadTemplate(name: "child-repeat.html")
-      try expect(try template.render()) == """
-      Super_Header Child_Header
-      Child_Body
-      Repeat
-      Super_Header Child_Header
-      Child_Body
-      """
-    }
-  }
+		it("renders child content when calling block twice in base template") {
+			let template = try self.environment.loadTemplate(name: "child-repeat.html")
+			try expect(try template.render()) == """
+			Super_Header Child_Header
+			Child_Body
+			Repeat
+			Super_Header Child_Header
+			Child_Body
+			"""
+		}
+	}
 }

Tests/StencilTests/LexerSpec.swift

@@ -1,95 +1,105 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class LexerTests: XCTestCase {
-  func testText() throws {
-    let lexer = Lexer(templateString: "Hello World")
-    let tokens = lexer.tokenize()
+	func testText() throws {
+		let lexer = Lexer(templateString: "Hello World")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 1
-    try expect(tokens.first) == .text(value: "Hello World", at: makeSourceMap("Hello World", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .text(value: "Hello World", at: makeSourceMap("Hello World", for: lexer))
+	}
 
-  func testComment() throws {
-    let lexer = Lexer(templateString: "{# Comment #}")
-    let tokens = lexer.tokenize()
+	func testComment() throws {
+		let lexer = Lexer(templateString: "{# Comment #}")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 1
-    try expect(tokens.first) == .comment(value: "Comment", at: makeSourceMap("Comment", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .comment(value: "Comment", at: makeSourceMap("Comment", for: lexer))
+	}
 
-  func testVariable() throws {
-    let lexer = Lexer(templateString: "{{ Variable }}")
-    let tokens = lexer.tokenize()
+	func testEscapedVariableToken() throws {
+		let lexer = Lexer(templateString: "\\{{ Variable }}")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 1
-    try expect(tokens.first) == .variable(value: "Variable", at: makeSourceMap("Variable", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .text(value: "{{ Variable }}", at: makeSourceMap("{{ Variable }}", for: lexer))
+	}
 
-  func testTokenWithoutSpaces() throws {
-    let lexer = Lexer(templateString: "{{Variable}}")
-    let tokens = lexer.tokenize()
+	func testEscapedBehaviourToken() throws {
+		let lexer = Lexer(templateString: "\\{% Variable %}")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 1
-    try expect(tokens.first) == .variable(value: "Variable", at: makeSourceMap("Variable", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .text(value: "{% Variable %}", at: makeSourceMap("{% Variable %}", for: lexer))
+	}
 
-  func testUnclosedTag() throws {
-    let templateString = "{{ thing"
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+	func testVariable() throws {
+		let lexer = Lexer(templateString: "{{ Variable }}")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 1
-    try expect(tokens.first) == .text(value: "", at: makeSourceMap("{{ thing", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .variable(value: "Variable", at: makeSourceMap("Variable", for: lexer))
+	}
 
-  func testContentMixture() throws {
-    let templateString = "My name is {{ myname }}."
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+	func testTokenWithoutSpaces() throws {
+		let lexer = Lexer(templateString: "{{Variable}}")
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 3
-    try expect(tokens[0]) == .text(value: "My name is ", at: makeSourceMap("My name is ", for: lexer))
-    try expect(tokens[1]) == .variable(value: "myname", at: makeSourceMap("myname", for: lexer))
-    try expect(tokens[2]) == .text(value: ".", at: makeSourceMap(".", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .variable(value: "Variable", at: makeSourceMap("Variable", for: lexer))
+	}
 
-  func testVariablesWithoutBeingGreedy() throws {
-    let templateString = "{{ thing }}{{ name }}"
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+	func testUnclosedTag() throws {
+		let templateString = "{{ thing"
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 2
-    try expect(tokens[0]) == .variable(value: "thing", at: makeSourceMap("thing", for: lexer))
-    try expect(tokens[1]) == .variable(value: "name", at: makeSourceMap("name", for: lexer))
-  }
+		try expect(tokens.count) == 1
+		try expect(tokens.first) == .text(value: "", at: makeSourceMap("{{ thing", for: lexer))
+	}
 
-  func testUnclosedBlock() throws {
-    let lexer = Lexer(templateString: "{%}")
-    _ = lexer.tokenize()
-  }
+	func testContentMixture() throws {
+		let templateString = "My name is {{ myname }}."
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-  func testTokenizeIncorrectSyntaxWithoutCrashing() throws {
-    let lexer = Lexer(templateString: "func some() {{% if %}")
-    _ = lexer.tokenize()
-  }
+		try expect(tokens.count) == 3
+		try expect(tokens[0]) == .text(value: "My name is ", at: makeSourceMap("My name is ", for: lexer))
+		try expect(tokens[1]) == .variable(value: "myname", at: makeSourceMap("myname", for: lexer))
+		try expect(tokens[2]) == .text(value: ".", at: makeSourceMap(".", for: lexer))
+	}
 
-  func testEmptyVariable() throws {
-    let lexer = Lexer(templateString: "{{}}")
-    _ = lexer.tokenize()
-  }
+	func testVariablesWithoutBeingGreedy() throws {
+		let templateString = "{{ thing }}{{ name }}"
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-  func testNewlines() throws {
-    // swiftlint:disable indentation_width
-    let templateString = """
+		try expect(tokens.count) == 2
+		try expect(tokens[0]) == .variable(value: "thing", at: makeSourceMap("thing", for: lexer))
+		try expect(tokens[1]) == .variable(value: "name", at: makeSourceMap("name", for: lexer))
+	}
+
+	func testUnclosedBlock() throws {
+		let lexer = Lexer(templateString: "{%}")
+		_ = lexer.tokenize()
+	}
+
+	func testTokenizeIncorrectSyntaxWithoutCrashing() throws {
+		let lexer = Lexer(templateString: "func some() {{% if %}")
+		_ = lexer.tokenize()
+	}
+
+	func testEmptyVariable() throws {
+		let lexer = Lexer(templateString: "{{}}")
+		_ = lexer.tokenize()
+	}
+
+	func testNewlines() throws {
+		// swiftlint:disable indentation_width
+		let templateString = """
       My name is {%
           if name
            and
@@ -99,69 +109,69 @@ final class LexerTests: XCTestCase {
       }}{%
       endif %}.
       """
-    // swiftlint:enable indentation_width
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+		// swiftlint:enable indentation_width
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 5
-    try expect(tokens[0]) == .text(value: "My name is ", at: makeSourceMap("My name is", for: lexer))
-    try expect(tokens[1]) == .block(value: "if name and name", at: makeSourceMap("{%", for: lexer))
-    try expect(tokens[2]) == .variable(value: "name", at: makeSourceMap("name", for: lexer, options: .backwards))
-    try expect(tokens[3]) == .block(value: "endif", at: makeSourceMap("endif", for: lexer))
-    try expect(tokens[4]) == .text(value: ".", at: makeSourceMap(".", for: lexer))
-  }
+		try expect(tokens.count) == 5
+		try expect(tokens[0]) == .text(value: "My name is ", at: makeSourceMap("My name is", for: lexer))
+		try expect(tokens[1]) == .block(value: "if name and name", at: makeSourceMap("{%", for: lexer))
+		try expect(tokens[2]) == .variable(value: "name", at: makeSourceMap("name", for: lexer, options: .backwards))
+		try expect(tokens[3]) == .block(value: "endif", at: makeSourceMap("endif", for: lexer))
+		try expect(tokens[4]) == .text(value: ".", at: makeSourceMap(".", for: lexer))
+	}
 
-  func testTrimSymbols() throws {
-    let fBlock = "if hello"
-    let sBlock = "ta da"
-    let lexer = Lexer(templateString: "{%+ \(fBlock) -%}{% \(sBlock) -%}")
-    let tokens = lexer.tokenize()
-    let behaviours = (
-      WhitespaceBehaviour(leading: .keep, trailing: .trim),
-      WhitespaceBehaviour(leading: .unspecified, trailing: .trim)
-    )
+	func testTrimSymbols() throws {
+		let fBlock = "if hello"
+		let sBlock = "ta da"
+		let lexer = Lexer(templateString: "{%+ \(fBlock) -%}{% \(sBlock) -%}")
+		let tokens = lexer.tokenize()
+		let behaviours = (
+			WhitespaceBehaviour(leading: .keep, trailing: .trim),
+			WhitespaceBehaviour(leading: .unspecified, trailing: .trim)
+		)
 
