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// Copyright 2019 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
namespace symbol {
extern runtime SymbolDescriptiveString(implicit context: Context)(Symbol):
String;
transitioning macro ThisSymbolValue(implicit context: Context)(
receiver: JSAny, method: constexpr string): Symbol {
return UnsafeCast<Symbol>(
ToThisValue(receiver, PrimitiveType::kSymbol, method));
}
// ES #sec-symbol.prototype.description
transitioning javascript builtin SymbolPrototypeDescriptionGetter(
js-implicit context: NativeContext, receiver: JSAny)(): String|Undefined {
// 1. Let s be the this value.
// 2. Let sym be ? thisSymbolValue(s).
const sym: Symbol = ThisSymbolValue(receiver, 'Symbol.prototype.description');
// 3. Return sym.[[Description]].
return sym.description;
}
// ES6 #sec-symbol.prototype-@@toprimitive
transitioning javascript builtin SymbolPrototypeToPrimitive(
js-implicit context: NativeContext, receiver: JSAny)(_hint: JSAny): JSAny {
// 1. Return ? thisSymbolValue(this value).
return ThisSymbolValue(receiver, 'Symbol.prototype [ @@toPrimitive ]');
}
// ES6 #sec-symbol.prototype.tostring
transitioning javascript builtin SymbolPrototypeToString(
js-implicit context: NativeContext, receiver: JSAny)(): JSAny {
// 1. Let sym be ? thisSymbolValue(this value).
const sym: Symbol = ThisSymbolValue(receiver, 'Symbol.prototype.toString');
// 2. Return SymbolDescriptiveString(sym).
return SymbolDescriptiveString(sym);
}
// ES6 #sec-symbol.prototype.valueof
transitioning javascript builtin SymbolPrototypeValueOf(
js-implicit context: NativeContext, receiver: JSAny)(): JSAny {
// 1. Return ? thisSymbolValue(this value).
return ThisSymbolValue(receiver, 'Symbol.prototype.valueOf');
}
}
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