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LibJS: Implement Promise.allSettled on the Promise constructor

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Timothy Flynn 2021-08-21 17:00:48 -04:00 • committed by Linus Groh
parent 4dffa40a8d
commit 949f294444
5 changed files with 266 additions and 2 deletions
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56
Userland/Libraries/LibJS/Runtime/PromiseConstructor.cpp
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@ -151,6 +151,33 @@ static Value perform_promise_all(GlobalObject& global_object, Object& iterator_r
});
}
// 27.2.4.2.1 PerformPromiseAllSettled ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseallsettled
static Value perform_promise_all_settled(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
auto& vm = global_object.vm();
return perform_promise_common(
global_object, iterator_record, constructor, result_capability, promise_resolve,
[&](PromiseValueList& values) -> Value {
auto values_array = Array::create_from(global_object, values.values);
(void)vm.call(*result_capability.resolve, js_undefined(), values_array);
if (vm.exception())
return {};
return result_capability.promise;
},
[&](PromiseValueList& values, RemainingElements& remaining_elements_count, Value next_promise, size_t index) {
auto* on_fulfilled = PromiseAllSettledResolveElementFunction::create(global_object, index, values, result_capability, remaining_elements_count);
on_fulfilled->define_direct_property(vm.names.name, js_string(vm, String::empty()), Attribute::Configurable);
auto* on_rejected = PromiseAllSettledRejectElementFunction::create(global_object, index, values, result_capability, remaining_elements_count);
on_rejected->define_direct_property(vm.names.name, js_string(vm, String::empty()), Attribute::Configurable);
(void)next_promise.invoke(global_object, vm.names.then, on_fulfilled, on_rejected);
});
}
// 27.2.4.3.1 PerformPromiseAny ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseany
static Value perform_promise_any(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
@ -190,9 +217,9 @@ void PromiseConstructor::initialize(GlobalObject& global_object)
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function(vm.names.all, all, 1, attr);
define_native_function(vm.names.allSettled, all_settled, 1, attr);
define_native_function(vm.names.any, any, 1, attr);
// TODO: Implement these functions below and uncomment this.
// define_native_function(vm.names.allSettled, all_settled, 1, attr);
// define_native_function(vm.names.race, race, 1, attr);
define_native_function(vm.names.reject, reject, 1, attr);
define_native_function(vm.names.resolve, resolve, 1, attr);
@ -271,7 +298,32 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::all)
// 27.2.4.2 Promise.allSettled ( iterable ), https://tc39.es/ecma262/#sec-promise.allsettled
JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::all_settled)
{
TODO();
auto* constructor = vm.this_value(global_object).to_object(global_object);
if (!constructor)
return {};
auto promise_capability = new_promise_capability(global_object, constructor);
if (vm.exception())
return {};
auto promise_resolve = get_promise_resolve(global_object, constructor);
if (auto abrupt = if_abrupt_reject_promise(global_object, promise_resolve, promise_capability); abrupt.has_value())
return abrupt.value();
auto iterator_record = get_iterator(global_object, vm.argument(0));
if (auto abrupt = if_abrupt_reject_promise(global_object, iterator_record, promise_capability); abrupt.has_value())
return abrupt.value();
auto result = perform_promise_all_settled(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
if (vm.exception()) {
if (!iterator_record_is_complete(global_object, *iterator_record))
iterator_close(*iterator_record);
auto abrupt = if_abrupt_reject_promise(global_object, result, promise_capability);
return abrupt.value();
}
return result;
}
// 27.2.4.3 Promise.any ( iterable ), https://tc39.es/ecma262/#sec-promise.any