-    try expect(tokens.count) == 2
-    try expect(tokens[0]) == .block(value: fBlock, at: makeSourceMap(fBlock, for: lexer), whitespace: behaviours.0)
-    try expect(tokens[1]) == .block(value: sBlock, at: makeSourceMap(sBlock, for: lexer), whitespace: behaviours.1)
-  }
+		try expect(tokens.count) == 2
+		try expect(tokens[0]) == .block(value: fBlock, at: makeSourceMap(fBlock, for: lexer), whitespace: behaviours.0)
+		try expect(tokens[1]) == .block(value: sBlock, at: makeSourceMap(sBlock, for: lexer), whitespace: behaviours.1)
+	}
 
-  func testEscapeSequence() throws {
-    let templateString = "class Some {{ '{' }}{% if true %}{{ stuff }}{% endif %}"
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+	func testEscapeSequence() throws {
+		let templateString = "class Some {{ '{' }}{% if true %}{{ stuff }}{% endif %}"
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 5
-    try expect(tokens[0]) == .text(value: "class Some ", at: makeSourceMap("class Some ", for: lexer))
-    try expect(tokens[1]) == .variable(value: "'{'", at: makeSourceMap("'{'", for: lexer))
-    try expect(tokens[2]) == .block(value: "if true", at: makeSourceMap("if true", for: lexer))
-    try expect(tokens[3]) == .variable(value: "stuff", at: makeSourceMap("stuff", for: lexer))
-    try expect(tokens[4]) == .block(value: "endif", at: makeSourceMap("endif", for: lexer))
-  }
+		try expect(tokens.count) == 5
+		try expect(tokens[0]) == .text(value: "class Some ", at: makeSourceMap("class Some ", for: lexer))
+		try expect(tokens[1]) == .variable(value: "'{'", at: makeSourceMap("'{'", for: lexer))
+		try expect(tokens[2]) == .block(value: "if true", at: makeSourceMap("if true", for: lexer))
+		try expect(tokens[3]) == .variable(value: "stuff", at: makeSourceMap("stuff", for: lexer))
+		try expect(tokens[4]) == .block(value: "endif", at: makeSourceMap("endif", for: lexer))
+	}
 
-  func testPerformance() throws {
-    let path = Path(#file as String) + ".." + "fixtures" + "huge.html"
-    let content: String = try path.read()
+	func testPerformance() throws {
+		let path = Path(#file as String)! / ".." / "fixtures" / "huge.html"
+		let content: String = try NSString(contentsOfFile: path.string, encoding: String.Encoding.utf8.rawValue).substring(from: 0) as String
 
-    measure {
-      let lexer = Lexer(templateString: content)
-      _ = lexer.tokenize()
-    }
-  }
+		measure {
+			let lexer = Lexer(templateString: content)
+			_ = lexer.tokenize()
+		}
+	}
 
-  func testCombiningDiaeresis() throws {
-    // the symbol "ü" in the `templateString` is unusually encoded as 0x75 0xCC 0x88 (LATIN SMALL LETTER U + COMBINING
-    // DIAERESIS) instead of 0xC3 0xBC (LATIN SMALL LETTER U WITH DIAERESIS)
-    let templateString = "ü\n{% if test %}ü{% endif %}\n{% if ü %}ü{% endif %}\n"
-    let lexer = Lexer(templateString: templateString)
-    let tokens = lexer.tokenize()
+	func testCombiningDiaeresis() throws {
+		// the symbol "ü" in the `templateString` is unusually encoded as 0x75 0xCC 0x88 (LATIN SMALL LETTER U + COMBINING
+		// DIAERESIS) instead of 0xC3 0xBC (LATIN SMALL LETTER U WITH DIAERESIS)
+		let templateString = "ü\n{% if test %}ü{% endif %}\n{% if ü %}ü{% endif %}\n"
+		let lexer = Lexer(templateString: templateString)
+		let tokens = lexer.tokenize()
 
-    try expect(tokens.count) == 9
-    assert(tokens[1].contents == "if test")
-  }
+		try expect(tokens.count) == 9
+		assert(tokens[1].contents == "if test")
+	}
 
-  private func makeSourceMap(_ token: String, for lexer: Lexer, options: String.CompareOptions = []) -> SourceMap {
-    guard let range = lexer.templateString.range(of: token, options: options) else { fatalError("Token not found") }
-    return SourceMap(location: lexer.rangeLocation(range))
-  }
+	private func makeSourceMap(_ token: String, for lexer: Lexer, options: String.CompareOptions = []) -> SourceMap {
+		guard let range = lexer.templateString.range(of: token, options: options) else { fatalError("Token not found") }
+		return SourceMap(location: lexer.rangeLocation(range))
+	}
 }

Tests/StencilTests/LoaderSpec.swift

@@ -1,61 +1,55 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import PathKit
 import Spectre
 import Stencil
 import XCTest
 
 final class TemplateLoaderTests: XCTestCase {
-  func testFileSystemLoader() {
-    let path = Path(#file as String) + ".." + "fixtures"
-    let loader = FileSystemLoader(paths: [path])
-    let environment = Environment(loader: loader)
+	func testFileSystemLoader() {
+		let path = Path(#file as String)! / ".." / "fixtures"
+		let loader = FileSystemLoader(paths: [path])
+		let environment = Environment(loader: loader)
 
-    it("errors when a template cannot be found") {
-      try expect(try environment.loadTemplate(name: "unknown.html")).toThrow()
-    }
+		it("errors when a template cannot be found") {
+			try expect(try environment.loadTemplate(name: "unknown.html")).toThrow()
+		}
 
-    it("errors when an array of templates cannot be found") {
-      try expect(try environment.loadTemplate(names: ["unknown.html", "unknown2.html"])).toThrow()
-    }
+		it("errors when an array of templates cannot be found") {
+			try expect(try environment.loadTemplate(names: ["unknown.html", "unknown2.html"])).toThrow()
+		}
 
-    it("can load a template from a file") {
-      _ = try environment.loadTemplate(name: "test.html")
-    }
+		it("can load a template from a file") {
+			_ = try environment.loadTemplate(name: "test.html")
+		}
 
-    it("errors when loading absolute file outside of the selected path") {
-      try expect(try environment.loadTemplate(name: "/etc/hosts")).toThrow()
-    }
+		it("errors when loading absolute file outside of the selected path") {
+			try expect(try environment.loadTemplate(name: "/etc/hosts")).toThrow()
+		}
 
-    it("errors when loading relative file outside of the selected path") {
-      try expect(try environment.loadTemplate(name: "../LoaderSpec.swift")).toThrow()
-    }
-  }
+		it("errors when loading relative file outside of the selected path") {
+			try expect(try environment.loadTemplate(name: "../LoaderSpec.swift")).toThrow()
+		}
+	}
 
-  func testDictionaryLoader() {
-    let loader = DictionaryLoader(templates: [
-      "index.html": "Hello World"
-    ])
-    let environment = Environment(loader: loader)
+	func testDictionaryLoader() {
+		let loader = DictionaryLoader(templates: [
+			"index.html": "Hello World"
+		])
+		let environment = Environment(loader: loader)
 
-    it("errors when a template cannot be found") {
-      try expect(try environment.loadTemplate(name: "unknown.html")).toThrow()
-    }
+		it("errors when a template cannot be found") {
+			try expect(try environment.loadTemplate(name: "unknown.html")).toThrow()
+		}
 
-    it("errors when an array of templates cannot be found") {
-      try expect(try environment.loadTemplate(names: ["unknown.html", "unknown2.html"])).toThrow()
-    }
+		it("errors when an array of templates cannot be found") {
+			try expect(try environment.loadTemplate(names: ["unknown.html", "unknown2.html"])).toThrow()
+		}
 
-    it("can load a template from a known templates") {
-      _ = try environment.loadTemplate(name: "index.html")
-    }
+		it("can load a template from a known templates") {
+			_ = try environment.loadTemplate(name: "index.html")
+		}
 
-    it("can load a known template from a collection of templates") {
-      _ = try environment.loadTemplate(names: ["unknown.html", "index.html"])
-    }
-  }
+		it("can load a known template from a collection of templates") {
+			_ = try environment.loadTemplate(names: ["unknown.html", "index.html"])
+		}
+	}
 }

Tests/StencilTests/NodeSpec.swift

@@ -1,117 +1,111 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class NodeTests: XCTestCase {
-  private let context = Context(dictionary: [
-    "name": "Kyle",
-    "age": 27,
-    "items": [1, 2, 3]
-  ])
+	private let context = Context(dictionary: [
+		"name": "Kyle",
+		"age": 27,
+		"items": [1, 2, 3]
+	])
 
