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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 import 'dart:_js_primitives' show printString; | 5 import 'dart:_js_primitives' show printString; |
6 import 'dart:_js_helper' show patch; | 6 import 'dart:_js_helper' show patch; |
7 import 'dart:_interceptors' show JSArray; | 7 import 'dart:_interceptors' show JSArray; |
8 import 'dart:_foreign_helper' show JS; | 8 import 'dart:_foreign_helper' show JS; |
9 | 9 |
10 @patch | 10 @patch |
11 class Symbol implements core.Symbol { | 11 class Symbol implements core.Symbol { |
12 @patch | 12 @patch |
13 const Symbol(String name) | 13 const Symbol(String name) : this._name = name; |
14 : this._name = name; | |
15 | 14 |
16 @patch | 15 @patch |
17 int get hashCode { | 16 int get hashCode { |
18 int hash = JS('int|Null', '#._hashCode', this); | 17 int hash = JS('int|Null', '#._hashCode', this); |
19 if (hash != null) return hash; | 18 if (hash != null) return hash; |
20 const arbitraryPrime = 664597; | 19 const arbitraryPrime = 664597; |
21 hash = 0x1fffffff & (arbitraryPrime * _name.hashCode); | 20 hash = 0x1fffffff & (arbitraryPrime * _name.hashCode); |
22 JS('', '#._hashCode = #', this, hash); | 21 JS('', '#._hashCode = #', this, hash); |
23 return hash; | 22 return hash; |
24 } | 23 } |
25 | 24 |
26 @patch | 25 @patch |
27 toString() => 'Symbol("$_name")'; | 26 toString() => 'Symbol("$_name")'; |
28 } | 27 } |
29 | 28 |
30 /// Used internally by DDC to map ES6 symbols to Dart. | 29 /// Used internally by DDC to map ES6 symbols to Dart. |
31 class PrivateSymbol implements core.Symbol { | 30 class PrivateSymbol implements core.Symbol { |
32 // TODO(jmesserly): could also get this off the native symbol instead of | 31 // TODO(jmesserly): could also get this off the native symbol instead of |
33 // storing it. Mirrors already does this conversion. | 32 // storing it. Mirrors already does this conversion. |
34 final String _name; | 33 final String _name; |
35 final Object _nativeSymbol; | 34 final Object _nativeSymbol; |
36 | 35 |
37 const PrivateSymbol(this._name, this._nativeSymbol); | 36 const PrivateSymbol(this._name, this._nativeSymbol); |
38 | 37 |
39 static String getName(core.Symbol symbol) => | 38 static String getName(core.Symbol symbol) => (symbol as PrivateSymbol)._name; |
40 (symbol as PrivateSymbol)._name; | |
41 | 39 |
42 static Object getNativeSymbol(core.Symbol symbol) { | 40 static Object getNativeSymbol(core.Symbol symbol) { |
43 if (symbol is PrivateSymbol) return symbol._nativeSymbol; | 41 if (symbol is PrivateSymbol) return symbol._nativeSymbol; |
44 return null; | 42 return null; |
45 } | 43 } |
46 | 44 |
47 bool operator ==(other) => other is PrivateSymbol && | 45 bool operator ==(other) => |
48 identical(_nativeSymbol, other._nativeSymbol); | 46 other is PrivateSymbol && identical(_nativeSymbol, other._nativeSymbol); |
49 | 47 |
50 // TODO(jmesserly): is this equivalent to _nativeSymbol toString? | 48 // TODO(jmesserly): is this equivalent to _nativeSymbol toString? |
51 toString() => 'Symbol("$_name")'; | 49 toString() => 'Symbol("$_name")'; |
52 } | 50 } |
53 | 51 |
54 @patch | 52 @patch |
55 void printToConsole(String line) { | 53 void printToConsole(String line) { |
56 printString('$line'); | 54 printString('$line'); |
57 } | 55 } |
58 | 56 |
59 @patch | 57 @patch |
60 List/*<E>*/ makeListFixedLength/*<E>*/(List/*<E>*/ growableList) { | 58 List/*<E>*/ makeListFixedLength/*<E>*/(List/*<E>*/ growableList) { |
61 JSArray.markFixedList(growableList); | 59 JSArray.markFixedList(growableList); |
62 return growableList; | 60 return growableList; |
63 } | 61 } |
64 | 62 |
65 @patch | 63 @patch |
66 List/*<E>*/ makeFixedListUnmodifiable/*<E>*/(List/*<E>*/ fixedLengthList) { | 64 List/*<E>*/ makeFixedListUnmodifiable/*<E>*/(List/*<E>*/ fixedLengthList) { |
67 JSArray.markUnmodifiableList(fixedLengthList); | 65 JSArray.markUnmodifiableList(fixedLengthList); |
68 return fixedLengthList; | 66 return fixedLengthList; |
69 } | 67 } |
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