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| 1 // Copyright 2013 the V8 project authors. All rights reserved. | 1 // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 // Expects following symbols to be set in the bootstrapper during genesis: | 5 // Expects following symbols to be set in the bootstrapper during genesis: |
| 6 // - symbolHasInstance | 6 // - symbolHasInstance |
| 7 // - symbolIsConcatSpreadable | 7 // - symbolIsConcatSpreadable |
| 8 // - symbolIsRegExp | 8 // - symbolIsRegExp |
| 9 // - symbolIterator | 9 // - symbolIterator |
| 10 // - symbolToStringTag | 10 // - symbolToStringTag |
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| 27 if (%_IsConstructCall()) { | 27 if (%_IsConstructCall()) { |
| 28 throw MakeTypeError('not_constructor', ["Symbol"]); | 28 throw MakeTypeError('not_constructor', ["Symbol"]); |
| 29 } | 29 } |
| 30 // NOTE: Passing in a Symbol value will throw on ToString(). | 30 // NOTE: Passing in a Symbol value will throw on ToString(). |
| 31 return %CreateSymbol(IS_UNDEFINED(x) ? x : ToString(x)); | 31 return %CreateSymbol(IS_UNDEFINED(x) ? x : ToString(x)); |
| 32 } | 32 } |
| 33 | 33 |
| 34 | 34 |
| 35 function SymbolToString() { | 35 function SymbolToString() { |
| 36 if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { | 36 if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { |
| 37 throw MakeTypeError( | 37 throw MakeTypeError(kIncompatibleMethodReceiver, |
| 38 'incompatible_method_receiver', ["Symbol.prototype.toString", this]); | 38 "Symbol.prototype.toString", this); |
| 39 } | 39 } |
| 40 var description = %SymbolDescription(%_ValueOf(this)); | 40 var description = %SymbolDescription(%_ValueOf(this)); |
| 41 return "Symbol(" + (IS_UNDEFINED(description) ? "" : description) + ")"; | 41 return "Symbol(" + (IS_UNDEFINED(description) ? "" : description) + ")"; |
| 42 } | 42 } |
| 43 | 43 |
| 44 | 44 |
| 45 function SymbolValueOf() { | 45 function SymbolValueOf() { |
| 46 if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { | 46 if (!(IS_SYMBOL(this) || IS_SYMBOL_WRAPPER(this))) { |
| 47 throw MakeTypeError( | 47 throw MakeTypeError(kIncompatibleMethodReceiver, |
| 48 'incompatible_method_receiver', ["Symbol.prototype.valueOf", this]); | 48 "Symbol.prototype.valueOf", this); |
| 49 } | 49 } |
| 50 return %_ValueOf(this); | 50 return %_ValueOf(this); |
| 51 } | 51 } |
| 52 | 52 |
| 53 | 53 |
| 54 function SymbolFor(key) { | 54 function SymbolFor(key) { |
| 55 key = TO_STRING_INLINE(key); | 55 key = TO_STRING_INLINE(key); |
| 56 var registry = %SymbolRegistry(); | 56 var registry = %SymbolRegistry(); |
| 57 if (IS_UNDEFINED(registry.for[key])) { | 57 if (IS_UNDEFINED(registry.for[key])) { |
| 58 var symbol = %CreateSymbol(key); | 58 var symbol = %CreateSymbol(key); |
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| 110 "valueOf", SymbolValueOf | 110 "valueOf", SymbolValueOf |
| 111 ]); | 111 ]); |
| 112 | 112 |
| 113 InstallFunctions(GlobalObject, DONT_ENUM, [ | 113 InstallFunctions(GlobalObject, DONT_ENUM, [ |
| 114 "getOwnPropertySymbols", ObjectGetOwnPropertySymbols | 114 "getOwnPropertySymbols", ObjectGetOwnPropertySymbols |
| 115 ]); | 115 ]); |
| 116 | 116 |
| 117 $symbolToString = SymbolToString; | 117 $symbolToString = SymbolToString; |
| 118 | 118 |
| 119 })(); | 119 })(); |
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