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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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347 function DELETE(key, strict) { | 347 function DELETE(key, strict) { |
348 return %DeleteProperty(%ToObject(this), %ToString(key), strict); | 348 return %DeleteProperty(%ToObject(this), %ToString(key), strict); |
349 } | 349 } |
350 | 350 |
351 | 351 |
352 // ECMA-262, section 11.8.7, page 54. | 352 // ECMA-262, section 11.8.7, page 54. |
353 function IN(x) { | 353 function IN(x) { |
354 if (!IS_SPEC_OBJECT(x)) { | 354 if (!IS_SPEC_OBJECT(x)) { |
355 throw %MakeTypeError('invalid_in_operator_use', [this, x]); | 355 throw %MakeTypeError('invalid_in_operator_use', [this, x]); |
356 } | 356 } |
357 return %_IsNonNegativeSmi(this) ? %HasElement(x, this) : %HasProperty(x, %ToSt
ring(this)); | 357 return %_IsNonNegativeSmi(this) && !%IsJSProxy(x) ? |
| 358 %HasElement(x, this) : %HasProperty(x, %ToString(this)); |
358 } | 359 } |
359 | 360 |
360 | 361 |
361 // ECMA-262, section 11.8.6, page 54. To make the implementation more | 362 // ECMA-262, section 11.8.6, page 54. To make the implementation more |
362 // efficient, the return value should be zero if the 'this' is an | 363 // efficient, the return value should be zero if the 'this' is an |
363 // instance of F, and non-zero if not. This makes it possible to avoid | 364 // instance of F, and non-zero if not. This makes it possible to avoid |
364 // an expensive ToBoolean conversion in the generated code. | 365 // an expensive ToBoolean conversion in the generated code. |
365 function INSTANCE_OF(F) { | 366 function INSTANCE_OF(F) { |
366 var V = this; | 367 var V = this; |
367 if (!IS_FUNCTION(F)) { | 368 if (!IS_FUNCTION(F)) { |
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640 throw %MakeTypeError('cannot_convert_to_primitive', []); | 641 throw %MakeTypeError('cannot_convert_to_primitive', []); |
641 } | 642 } |
642 | 643 |
643 | 644 |
644 // NOTE: Setting the prototype for Array must take place as early as | 645 // NOTE: Setting the prototype for Array must take place as early as |
645 // possible due to code generation for array literals. When | 646 // possible due to code generation for array literals. When |
646 // generating code for a array literal a boilerplate array is created | 647 // generating code for a array literal a boilerplate array is created |
647 // that is cloned when running the code. It is essential that the | 648 // that is cloned when running the code. It is essential that the |
648 // boilerplate gets the right prototype. | 649 // boilerplate gets the right prototype. |
649 %FunctionSetPrototype($Array, new $Array(0)); | 650 %FunctionSetPrototype($Array, new $Array(0)); |
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