WeakMapConstructor.cpp [plain text]
#include "config.h"
#include "WeakMapConstructor.h"
#include "Error.h"
#include "IteratorOperations.h"
#include "JSCInlines.h"
#include "JSGlobalObject.h"
#include "JSObjectInlines.h"
#include "JSWeakMap.h"
#include "WeakMapPrototype.h"
namespace JSC {
const ClassInfo WeakMapConstructor::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(WeakMapConstructor) };
void WeakMapConstructor::finishCreation(VM& vm, WeakMapPrototype* prototype)
{
Base::finishCreation(vm, prototype->classInfo(vm)->className);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, prototype, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), PropertyAttribute::DontEnum | PropertyAttribute::ReadOnly);
}
static EncodedJSValue JSC_HOST_CALL callWeakMap(ExecState*);
static EncodedJSValue JSC_HOST_CALL constructWeakMap(ExecState*);
WeakMapConstructor::WeakMapConstructor(VM& vm, Structure* structure)
: Base(vm, structure, callWeakMap, constructWeakMap)
{
}
static EncodedJSValue JSC_HOST_CALL callWeakMap(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, scope, "WeakMap"));
}
static EncodedJSValue JSC_HOST_CALL constructWeakMap(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSGlobalObject* globalObject = asInternalFunction(exec->jsCallee())->globalObject();
Structure* weakMapStructure = InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->weakMapStructure());
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSWeakMap* weakMap = JSWeakMap::create(vm, weakMapStructure);
JSValue iterable = exec->argument(0);
if (iterable.isUndefinedOrNull())
return JSValue::encode(weakMap);
JSValue adderFunction = weakMap->JSObject::get(exec, vm.propertyNames->set);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
CallData adderFunctionCallData;
CallType adderFunctionCallType = getCallData(adderFunction, adderFunctionCallData);
if (adderFunctionCallType == CallType::None)
return JSValue::encode(throwTypeError(exec, scope));
scope.release();
forEachInIterable(exec, iterable, [&](VM& vm, ExecState* exec, JSValue nextItem) {
auto scope = DECLARE_THROW_SCOPE(vm);
if (!nextItem.isObject()) {
throwTypeError(exec, scope);
return;
}
JSValue key = nextItem.get(exec, static_cast<unsigned>(0));
RETURN_IF_EXCEPTION(scope, void());
JSValue value = nextItem.get(exec, static_cast<unsigned>(1));
RETURN_IF_EXCEPTION(scope, void());
MarkedArgumentBuffer arguments;
arguments.append(key);
arguments.append(value);
ASSERT(!arguments.hasOverflowed());
scope.release();
call(exec, adderFunction, adderFunctionCallType, adderFunctionCallData, weakMap, arguments);
});
return JSValue::encode(weakMap);
}
}