MapConstructor.cpp [plain text]
#include "config.h"
#include "MapConstructor.h"
#include "Error.h"
#include "GetterSetter.h"
#include "IteratorOperations.h"
#include "JSCInlines.h"
#include "JSGlobalObject.h"
#include "JSMap.h"
#include "JSObjectInlines.h"
#include "MapPrototype.h"
namespace JSC {
const ClassInfo MapConstructor::s_info = { "Function", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(MapConstructor) };
void MapConstructor::finishCreation(VM& vm, MapPrototype* mapPrototype, GetterSetter* speciesSymbol)
{
Base::finishCreation(vm, mapPrototype->classInfo(vm)->className);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, mapPrototype, DontEnum | DontDelete | ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), DontEnum | ReadOnly);
putDirectNonIndexAccessor(vm, vm.propertyNames->speciesSymbol, speciesSymbol, Accessor | ReadOnly | DontEnum);
}
static EncodedJSValue JSC_HOST_CALL callMap(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, scope, "Map"));
}
static EncodedJSValue JSC_HOST_CALL constructMap(ExecState* exec)
{
VM& vm = exec->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSGlobalObject* globalObject = asInternalFunction(exec->jsCallee())->globalObject();
Structure* mapStructure = InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->mapStructure());
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSValue iterable = exec->argument(0);
if (iterable.isUndefinedOrNull())
return JSValue::encode(JSMap::create(exec, vm, mapStructure));
if (isJSMap(iterable)) {
JSMap* iterableMap = jsCast<JSMap*>(iterable);
if (iterableMap->canCloneFastAndNonObservable(mapStructure))
return JSValue::encode(iterableMap->clone(exec, vm, mapStructure));
}
JSMap* map = JSMap::create(exec, vm, mapStructure);
RETURN_IF_EXCEPTION(scope, encodedJSValue());
JSValue adderFunction = map->JSObject::get(exec, exec->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);
scope.release();
call(exec, adderFunction, adderFunctionCallType, adderFunctionCallData, map, arguments);
});
return JSValue::encode(map);
}
ConstructType MapConstructor::getConstructData(JSCell*, ConstructData& constructData)
{
constructData.native.function = constructMap;
return ConstructType::Host;
}
CallType MapConstructor::getCallData(JSCell*, CallData& callData)
{
callData.native.function = callMap;
return CallType::Host;
}
}