feat(variable): Allow accessing dictionary count

CHANGELOG.md

@@ -9,6 +9,8 @@
 - Introduces a new `DictionaryLoader` for loading templates from a Swift
   Dictionary.
 - Added `in` expression in if tag for strings and arrays of hashable types
+- You can now access the amount of items in a dictionary using the `count`
+  property.
 
 ### Bug Fixes
 

Sources/Variable.swift

@@ -74,7 +74,11 @@ public struct Variable : Equatable, Resolvable {
       if let context = current as? Context {
         current = context[bit]
       } else if let dictionary = current as? [String: Any] {
+        if bit == "count" {
+          current = dictionary.count
+        } else {
           current = dictionary[bit]
+        }
       } else if let array = current as? [Any] {
         if let index = Int(bit) {
           if index >= 0 && index < array.count {

Tests/StencilTests/VariableSpec.swift

@@ -26,6 +26,9 @@ func testVariable() {
       "profiles": [
         "github": "kylef",
       ],
+      "counter": [
+        "count": "kylef",
+        ],
       "article": Article(author: Person(name: "Kyle"))
     ])
 
@@ -107,6 +110,12 @@ func testVariable() {
       try expect(result) == "Kyle"
     }
 
+    $0.it("can get the count of a dictionary") {
+      let variable = Variable("profiles.count")
+      let result = try variable.resolve(context) as? Int
+      try expect(result) == 1
+    }
+
 #if os(OSX)
     $0.it("can resolve a value via KVO") {
       let variable = Variable("object.title")