-  func testTextNode() {
-    it("renders the given text") {
-      let node = TextNode(text: "Hello World")
-      try expect(try node.render(self.context)) == "Hello World"
-    }
-    it("Trims leading whitespace") {
-      let text = "      \n Some text     "
-      let trimBehaviour = TrimBehaviour(leading: .whitespace, trailing: .nothing)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "\n Some text     "
-    }
-    it("Trims leading whitespace and one newline") {
-      let text = "\n\n Some text     "
-      let trimBehaviour = TrimBehaviour(leading: .whitespaceAndOneNewLine, trailing: .nothing)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "\n Some text     "
-    }
-    it("Trims leading whitespace and one newline") {
-      let text = "\n\n Some text     "
-      let trimBehaviour = TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .nothing)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "Some text     "
-    }
-    it("Trims trailing whitespace") {
-      let text = "      Some text     \n"
-      let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespace)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "      Some text\n"
-    }
-    it("Trims trailing whitespace and one newline") {
-      let text = "      Some text     \n \n "
-      let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespaceAndOneNewLine)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "      Some text     \n "
-    }
-    it("Trims trailing whitespace and newlines") {
-      let text = "      Some text     \n \n "
-      let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespaceAndNewLines)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "      Some text"
-    }
-    it("Trims all whitespace") {
-      let text = "    \n  \nSome text \n    "
-      let trimBehaviour = TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .whitespaceAndNewLines)
-      let node = TextNode(text: text, trimBehaviour: trimBehaviour)
-      try expect(try node.render(self.context)) == "Some text"
-    }
-  }
+	func testTextNode() {
+		it("renders the given text") {
+			let node = TextNode(text: "Hello World")
+			try expect(try node.render(self.context)) == "Hello World"
+		}
+		it("Trims leading whitespace") {
+			let text = "      \n Some text     "
+			let trimBehaviour = TrimBehaviour(leading: .whitespace, trailing: .nothing)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "\n Some text     "
+		}
+		it("Trims leading whitespace and one newline") {
+			let text = "\n\n Some text     "
+			let trimBehaviour = TrimBehaviour(leading: .whitespaceAndOneNewLine, trailing: .nothing)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "\n Some text     "
+		}
+		it("Trims leading whitespace and one newline") {
+			let text = "\n\n Some text     "
+			let trimBehaviour = TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .nothing)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "Some text     "
+		}
+		it("Trims trailing whitespace") {
+			let text = "      Some text     \n"
+			let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespace)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "      Some text\n"
+		}
+		it("Trims trailing whitespace and one newline") {
+			let text = "      Some text     \n \n "
+			let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespaceAndOneNewLine)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "      Some text     \n "
+		}
+		it("Trims trailing whitespace and newlines") {
+			let text = "      Some text     \n \n "
+			let trimBehaviour = TrimBehaviour(leading: .nothing, trailing: .whitespaceAndNewLines)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "      Some text"
+		}
+		it("Trims all whitespace") {
+			let text = "    \n  \nSome text \n    "
+			let trimBehaviour = TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .whitespaceAndNewLines)
+			let node = TextNode(text: text, trimBehaviour: trimBehaviour)
+			try expect(try node.render(self.context)) == "Some text"
+		}
+	}
 
-  func testVariableNode() {
-    it("resolves and renders the variable") {
-      let node = VariableNode(variable: Variable("name"))
-      try expect(try node.render(self.context)) == "Kyle"
-    }
+	func testVariableNode() {
+		it("resolves and renders the variable") {
+			let node = VariableNode(variable: Variable("name"))
+			try expect(try node.render(self.context)) == "Kyle"
+		}
 
-    it("resolves and renders a non string variable") {
-      let node = VariableNode(variable: Variable("age"))
-      try expect(try node.render(self.context)) == "27"
-    }
-  }
+		it("resolves and renders a non string variable") {
+			let node = VariableNode(variable: Variable("age"))
+			try expect(try node.render(self.context)) == "27"
+		}
+	}
 
-  func testRendering() {
-    it("renders the nodes") {
-      let nodes: [NodeType] = [
-        TextNode(text: "Hello "),
-        VariableNode(variable: "name")
-      ]
+	func testRendering() {
+		it("renders the nodes") {
+			let nodes: [NodeType] = [
+				TextNode(text: "Hello "),
+				VariableNode(variable: "name")
+			]
 
-      try expect(try renderNodes(nodes, self.context)) == "Hello Kyle"
-    }
+			try expect(try renderNodes(nodes, self.context)) == "Hello Kyle"
+		}
 
-    it("correctly throws a nodes failure") {
-      let nodes: [NodeType] = [
-        TextNode(text: "Hello "),
-        VariableNode(variable: "name"),
-        ErrorNode()
-      ]
+		it("correctly throws a nodes failure") {
+			let nodes: [NodeType] = [
+				TextNode(text: "Hello "),
+				VariableNode(variable: "name"),
+				ErrorNode()
+			]
 
-      try expect(try renderNodes(nodes, self.context)).toThrow(TemplateSyntaxError("Custom Error"))
-    }
-  }
+			try expect(try renderNodes(nodes, self.context)).toThrow(TemplateSyntaxError("Custom Error"))
+		}
+	}
 
-  func testRenderingBooleans() {
-    it("can render true & false") {
-      try expect(Template(templateString: "{{ true }}").render()) == "true"
-      try expect(Template(templateString: "{{ false }}").render()) == "false"
-    }
+	func testRenderingBooleans() {
+		it("can render true & false") {
+			try expect(Template(templateString: "{{ true }}").render()) == "true"
+			try expect(Template(templateString: "{{ false }}").render()) == "false"
+		}
 
-    it("can resolve variable") {
-      let template = Template(templateString: "{{ value == \"known\" }}")
-      try expect(template.render(["value": "known"])) == "true"
-      try expect(template.render(["value": "unknown"])) == "false"
-    }
+		it("can resolve variable") {
+			let template = Template(templateString: "{{ value == \"known\" }}")
+			try expect(template.render(["value": "known"])) == "true"
+			try expect(template.render(["value": "unknown"])) == "false"
+		}
 
-    it("can render a boolean expression") {
-      try expect(Template(templateString: "{{ 1 > 0 }}").render()) == "true"
-      try expect(Template(templateString: "{{ 1 == 2 }}").render()) == "false"
-    }
-  }
+		it("can render a boolean expression") {
+			try expect(Template(templateString: "{{ 1 > 0 }}").render()) == "true"
+			try expect(Template(templateString: "{{ 1 == 2 }}").render()) == "false"
+		}
+	}
 }

Tests/StencilTests/NowNodeSpec.swift

@@ -1,56 +1,50 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class NowNodeTests: XCTestCase {
-  func testParsing() {
-    it("parses default format without any now arguments") {
-      #if os(Linux)
-      throw skip()
-      #else
-      let tokens: [Token] = [ .block(value: "now", at: .unknown) ]
-      let parser = TokenParser(tokens: tokens, environment: Environment())
+	func testParsing() {
+		it("parses default format without any now arguments") {
+			#if os(Linux)
+			throw skip()
+			#else
+			let tokens: [Token] = [ .block(value: "now", at: .unknown) ]
+			let parser = TokenParser(tokens: tokens, environment: Environment())
 
-      let nodes = try parser.parse()
-      let node = nodes.first as? NowNode
-      try expect(nodes.count) == 1
-      try expect(node?.format.variable) == "\"yyyy-MM-dd 'at' HH:mm\""
-      #endif
-    }
+			let nodes = try parser.parse()
+			let node = nodes.first as? NowNode
+			try expect(nodes.count) == 1
+			try expect(node?.format.variable) == "\"yyyy-MM-dd 'at' HH:mm\""
+			#endif
+		}
 
-    it("parses now with a format") {
-      #if os(Linux)
-      throw skip()
-      #else
-      let tokens: [Token] = [ .block(value: "now \"HH:mm\"", at: .unknown) ]
-      let parser = TokenParser(tokens: tokens, environment: Environment())
-      let nodes = try parser.parse()
-      let node = nodes.first as? NowNode
-      try expect(nodes.count) == 1
-      try expect(node?.format.variable) == "\"HH:mm\""
-      #endif
-    }
-  }
+		it("parses now with a format") {
+			#if os(Linux)
+			throw skip()
+			#else
+			let tokens: [Token] = [ .block(value: "now \"HH:mm\"", at: .unknown) ]
+			let parser = TokenParser(tokens: tokens, environment: Environment())
+			let nodes = try parser.parse()
+			let node = nodes.first as? NowNode
+			try expect(nodes.count) == 1
+			try expect(node?.format.variable) == "\"HH:mm\""
+			#endif
+		}
+	}
 
