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https://github.com/RGBCube/serenity
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LibJS: Implement proper Iterator records
Instead of using plain objects as Iterator records, causes confusion about the object itself actually being its [[Iterator]] slot, and requires non-standard type conversion shenanigans fpr the [[NextValue]] and [[Done]] internal slots, implement a proper Iterator record struct and use it throughout. Also annotate the remaining Iterator AOs with spec comments while we're here.
This commit is contained in:
Linus Groh
parent
e141f1e976
commit
09a11fa6ea
17 changed files with 337 additions and 209 deletions
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@ -1135,8 +1135,7 @@ Completion ForAwaitOfStatement::loop_evaluation(Interpreter& interpreter, Global
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// NOTE: Perform step 7 from ForIn/OfHeadEvaluation. And since this is always async we only have to do step 7.d.
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// d. Return ? GetIterator(exprValue, iteratorHint).
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auto* iterator = TRY(get_iterator(global_object, rhs_result, IteratorHint::Async));
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VERIFY(iterator);
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auto iterator = TRY(get_iterator(global_object, rhs_result, IteratorHint::Async));
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auto& vm = interpreter.vm();
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@ -1155,15 +1154,12 @@ Completion ForAwaitOfStatement::loop_evaluation(Interpreter& interpreter, Global
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// 6. Repeat,
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while (true) {
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// NOTE: Since we don't have iterator records yet we have to extract the function first.
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auto next_method = TRY(iterator->get(vm.names.next));
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if (!next_method.is_function())
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return vm.throw_completion<TypeError>(global_object, ErrorType::IterableNextNotAFunction);
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// a. Let nextResult be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
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auto next_result = TRY(call(global_object, next_method, iterator));
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auto next_result = TRY(call(global_object, iterator.next_method, iterator.iterator));
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// b. If iteratorKind is async, set nextResult to ? Await(nextResult).
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next_result = TRY(await(global_object, next_result));
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// c. If Type(nextResult) is not Object, throw a TypeError exception.
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if (!next_result.is_object())
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return vm.throw_completion<TypeError>(global_object, ErrorType::IterableNextBadReturn);
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@ -1193,7 +1189,7 @@ Completion ForAwaitOfStatement::loop_evaluation(Interpreter& interpreter, Global
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auto status = result.update_empty(last_value);
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// 3. If iteratorKind is async, return ? AsyncIteratorClose(iteratorRecord, status).
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return async_iterator_close(*iterator, move(status));
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return async_iterator_close(global_object, iterator, move(status));
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}
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// o. If result.[[Value]] is not empty, set V to result.[[Value]].
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2021, Gunnar Beutner <gbeutner@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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@ -16,6 +16,7 @@
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#include <LibJS/Runtime/ECMAScriptFunctionObject.h>
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#include <LibJS/Runtime/Environment.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Iterator.h>
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#include <LibJS/Runtime/IteratorOperations.h>
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#include <LibJS/Runtime/RegExpObject.h>
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#include <LibJS/Runtime/Value.h>
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@ -132,19 +133,41 @@ void NewArray::execute_impl(Bytecode::Interpreter& interpreter) const
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interpreter.accumulator() = Array::create_from(interpreter.global_object(), elements);
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}
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// FIXME: Since the accumulator is a Value, we store an object there and have to convert back and forth between that an Iterator records. Not great.
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// Make sure to put this into the accumulator before the iterator object disappears from the stack to prevent the members from being GC'd.
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static Object* iterator_to_object(GlobalObject& global_object, Iterator iterator)
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{
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auto& vm = global_object.vm();
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auto* object = Object::create(global_object, nullptr);
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object->define_direct_property(vm.names.iterator, iterator.iterator, 0);
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object->define_direct_property(vm.names.next, iterator.next_method, 0);
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object->define_direct_property(vm.names.done, Value(iterator.done), 0);
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return object;
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}
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static Iterator object_to_iterator(GlobalObject& global_object, Object& object)
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{
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auto& vm = global_object.vm();
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return Iterator {
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.iterator = &MUST(object.get(vm.names.iterator)).as_object(),
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.next_method = MUST(object.get(vm.names.next)),
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.done = MUST(object.get(vm.names.done)).as_bool()
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};
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}
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void IteratorToArray::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto& global_object = interpreter.global_object();
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auto iterator_or_error = interpreter.accumulator().to_object(global_object);
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if (iterator_or_error.is_error())
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auto iterator_object_or_error = interpreter.accumulator().to_object(global_object);
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if (iterator_object_or_error.is_error())
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return;
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auto* iterator = iterator_or_error.release_value();
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auto iterator = object_to_iterator(global_object, *iterator_object_or_error.release_value());
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auto* array = MUST(Array::create(global_object, 0));
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size_t index = 0;
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while (true) {
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auto iterator_result_or_error = iterator_next(*iterator);
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auto iterator_result_or_error = iterator_next(global_object, iterator);
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if (iterator_result_or_error.is_error())
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return;
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auto* iterator_result = iterator_result_or_error.release_value();
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@ -543,17 +566,17 @@ void GetIterator::execute_impl(Bytecode::Interpreter& interpreter) const
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auto iterator_or_error = get_iterator(interpreter.global_object(), interpreter.accumulator());
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if (iterator_or_error.is_error())
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return;
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interpreter.accumulator() = iterator_or_error.release_value();
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interpreter.accumulator() = iterator_to_object(interpreter.global_object(), iterator_or_error.release_value());
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}
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void IteratorNext::execute_impl(Bytecode::Interpreter& interpreter) const
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{
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auto object_or_error = interpreter.accumulator().to_object(interpreter.global_object());
