| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| "use strict"; |
| |
| // This file relies on the fact that the following declaration has been made |
| // in runtime.js: |
| // var $Array = global.Array; |
| |
| var $Symbol = global.Symbol; |
| |
| // ------------------------------------------------------------------- |
| |
| function SymbolConstructor(x) { |
| var value = |
| IS_SYMBOL(x) ? x : %CreateSymbol(IS_UNDEFINED(x) ? x : ToString(x)); |
| if (%_IsConstructCall()) { |
| %_SetValueOf(this, value); |
| } else { |
| return value; |
| } |
| } |
| |
| function SymbolGetName() { |
| var symbol = IS_SYMBOL_WRAPPER(this) ? %_ValueOf(this) : this; |
| if (!IS_SYMBOL(symbol)) { |
| throw MakeTypeError( |
| 'incompatible_method_receiver', ["Symbol.prototype.name", this]); |
| } |
| return %SymbolName(symbol); |
| } |
| |
| function SymbolToString() { |
| throw MakeTypeError('symbol_to_string'); |
| } |
| |
| function SymbolValueOf() { |
| // NOTE: Both Symbol objects and values can enter here as |
| // 'this'. This is not as dictated by ECMA-262. |
| if (!IS_SYMBOL(this) && !IS_SYMBOL_WRAPPER(this)) { |
| throw MakeTypeError( |
| 'incompatible_method_receiver', ["Symbol.prototype.valueOf", this]); |
| } |
| return %_ValueOf(this); |
| } |
| |
| //------------------------------------------------------------------- |
| |
| function SetUpSymbol() { |
| %CheckIsBootstrapping(); |
| |
| %SetCode($Symbol, SymbolConstructor); |
| %FunctionSetPrototype($Symbol, new $Symbol()); |
| %SetProperty($Symbol.prototype, "constructor", $Symbol, DONT_ENUM); |
| |
| InstallGetter($Symbol.prototype, "name", SymbolGetName); |
| InstallFunctions($Symbol.prototype, DONT_ENUM, $Array( |
| "toString", SymbolToString, |
| "valueOf", SymbolValueOf |
| )); |
| } |
| |
| SetUpSymbol(); |