-  func testRendering() {
-    it("renders the date") {
-      #if os(Linux)
-      throw skip()
-      #else
-      let node = NowNode(format: Variable("\"yyyy-MM-dd\""))
+	func testRendering() {
+		it("renders the date") {
+			#if os(Linux)
+			throw skip()
+			#else
+			let node = NowNode(format: Variable("\"yyyy-MM-dd\""))
 
-      let formatter = DateFormatter()
-      formatter.dateFormat = "yyyy-MM-dd"
-      let date = formatter.string(from: Date())
+			let formatter = DateFormatter()
+			formatter.dateFormat = "yyyy-MM-dd"
+			let date = formatter.string(from: Date())
 
-      try expect(try node.render(Context())) == date
-      #endif
-    }
-  }
+			try expect(try node.render(Context())) == date
+			#endif
+		}
+	}
 }

Tests/StencilTests/ParserSpec.swift

@@ -1,85 +1,79 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class TokenParserTests: XCTestCase {
-  func testTextToken() throws {
-    let parser = TokenParser(tokens: [
-      .text(value: "Hello World", at: .unknown)
-    ], environment: Environment())
+	func testTextToken() throws {
+		let parser = TokenParser(tokens: [
+			.text(value: "Hello World", at: .unknown)
+		], environment: Environment())
 
-    let nodes = try parser.parse()
-    let node = nodes.first as? TextNode
+		let nodes = try parser.parse()
+		let node = nodes.first as? TextNode
 
-    try expect(nodes.count) == 1
-    try expect(node?.text) == "Hello World"
-  }
+		try expect(nodes.count) == 1
+		try expect(node?.text) == "Hello World"
+	}
 
-  func testVariableToken() throws {
-    let parser = TokenParser(tokens: [
-      .variable(value: "'name'", at: .unknown)
-    ], environment: Environment())
+	func testVariableToken() throws {
+		let parser = TokenParser(tokens: [
+			.variable(value: "'name'", at: .unknown)
+		], environment: Environment())
 
-    let nodes = try parser.parse()
-    let node = nodes.first as? VariableNode
-    try expect(nodes.count) == 1
-    let result = try node?.render(Context())
-    try expect(result) == "name"
-  }
+		let nodes = try parser.parse()
+		let node = nodes.first as? VariableNode
+		try expect(nodes.count) == 1
+		let result = try node?.render(Context())
+		try expect(result) == "name"
+	}
 
-  func testCommentToken() throws {
-    let parser = TokenParser(tokens: [
-      .comment(value: "Secret stuff!", at: .unknown)
-    ], environment: Environment())
+	func testCommentToken() throws {
+		let parser = TokenParser(tokens: [
+			.comment(value: "Secret stuff!", at: .unknown)
+		], environment: Environment())
 
-    let nodes = try parser.parse()
-    try expect(nodes.count) == 0
-  }
+		let nodes = try parser.parse()
+		try expect(nodes.count) == 0
+	}
 
-  func testTagToken() throws {
-    let simpleExtension = Extension()
-    simpleExtension.registerSimpleTag("known") { _ in
-      ""
-    }
+	func testTagToken() throws {
+		let simpleExtension = Extension()
+		simpleExtension.registerSimpleTag("known") { _ in
+			""
+		}
 
-    let parser = TokenParser(tokens: [
-      .block(value: "known", at: .unknown)
-    ], environment: Environment(extensions: [simpleExtension]))
+		let parser = TokenParser(tokens: [
+			.block(value: "known", at: .unknown)
+		], environment: Environment(extensions: [simpleExtension]))
 
-    let nodes = try parser.parse()
-    try expect(nodes.count) == 1
-  }
+		let nodes = try parser.parse()
+		try expect(nodes.count) == 1
+	}
 
-  func testErrorUnknownTag() throws {
-    let tokens: [Token] = [.block(value: "unknown", at: .unknown)]
-    let parser = TokenParser(tokens: tokens, environment: Environment())
+	func testErrorUnknownTag() throws {
+		let tokens: [Token] = [.block(value: "unknown", at: .unknown)]
+		let parser = TokenParser(tokens: tokens, environment: Environment())
 
-    try expect(try parser.parse()).toThrow(TemplateSyntaxError(
-      reason: "Unknown template tag 'unknown'",
-      token: tokens.first
-    ))
-  }
+		try expect(try parser.parse()).toThrow(TemplateSyntaxError(
+			reason: "Unknown template tag 'unknown'",
+			token: tokens.first
+		))
+	}
 
-  func testTransformWhitespaceBehaviourToTrimBehaviour() throws {
-    let simpleExtension = Extension()
-    simpleExtension.registerSimpleTag("known") { _ in "" }
+	func testTransformWhitespaceBehaviourToTrimBehaviour() throws {
+		let simpleExtension = Extension()
+		simpleExtension.registerSimpleTag("known") { _ in "" }
 
-    let parser = TokenParser(tokens: [
-      .block(value: "known", at: .unknown, whitespace: WhitespaceBehaviour(leading: .unspecified, trailing: .trim)),
-      .text(value: "      \nSome text     ", at: .unknown),
-      .block(value: "known", at: .unknown, whitespace: WhitespaceBehaviour(leading: .keep, trailing: .trim))
-    ], environment: Environment(extensions: [simpleExtension]))
+		let parser = TokenParser(tokens: [
+			.block(value: "known", at: .unknown, whitespace: WhitespaceBehaviour(leading: .unspecified, trailing: .trim)),
+			.text(value: "      \nSome text     ", at: .unknown),
+			.block(value: "known", at: .unknown, whitespace: WhitespaceBehaviour(leading: .keep, trailing: .trim))
+		], environment: Environment(extensions: [simpleExtension]))
 
-    let nodes = try parser.parse()
-    try expect(nodes.count) == 3
-    let textNode = nodes[1] as? TextNode
-    try expect(textNode?.text) == "      \nSome text     "
-    try expect(textNode?.trimBehaviour) == TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .nothing)
-  }
+		let nodes = try parser.parse()
+		try expect(nodes.count) == 3
+		let textNode = nodes[1] as? TextNode
+		try expect(textNode?.text) == "      \nSome text     "
+		try expect(textNode?.trimBehaviour) == TrimBehaviour(leading: .whitespaceAndNewLines, trailing: .nothing)
+	}
 }

Tests/StencilTests/StencilSpec.swift

@@ -1,76 +1,70 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 import Stencil
 import XCTest
 
 final class StencilTests: XCTestCase {
-  private lazy var environment: Environment = {
-    let exampleExtension = Extension()
-    exampleExtension.registerSimpleTag("simpletag") { _ in
-      "Hello World"
-    }
-    exampleExtension.registerTag("customtag") { _, token in
-      CustomNode(token: token)
-    }
-    return Environment(extensions: [exampleExtension])
-  }()
+	private lazy var environment: Environment = {
+		let exampleExtension = Extension()
+		exampleExtension.registerSimpleTag("simpletag") { _ in
+			"Hello World"
+		}
+		exampleExtension.registerTag("customtag") { _, token in
+			CustomNode(token: token)
+		}
+		return Environment(extensions: [exampleExtension])
+	}()
 
-  func testStencil() {
-    it("can render the README example") {
-      let templateString = """
-        There are {{ articles.count }} articles.
+	func testStencil() {
+		it("can render the README example") {
+			let templateString = """
+				There are {{ articles.count }} articles.
 
-        {% for article in articles %}\
-          - {{ article.title }} by {{ article.author }}.
-        {% endfor %}
-        """
+				{% for article in articles %}\
+					- {{ article.title }} by {{ article.author }}.
+				{% endfor %}
+				"""
 
-      let context = [
-        "articles": [
-          Article(title: "Migrating from OCUnit to XCTest", author: "Kyle Fuller"),
-          Article(title: "Memory Management with ARC", author: "Kyle Fuller")
-        ]
-      ]
+			let context = [
+				"articles": [
+					Article(title: "Migrating from OCUnit to XCTest", author: "Kyle Fuller"),
+					Article(title: "Memory Management with ARC", author: "Kyle Fuller")
+				]
+			]
 
-      let template = Template(templateString: templateString)
-      let result = try template.render(context)
+			let template = Template(templateString: templateString)
+			let result = try template.render(context)
 
-      try expect(result) == """
-        There are 2 articles.
+			try expect(result) == """
+				There are 2 articles.
 
-          - Migrating from OCUnit to XCTest by Kyle Fuller.
-          - Memory Management with ARC by Kyle Fuller.
+					- Migrating from OCUnit to XCTest by Kyle Fuller.
+					- Memory Management with ARC by Kyle Fuller.
 
