| /* |
| * Copyright (C) 2012-2019 Apple Inc. All rights reserved. |
| * Copyright (C) 2015 Yusuke Suzuki <utatane.tea@gmail.com>. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. 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. |
| * |
| * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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. |
| */ |
| |
| #include "config.h" |
| #include "SymbolPrototype.h" |
| |
| #include "Error.h" |
| #include "JSCInlines.h" |
| #include "JSString.h" |
| #include "SymbolObject.h" |
| |
| namespace JSC { |
| |
| static EncodedJSValue JSC_HOST_CALL symbolProtoGetterDescription(JSGlobalObject*, CallFrame*); |
| static EncodedJSValue JSC_HOST_CALL symbolProtoFuncToString(JSGlobalObject*, CallFrame*); |
| static EncodedJSValue JSC_HOST_CALL symbolProtoFuncValueOf(JSGlobalObject*, CallFrame*); |
| |
| } |
| |
| #include "SymbolPrototype.lut.h" |
| |
| namespace JSC { |
| |
| const ClassInfo SymbolPrototype::s_info = { "Symbol", &Base::s_info, &symbolPrototypeTable, nullptr, CREATE_METHOD_TABLE(SymbolPrototype) }; |
| |
| /* Source for SymbolPrototype.lut.h |
| @begin symbolPrototypeTable |
| description symbolProtoGetterDescription DontEnum|Accessor 0 |
| toString symbolProtoFuncToString DontEnum|Function 0 |
| valueOf symbolProtoFuncValueOf DontEnum|Function 0 |
| @end |
| */ |
| |
| SymbolPrototype::SymbolPrototype(VM& vm, Structure* structure) |
| : Base(vm, structure) |
| { |
| } |
| |
| void SymbolPrototype::finishCreation(VM& vm, JSGlobalObject* globalObject) |
| { |
| Base::finishCreation(vm); |
| putDirectWithoutTransition(vm, vm.propertyNames->toStringTagSymbol, jsString(vm, "Symbol"), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly); |
| ASSERT(inherits(vm, info())); |
| |
| JSFunction* toPrimitiveFunction = JSFunction::create(vm, globalObject, 1, "[Symbol.toPrimitive]"_s, symbolProtoFuncValueOf, NoIntrinsic); |
| putDirectWithoutTransition(vm, vm.propertyNames->toPrimitiveSymbol, toPrimitiveFunction, PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly); |
| } |
| |
| // ------------------------------ Functions --------------------------- |
| |
| static const ASCIILiteral SymbolDescriptionTypeError { "Symbol.prototype.description requires that |this| be a symbol or a symbol object"_s }; |
| static const ASCIILiteral SymbolToStringTypeError { "Symbol.prototype.toString requires that |this| be a symbol or a symbol object"_s }; |
| static const ASCIILiteral SymbolValueOfTypeError { "Symbol.prototype.valueOf requires that |this| be a symbol or a symbol object"_s }; |
| |
| inline Symbol* tryExtractSymbol(VM& vm, JSValue thisValue) |
| { |
| if (thisValue.isSymbol()) |
| return asSymbol(thisValue); |
| |
| if (!thisValue.isObject()) |
| return nullptr; |
| JSObject* thisObject = asObject(thisValue); |
| if (!thisObject->inherits<SymbolObject>(vm)) |
| return nullptr; |
| return asSymbol(jsCast<SymbolObject*>(thisObject)->internalValue()); |
| } |
| |
| EncodedJSValue JSC_HOST_CALL symbolProtoGetterDescription(JSGlobalObject* globalObject, CallFrame* callFrame) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| Symbol* symbol = tryExtractSymbol(vm, callFrame->thisValue()); |
| if (!symbol) |
| return throwVMTypeError(callFrame, scope, SymbolDescriptionTypeError); |
| scope.release(); |
| const auto description = symbol->description(); |
| return JSValue::encode(description.isNull() ? jsUndefined() : jsString(vm, description)); |
| } |
| |
| EncodedJSValue JSC_HOST_CALL symbolProtoFuncToString(JSGlobalObject* globalObject, CallFrame* callFrame) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| Symbol* symbol = tryExtractSymbol(vm, callFrame->thisValue()); |
| if (!symbol) |
| return throwVMTypeError(callFrame, scope, SymbolToStringTypeError); |
| RELEASE_AND_RETURN(scope, JSValue::encode(jsNontrivialString(vm, symbol->descriptiveString()))); |
| } |
| |
| EncodedJSValue JSC_HOST_CALL symbolProtoFuncValueOf(JSGlobalObject* globalObject, CallFrame* callFrame) |
| { |
| VM& vm = globalObject->vm(); |
| auto scope = DECLARE_THROW_SCOPE(vm); |
| |
| Symbol* symbol = tryExtractSymbol(vm, callFrame->thisValue()); |
| if (!symbol) |
| return throwVMTypeError(callFrame, scope, SymbolValueOfTypeError); |
| |
| RELEASE_AND_RETURN(scope, JSValue::encode(symbol)); |
| } |
| |
| } // namespace JSC |