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if (object_or_error.is_error())
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auto iterator_object_or_error = interpreter.accumulator().to_object(interpreter.global_object());
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if (iterator_object_or_error.is_error())
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return;
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auto* object = object_or_error.release_value();
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auto iterator = object_to_iterator(interpreter.global_object(), *iterator_object_or_error.release_value());
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auto iterator_result_or_error = iterator_next(*object);
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auto iterator_result_or_error = iterator_next(interpreter.global_object(), iterator);
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if (iterator_result_or_error.is_error())
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return;
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auto* iterator_result = iterator_result_or_error.release_value();
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@ -1,6 +1,6 @@
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2020, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -114,10 +114,10 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
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while (true) {
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if (k >= MAX_ARRAY_LIKE_INDEX) {
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auto error = vm.throw_completion<TypeError>(global_object, ErrorType::ArrayMaxSize);
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return TRY(iterator_close(*iterator, move(error)));
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return TRY(iterator_close(global_object, iterator, move(error)));
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}
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auto* next = TRY(iterator_step(global_object, *iterator));
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auto* next = TRY(iterator_step(global_object, iterator));
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if (!next) {
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TRY(array->set(vm.names.length, Value(k), Object::ShouldThrowExceptions::Yes));
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return array;
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@ -129,7 +129,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
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if (map_fn) {
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auto mapped_value_or_error = vm.call(*map_fn, this_arg, next_value, Value(k));
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if (mapped_value_or_error.is_error())
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return TRY(iterator_close(*iterator, mapped_value_or_error.release_error()));
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return TRY(iterator_close(global_object, iterator, mapped_value_or_error.release_error()));
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mapped_value = mapped_value_or_error.release_value();
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} else {
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mapped_value = next_value;
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@ -137,7 +137,7 @@ JS_DEFINE_NATIVE_FUNCTION(ArrayConstructor::from)
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auto result_or_error = array->create_data_property_or_throw(k, mapped_value);
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if (result_or_error.is_error())
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return TRY(iterator_close(*iterator, result_or_error.release_error()));
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return TRY(iterator_close(global_object, iterator, result_or_error.release_error()));
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++k;
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}
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -10,16 +11,15 @@
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namespace JS {
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AsyncFromSyncIterator* AsyncFromSyncIterator::create(GlobalObject& global_object, Object* sync_iterator_record)
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AsyncFromSyncIterator* AsyncFromSyncIterator::create(GlobalObject& global_object, Iterator sync_iterator_record)
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{
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return global_object.heap().allocate<AsyncFromSyncIterator>(global_object, global_object, sync_iterator_record);
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}
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AsyncFromSyncIterator::AsyncFromSyncIterator(GlobalObject& global_object, Object* sync_iterator_record)
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AsyncFromSyncIterator::AsyncFromSyncIterator(GlobalObject& global_object, Iterator sync_iterator_record)
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: Object(*global_object.async_from_sync_iterator_prototype())
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, m_sync_iterator_record(sync_iterator_record)
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{
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VERIFY(m_sync_iterator_record);
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}
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void AsyncFromSyncIterator::initialize(GlobalObject& global_object)
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@ -30,7 +30,8 @@ void AsyncFromSyncIterator::initialize(GlobalObject& global_object)
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void AsyncFromSyncIterator::visit_edges(Cell::Visitor& visitor)
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{
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Object::visit_edges(visitor);
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visitor.visit(m_sync_iterator_record);
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visitor.visit(m_sync_iterator_record.iterator);
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visitor.visit(m_sync_iterator_record.next_method);
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}
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}
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@ -1,11 +1,13 @@
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/*
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* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibJS/Runtime/Iterator.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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@ -15,18 +17,19 @@ class AsyncFromSyncIterator final : public Object {
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JS_OBJECT(AsyncFromSyncIterator, Object);
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public:
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static AsyncFromSyncIterator* create(GlobalObject&, Object* sync_iterator_record);
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static AsyncFromSyncIterator* create(GlobalObject&, Iterator sync_iterator_record);
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explicit AsyncFromSyncIterator(GlobalObject&, Object* sync_iterator_record);
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explicit AsyncFromSyncIterator(GlobalObject&, Iterator sync_iterator_record);
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virtual void initialize(GlobalObject&) override;
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virtual ~AsyncFromSyncIterator() override = default;
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void visit_edges(Visitor& visitor) override;
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Object& sync_iterator_record() const { return *m_sync_iterator_record; }
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Iterator& sync_iterator_record() { return m_sync_iterator_record; }
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Iterator const& sync_iterator_record() const { return m_sync_iterator_record; }
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private:
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Object* m_sync_iterator_record { nullptr }; // [[SyncIteratorRecord]]
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Iterator m_sync_iterator_record; // [[SyncIteratorRecord]]
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};
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}
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@ -1,5 +1,6 @@
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/*
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* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
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* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -30,8 +31,10 @@ void AsyncFromSyncIteratorPrototype::initialize(GlobalObject& global_object)
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}
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// 27.1.4.4 AsyncFromSyncIteratorContinuation ( result, promiseCapability ), https://tc39.es/ecma262/#sec-asyncfromsynciteratorcontinuation
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static ThrowCompletionOr<Object*> async_from_sync_iterator_continuation(VM& vm, GlobalObject& global_object, Object& result, PromiseCapability& promise_capability)
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static ThrowCompletionOr<Object*> async_from_sync_iterator_continuation(GlobalObject& global_object, Object& result, PromiseCapability& promise_capability)
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{
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auto& vm = global_object.vm();
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// 1. Let done be IteratorComplete(result).
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// 2. IfAbruptRejectPromise(done, promiseCapability).
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auto done = TRY_OR_REJECT(vm, promise_capability, iterator_complete(global_object, result));
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@ -75,17 +78,18 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::next)
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// 4. Let syncIteratorRecord be O.[[SyncIteratorRecord]].
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auto& sync_iterator_record = this_object->sync_iterator_record();
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// 5. If value is present, then
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// a. Let result be IteratorNext(syncIteratorRecord, value).
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// 6. Else,
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// a. Let result be IteratorNext(syncIteratorRecord).
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// 7. IfAbruptRejectPromise(result, promiseCapability).
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auto* result = TRY_OR_REJECT(vm, promise_capability,
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(vm.argument_count() > 0 ? iterator_next(sync_iterator_record, vm.argument(0))
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: iterator_next(sync_iterator_record)));
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(vm.argument_count() > 0 ? iterator_next(global_object, sync_iterator_record, vm.argument(0))
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: iterator_next(global_object, sync_iterator_record)));
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// 8. Return ! AsyncFromSyncIteratorContinuation(result, promiseCapability).
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return MUST(async_from_sync_iterator_continuation(vm, global_object, *result, promise_capability));
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return MUST(async_from_sync_iterator_continuation(global_object, *result, promise_capability));
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}
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// 27.1.4.2.2 %AsyncFromSyncIteratorPrototype%.return ( [ value ] ), https://tc39.es/ecma262/#sec-%asyncfromsynciteratorprototype%.return
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@ -99,11 +103,11 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::return_)
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auto promise_capability = MUST(new_promise_capability(global_object, global_object.promise_constructor()));
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// 4. Let syncIterator be O.[[SyncIteratorRecord]].[[Iterator]].
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auto& sync_iterator = this_object->sync_iterator_record();
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auto* sync_iterator = this_object->sync_iterator_record().iterator;
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// 5. Let return be GetMethod(syncIterator, "return").
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// 6. IfAbruptRejectPromise(return, promiseCapability).
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auto* return_method = TRY_OR_REJECT(vm, promise_capability, Value(&sync_iterator).get_method(global_object, vm.names.return_));
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auto* return_method = TRY_OR_REJECT(vm, promise_capability, Value(sync_iterator).get_method(global_object, vm.names.return_));
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// 7. If return is undefined, then
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if (return_method == nullptr) {
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@ -123,8 +127,8 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::return_)
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// a. Let result be Call(return, syncIterator).
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// 10. IfAbruptRejectPromise(result, promiseCapability).
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auto result = TRY_OR_REJECT(vm, promise_capability,
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(vm.argument_count() > 0 ? call(global_object, return_method, &sync_iterator, vm.argument(0))
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: call(global_object, return_method, &sync_iterator)));
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(vm.argument_count() > 0 ? call(global_object, return_method, sync_iterator, vm.argument(0))
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: call(global_object, return_method, sync_iterator)));
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// 11. If Type(result) is not Object, then
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if (!result.is_object()) {
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@ -136,7 +140,7 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::return_)
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}
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// 12. Return ! AsyncFromSyncIteratorContinuation(result, promiseCapability).
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return MUST(async_from_sync_iterator_continuation(vm, global_object, result.as_object(), promise_capability));
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return MUST(async_from_sync_iterator_continuation(global_object, result.as_object(), promise_capability));
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}
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// 27.1.4.2.3 %AsyncFromSyncIteratorPrototype%.throw ( [ value ] ), https://tc39.es/ecma262/#sec-%asyncfromsynciteratorprototype%.throw
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@ -150,11 +154,11 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::throw_)
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auto promise_capability = MUST(new_promise_capability(global_object, global_object.promise_constructor()));
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// 4. Let syncIterator be O.[[SyncIteratorRecord]].[[Iterator]].
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auto& sync_iterator = this_object->sync_iterator_record();
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auto* sync_iterator = this_object->sync_iterator_record().iterator;
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// 5. Let throw be GetMethod(syncIterator, "throw").
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// 6. IfAbruptRejectPromise(throw, promiseCapability).
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auto* throw_method = TRY_OR_REJECT(vm, promise_capability, Value(&sync_iterator).get_method(global_object, vm.names.throw_));
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auto* throw_method = TRY_OR_REJECT(vm, promise_capability, Value(sync_iterator).get_method(global_object, vm.names.throw_));
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// 7. If throw is undefined, then
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if (throw_method == nullptr) {
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@ -169,8 +173,8 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::throw_)
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// a. Let result be Call(throw, syncIterator).
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// 10. IfAbruptRejectPromise(result, promiseCapability).
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auto result = TRY_OR_REJECT(vm, promise_capability,
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(vm.argument_count() > 0 ? call(global_object, throw_method, &sync_iterator, vm.argument(0))
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: call(global_object, throw_method, &sync_iterator)));
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(vm.argument_count() > 0 ? call(global_object, throw_method, sync_iterator, vm.argument(0))
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: call(global_object, throw_method, sync_iterator)));
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// 11. If Type(result) is not Object, then
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if (!result.is_object()) {
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@ -183,21 +187,26 @@ JS_DEFINE_NATIVE_FUNCTION(AsyncFromSyncIteratorPrototype::throw_)
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}
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// 12. Return ! AsyncFromSyncIteratorContinuation(result, promiseCapability).
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return MUST(async_from_sync_iterator_continuation(vm, global_object, result.as_object(), promise_capability));
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return MUST(async_from_sync_iterator_continuation(global_object, result.as_object(), promise_capability));
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}
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// 27.1.4.1 CreateAsyncFromSyncIterator ( syncIteratorRecord ), https://tc39.es/ecma262/#sec-createasyncfromsynciterator
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ThrowCompletionOr<Object*> create_async_from_sync_iterator(GlobalObject& global_object, Object& sync_iterator_record)
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ThrowCompletionOr<Iterator> create_async_from_sync_iterator(GlobalObject& global_object, Iterator sync_iterator_record)
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{
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auto& vm = global_object.vm();
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||||
|
||||
// 1. Let asyncIterator be ! OrdinaryObjectCreate(%AsyncFromSyncIteratorPrototype%, « [[SyncIteratorRecord]] »).
|
||||
// 2. Set asyncIterator.[[SyncIteratorRecord]] to syncIteratorRecord.
|
||||
auto* async_iterator = AsyncFromSyncIterator::create(global_object, sync_iterator_record);
|
||||
|
||||
// 3. Let nextMethod be ! Get(asyncIterator, "next").
|
||||
auto next_method = MUST(async_iterator->get(vm.names.next));
|
||||
|
||||
// 4. Let iteratorRecord be the Record { [[Iterator]]: asyncIterator, [[NextMethod]]: nextMethod, [[Done]]: false }.
|
||||
auto iterator_record = Iterator { .iterator = async_iterator, .next_method = next_method, .done = false };
|
||||
|
||||
// 5. Return iteratorRecord.
|
||||
// FIXME: Use actual iterator records instead of objects.
|
||||
|
||||
// Note: AsyncFromSyncIterator is an object with the extra slot SyncIteratorRecord.
|
||||
return AsyncFromSyncIterator::create(global_object, &sync_iterator_record);
|
||||
return iterator_record;
|
||||
}
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
|
||||
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -8,6 +9,7 @@
|
|||
|
||||
#include <LibJS/Runtime/AsyncFromSyncIterator.h>
|
||||
#include <LibJS/Runtime/Completion.h>
|
||||
#include <LibJS/Runtime/Iterator.h>
|
||||
#include <LibJS/Runtime/PrototypeObject.h>
|
||||
|
||||
namespace JS {
|
||||
|
|
@ -27,6 +29,6 @@ private:
|
|||
JS_DECLARE_NATIVE_FUNCTION(throw_);
|
||||
};
|
||||
|
||||
ThrowCompletionOr<Object*> create_async_from_sync_iterator(GlobalObject&, Object& sync_iterator);
|
||||
ThrowCompletionOr<Iterator> create_async_from_sync_iterator(GlobalObject&, Iterator sync_iterator);
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -276,7 +276,7 @@ ThrowCompletionOr<Vector<String>> string_list_from_iterable(GlobalObject& global
|
|||
}
|
||||
|
||||
// 2. Let iteratorRecord be ? GetIterator(iterable).
|
||||
auto* iterator_record = TRY(get_iterator(global_object, iterable));
|
||||
auto iterator_record = TRY(get_iterator(global_object, iterable));
|
||||
|
||||
// 3. Let list be a new empty List.
|
||||
Vector<String> list;
|
||||
|
|
@ -287,7 +287,7 @@ ThrowCompletionOr<Vector<String>> string_list_from_iterable(GlobalObject& global
|
|||
// 5. Repeat, while next is not false,
|
||||
do {
|
||||
// a. Set next to ? IteratorStep(iteratorRecord).
|
||||
next = TRY(iterator_step(global_object, *iterator_record));
|
||||
next = TRY(iterator_step(global_object, iterator_record));
|
||||
|
||||
// b. If next is not false, then
|
||||
if (next != nullptr) {
|
||||
|
|
@ -300,7 +300,7 @@ ThrowCompletionOr<Vector<String>> string_list_from_iterable(GlobalObject& global
|
|||
auto error = vm.throw_completion<TypeError>(global_object, ErrorType::NotAString, next_value);
|
||||
|
||||
// 2. Return ? IteratorClose(iteratorRecord, error).
|
||||
return iterator_close(*iterator_record, move(error));
|
||||
return iterator_close(global_object, iterator_record, move(error));
|
||||
}
|
||||
|
||||
// iii. Append nextValue to the end of the List list.
|
||||
|
|
|
|||
21
Userland/Libraries/LibJS/Runtime/Iterator.h
Normal file
21
Userland/Libraries/LibJS/Runtime/Iterator.h
Normal file
|
|
@ -0,0 +1,21 @@
|
|||
/*
|
||||
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
||||
#pragma once
|
||||
|
||||
#include <LibJS/Runtime/Object.h>
|
||||
#include <LibJS/Runtime/Value.h>
|
||||
|
||||
namespace JS {
|
||||
|
||||
// Iterator Record
|
||||
struct Iterator {
|
||||
Object* iterator { nullptr }; // [[Iterator]]
|
||||
Value next_method; // [[NextMethod]]
|
||||
bool done { false }; // [[Done]]
|
||||
};
|
||||
|
||||
}
|
||||
|
|
@ -1,5 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
|
||||
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -15,53 +16,81 @@
|
|||
namespace JS {
|
||||
|
||||
// 7.4.1 GetIterator ( obj [ , hint [ , method ] ] ), https://tc39.es/ecma262/#sec-getiterator
|
||||
ThrowCompletionOr<Object*> get_iterator(GlobalObject& global_object, Value value, IteratorHint hint, Optional<Value> method)
|
||||
ThrowCompletionOr<Iterator> get_iterator(GlobalObject& global_object, Value value, IteratorHint hint, Optional<Value> method)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
// 1. If hint is not present, set hint to sync.
|
||||
|
||||
// 2. If method is not present, then
|
||||
if (!method.has_value()) {
|
||||
// a. If hint is async, then
|
||||
if (hint == IteratorHint::Async) {
|
||||
// i. Set method to ? GetMethod(obj, @@asyncIterator).
|
||||
auto* async_method = TRY(value.get_method(global_object, *vm.well_known_symbol_async_iterator()));
|
||||
|
||||
// ii. If method is undefined, then
|
||||
if (async_method == nullptr) {
|
||||
// 1. Let syncMethod be ? GetMethod(obj, @@iterator).
|
||||
auto* sync_method = TRY(value.get_method(global_object, *vm.well_known_symbol_iterator()));
|
||||
auto* sync_iterator_record = TRY(get_iterator(global_object, value, IteratorHint::Sync, sync_method));
|
||||
return TRY(create_async_from_sync_iterator(global_object, *sync_iterator_record));
|
||||
|
||||
// 2. Let syncIteratorRecord be ? GetIterator(obj, sync, syncMethod).
|
||||
auto sync_iterator_record = TRY(get_iterator(global_object, value, IteratorHint::Sync, sync_method));
|
||||
|
||||
// 3. Return ! CreateAsyncFromSyncIterator(syncIteratorRecord).
|
||||
return MUST(create_async_from_sync_iterator(global_object, sync_iterator_record));
|
||||
}
|
||||
|
||||
method = Value(async_method);
|
||||
} else {
|
||||
}
|
||||
// b. Otherwise, set method to ? GetMethod(obj, @@iterator).
|
||||
else {
|
||||
method = TRY(value.get_method(global_object, *vm.well_known_symbol_iterator()));
|
||||
}
|
||||
}
|
||||
|
||||
// NOTE: Additional type check to produce a better error message than Call().
|
||||
if (!method->is_function())
|
||||
return vm.throw_completion<TypeError>(global_object, ErrorType::NotIterable, value.to_string_without_side_effects());
|
||||
|
||||
auto iterator = TRY(vm.call(method->as_function(), value));
|
||||
// 3. Let iterator be ? Call(method, obj).
|
||||
auto iterator = TRY(call(global_object, *method, value));
|
||||
|
||||
// 4. If Type(iterator) is not Object, throw a TypeError exception.
|
||||
if (!iterator.is_object())
|
||||
return vm.throw_completion<TypeError>(global_object, ErrorType::NotIterable, value.to_string_without_side_effects());
|
||||
|
||||
return &iterator.as_object();
|
||||
// 5. Let nextMethod be ? GetV(iterator, "next").
|
||||
auto next_method = TRY(iterator.get(global_object, vm.names.next));
|
||||
|
||||
// 6. Let iteratorRecord be the Record { [[Iterator]]: iterator, [[NextMethod]]: nextMethod, [[Done]]: false }.
|
||||
auto iterator_record = Iterator { .iterator = &iterator.as_object(), .next_method = next_method, .done = false };
|
||||
|
||||
// 7. Return iteratorRecord.
|
||||
return iterator_record;
|
||||
}
|
||||
|
||||
// 7.4.2 IteratorNext ( iteratorRecord [ , value ] ), https://tc39.es/ecma262/#sec-iteratornext
|
||||
ThrowCompletionOr<Object*> iterator_next(Object& iterator, Optional<Value> value)
|
||||
ThrowCompletionOr<Object*> iterator_next(GlobalObject& global_object, Iterator const& iterator_record, Optional<Value> value)
|
||||
{
|
||||
// FIXME: Implement using iterator records, not ordinary objects
|
||||
auto& vm = iterator.vm();
|
||||
auto& global_object = iterator.global_object();
|
||||
|
||||
auto next_method = TRY(iterator.get(vm.names.next));
|
||||
if (!next_method.is_function())
|
||||
return vm.throw_completion<TypeError>(global_object, ErrorType::IterableNextNotAFunction);
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
Value result;
|
||||
if (!value.has_value())
|
||||
result = TRY(vm.call(next_method.as_function(), &iterator));
|
||||
else
|
||||
result = TRY(vm.call(next_method.as_function(), &iterator, *value));
|
||||
|
||||
// 1. If value is not present, then
|
||||
if (!value.has_value()) {
|
||||
// a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]]).
|
||||
result = TRY(call(global_object, iterator_record.next_method, iterator_record.iterator));
|
||||
} else {
|
||||
// a. Let result be ? Call(iteratorRecord.[[NextMethod]], iteratorRecord.[[Iterator]], « value »).
