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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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