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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, 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 dart2js.js_emitter; | 5 part of dart2js.js_emitter; |
6 | 6 |
7 class MetadataEmitter extends CodeEmitterHelper { | 7 class MetadataEmitter extends CodeEmitterHelper { |
8 /// A list of JS expressions that represent metadata, parameter names and | 8 /// A list of JS expressions that represent metadata, parameter names and |
9 /// type, and return types. | 9 /// type, and return types. |
10 final List<String> globalMetadata = []; | 10 final List<String> globalMetadata = []; |
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83 } | 83 } |
84 | 84 |
85 int addGlobalMetadata(String string) { | 85 int addGlobalMetadata(String string) { |
86 return globalMetadataMap.putIfAbsent(string, () { | 86 return globalMetadataMap.putIfAbsent(string, () { |
87 globalMetadata.add(string); | 87 globalMetadata.add(string); |
88 return globalMetadata.length - 1; | 88 return globalMetadata.length - 1; |
89 }); | 89 }); |
90 } | 90 } |
91 | 91 |
92 void emitMetadata(CodeBuffer buffer) { | 92 void emitMetadata(CodeBuffer buffer) { |
93 var literals = backend.typedefTypeLiterals.toList(); | 93 buffer.write('init.metadata$_=$_['); |
94 Elements.sortedByPosition(literals); | 94 for (String metadata in globalMetadata) { |
95 var properties = []; | |
96 for (TypedefElement literal in literals) { | |
97 var key = namer.getNameX(literal); | |
98 var value = js.number(reifyType(literal.rawType)); | |
99 properties.add(new jsAst.Property(js.string(key), value)); | |
100 } | |
101 var map = new jsAst.ObjectInitializer(properties); | |
102 buffer.write( | |
103 jsAst.prettyPrint( | |
104 js.statement('init.functionAliases = #', map), compiler)); | |
105 buffer.write('${N}init.metadata$_=$_['); | |
106 for (var metadata in globalMetadata) { | |
107 if (metadata is String) { | 95 if (metadata is String) { |
108 if (metadata != 'null') { | 96 if (metadata != 'null') { |
109 buffer.write(metadata); | 97 buffer.write(metadata); |
110 } | 98 } |
111 } else { | 99 } else { |
112 throw 'Unexpected value in metadata: ${Error.safeToString(metadata)}'; | 100 throw 'Unexpected value in metadata: ${Error.safeToString(metadata)}'; |
113 } | 101 } |
114 buffer.write(',$n'); | 102 buffer.write(',$n'); |
115 } | 103 } |
116 buffer.write('];$n'); | 104 buffer.write('];$n'); |
117 } | 105 } |
118 | 106 |
119 List<int> computeMetadata(FunctionElement element) { | 107 List<int> computeMetadata(FunctionElement element) { |
120 return compiler.withCurrentElement(element, () { | 108 return compiler.withCurrentElement(element, () { |
121 if (!backend.retainMetadataOf(element)) return const <int>[]; | 109 if (!backend.retainMetadataOf(element)) return const <int>[]; |
122 List<int> metadata = <int>[]; | 110 List<int> metadata = <int>[]; |
123 Link link = element.metadata; | 111 Link link = element.metadata; |
124 // TODO(ahe): Why is metadata sometimes null? | 112 // TODO(ahe): Why is metadata sometimes null? |
125 if (link != null) { | 113 if (link != null) { |
126 for (; !link.isEmpty; link = link.tail) { | 114 for (; !link.isEmpty; link = link.tail) { |
127 metadata.add(reifyMetadata(link.head)); | 115 metadata.add(reifyMetadata(link.head)); |
128 } | 116 } |
129 } | 117 } |
130 return metadata; | 118 return metadata; |
131 }); | 119 }); |
132 } | 120 } |
133 } | 121 } |
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