MapConstructor.cpp [plain text]
#include "config.h"
#include "MapConstructor.h"
#include "Error.h"
#include "GetterSetter.h"
#include "IteratorOperations.h"
#include "JSCJSValueInlines.h"
#include "JSCellInlines.h"
#include "JSGlobalObject.h"
#include "JSMap.h"
#include "MapPrototype.h"
#include "StructureInlines.h"
namespace JSC {
const ClassInfo MapConstructor::s_info = { "Function", &Base::s_info, 0, CREATE_METHOD_TABLE(MapConstructor) };
void MapConstructor::finishCreation(VM& vm, MapPrototype* mapPrototype, GetterSetter* speciesSymbol)
{
Base::finishCreation(vm, mapPrototype->classInfo()->className);
putDirectWithoutTransition(vm, vm.propertyNames->prototype, mapPrototype, DontEnum | DontDelete | ReadOnly);
putDirectWithoutTransition(vm, vm.propertyNames->length, jsNumber(0), ReadOnly | DontEnum | DontDelete);
putDirectNonIndexAccessor(vm, vm.propertyNames->speciesSymbol, speciesSymbol, Accessor | ReadOnly | DontEnum);
}
static EncodedJSValue JSC_HOST_CALL callMap(ExecState* exec)
{
return JSValue::encode(throwConstructorCannotBeCalledAsFunctionTypeError(exec, "Map"));
}
static EncodedJSValue JSC_HOST_CALL constructMap(ExecState* exec)
{
JSGlobalObject* globalObject = asInternalFunction(exec->callee())->globalObject();
Structure* mapStructure = InternalFunction::createSubclassStructure(exec, exec->newTarget(), globalObject->mapStructure());
if (exec->hadException())
return JSValue::encode(JSValue());
JSMap* map = JSMap::create(exec, mapStructure);
JSValue iterable = exec->argument(0);
if (iterable.isUndefinedOrNull())
return JSValue::encode(map);
JSValue adderFunction = map->JSObject::get(exec, exec->propertyNames().set);
if (exec->hadException())
return JSValue::encode(jsUndefined());
CallData adderFunctionCallData;
CallType adderFunctionCallType = getCallData(adderFunction, adderFunctionCallData);
if (adderFunctionCallType == CallType::None)
return JSValue::encode(throwTypeError(exec));
JSValue iteratorFunction = iterable.get(exec, exec->propertyNames().iteratorSymbol);
if (exec->hadException())
return JSValue::encode(jsUndefined());
CallData iteratorFunctionCallData;
CallType iteratorFunctionCallType = getCallData(iteratorFunction, iteratorFunctionCallData);
if (iteratorFunctionCallType == CallType::None)
return JSValue::encode(throwTypeError(exec));
ArgList iteratorFunctionArguments;
JSValue iterator = call(exec, iteratorFunction, iteratorFunctionCallType, iteratorFunctionCallData, iterable, iteratorFunctionArguments);
if (exec->hadException())
return JSValue::encode(jsUndefined());
if (!iterator.isObject())
return JSValue::encode(throwTypeError(exec));
while (true) {
JSValue next = iteratorStep(exec, iterator);
if (exec->hadException())
return JSValue::encode(jsUndefined());
if (next.isFalse())
return JSValue::encode(map);
JSValue nextItem = iteratorValue(exec, next);
if (exec->hadException())
return JSValue::encode(jsUndefined());
if (!nextItem.isObject()) {
throwTypeError(exec);
iteratorClose(exec, iterator);
return JSValue::encode(jsUndefined());
}
JSValue key = nextItem.get(exec, static_cast<unsigned>(0));
if (exec->hadException()) {
iteratorClose(exec, iterator);
return JSValue::encode(jsUndefined());
}
JSValue value = nextItem.get(exec, static_cast<unsigned>(1));
if (exec->hadException()) {
iteratorClose(exec, iterator);
return JSValue::encode(jsUndefined());
}
MarkedArgumentBuffer arguments;
arguments.append(key);
arguments.append(value);
call(exec, adderFunction, adderFunctionCallType, adderFunctionCallData, map, arguments);
if (exec->hadException()) {
iteratorClose(exec, iterator);
return JSValue::encode(jsUndefined());
}
}
RELEASE_ASSERT_NOT_REACHED();
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;
}
}