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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.full_emitter; | 5 part of dart2js.js_emitter.full_emitter; |
6 | 6 |
7 class NsmEmitter extends CodeEmitterHelper { | 7 class NsmEmitter extends CodeEmitterHelper { |
8 final ClosedWorld closedWorld; | 8 final ClosedWorld closedWorld; |
9 final List<Selector> trivialNsmHandlers = <Selector>[]; | 9 final List<Selector> trivialNsmHandlers = <Selector>[]; |
10 | 10 |
11 NsmEmitter(this.closedWorld); | 11 NsmEmitter(this.closedWorld); |
12 | 12 |
13 /// If this is true then we can generate the noSuchMethod handlers at startup | 13 /// If this is true then we can generate the noSuchMethod handlers at startup |
14 /// time, instead of them being emitted as part of the Object class. | 14 /// time, instead of them being emitted as part of the Object class. |
15 bool get generateTrivialNsmHandlers => true; | 15 bool get generateTrivialNsmHandlers => true; |
16 | 16 |
17 // If we need fewer than this many noSuchMethod handlers we can save space by | 17 // If we need fewer than this many noSuchMethod handlers we can save space by |
18 // just emitting them in JS, rather than emitting the JS needed to generate | 18 // just emitting them in JS, rather than emitting the JS needed to generate |
19 // them at run time. | 19 // them at run time. |
20 static const VERY_FEW_NO_SUCH_METHOD_HANDLERS = 10; | 20 static const VERY_FEW_NO_SUCH_METHOD_HANDLERS = 10; |
21 | 21 |
22 static const MAX_MINIFIED_LENGTH_FOR_DIFF_ENCODING = 4; | 22 static const MAX_MINIFIED_LENGTH_FOR_DIFF_ENCODING = 4; |
23 | 23 |
24 void emitNoSuchMethodHandlers(AddPropertyFunction addProperty) { | 24 void emitNoSuchMethodHandlers(AddPropertyFunction addProperty) { |
25 ClassStubGenerator generator = new ClassStubGenerator( | 25 ClassStubGenerator generator = new ClassStubGenerator( |
26 namer, backend, codegenWorld, closedWorld, | 26 namer, backend, codegenWorldBuilder, closedWorld, |
27 enableMinification: compiler.options.enableMinification); | 27 enableMinification: compiler.options.enableMinification); |
28 | 28 |
29 // Keep track of the JavaScript names we've already added so we | 29 // Keep track of the JavaScript names we've already added so we |
30 // do not introduce duplicates (bad for code size). | 30 // do not introduce duplicates (bad for code size). |
31 Map<jsAst.Name, Selector> addedJsNames = | 31 Map<jsAst.Name, Selector> addedJsNames = |
32 generator.computeSelectorsForNsmHandlers(); | 32 generator.computeSelectorsForNsmHandlers(); |
33 | 33 |
34 // Set flag used by generateMethod helper below. If we have very few | 34 // Set flag used by generateMethod helper below. If we have very few |
35 // handlers we use addProperty for them all, rather than try to generate | 35 // handlers we use addProperty for them all, rather than try to generate |
36 // them at runtime. | 36 // them at runtime. |
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391 } | 391 } |
392 | 392 |
393 String get value { | 393 String get value { |
394 if (_cachedValue == null) { | 394 if (_cachedValue == null) { |
395 _cachedValue = _computeDiffEncoding(); | 395 _cachedValue = _computeDiffEncoding(); |
396 } | 396 } |
397 | 397 |
398 return _cachedValue; | 398 return _cachedValue; |
399 } | 399 } |
400 } | 400 } |
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