-        """
-    }
+				"""
+		}
 
-    it("can render a custom template tag") {
-      let result = try self.environment.renderTemplate(string: "{% customtag %}")
-      try expect(result) == "Hello World"
-    }
+		it("can render a custom template tag") {
+			let result = try self.environment.renderTemplate(string: "{% customtag %}")
+			try expect(result) == "Hello World"
+		}
 
-    it("can render a simple custom tag") {
-      let result = try self.environment.renderTemplate(string: "{% simpletag %}")
-      try expect(result) == "Hello World"
-    }
-  }
+		it("can render a simple custom tag") {
+			let result = try self.environment.renderTemplate(string: "{% simpletag %}")
+			try expect(result) == "Hello World"
+		}
+	}
 }
 
 // MARK: - Helpers
 
 private struct CustomNode: NodeType {
-  let token: Token?
-  func render(_ context: Context) throws -> String {
-    "Hello World"
-  }
+	let token: Token?
+	func render(_ context: Context) throws -> String {
+		"Hello World"
+	}
 }
 
 private struct Article {
-  let title: String
-  let author: String
+	let title: String
+	let author: String
 }

Tests/StencilTests/TemplateSpec.swift

@@ -1,25 +1,25 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class TemplateTests: XCTestCase {
-  func testTemplate() {
-    it("can render a template from a string") {
-      let template = Template(templateString: "Hello World")
-      let result = try template.render([ "name": "Kyle" ])
-      try expect(result) == "Hello World"
-    }
+	func testTemplate() {
+		it("can render a template from a string") {
+			let template = Template(templateString: "Hello World")
+			let result = try template.render([ "name": "Kyle" ])
+			try expect(result) == "Hello World"
+		}
 
-    it("can render a template from a string literal") {
-      let template: Template = "Hello World"
-      let result = try template.render([ "name": "Kyle" ])
-      try expect(result) == "Hello World"
-    }
-  }
+		it("can render a template from a string literal") {
+			let template: Template = "Hello World"
+			let result = try template.render([ "name": "Kyle" ])
+			try expect(result) == "Hello World"
+		}
+
+		it("can render a template with escaped token") {
+			let template: Template = "Hello \\{{ name }}"
+			let result = try template.render([ "name": "Kyle" ])
+			try expect(result) == "Hello {{ name }}"
+		}
+	}
 }

Tests/StencilTests/TokenSpec.swift

@@ -1,40 +1,34 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class TokenTests: XCTestCase {
-  func testToken() {
-    it("can split the contents into components") {
-      let token = Token.text(value: "hello world", at: .unknown)
-      let components = token.components
+	func testToken() {
+		it("can split the contents into components") {
+			let token = Token.text(value: "hello world", at: .unknown)
+			let components = token.components
 
-      try expect(components.count) == 2
-      try expect(components[0]) == "hello"
-      try expect(components[1]) == "world"
-    }
+			try expect(components.count) == 2
+			try expect(components[0]) == "hello"
+			try expect(components[1]) == "world"
+		}
 
-    it("can split the contents into components with single quoted strings") {
-      let token = Token.text(value: "hello 'kyle fuller'", at: .unknown)
-      let components = token.components
+		it("can split the contents into components with single quoted strings") {
+			let token = Token.text(value: "hello 'kyle fuller'", at: .unknown)
+			let components = token.components
 
-      try expect(components.count) == 2
-      try expect(components[0]) == "hello"
-      try expect(components[1]) == "'kyle fuller'"
-    }
+			try expect(components.count) == 2
+			try expect(components[0]) == "hello"
+			try expect(components[1]) == "'kyle fuller'"
+		}
 
-    it("can split the contents into components with double quoted strings") {
-      let token = Token.text(value: "hello \"kyle fuller\"", at: .unknown)
-      let components = token.components
+		it("can split the contents into components with double quoted strings") {
+			let token = Token.text(value: "hello \"kyle fuller\"", at: .unknown)
+			let components = token.components
 
-      try expect(components.count) == 2
-      try expect(components[0]) == "hello"
-      try expect(components[1]) == "\"kyle fuller\""
-    }
-  }
+			try expect(components.count) == 2
+			try expect(components[0]) == "hello"
+			try expect(components[1]) == "\"kyle fuller\""
+		}
+	}
 }

Tests/StencilTests/TrimBehaviourSpec.swift

@@ -1,9 +1,3 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 import Stencil
 import XCTest

Tests/StencilTests/VariableSpec.swift

@@ -1,365 +1,359 @@
-//
-// Stencil
-// Copyright © 2022 Stencil
-// MIT Licence
-//
-
 import Spectre
 @testable import Stencil
 import XCTest
 
 final class VariableTests: XCTestCase {
-  private let context: Context = {
-    let ext = Extension()
-    ext.registerFilter("incr") { arg in
-      (arg.flatMap { toNumber(value: $0) } ?? 0) + 1
-    }
-    let environment = Environment(extensions: [ext])
+	private let context: Context = {
+		let ext = Extension()
+		ext.registerFilter("incr") { arg in
+			(arg.flatMap { toNumber(value: $0) } ?? 0) + 1
+		}
+		let environment = Environment(extensions: [ext])
 
-    var context = Context(dictionary: [
-      "name": "Kyle",
-      "contacts": ["Katie", "Carlton"],
-      "profiles": [
-        "github": "kylef"
-      ],
-      "counter": [
-        "count": "kylef"
-      ],
-      "article": Article(author: Person(name: "Kyle")),
-      "blog": Blog(),
-      "tuple": (one: 1, two: 2),
-      "dynamic": [
-        "enum": DynamicEnum.someValue,
-        "struct": DynamicStruct()
-      ]
-    ], environment: environment)
-    #if os(OSX)
-    context["object"] = Object()
-    #endif
-    return context
-  }()
+		var context = Context(dictionary: [
+			"name": "Kyle",
+			"contacts": ["Katie", "Carlton"],
+			"profiles": [
+				"github": "kylef"
+			],
+			"counter": [
+				"count": "kylef"
+			],
+			"article": Article(author: Person(name: "Kyle")),
+			"blog": Blog(),
+			"tuple": (one: 1, two: 2),
+			"dynamic": [
+				"enum": DynamicEnum.someValue,
+				"struct": DynamicStruct()
+			]
+		], environment: environment)
+		#if os(OSX)
+		context["object"] = Object()
+		#endif
+		return context
+	}()
 
-  func testLiterals() {
-    it("can resolve a string literal with double quotes") {
-      let variable = Variable("\"name\"")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "name"
-    }
+	func testLiterals() {
+		it("can resolve a string literal with double quotes") {
+			let variable = Variable("\"name\"")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "name"
+		}
 
-    it("can resolve a string literal with one double quote") {
-      let variable = Variable("\"")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result).to.beNil()
-    }
+		it("can resolve a string literal with one double quote") {
+			let variable = Variable("\"")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result).to.beNil()
+		}
 
-    it("can resolve a string literal with single quotes") {
-      let variable = Variable("'name'")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "name"
-    }
+		it("can resolve a string literal with single quotes") {
+			let variable = Variable("'name'")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "name"
+		}
 
-    it("can resolve a string literal with one single quote") {
-      let variable = Variable("'")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result).to.beNil()
-    }
+		it("can resolve a string literal with one single quote") {
+			let variable = Variable("'")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result).to.beNil()
+		}
 
-    it("can resolve an integer literal") {
-      let variable = Variable("5")
-      let result = try variable.resolve(self.context) as? Int
-      try expect(result) == 5
-    }
+		it("can resolve an integer literal") {
+			let variable = Variable("5")
+			let result = try variable.resolve(self.context) as? Int
+			try expect(result) == 5
+		}
 
-    it("can resolve an float literal") {
-      let variable = Variable("3.14")
-      let result = try variable.resolve(self.context) as? Number
-      try expect(result) == 3.14
-    }
+		it("can resolve an float literal") {
+			let variable = Variable("3.14")
+			let result = try variable.resolve(self.context) as? Number
+			try expect(result) == 3.14
+		}
 
-    it("can resolve boolean literal") {
-      try expect(Variable("true").resolve(self.context) as? Bool) == true
-      try expect(Variable("false").resolve(self.context) as? Bool) == false
-      try expect(Variable("0").resolve(self.context) as? Int) == 0
-      try expect(Variable("1").resolve(self.context) as? Int) == 1
-    }
-  }
+		it("can resolve boolean literal") {
+			try expect(Variable("true").resolve(self.context) as? Bool) == true
+			try expect(Variable("false").resolve(self.context) as? Bool) == false
+			try expect(Variable("0").resolve(self.context) as? Int) == 0
+			try expect(Variable("1").resolve(self.context) as? Int) == 1
+		}
+	}
 
