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LibJS: Convert all four PerformPromise* AOs to ThrowCompletionOr

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Timothy Flynn 2021-10-20 22:55:17 -04:00 • committed by Linus Groh
parent 4fb948d8e7
commit f8e46ec296
1 changed files with 31 additions and 48 deletions
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79
Userland/Libraries/LibJS/Runtime/PromiseConstructor.cpp
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@ -69,9 +69,9 @@ static void set_iterator_record_complete(GlobalObject& global_object, Object& it
}
using EndOfElementsCallback = Function<ThrowCompletionOr<Value>(PromiseValueList&)>;
using InvokeElementFunctionCallback = Function<void(PromiseValueList&, RemainingElements&, Value, size_t)>;
using InvokeElementFunctionCallback = Function<ThrowCompletionOr<Value>(PromiseValueList&, RemainingElements&, Value, size_t)>;
static Value perform_promise_common(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve, EndOfElementsCallback end_of_list, InvokeElementFunctionCallback invoke_element_function)
static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve, EndOfElementsCallback end_of_list, InvokeElementFunctionCallback invoke_element_function)
{
auto& vm = global_object.vm();
@ -86,43 +86,38 @@ static Value perform_promise_common(GlobalObject& global_object, Object& iterato
auto next_or_error = iterator_step(global_object, iterator_record);
if (next_or_error.is_throw_completion()) {
set_iterator_record_complete(global_object, iterator_record);
return {};
return next_or_error.release_error();
}
auto* next = next_or_error.release_value();
if (!next) {
set_iterator_record_complete(global_object, iterator_record);
if (vm.exception())
return {};
if (--remaining_elements_count->value == 0)
return TRY_OR_DISCARD(end_of_list(*values));
return TRY(end_of_list(*values));
return result_capability.promise;
}
auto next_value_or_error = iterator_value(global_object, *next);
if (next_value_or_error.is_throw_completion()) {
set_iterator_record_complete(global_object, iterator_record);
return {};
return next_value_or_error.release_error();
}
auto next_value = next_value_or_error.release_value();
values->values().append(js_undefined());
auto next_promise = TRY_OR_DISCARD(vm.call(promise_resolve.as_function(), constructor, next_value));
auto next_promise = TRY(vm.call(promise_resolve.as_function(), constructor, next_value));
++remaining_elements_count->value;
invoke_element_function(*values, *remaining_elements_count, next_promise, index);
if (vm.exception())
return {};
TRY(invoke_element_function(*values, *remaining_elements_count, next_promise, index));
++index;
}
}
// 27.2.4.1.2 PerformPromiseAll ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseall
static Value perform_promise_all(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
static ThrowCompletionOr<Value> perform_promise_all(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
auto& vm = global_object.vm();
@ -139,12 +134,12 @@ static Value perform_promise_all(GlobalObject& global_object, Object& iterator_r
auto* on_fulfilled = PromiseAllResolveElementFunction::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);
(void)next_promise.invoke(global_object, vm.names.then, on_fulfilled, result_capability.reject);
return next_promise.invoke(global_object, vm.names.then, on_fulfilled, result_capability.reject);
});
}
// 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)
static ThrowCompletionOr<Value> perform_promise_all_settled(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
auto& vm = global_object.vm();
@ -164,12 +159,12 @@ static Value perform_promise_all_settled(GlobalObject& global_object, Object& it
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);
return 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)
static ThrowCompletionOr<Value> perform_promise_any(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
auto& vm = global_object.vm();
@ -188,12 +183,12 @@ static Value perform_promise_any(GlobalObject& global_object, Object& iterator_r
auto* on_rejected = PromiseAnyRejectElementFunction::create(global_object, index, errors, 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, result_capability.resolve, on_rejected);
return next_promise.invoke(global_object, vm.names.then, result_capability.resolve, on_rejected);
});
}
// 27.2.4.5.1 PerformPromiseRace ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiserace
static Value perform_promise_race(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
static ThrowCompletionOr<Value> perform_promise_race(GlobalObject& global_object, Object& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
{
auto& vm = global_object.vm();
@ -203,7 +198,7 @@ static Value perform_promise_race(GlobalObject& global_object, Object& iterator_
return Value(result_capability.promise);
},
[&](PromiseValueList&, RemainingElements&, Value next_promise, size_t) {
(void)next_promise.invoke(global_object, vm.names.then, result_capability.resolve, result_capability.reject);
return next_promise.invoke(global_object, vm.names.then, result_capability.resolve, result_capability.reject);
});
}
@ -276,19 +271,16 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(PromiseConstructor::all)
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
auto result = perform_promise_all(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
if (auto* exception = vm.exception()) {
// FIXME: Once perform_promise_all returns a throw completion, pass that to iterator_close() instead.
