mirror of
https://github.com/RGBCube/serenity
synced 2025-07-27 13:47:35 +00:00
LibJS: Implement %IteratorHelperPrototype%.return
This commit is contained in:
parent
57e7112a20
commit
0e63d04a35
6 changed files with 263 additions and 6 deletions
|
@ -44,16 +44,28 @@ JS_DEFINE_NATIVE_FUNCTION(IteratorHelperPrototype::return_)
|
|||
{
|
||||
// 1. Let O be this value.
|
||||
// 2. Perform ? RequireInternalSlot(O, [[UnderlyingIterator]]).
|
||||
auto iterator = TRY(typed_this_object(vm));
|
||||
|
||||
// 3. Assert: O has a [[GeneratorState]] slot.
|
||||
// 4. If O.[[GeneratorState]] is suspendedStart, then
|
||||
// a. Set O.[[GeneratorState]] to completed.
|
||||
// b. NOTE: Once a generator enters the completed state it never leaves it and its associated execution context is never resumed. Any execution state associated with O can be discarded at this point.
|
||||
// c. Perform ? IteratorClose(O.[[UnderlyingIterator]], NormalCompletion(unused)).
|
||||
// d. Return CreateIterResultObject(undefined, true).
|
||||
if (iterator->generator_state() == GeneratorObject::GeneratorState::SuspendedStart) {
|
||||
// a. Set O.[[GeneratorState]] to completed.
|
||||
iterator->set_generator_state(GeneratorObject::GeneratorState::Completed);
|
||||
|
||||
// b. NOTE: Once a generator enters the completed state it never leaves it and its associated execution context is never resumed. Any execution state associated with O can be discarded at this point.
|
||||
|
||||
// c. Perform ? IteratorClose(O.[[UnderlyingIterator]], NormalCompletion(unused)).
|
||||
TRY(iterator_close(vm, iterator->underlying_iterator(), normal_completion({})));
|
||||
|
||||
// d. Return CreateIterResultObject(undefined, true).
|
||||
return create_iterator_result_object(vm, js_undefined(), true);
|
||||
}
|
||||
|
||||
// 5. Let C be Completion { [[Type]]: return, [[Value]]: undefined, [[Target]]: empty }.
|
||||
Completion completion { Completion::Type::Return, js_undefined(), {} };
|
||||
|
||||
// 6. Return ? GeneratorResumeAbrupt(O, C, "Iterator Helper").
|
||||
|
||||
return vm.throw_completion<InternalError>(ErrorType::NotImplemented, "IteratorHelper.prototype.return"sv);
|
||||
return TRY(iterator->resume_abrupt(vm, move(completion), "Iterator Helper"sv));
|
||||
}
|
||||
|
||||
}
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue