Use multiline strings

multi

t

t

Sources/Errors.swift

@@ -62,11 +62,16 @@ open class SimpleErrorReporter: ErrorReporter {
     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))))"
+      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)\n"
-        + "\(location.content)\n"
-        + "\(highlight)\n"
+      return """
+        \(templateName)\(location.lineNumber):\(location.lineOffset): error: \(templateError.reason)
+        \(location.content)
+        \(highlight)
+        """
     }
 
     var descriptions = templateError.stackTrace.reduce([]) { $0 + [describe(token: $1)] }

Sources/Filters.swift

@@ -74,7 +74,9 @@ func indentFilter(value: Any?, arguments: [Any?]) throws -> Any? {
   var indentWidth = 4
   if arguments.count > 0 {
     guard let value = arguments[0] as? Int else {
-      throw TemplateSyntaxError("'indent' filter width argument must be an Integer (\(String(describing: arguments[0])))")
+      throw TemplateSyntaxError("""
+        'indent' filter width argument must be an Integer (\(String(describing: arguments[0])))
+        """)
     }
     indentWidth = value
   }
@@ -82,7 +84,9 @@ func indentFilter(value: Any?, arguments: [Any?]) throws -> Any? {
   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]))")
+      throw TemplateSyntaxError("""
+        'indent' filter indentation argument must be a String (\(String(describing: arguments[1]))
+        """)
     }
     indentationChar = value
   }

Sources/Include.swift

@@ -10,7 +10,11 @@ class IncludeNode : 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")
+      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)

Sources/Parser.swift

@@ -98,7 +98,10 @@ public class TokenParser {
     if suggestedFilters.isEmpty {
       throw TemplateSyntaxError("Unknown filter '\(name)'.")
     } else {
-      throw TemplateSyntaxError("Unknown filter '\(name)'. Found similar filters: \(suggestedFilters.map({ "'\($0)'" }).joined(separator: ", ")).")
+      throw TemplateSyntaxError("""
+        Unknown filter '\(name)'. \
+        Found similar filters: \(suggestedFilters.map({ "'\($0)'" }).joined(separator: ", ")).
+        """)
     }
   }