|
||||
result = TRY(call(global_object, iterator_record.next_method, iterator_record.iterator, *value));
|
||||
}
|
||||
|
||||
// 3. If Type(result) is not Object, throw a TypeError exception.
|
||||
if (!result.is_object())
|
||||
return vm.throw_completion<TypeError>(global_object, ErrorType::IterableNextBadReturn);
|
||||
|
||||
// 4. Return result.
|
||||
return &result.as_object();
|
||||
}
|
||||
|
||||
|
|
@ -84,53 +113,60 @@ ThrowCompletionOr<Value> iterator_value(GlobalObject& global_object, Object& ite
|
|||
}
|
||||
|
||||
// 7.4.5 IteratorStep ( iteratorRecord ), https://tc39.es/ecma262/#sec-iteratorstep
|
||||
ThrowCompletionOr<Object*> iterator_step(GlobalObject& global_object, Object& iterator)
|
||||
ThrowCompletionOr<Object*> iterator_step(GlobalObject& global_object, Iterator const& iterator_record)
|
||||
{
|
||||
auto* result = TRY(iterator_next(iterator));
|
||||
// 1. Let result be ? IteratorNext(iteratorRecord).
|
||||
auto* result = TRY(iterator_next(global_object, iterator_record));
|
||||
|
||||
// 2. Let done be ? IteratorComplete(result).
|
||||
auto done = TRY(iterator_complete(global_object, *result));
|
||||
|
||||
// 3. If done is true, return false.
|
||||
if (done)
|
||||
return nullptr;
|
||||
|
||||
// 4. Return result.
|
||||
return result;
|
||||
}
|
||||
|
||||
// 7.4.6 IteratorClose ( iteratorRecord, completion ), https://tc39.es/ecma262/#sec-iteratorclose
|
||||
// 7.4.8 AsyncIteratorClose ( iteratorRecord, completion ), https://tc39.es/ecma262/#sec-asynciteratorclose
|
||||
// NOTE: These only differ in that async awaits the inner value after the call.
|
||||
static Completion iterator_close_(Object& iterator, Completion completion, IteratorHint iterator_hint)
|
||||
static Completion iterator_close_impl(GlobalObject& global_object, Iterator const& iterator_record, Completion completion, IteratorHint iterator_hint)
|
||||
{
|
||||
auto& vm = iterator.vm();
|
||||
auto& global_object = iterator.global_object();
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
// 1. Assert: Type(iteratorRecord.[[Iterator]]) is Object.
|
||||
|
||||
// 2. Let iterator be iteratorRecord.[[Iterator]].
|
||||
auto* iterator = iterator_record.iterator;
|
||||
|
||||
// The callers of iterator_close() are often in an exceptional state.
|
||||
// Temporarily clear that exception for invocation(s) to Call.
|
||||
TemporaryClearException clear_exception(vm);
|
||||
|
||||
// 3. Let innerResult be GetMethod(iterator, "return").
|
||||
auto inner_result_or_error = Value(&iterator).get_method(global_object, vm.names.return_);
|
||||
Value inner_result;
|
||||
auto inner_result = ThrowCompletionOr<Value> { js_undefined() };
|
||||
auto get_method_result = Value(iterator).get_method(global_object, vm.names.return_);
|
||||
if (get_method_result.is_error())
|
||||
inner_result = get_method_result.release_error();
|
||||
|
||||
// 4. If innerResult.[[Type]] is normal, then
|
||||
if (!inner_result_or_error.is_error()) {
|
||||
if (!inner_result.is_error()) {
|
||||
// a. Let return be innerResult.[[Value]].
|
||||
auto* return_method = inner_result_or_error.release_value();
|
||||
auto* return_method = get_method_result.value();
|
||||
|
||||
// b. If return is undefined, return Completion(completion).
|
||||
if (!return_method)
|
||||
return completion;
|
||||
|
||||
// c. Set innerResult to Call(return, iterator).
|
||||
auto result_or_error = vm.call(*return_method, &iterator);
|
||||
if (result_or_error.is_error()) {
|
||||
inner_result_or_error = result_or_error.release_error();
|
||||
} else {
|
||||
inner_result = result_or_error.release_value();
|
||||
// Note: If this is AsyncIteratorClose perform one extra step.
|
||||
if (iterator_hint == IteratorHint::Async) {
|
||||
// d. If innerResult.[[Type]] is normal, set innerResult to Await(innerResult.[[Value]]).
|
||||
inner_result = TRY(await(global_object, inner_result));
|
||||
}
|
||||
inner_result = call(global_object, return_method, iterator);
|
||||
|
||||
// Note: If this is AsyncIteratorClose perform one extra step.
|
||||
if (iterator_hint == IteratorHint::Async && !inner_result.is_error()) {
|
||||
// d. If innerResult.[[Type]] is normal, set innerResult to Await(innerResult.[[Value]]).
|
||||
inner_result = await(global_object, inner_result.value());
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -139,11 +175,11 @@ static Completion iterator_close_(Object& iterator, Completion completion, Itera
|
|||
return completion;
|
||||
|
||||
// 6. If innerResult.[[Type]] is throw, return Completion(innerResult).
|
||||
if (inner_result_or_error.is_error())
|
||||
return inner_result_or_error.release_error();
|
||||
if (inner_result.is_throw_completion())
|
||||
return inner_result;
|
||||
|
||||
// 7. If Type(innerResult.[[Value]]) is not Object, throw a TypeError exception.
