internal bool TryGetIterator(Realm realm, out IteratorInstance iterator, GeneratorKind hint = GeneratorKind.Sync, ICallable method = null)
{
var obj = TypeConverter.ToObject(realm, this);
if (method is null)
{
if (hint == GeneratorKind.Async)
{
method = obj.GetMethod(GlobalSymbolRegistry.AsyncIterator);
if (method is null)
{
var syncMethod = obj.GetMethod(GlobalSymbolRegistry.Iterator);
var syncIteratorRecord = obj.GetIterator(realm, GeneratorKind.Sync, syncMethod);
// TODO async CreateAsyncFromSyncIterator(syncIteratorRecord);
ExceptionHelper.ThrowNotImplementedException("async");
}
}
else
{
method = obj.GetMethod(GlobalSymbolRegistry.Iterator);
}
}
if (method is null)
{
iterator = null;
return(false);
}
var iteratorResult = method.Call(obj, Arguments.Empty) as ObjectInstance;
if (iteratorResult is null)
{
ExceptionHelper.ThrowTypeError(realm, "Result of the Symbol.iterator method is not an object");
}
if (iteratorResult is IteratorInstance i)
{
iterator = i;
}
else
{
iterator = new IteratorInstance.ObjectIterator(iteratorResult);
}
return(true);
}
internal bool TryGetIterator(Engine engine, out IIterator iterator)
{
var objectInstance = TypeConverter.ToObject(engine, this);
if (!objectInstance.TryGetValue(GlobalSymbolRegistry.Iterator, out var value) ||
!(value is ICallable callable))
{
iterator = null;
return(false);
}
var obj = callable.Call(this, Arguments.Empty) as ObjectInstance
?? ExceptionHelper.ThrowTypeError <ObjectInstance>(engine, "Result of the Symbol.iterator method is not an object");
if (obj is IIterator i)
{
iterator = i;
}
else
{
iterator = new IteratorInstance.ObjectIterator(obj);
}
return(true);
}