-  func testVariable() {
-    it("can resolve a string variable") {
-      let variable = Variable("name")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Kyle"
-    }
-  }
+	func testVariable() {
+		it("can resolve a string variable") {
+			let variable = Variable("name")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Kyle"
+		}
+	}
 
-  func testDictionary() {
-    it("can resolve an item from a dictionary") {
-      let variable = Variable("profiles.github")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "kylef"
-    }
+	func testDictionary() {
+		it("can resolve an item from a dictionary") {
+			let variable = Variable("profiles.github")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "kylef"
+		}
 
-    it("can get the count of a dictionary") {
-      let variable = Variable("profiles.count")
-      let result = try variable.resolve(self.context) as? Int
-      try expect(result) == 1
-    }
-  }
+		it("can get the count of a dictionary") {
+			let variable = Variable("profiles.count")
+			let result = try variable.resolve(self.context) as? Int
+			try expect(result) == 1
+		}
+	}
 
-  func testArray() {
-    it("can resolve an item from an array via it's index") {
-      let variable = Variable("contacts.0")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Katie"
+	func testArray() {
+		it("can resolve an item from an array via it's index") {
+			let variable = Variable("contacts.0")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Katie"
 
-      let variable1 = Variable("contacts.1")
-      let result1 = try variable1.resolve(self.context) as? String
-      try expect(result1) == "Carlton"
-    }
+			let variable1 = Variable("contacts.1")
+			let result1 = try variable1.resolve(self.context) as? String
+			try expect(result1) == "Carlton"
+		}
 
-    it("can resolve an item from an array via unknown index") {
-      let variable = Variable("contacts.5")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result).to.beNil()
+		it("can resolve an item from an array via unknown index") {
+			let variable = Variable("contacts.5")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result).to.beNil()
 
-      let variable1 = Variable("contacts.-5")
-      let result1 = try variable1.resolve(self.context) as? String
-      try expect(result1).to.beNil()
-    }
+			let variable1 = Variable("contacts.-5")
+			let result1 = try variable1.resolve(self.context) as? String
+			try expect(result1).to.beNil()
+		}
 
-    it("can resolve the first item from an array") {
-      let variable = Variable("contacts.first")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Katie"
-    }
+		it("can resolve the first item from an array") {
+			let variable = Variable("contacts.first")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Katie"
+		}
 
-    it("can resolve the last item from an array") {
-      let variable = Variable("contacts.last")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Carlton"
-    }
-  }
+		it("can resolve the last item from an array") {
+			let variable = Variable("contacts.last")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Carlton"
+		}
+	}
 
-  func testDynamicMemberLookup() {
-    it("can resolve dynamic member lookup") {
-      let variable = Variable("dynamic.struct.test")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "this is a dynamic response"
-    }
+	func testDynamicMemberLookup() {
+		it("can resolve dynamic member lookup") {
+			let variable = Variable("dynamic.struct.test")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "this is a dynamic response"
+		}
 
-    it("can resolve dynamic enum rawValue") {
-      let variable = Variable("dynamic.enum.rawValue")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "this is raw value"
-    }
-  }
+		it("can resolve dynamic enum rawValue") {
+			let variable = Variable("dynamic.enum.rawValue")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "this is raw value"
+		}
+	}
 
-  func testReflection() {
-    it("can resolve a property with reflection") {
-      let variable = Variable("article.author.name")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Kyle"
-    }
+	func testReflection() {
+		it("can resolve a property with reflection") {
+			let variable = Variable("article.author.name")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Kyle"
+		}
 
-    it("can resolve a value via reflection") {
-      let variable = Variable("blog.articles.0.author.name")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Kyle"
-    }
+		it("can resolve a value via reflection") {
+			let variable = Variable("blog.articles.0.author.name")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Kyle"
+		}
 
-    it("can resolve a superclass value via reflection") {
-      let variable = Variable("blog.url")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "blog.com"
-    }
+		it("can resolve a superclass value via reflection") {
+			let variable = Variable("blog.url")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "blog.com"
+		}
 
-    it("can resolve optional variable property using reflection") {
-      let variable = Variable("blog.featuring.author.name")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Jhon"
-    }
-  }
+		it("can resolve optional variable property using reflection") {
+			let variable = Variable("blog.featuring.author.name")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Jhon"
+		}
+	}
 
-  func testKVO() {
-    #if os(OSX)
-    it("can resolve a value via KVO") {
-      let variable = Variable("object.title")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Hello World"
-    }
+	func testKVO() {
+		#if os(OSX)
+		it("can resolve a value via KVO") {
+			let variable = Variable("object.title")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Hello World"
+		}
 
-    it("can resolve a superclass value via KVO") {
-      let variable = Variable("object.name")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result) == "Foo"
-    }
+		it("can resolve a superclass value via KVO") {
+			let variable = Variable("object.name")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result) == "Foo"
+		}
 
-    it("does not crash on KVO") {
-      let variable = Variable("object.fullname")
-      let result = try variable.resolve(self.context) as? String
-      try expect(result).to.beNil()
-    }
-    #endif
-  }
+		it("does not crash on KVO") {
+			let variable = Variable("object.fullname")
+			let result = try variable.resolve(self.context) as? String
+			try expect(result).to.beNil()
+		}
+		#endif
+	}
 
-  func testTuple() {
-    it("can resolve tuple by index") {
-      let variable = Variable("tuple.0")
-      let result = try variable.resolve(self.context) as? Int
-      try expect(result) == 1
-    }
+	func testTuple() {
+		it("can resolve tuple by index") {
+			let variable = Variable("tuple.0")
+			let result = try variable.resolve(self.context) as? Int
+			try expect(result) == 1
+		}
 
-    it("can resolve tuple by label") {
-      let variable = Variable("tuple.two")
-      let result = try variable.resolve(self.context) as? Int
-      try expect(result) == 2
-    }
-  }
+		it("can resolve tuple by label") {
+			let variable = Variable("tuple.two")
+			let result = try variable.resolve(self.context) as? Int
+			try expect(result) == 2
+		}
+	}
 
-  func testOptional() {
-    it("does not render Optional") {
-      var array: [Any?] = [1, nil]
-      array.append(array)
-      let context = Context(dictionary: ["values": array])
+	func testOptional() {
+		it("does not render Optional") {
+			var array: [Any?] = [1, nil]
+			array.append(array)
+			let context = Context(dictionary: ["values": array])
 
-      try expect(VariableNode(variable: "values").render(context)) == "[1, nil, [1, nil]]"
-      try expect(VariableNode(variable: "values.1").render(context)) == ""
-    }
-  }
+			try expect(VariableNode(variable: "values").render(context)) == "[1, nil, [1, nil]]"
+			try expect(VariableNode(variable: "values.1").render(context)) == ""
+		}
+	}
 
-  func testSubscripting() {
-    it("can resolve a property subscript via reflection") {
-      try self.context.push(dictionary: ["property": "name"]) {
-        let variable = Variable("article.author[property]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Kyle"
-      }
-    }
+	func testSubscripting() {
+		it("can resolve a property subscript via reflection") {
+			try self.context.push(dictionary: ["property": "name"]) {
+				let variable = Variable("article.author[property]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Kyle"
+			}
+		}
 
-    it("can subscript an array with a valid index") {
-      try self.context.push(dictionary: ["property": 0]) {
-        let variable = Variable("contacts[property]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Katie"
-      }
-    }
+		it("can subscript an array with a valid index") {
+			try self.context.push(dictionary: ["property": 0]) {
+				let variable = Variable("contacts[property]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Katie"
+			}
+		}
 
-    it("can subscript an array with an unknown index") {
-      try self.context.push(dictionary: ["property": 5]) {
-        let variable = Variable("contacts[property]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result).to.beNil()
-      }
-    }
+		it("can subscript an array with an unknown index") {
+			try self.context.push(dictionary: ["property": 5]) {
+				let variable = Variable("contacts[property]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result).to.beNil()
+			}
+		}
 
-    #if os(OSX)
-    it("can resolve a subscript via KVO") {
-      try self.context.push(dictionary: ["property": "name"]) {
-        let variable = Variable("object[property]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Foo"
-      }
-    }
-    #endif
+		#if os(OSX)
+		it("can resolve a subscript via KVO") {
+			try self.context.push(dictionary: ["property": "name"]) {
+				let variable = Variable("object[property]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Foo"
+			}
+		}
+		#endif
 
-    it("can resolve an optional subscript via reflection") {
-      try self.context.push(dictionary: ["property": "featuring"]) {
-        let variable = Variable("blog[property].author.name")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Jhon"
-      }
-    }
-  }
+		it("can resolve an optional subscript via reflection") {
+			try self.context.push(dictionary: ["property": "featuring"]) {
+				let variable = Variable("blog[property].author.name")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Jhon"
+			}
+		}
+	}
 
-  func testMultipleSubscripting() {
-    it("can resolve multiple subscripts") {
-      try self.context.push(dictionary: [
-        "prop1": "articles",
-        "prop2": 0,
-        "prop3": "name"
-      ]) {
-        let variable = Variable("blog[prop1][prop2].author[prop3]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Kyle"
-      }
-    }
+	func testMultipleSubscripting() {
+		it("can resolve multiple subscripts") {
+			try self.context.push(dictionary: [
+				"prop1": "articles",
+				"prop2": 0,
+				"prop3": "name"
+			]) {
+				let variable = Variable("blog[prop1][prop2].author[prop3]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Kyle"
+			}
+		}
 
-    it("can resolve nested subscripts") {
-      try self.context.push(dictionary: [
-        "prop1": "prop2",
-        "ref": ["prop2": "name"]
-      ]) {
-        let variable = Variable("article.author[ref[prop1]]")
-        let result = try variable.resolve(self.context) as? String
-        try expect(result) == "Kyle"
-      }
-    }
+		it("can resolve nested subscripts") {
+			try self.context.push(dictionary: [
+				"prop1": "prop2",
+				"ref": ["prop2": "name"]
+			]) {
+				let variable = Variable("article.author[ref[prop1]]")
+				let result = try variable.resolve(self.context) as? String
+				try expect(result) == "Kyle"
+			}
+		}
 
-    it("throws for invalid keypath syntax") {
-      try self.context.push(dictionary: ["prop": "name"]) {
-        let samples = [
-          ".",
-          "..",
-          ".test",
-          "test..test",
-          "[prop]",
-          "article.author[prop",
-          "article.author[[prop]",
-          "article.author[prop]]",
-          "article.author[]",
-          "article.author[[]]",
-          "article.author[prop][]",
-          "article.author[prop]comments",
-          "article.author[.]"
-        ]
+		it("throws for invalid keypath syntax") {
+			try self.context.push(dictionary: ["prop": "name"]) {
+				let samples = [
+					".",
+					"..",
+					".test",
+					"test..test",
+					"[prop]",
+					"article.author[prop",
+					"article.author[[prop]",
+					"article.author[prop]]",
+					"article.author[]",
+					"article.author[[]]",
+					"article.author[prop][]",
+					"article.author[prop]comments",
+					"article.author[.]"
+				]
 
-        for lookup in samples {
-          let variable = Variable(lookup)
-          try expect(variable.resolve(self.context)).toThrow()
-        }
-      }
-    }
-  }
+				for lookup in samples {
+					let variable = Variable(lookup)
+					try expect(variable.resolve(self.context)).toThrow()
+				}
+			}
+		}
+	}
 
-  func testRangeVariable() {
-    func makeVariable(_ token: String) throws -> RangeVariable? {
-      let token = Token.variable(value: token, at: .unknown)
-      return try RangeVariable(token.contents, environment: context.environment, containedIn: token)
-    }
+	func testRangeVariable() {
+		func makeVariable(_ token: String) throws -> RangeVariable? {
+			let token = Token.variable(value: token, at: .unknown)
+			return try RangeVariable(token.contents, environment: context.environment, containedIn: token)
+		}
 
-    it("can resolve closed range as array") {
-      let result = try makeVariable("1...3")?.resolve(self.context) as? [Int]
-      try expect(result) == [1, 2, 3]
-    }
+		it("can resolve closed range as array") {
+			let result = try makeVariable("1...3")?.resolve(self.context) as? [Int]
+			try expect(result) == [1, 2, 3]
+		}
 
-    it("can resolve decreasing closed range as reversed array") {
-      let result = try makeVariable("3...1")?.resolve(self.context) as? [Int]
-      try expect(result) == [3, 2, 1]
-    }
+		it("can resolve decreasing closed range as reversed array") {
+			let result = try makeVariable("3...1")?.resolve(self.context) as? [Int]
+			try expect(result) == [3, 2, 1]
+		}
 
-    it("can use filter on range variables") {
-      let result = try makeVariable("1|incr...3|incr")?.resolve(self.context) as? [Int]
-      try expect(result) == [2, 3, 4]
-    }
+		it("can use filter on range variables") {
+			let result = try makeVariable("1|incr...3|incr")?.resolve(self.context) as? [Int]
+			try expect(result) == [2, 3, 4]
+		}
 
-    it("throws when left value is not int") {
-      let template: Template = "{% for i in k...j %}{{ i }}{% endfor %}"
-      try expect(try template.render(Context(dictionary: ["j": 3, "k": "1"]))).toThrow()
-    }
+		it("throws when left value is not int") {
+			let template: Template = "{% for i in k...j %}{{ i }}{% endfor %}"
+			try expect(try template.render(Context(dictionary: ["j": 3, "k": "1"]))).toThrow()
+		}
 
-    it("throws when right value is not int") {
-      let variable = try makeVariable("k...j")
-      try expect(try variable?.resolve(Context(dictionary: ["j": "3", "k": 1]))).toThrow()
-    }
+		it("throws when right value is not int") {
+			let variable = try makeVariable("k...j")
+			try expect(try variable?.resolve(Context(dictionary: ["j": "3", "k": 1]))).toThrow()
+		}
 
-    it("throws is left range value is missing") {
-      try expect(makeVariable("...1")).toThrow()
-    }
+		it("throws is left range value is missing") {
+			try expect(makeVariable("...1")).toThrow()
+		}
 
-    it("throws is right range value is missing") {
-      try expect(makeVariable("1...")).toThrow()
-    }
-  }
+		it("throws is right range value is missing") {
+			try expect(makeVariable("1...")).toThrow()
+		}
+	}
 }
 
 // MARK: - Helpers
@@ -367,38 +361,38 @@ final class VariableTests: XCTestCase {
 #if os(OSX)
 @objc
 class Superclass: NSObject {
-  @objc let name = "Foo"
+	@objc let name = "Foo"
 }
 @objc
 class Object: Superclass {
-  @objc let title = "Hello World"
+	@objc let title = "Hello World"
 }
 #endif
 
 private struct Person {
-  let name: String
+	let name: String
 }
 
 private struct Article {
-  let author: Person
+	let author: Person
 }
 
 private class WebSite {
-  let url: String = "blog.com"
+	let url: String = "blog.com"
 }
 
 private class Blog: WebSite {
-  let articles: [Article] = [Article(author: Person(name: "Kyle"))]
-  let featuring: Article? = Article(author: Person(name: "Jhon"))
+	let articles: [Article] = [Article(author: Person(name: "Kyle"))]
+	let featuring: Article? = Article(author: Person(name: "Jhon"))
 }
 
 @dynamicMemberLookup
 private struct DynamicStruct: DynamicMemberLookup {
-  subscript(dynamicMember member: String) -> Any? {
-    member == "test" ? "this is a dynamic response" : nil
-  }
+	subscript(dynamicMember member: String) -> Any? {
+		member == "test" ? "this is a dynamic response" : nil
+	}
 }
 
 private enum DynamicEnum: String, DynamicMemberLookup {
-  case someValue = "this is raw value"
+	case someValue = "this is raw value"
 }

docs/_templates/sidebar_intro.html

@@ -2,7 +2,7 @@
 
 <p>
   <iframe
-      src="https://ghbtns.com/github-btn.html?user=stencilproject&repo=Stencil&type=watch&count=true&size=large"
+      src="https://ghbtns.com/github-btn.html?user=swiftstencil&repo=swiftpm-stencil&type=watch&count=true&size=large"
       allowtransparency="true" frameborder="0" scrolling="0" width="200px" height="35px">
   </iframe>
 </p>
@@ -12,22 +12,8 @@
 <div class="social">
   <p>
     <iframe
-      src="https://ghbtns.com/github-btn.html?user=kylef&type=follow&count=false"
+      src="https://ghbtns.com/github-btn.html?user=swiftstencil&type=follow&count=false"
       allowtransparency="true" frameborder="0" scrolling="0" width="200" height="20">
     </iframe>
   </p>
-
-  <p>
-    <a href="https://twitter.com/kylefuller" class="twitter-follow-button" data-show-count="false">Follow @kylefuller</a> <script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
-  </p>
 </div>
-
-<h3>Other Projects</h3>
-
-<p>More <a href="https://fuller.li/">Kyle Fuller</a> projects:</p>
-<ul>
-  <li><a href="https://github.com/kylef/Commander">Commander</a></li>
-  <li><a href="https://curassow.fuller.li/">Curassow</a></li>
-  <li><a href="https://github.com/kylef/Spectre">Spectre</a></li>
-  <li><a href="https://github.com/kylef/heroku-buildpack-swift">Heroku Swift buildpack</a></li>
-</ul>

docs/conf.py

@@ -50,7 +50,7 @@ master_doc = 'index'
 
 # General information about the project.
 project = 'Stencil'
-copyright = '2022, Kyle Fuller'
+copyright = [ '2022, Kyle Fuller', '2025, Astzweig GmbH & Co. KG' ]
 author = 'Kyle Fuller'
 
 # The version info for the project you're documenting, acts as replacement for
@@ -58,9 +58,9 @@ author = 'Kyle Fuller'
 # built documents.
 #
 # The short X.Y version.
-version = '0.15.0'
+version = '0.15.2'
 # The full version, including alpha/beta/rc tags.
-release = '0.15.0'
+release = '0.15.2'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.

docs/index.rst

@@ -31,7 +31,7 @@ feel right at home with Stencil.
       ]
     ]
 
-    let environment = Environment(loader: FileSystemLoader(paths: ["templates/"])
+    let environment = Environment(loader: FileSystemLoader(paths: ["templates/"]))
     let rendered = try environment.renderTemplate(name: "articles.html", context: context)
 
     print(rendered)

docs/installation.rst

@@ -14,39 +14,6 @@ dependencies inside ``Package.swift``.
     let package = Package(
       name: "MyApplication",
       dependencies: [
-        .package(url: "https://github.com/stencilproject/Stencil.git", from: "0.15.0"),
+        .package(url: "https://github.com/swiftstencil/swiftpm-stencil.git", from: "0.15.2"),
       ]
     )
-
-CocoaPods
----------
-
-If you're using CocoaPods, you can add Stencil to your ``Podfile`` and then run
-``pod install``.
-
-.. code-block:: ruby
-
-    pod 'Stencil', '~> 0.15.0'
-
-Carthage
---------
-
-.. note:: Use at your own risk. We don't offer support for Carthage and instead recommend you use Swift Package Manager.
-
-1) Add ``Stencil`` to your ``Cartfile``:
-
-    .. code-block:: text
-
-        github "stencilproject/Stencil" ~> 0.15.0
-
-2) Checkout your dependencies, generate the Stencil Xcode project, and then use Carthage to build Stencil:
-
-    .. code-block:: shell
-
-        $ carthage update
-        $ (cd Carthage/Checkouts/Stencil && swift package generate-xcodeproj)
-        $ carthage build
-
-3) Follow the Carthage steps to add the built frameworks to your project.
-
-To learn more about this approach see `Using Swift Package Manager with Carthage <https://fuller.li/posts/using-swift-package-manager-with-carthage/>`_.

docs/templates.rst

@@ -113,12 +113,10 @@ To comment out part of your template, you can use the following syntax:
 
     {# My comment is completely hidden #}
 
-.. _template-inheritance:
-
 Whitespace Control
 ------------------
 
-Stencil supports the same syntax as Jinja for whitespace control, see [their docs for more information](https://jinja.palletsprojects.com/en/3.1.x/templates/#whitespace-control).
+Stencil supports the same syntax as Jinja for whitespace control, see `their docs for more information <https://jinja.palletsprojects.com/en/3.1.x/templates/#whitespace-control>`_.
 
 Essentially, Stencil will **not** trim whitespace by default. However you can:
 
@@ -126,6 +124,8 @@ Essentially, Stencil will **not** trim whitespace by default. However you can:
 - You can disable this per-block using the `+` control character. For example `{{+ if … }}` to preserve whitespace before.
 - You can force trimming per-block by using the `-` control character. For example `{{ if … -}}` to trim whitespace after.
 
+.. _template-inheritance:
+
 Template inheritance
 --------------------
 

rakelib/check_changelog.rb

@@ -42,7 +42,7 @@ def check_changelog
 
     # Now, check that links [#nn](.../nn) have matching numbers in link title & URL
     wrong_links = line.scan(links).reject do |m|
-      slug = m[0] || "stencilproject/#{current_repo}"
+      slug = m[0] || "stencilproject/Stencil"
       (slug == m[2]) && (m[1] == m[4])
     end
     all_warnings.concat Array(wrong_links.map do |m|

rakelib/lint.rake

@@ -5,9 +5,9 @@
 
 namespace :lint do
   SWIFTLINT = 'rakelib/lint.sh'
-  SWIFTLINT_VERSION = '0.48.0'
+  SWIFTLINT_VERSION = '0.61.0'
 
-  task :install do |task| 
+  task :install do |task|
     next if check_version
 
     if OS.mac?

rakelib/release.rake

@@ -7,7 +7,7 @@ require 'json'
 
 namespace :release do
   desc 'Create a new release'
-  task :new => [:check_versions, :check_tag_and_ask_to_release, 'spm:test', :github, :cocoapods]
+  task :new => [:check_versions, :check_tag_and_ask_to_release, 'spm:test', :github]
 
   desc 'Check if all versions from the podspecs and CHANGELOG match'
   task :check_versions do
@@ -15,7 +15,7 @@ namespace :release do
 
     Utils.table_header('Check', 'Status')
 
-    # Check if bundler is installed first, as we'll need it for the cocoapods task (and we prefer to fail early)
+    # Check if bundler is installed first (we prefer to fail early)
     `which bundler`
     results << Utils.table_result(
       $CHILD_STATUS.success?,
@@ -40,18 +40,14 @@ namespace :release do
 
     # Check docs installation
     docs_package = Utils.first_match_in_file('docs/installation.rst', /\.package\(url: .+ from: "(.+)"/, 1)
-    docs_cocoapods = Utils.first_match_in_file('docs/installation.rst', /pod 'Stencil', '~> (.+)'/, 1)
-    docs_carthage = Utils.first_match_in_file('docs/installation.rst', /github ".+\/Stencil" ~> (.+)/, 1)
     results << Utils.table_result(docs_package == v, 'Docs, package updated', 'Update the package version in docs/installation.rst')
-    results << Utils.table_result(docs_cocoapods == v, 'Docs, cocoapods updated', 'Update the cocoapods version in docs/installation.rst')
-    results << Utils.table_result(docs_carthage == v, 'Docs, carthage updated', 'Update the carthage version in docs/installation.rst')
 
     # Check if entry present in CHANGELOG
     changelog_entry = Utils.first_match_in_file('CHANGELOG.md', /^## #{Regexp.quote(v)}$/)
     results << Utils.table_result(changelog_entry, 'CHANGELOG, Entry added', "Add an entry for #{v} in CHANGELOG.md")
 
     changelog_has_stable = system("grep -qi '^## Master' CHANGELOG.md")
-    results << Utils.table_result(!changelog_has_stable, 'CHANGELOG, No master', 'Remove section for master branch in CHANGELOG')
+    results << Utils.table_result(!changelog_has_stable, 'CHANGELOG, No master', 'Remove section for main branch in CHANGELOG')
 
     exit 1 unless results.all?
   end
@@ -82,16 +78,10 @@ namespace :release do
     tag = Utils.top_changelog_version
     body = Utils.top_changelog_entry
 
-    raise 'Must be a valid version' if tag == 'Master'
+    raise 'Must be a valid version' if tag == 'main'
 
     repo_name = File.basename(`git remote get-url origin`.chomp, '.git').freeze
     puts "Pushing release notes for tag #{tag}"
-    client.create_release("stencilproject/#{repo_name}", tag, name: tag, body: body)
-  end
-
-  desc "pod trunk push #{POD_NAME} to CocoaPods"
-  task :cocoapods do
-    Utils.print_header 'Pushing pod to CocoaPods Trunk'
-    sh "bundle exec pod trunk push #{POD_NAME}.podspec.json"
+    client.create_release("swiftstencil/#{repo_name}", tag, name: tag, body: body)
   end
 end

rakelib/utils.rake

@@ -55,7 +55,7 @@ class Utils
   def self.spm_own_version(dep)
     dependencies = JSON.load(File.new('Package.resolved'))['object']['pins']
     dependencies.find { |d| d['package'] == dep }['state']['version']
-  end  
+  end
 
   def self.spm_resolved_version(dep)
     dependencies = JSON.load(File.new('Package.resolved'))['object']['pins']