|
||||
if (!inner_result.is_object())
|
||||
if (!inner_result.value().is_object())
|
||||
return vm.throw_completion<TypeError>(global_object, ErrorType::IterableReturnBadReturn);
|
||||
|
||||
// 8. Return Completion(completion).
|
||||
|
|
@ -151,24 +187,32 @@ static Completion iterator_close_(Object& iterator, Completion completion, Itera
|
|||
}
|
||||
|
||||
// 7.4.6 IteratorClose ( iteratorRecord, completion ), https://tc39.es/ecma262/#sec-iteratorclose
|
||||
Completion iterator_close(Object& iterator, Completion completion)
|
||||
Completion iterator_close(GlobalObject& global_object, Iterator const& iterator_record, Completion completion)
|
||||
{
|
||||
return iterator_close_(iterator, move(completion), IteratorHint::Sync);
|
||||
return iterator_close_impl(global_object, iterator_record, move(completion), IteratorHint::Sync);
|
||||
}
|
||||
|
||||
// 7.4.8 AsyncIteratorClose ( iteratorRecord, completion ), https://tc39.es/ecma262/#sec-asynciteratorclose
|
||||
Completion async_iterator_close(Object& iterator, Completion completion)
|
||||
Completion async_iterator_close(GlobalObject& global_object, Iterator const& iterator_record, Completion completion)
|
||||
{
|
||||
return iterator_close_(iterator, move(completion), IteratorHint::Async);
|
||||
return iterator_close_impl(global_object, iterator_record, move(completion), IteratorHint::Async);
|
||||
}
|
||||
|
||||
// 7.4.9 CreateIterResultObject ( value, done ), https://tc39.es/ecma262/#sec-createiterresultobject
|
||||
Object* create_iterator_result_object(GlobalObject& global_object, Value value, bool done)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
// 1. Let obj be ! OrdinaryObjectCreate(%Object.prototype%).
|
||||
auto* object = Object::create(global_object, global_object.object_prototype());
|
||||
|
||||
// 2. Perform ! CreateDataPropertyOrThrow(obj, "value", value).
|
||||
MUST(object->create_data_property_or_throw(vm.names.value, value));
|
||||
|
||||
// 3. Perform ! CreateDataPropertyOrThrow(obj, "done", done).
|
||||
MUST(object->create_data_property_or_throw(vm.names.done, Value(done)));
|
||||
|
||||
// 4. Return obj.
|
||||
return object;
|
||||
}
|
||||
|
||||
|
|
@ -188,19 +232,20 @@ ThrowCompletionOr<MarkedValueList> iterable_to_list(GlobalObject& global_object,
|
|||
return { move(values) };
|
||||
}
|
||||
|
||||
// Non-standard
|
||||
Completion get_iterator_values(GlobalObject& global_object, Value iterable, IteratorValueCallback callback, Optional<Value> method)
|
||||
{
|
||||
auto* iterator = TRY(get_iterator(global_object, iterable, IteratorHint::Sync, move(method)));
|
||||
auto iterator_record = TRY(get_iterator(global_object, iterable, IteratorHint::Sync, move(method)));
|
||||
|
||||
while (true) {
|
||||
auto* next_object = TRY(iterator_step(global_object, *iterator));
|
||||
auto* next_object = TRY(iterator_step(global_object, iterator_record));
|
||||
if (!next_object)
|
||||
return {};
|
||||
|
||||
auto next_value = TRY(iterator_value(global_object, *next_object));
|
||||
|
||||
if (auto completion = callback(next_value); completion.has_value())
|
||||
return iterator_close(*iterator, completion.release_value());
|
||||
return iterator_close(global_object, iterator_record, completion.release_value());
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -1,5 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
|
||||
* Copyright (c) 2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -9,6 +10,7 @@
|
|||
#include <AK/Function.h>
|
||||
#include <AK/Optional.h>
|
||||
#include <LibJS/Runtime/Completion.h>
|
||||
#include <LibJS/Runtime/Iterator.h>
|
||||
#include <LibJS/Runtime/Object.h>
|
||||
|
||||
namespace JS {
|
||||
|
|
@ -20,17 +22,17 @@ enum class IteratorHint {
|
|||
Async,
|
||||
};
|
||||
|
||||
ThrowCompletionOr<Object*> get_iterator(GlobalObject&, Value value, IteratorHint hint = IteratorHint::Sync, Optional<Value> method = {});
|
||||
ThrowCompletionOr<Object*> iterator_next(Object& iterator, Optional<Value> value = {});
|
||||
ThrowCompletionOr<Object*> iterator_step(GlobalObject&, Object& iterator);
|
||||
ThrowCompletionOr<Iterator> get_iterator(GlobalObject&, Value, IteratorHint = IteratorHint::Sync, Optional<Value> method = {});
|
||||
ThrowCompletionOr<Object*> iterator_next(GlobalObject&, Iterator const&, Optional<Value> = {});
|
||||
ThrowCompletionOr<Object*> iterator_step(GlobalObject&, Iterator const&);
|
||||
ThrowCompletionOr<bool> iterator_complete(GlobalObject&, Object& iterator_result);
|
||||
ThrowCompletionOr<Value> iterator_value(GlobalObject&, Object& iterator_result);
|
||||
Completion iterator_close(Object& iterator, Completion completion);
|
||||
Completion async_iterator_close(Object& iterator, Completion completion);
|
||||
Object* create_iterator_result_object(GlobalObject&, Value value, bool done);
|
||||
Completion iterator_close(GlobalObject&, Iterator const&, Completion);
|
||||
Completion async_iterator_close(GlobalObject&, Iterator const&, Completion);
|
||||
Object* create_iterator_result_object(GlobalObject&, Value, bool done);
|
||||
ThrowCompletionOr<MarkedValueList> iterable_to_list(GlobalObject&, Value iterable, Optional<Value> method = {});
|
||||
|
||||
using IteratorValueCallback = Function<Optional<Completion>(Value)>;
|
||||
Completion get_iterator_values(GlobalObject& global_object, Value iterable, IteratorValueCallback callback, Optional<Value> method = {});
|
||||
Completion get_iterator_values(GlobalObject&, Value iterable, IteratorValueCallback callback, Optional<Value> method = {});
|
||||
|
||||
}
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -38,30 +38,10 @@ static ThrowCompletionOr<Value> get_promise_resolve(GlobalObject& global_object,
|
|||
return promise_resolve;
|
||||
}
|
||||
|
||||
static bool iterator_record_is_complete(GlobalObject& global_object, Object& iterator_record)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
// FIXME: Create a native iterator structure with the [[Done]] internal slot. For now, temporarily clear
|
||||
// the exception so we can access the "done" property on the iterator object.
