0001    // The MIT License
0002    //
0003    // Copyright (c) 2015 Gwendal Roué
0004    //
0005    // Permission is hereby granted, free of charge, to any person obtaining a copy
0006    // of this software and associated documentation files (the "Software"), to deal
0007    // in the Software without restriction, including without limitation the rights
0008    // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
0009    // copies of the Software, and to permit persons to whom the Software is
0010    // furnished to do so, subject to the following conditions:
0011    //
0012    // The above copyright notice and this permission notice shall be included in
0013    // all copies or substantial portions of the Software.
0014    //
0015    // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0016    // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0017    // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
0018    // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
0019    // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
0020    // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
0021    // THE SOFTWARE.
0022    
0023    struct ExpressionInvocation
Context.swift:205
        let invocation = ExpressionInvocation(expression: expression)
RenderingEngine.swift:134
            box = try ExpressionInvocation(expression: expression).invokeWithContext(context) {
0024        let expression
ExpressionInvocation.swift:27
        return try evaluate(context: context, expression: expression): Expression
0025        
0026        func invokeWithContext
Context.swift:206
        return try invocation.invokeWithContext(self)
RenderingEngine.swift:134
            box = try ExpressionInvocation(expression: expression).invokeWithContext(context)(context: Context) throws -> MustacheBox {
0027            return try evaluate(context: context, expression: expression)
0028        }
0029        
0030        private func evaluate
ExpressionInvocation.swift:27
        return try evaluate(context: context, expression: expression)
ExpressionInvocation.swift:45
            return try evaluate(context: context, expression: baseExpression).mustacheBoxForKey(identifier)
ExpressionInvocation.swift:50
            let filterBox = try evaluate(context: context, expression: filterExpression)
ExpressionInvocation.swift:60
            let argumentBox = try evaluate(context: context, expression: argumentExpression)(context context: Context, expression: Expression) throws -> MustacheBox {
0031            switch expression {
0032            case .ImplicitIterator:
0033                // {{ . }}
0034                
0035                return context.topBox
0036                
0037            case .Identifier(let identifier):
0038                // {{ identifier }}
0039                
0040                return context.mustacheBoxForKey(identifier)
0041    
0042            case .Scoped(let baseExpression, let identifier):
0043                // {{ <expression>.identifier }}
0044                
0045                return try evaluate(context: context, expression: baseExpression).mustacheBoxForKey(identifier)
0046                
0047            case .Filter(let filterExpression, let argumentExpression, let partialApplication):
0048                // {{ <expression>(<expression>) }}
0049                
0050                let filterBox = try evaluate(context: context, expression: filterExpression)
0051                
0052                guard let filter = filterBox.filter else {
0053                    if filterBox.isEmpty {
0054                        throw MustacheError(kind: .RenderError, message: "Missing filter")
0055                    } else {
0056                        throw MustacheError(kind: .RenderError, message: "Not a filter")
0057                    }
0058                }
0059                
0060                let argumentBox = try evaluate(context: context, expression: argumentExpression)
0061                return try filter(box: argumentBox, partialApplication: partialApplication)
0062            }
0063        }
0064    }
0065