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Issue 7620012: Rollback of r8903 (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Created 9 years, 4 months ago
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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', [F]); 369 throw %MakeTypeError('instanceof_function_expected', [V]);
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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