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| 1 // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2012, 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 library _js_helper; | 5 library _js_helper; |
| 6 | 6 |
| 7 import 'dart:collection'; | 7 import 'dart:collection'; |
| 8 | 8 |
| 9 part 'constant_map.dart'; | 9 part 'constant_map.dart'; |
| 10 part 'native_helper.dart'; | 10 part 'native_helper.dart'; |
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| 54 : identical(ge$slow(a, b), true); | 54 : identical(ge$slow(a, b), true); |
| 55 | 55 |
| 56 ltB(var a, var b) => (a is num && b is num) | 56 ltB(var a, var b) => (a is num && b is num) |
| 57 ? JS('bool', r'# < #', a, b) | 57 ? JS('bool', r'# < #', a, b) |
| 58 : identical(lt$slow(a, b), true); | 58 : identical(lt$slow(a, b), true); |
| 59 | 59 |
| 60 leB(var a, var b) => (a is num && b is num) | 60 leB(var a, var b) => (a is num && b is num) |
| 61 ? JS('bool', r'# <= #', a, b) | 61 ? JS('bool', r'# <= #', a, b) |
| 62 : identical(le$slow(a, b), true); | 62 : identical(le$slow(a, b), true); |
| 63 | 63 |
| 64 index(var a, var index) { | |
| 65 // The type test may cause a NoSuchMethodError to be thrown but | |
| 66 // that matches the specification of what the indexing operator is | |
| 67 // supposed to do. | |
| 68 bool isJsArrayOrString = JS('bool', | |
| 69 r'typeof # == "string" || #.constructor === Array', | |
| 70 a, a); | |
| 71 if (isJsArrayOrString) { | |
| 72 var key = JS('int', '# >>> 0', index); | |
| 73 if (identical(key, index) && key < JS('int', r'#.length', a)) { | |
| 74 return JS('var', r'#[#]', a, key); | |
| 75 } | |
| 76 } | |
| 77 return index$slow(a, index); | |
| 78 } | |
| 79 | |
| 80 indexSet(var a, var index, var value) { | |
| 81 // The type test may cause a NoSuchMethodError to be thrown but | |
| 82 // that matches the specification of what the indexing operator is | |
| 83 // supposed to do. | |
| 84 bool isMutableJsArray = JS('bool', | |
| 85 r'#.constructor === Array && !#.immutable$list', | |
| 86 a, a); | |
| 87 if (isMutableJsArray) { | |
| 88 var key = JS('int', '# >>> 0', index); | |
| 89 if (identical(key, index) && key < JS('int', r'#.length', a)) { | |
| 90 JS('void', r'#[#] = #', a, key, value); | |
| 91 return; | |
| 92 } | |
| 93 } | |
| 94 indexSet$slow(a, index, value); | |
| 95 } | |
| 96 | |
| 97 /** | 64 /** |
| 98 * Returns true if both arguments are numbers. | 65 * Returns true if both arguments are numbers. |
| 99 * | 66 * |
| 100 * If only the first argument is a number, an | 67 * If only the first argument is a number, an |
| 101 * [ArgumentError] with the other argument is thrown. | 68 * [ArgumentError] with the other argument is thrown. |
| 102 */ | 69 */ |
| 103 bool checkNumbers(var a, var b) { | 70 bool checkNumbers(var a, var b) { |
| 104 if (a is num) { | 71 if (a is num) { |
| 105 if (b is num) { | 72 if (b is num) { |
| 106 return true; | 73 return true; |
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| 273 } | 240 } |
| 274 | 241 |
| 275 xor(var a, var b) { | 242 xor(var a, var b) { |
| 276 // TODO(floitsch): inputs must be integers. | 243 // TODO(floitsch): inputs must be integers. |
| 277 if (checkNumbers(a, b)) { | 244 if (checkNumbers(a, b)) { |
| 278 return JS('num', r'(# ^ #) >>> 0', a, b); | 245 return JS('num', r'(# ^ #) >>> 0', a, b); |
| 279 } | 246 } |
| 280 return UNINTERCEPTED(a ^ b); | 247 return UNINTERCEPTED(a ^ b); |
| 281 } | 248 } |
| 282 | 249 |
| 283 not(var a) { | |
| 284 if (JS('bool', r'typeof # === "number"', a)) { | |
| 285 return JS('num', r'(~#) >>> 0', a); | |
| 286 } | |
| 287 return UNINTERCEPTED(~a); | |
| 288 } | |
| 289 | |
| 290 neg(var a) { | |
| 291 if (JS('bool', r'typeof # === "number"', a)) return JS('num', r'-#', a); | |
| 292 return UNINTERCEPTED(-a); | |
| 293 } | |
| 294 | |
| 295 index$slow(var a, var index) { | |
| 296 if (a is String || isJsArray(a)) { | |
| 297 if (index is !int) { | |
| 298 if (index is !num) throw new ArgumentError(index); | |
| 299 if (!identical(index.truncate(), index)) throw new ArgumentError(index); | |
| 300 } | |
| 301 if (index < 0 || index >= a.length) { | |
| 302 throw new RangeError.value(index); | |
| 303 } | |
| 304 return JS('', r'#[#]', a, index); | |
| 305 } | |
| 306 return UNINTERCEPTED(a[index]); | |
| 307 } | |
| 308 | |
| 309 void indexSet$slow(var a, var index, var value) { | |
| 310 if (isJsArray(a)) { | |
| 311 if (index is !int) { | |
| 312 throw new ArgumentError(index); | |
| 313 } | |
| 314 if (index < 0 || index >= a.length) { | |
| 315 throw new RangeError.value(index); | |
| 316 } | |
| 317 checkMutable(a, 'indexed set'); | |
| 318 JS('void', r'#[#] = #', a, index, value); | |
| 319 return; | |
| 320 } | |
| 321 UNINTERCEPTED(a[index] = value); | |
| 322 } | |
| 323 | |
| 324 checkMutable(list, reason) { | 250 checkMutable(list, reason) { |
| 325 if (JS('bool', r'!!(#.immutable$list)', list)) { | 251 if (JS('bool', r'!!(#.immutable$list)', list)) { |
| 326 throw new UnsupportedError(reason); | 252 throw new UnsupportedError(reason); |
| 327 } | 253 } |
| 328 } | 254 } |
| 329 | 255 |
| 330 checkGrowable(list, reason) { | 256 checkGrowable(list, reason) { |
| 331 if (JS('bool', r'!!(#.fixed$length)', list)) { | 257 if (JS('bool', r'!!(#.fixed$length)', list)) { |
| 332 throw new UnsupportedError(reason); | 258 throw new UnsupportedError(reason); |
| 333 } | 259 } |
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| 1741 if (len != t.length) return false; | 1667 if (len != t.length) return false; |
| 1742 for (int i = 1; i < len; i++) { | 1668 for (int i = 1; i < len; i++) { |
| 1743 if (!isSubtype(s[i], t[i])) { | 1669 if (!isSubtype(s[i], t[i])) { |
| 1744 return false; | 1670 return false; |
| 1745 } | 1671 } |
| 1746 } | 1672 } |
| 1747 return true; | 1673 return true; |
| 1748 } | 1674 } |
| 1749 | 1675 |
| 1750 createRuntimeType(String name) => new TypeImpl(name); | 1676 createRuntimeType(String name) => new TypeImpl(name); |
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