blob: ed9fa80dc7ff55616674e9152430f13674665cbb [file] [log] [blame]
/*
* 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 "SymbolConstructor.h"
#include "Error.h"
#include "JSCInlines.h"
#include "JSGlobalObject.h"
#include "Symbol.h"
#include "SymbolPrototype.h"
#include <wtf/text/SymbolRegistry.h>
namespace JSC {
static EncodedJSValue JSC_HOST_CALL symbolConstructorFor(ExecState*);
static EncodedJSValue JSC_HOST_CALL symbolConstructorKeyFor(ExecState*);
}
#include "SymbolConstructor.lut.h"
namespace JSC {
STATIC_ASSERT_IS_TRIVIALLY_DESTRUCTIBLE(SymbolConstructor);
const ClassInfo SymbolConstructor::s_info = { "Function", &Base::s_info, &symbolConstructorTable, nullptr, CREATE_METHOD_TABLE(SymbolConstructor) };
/* Source for SymbolConstructor.lut.h
@begin symbolConstructorTable
for symbolConstructorFor DontEnum|Function 1
keyFor symbolConstructorKeyFor DontEnum|Function 1
@end
*/
static EncodedJSValue JSC_HOST_CALL callSymbol(ExecState*);
SymbolConstructor::SymbolConstructor(VM& vm, Structure* structure)
: InternalFunction(vm, structure, callSymbol, nullptr)
{
}
#define INITIALIZE_WELL_KNOWN_SYMBOLS(name) \
putDirectWithoutTransition(vm, Identifier::fromString(vm, #name), Symbol::create(vm, static_cast<SymbolImpl&>(*vm.propertyNames->name##Symbol.impl())), PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
void SymbolConstructor::finishCreation(VM& vm, SymbolPrototype* prototype)
{
Base::finishCreation(vm, vm.propertyNames->Symbol.string(), NameVisibility::Visible, NameAdditionMode::WithoutStructureTransition);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), PropertyAttribute::ReadOnly | PropertyAttribute::DontEnum);
JSC_COMMON_PRIVATE_IDENTIFIERS_EACH_WELL_KNOWN_SYMBOL(INITIALIZE_WELL_KNOWN_SYMBOLS)
}
// ------------------------------ Functions ---------------------------
static EncodedJSValue JSC_HOST_CALL callSymbol(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue description = exec->argument(0);
if (description.isUndefined())
return JSValue::encode(Symbol::create(vm));
String string = description.toWTFString(exec);
RETURN_IF_EXCEPTION(scope, { });
return JSValue::encode(Symbol::createWithDescription(vm, string));
}
EncodedJSValue JSC_HOST_CALL symbolConstructorFor(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSString* stringKey = exec->argument(0).toString(exec);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
String string = stringKey->value(exec);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
return JSValue::encode(Symbol::create(exec->vm(), exec->vm().symbolRegistry().symbolForKey(string)));
}
const ASCIILiteral SymbolKeyForTypeError { "Symbol.keyFor requires that the first argument be a symbol"_s };
EncodedJSValue JSC_HOST_CALL symbolConstructorKeyFor(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSValue symbolValue = exec->argument(0);
if (!symbolValue.isSymbol())
return JSValue::encode(throwTypeError(exec, scope, SymbolKeyForTypeError));
PrivateName privateName = asSymbol(symbolValue)->privateName();
SymbolImpl& uid = privateName.uid();
if (!uid.symbolRegistry())
return JSValue::encode(jsUndefined());
ASSERT(uid.symbolRegistry() == &vm.symbolRegistry());
return JSValue::encode(jsString(vm, &uid));
}
} // namespace JSC