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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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359 } | 359 } |
360 | 360 |
361 | 361 |
362 // 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 |
363 // 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 |
364 // 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 |
365 // an expensive ToBoolean conversion in the generated code. | 365 // an expensive ToBoolean conversion in the generated code. |
366 function INSTANCE_OF(F) { | 366 function INSTANCE_OF(F) { |
367 var V = this; | 367 var V = this; |
368 if (!IS_FUNCTION(F)) { | 368 if (!IS_FUNCTION(F)) { |
369 throw %MakeTypeError('instanceof_function_expected', [V]); | 369 throw %MakeTypeError('instanceof_function_expected', [F]); |
370 } | 370 } |
371 | 371 |
372 // If V is not an object, return false. | 372 // If V is not an object, return false. |
373 if (!IS_SPEC_OBJECT(V)) { | 373 if (!IS_SPEC_OBJECT(V)) { |
374 return 1; | 374 return 1; |
375 } | 375 } |
376 | 376 |
377 // Get the prototype of F; if it is not an object, throw an error. | 377 // Get the prototype of F; if it is not an object, throw an error. |
378 var O = F.prototype; | 378 var O = F.prototype; |
379 if (!IS_SPEC_OBJECT(O)) { | 379 if (!IS_SPEC_OBJECT(O)) { |
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641 throw %MakeTypeError('cannot_convert_to_primitive', []); | 641 throw %MakeTypeError('cannot_convert_to_primitive', []); |
642 } | 642 } |
643 | 643 |
644 | 644 |
645 // 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 |
646 // possible due to code generation for array literals. When | 646 // possible due to code generation for array literals. When |
647 // generating code for a array literal a boilerplate array is created | 647 // generating code for a array literal a boilerplate array is created |
648 // 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 |
649 // boilerplate gets the right prototype. | 649 // boilerplate gets the right prototype. |
650 %FunctionSetPrototype($Array, new $Array(0)); | 650 %FunctionSetPrototype($Array, new $Array(0)); |
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