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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of js_ast; | 5 part of js_ast; |
6 | 6 |
7 class TemplateManager { | 7 class TemplateManager { |
8 Map<String, Template> expressionTemplates = new Map<String, Template>(); | 8 Map<String, Template> expressionTemplates = new Map<String, Template>(); |
9 Map<String, Template> statementTemplates = new Map<String, Template>(); | 9 Map<String, Template> statementTemplates = new Map<String, Template>(); |
10 | 10 |
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114 arguments.keys.where((name) => !holeNames.contains(name)).join(", "); | 114 arguments.keys.where((name) => !holeNames.contains(name)).join(", "); |
115 throw "Template arguments has unused mappings: $unusedNames"; | 115 throw "Template arguments has unused mappings: $unusedNames"; |
116 } | 116 } |
117 if (!holeNames.every((String name) => arguments.containsKey(name))) { | 117 if (!holeNames.every((String name) => arguments.containsKey(name))) { |
118 String notFound = | 118 String notFound = |
119 holeNames.where((name) => !arguments.containsKey(name)).join(", "); | 119 holeNames.where((name) => !arguments.containsKey(name)).join(", "); |
120 throw "Template arguments is missing mappings for: $notFound"; | 120 throw "Template arguments is missing mappings for: $notFound"; |
121 } | 121 } |
122 return instantiator(arguments); | 122 return instantiator(arguments); |
123 } | 123 } |
124 | |
125 /// Like [instantiate] but works with free variables. | |
126 Node safeCreate(Map arguments) { | |
127 if (holeNames.isEmpty) return ast; | |
128 return instantiator(new Map.fromIterable(holeNames, value: (name) { | |
129 var a = arguments[name]; | |
130 return a != null ? a : new InterpolatedExpression(name); | |
131 })); | |
132 } | |
133 } | 124 } |
134 | 125 |
135 /** | 126 /** |
136 * An Instantiator is a Function that generates a JS AST tree or List of | 127 * An Instantiator is a Function that generates a JS AST tree or List of |
137 * trees. [arguments] is a List for positional templates, or Map for | 128 * trees. [arguments] is a List for positional templates, or Map for |
138 * named templates. | 129 * named templates. |
139 */ | 130 */ |
140 typedef Instantiator(var arguments); | 131 typedef Instantiator(var arguments); |
141 | 132 |
142 /** | 133 /** |
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914 if (count != before) containsInterpolatedNode.add(node); | 905 if (count != before) containsInterpolatedNode.add(node); |
915 return null; | 906 return null; |
916 } | 907 } |
917 | 908 |
918 visitInterpolatedNode(InterpolatedNode node) { | 909 visitInterpolatedNode(InterpolatedNode node) { |
919 containsInterpolatedNode.add(node); | 910 containsInterpolatedNode.add(node); |
920 if (node.isNamed) holeNames.add(node.nameOrPosition); | 911 if (node.isNamed) holeNames.add(node.nameOrPosition); |
921 ++count; | 912 ++count; |
922 } | 913 } |
923 } | 914 } |
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