auto result_error = throw_completion(exception->value());
if (result.is_error()) {
if (!iterator_record_is_complete(global_object, *iterator_record)) {
TemporaryClearException clear_exception(vm); // iterator_close() may invoke vm.call(), which VERIFYs no exception.
result_error = iterator_close(*iterator_record, move(result_error));
result = iterator_close(*iterator_record, result.release_error());
}
TRY_OR_REJECT(vm, promise_capability, result_error);
TRY_OR_REJECT(vm, promise_capability, result);
}
return result;
return result.release_value();
}
// 27.2.4.2 Promise.allSettled ( iterable ), https://tc39.es/ecma262/#sec-promise.allsettled
@ -304,19 +296,16 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(PromiseConstructor::all_settled)
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
auto result = perform_promise_all_settled(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
if (auto* exception = vm.exception()) {
// FIXME: Once perform_promise_all_settled returns a throw completion, pass that to iterator_close() instead.
auto result_error = throw_completion(exception->value());
if (result.is_error()) {
if (!iterator_record_is_complete(global_object, *iterator_record)) {
TemporaryClearException clear_exception(vm); // iterator_close() may invoke vm.call(), which VERIFYs no exception.
result_error = iterator_close(*iterator_record, move(result_error));
result = iterator_close(*iterator_record, result.release_error());
}
TRY_OR_REJECT(vm, promise_capability, result_error);
TRY_OR_REJECT(vm, promise_capability, result);
}
return result;
return result.release_value();
}
// 27.2.4.3 Promise.any ( iterable ), https://tc39.es/ecma262/#sec-promise.any
@ -332,19 +321,16 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(PromiseConstructor::any)
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
auto result = perform_promise_any(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
if (auto* exception = vm.exception()) {
// FIXME: Once perform_promise_any returns a throw completion, pass that to iterator_close() instead.
auto result_error = throw_completion(exception->value());
if (result.is_error()) {
if (!iterator_record_is_complete(global_object, *iterator_record)) {
TemporaryClearException clear_exception(vm); // iterator_close() may invoke vm.call(), which VERIFYs no exception.
result_error = iterator_close(*iterator_record, move(result_error));
result = iterator_close(*iterator_record, result.release_error());
}
TRY_OR_REJECT(vm, promise_capability, result_error);
TRY_OR_REJECT(vm, promise_capability, result);
}
return result;
return result.release_value();
}
// 27.2.4.5 Promise.race ( iterable ), https://tc39.es/ecma262/#sec-promise.race
@ -360,19 +346,16 @@ JS_DEFINE_OLD_NATIVE_FUNCTION(PromiseConstructor::race)
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
auto result = perform_promise_race(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
if (auto* exception = vm.exception()) {
// FIXME: Once perform_promise_race returns a throw completion, pass that to iterator_close() instead.
auto result_error = throw_completion(exception->value());
if (result.is_error()) {
if (!iterator_record_is_complete(global_object, *iterator_record)) {
TemporaryClearException clear_exception(vm);
result_error = iterator_close(*iterator_record, move(result_error)); // iterator_close() may invoke vm.call(), which VERIFYs no exception.
result = iterator_close(*iterator_record, result.release_error()); // iterator_close() may invoke vm.call(), which VERIFYs no exception.
}
TRY_OR_REJECT(vm, promise_capability, result_error);
TRY_OR_REJECT(vm, promise_capability, result);
}
return result;
return result.release_value();
}
// 27.2.4.6 Promise.reject ( r ), https://tc39.es/ecma262/#sec-promise.reject