|
||||
TemporaryClearException clear_exception(vm);
|
||||
return MUST(iterator_complete(global_object, iterator_record));
|
||||
}
|
||||
|
||||
static void set_iterator_record_complete(GlobalObject& global_object, Object& iterator_record)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
// FIXME: Create a native iterator structure with the [[Done]] internal slot. For now, temporarily clear
|
||||
// the exception so we can access the "done" property on the iterator object.
|
||||
TemporaryClearException clear_exception(vm);
|
||||
MUST(iterator_record.set(vm.names.done, Value(true), Object::ShouldThrowExceptions::No));
|
||||
}
|
||||
|
||||
using EndOfElementsCallback = Function<ThrowCompletionOr<Value>(PromiseValueList&)>;
|
||||
using InvokeElementFunctionCallback = Function<ThrowCompletionOr<Value>(PromiseValueList&, RemainingElements&, Value, size_t)>;
|
||||
|
||||
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)
|
||||
static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_object, Iterator& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve, EndOfElementsCallback end_of_list, InvokeElementFunctionCallback invoke_element_function)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
|
|
@ -85,7 +65,7 @@ static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_obje
|
|||
// b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// c. ReturnIfAbrupt(next).
|
||||
if (next_or_error.is_throw_completion()) {
|
||||
set_iterator_record_complete(global_object, iterator_record);
|
||||
iterator_record.done = true;
|
||||
return next_or_error.release_error();
|
||||
}
|
||||
auto* next = next_or_error.release_value();
|
||||
|
|
@ -93,7 +73,7 @@ static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_obje
|
|||
// d. If next is false, then
|
||||
if (!next) {
|
||||
// i. Set iteratorRecord.[[Done]] to true.
|
||||
set_iterator_record_complete(global_object, iterator_record);
|
||||
iterator_record.done = true;
|
||||
|
||||
// ii. Set remainingElementsCount.[[Value]] to remainingElementsCount.[[Value]] - 1.
|
||||
// iii. If remainingElementsCount.[[Value]] is 0, then
|
||||
|
|
@ -112,7 +92,7 @@ static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_obje
|
|||
// f. If nextValue is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// g. ReturnIfAbrupt(nextValue).
|
||||
if (next_value_or_error.is_throw_completion()) {
|
||||
set_iterator_record_complete(global_object, iterator_record);
|
||||
iterator_record.done = true;
|
||||
return next_value_or_error.release_error();
|
||||
}
|
||||
auto next_value = next_value_or_error.release_value();
|
||||
|
|
@ -137,7 +117,7 @@ static ThrowCompletionOr<Value> perform_promise_common(GlobalObject& global_obje
|
|||
}
|
||||
|
||||
// 27.2.4.1.2 PerformPromiseAll ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseall
|
||||
static ThrowCompletionOr<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, Iterator& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
|
|
@ -171,7 +151,7 @@ static ThrowCompletionOr<Value> perform_promise_all(GlobalObject& global_object,
|
|||
}
|
||||
|
||||
// 27.2.4.2.1 PerformPromiseAllSettled ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseallsettled
|
||||
static ThrowCompletionOr<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, Iterator& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
|
|
@ -214,7 +194,7 @@ static ThrowCompletionOr<Value> perform_promise_all_settled(GlobalObject& global
|
|||
}
|
||||
|
||||
// 27.2.4.3.1 PerformPromiseAny ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiseany
|
||||
static ThrowCompletionOr<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, Iterator& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
|
|
@ -250,7 +230,7 @@ static ThrowCompletionOr<Value> perform_promise_any(GlobalObject& global_object,
|
|||
}
|
||||
|
||||
// 27.2.4.5.1 PerformPromiseRace ( iteratorRecord, constructor, resultCapability, promiseResolve ), https://tc39.es/ecma262/#sec-performpromiserace
|
||||
static ThrowCompletionOr<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, Iterator& iterator_record, Value constructor, PromiseCapability result_capability, Value promise_resolve)
|
||||
{
|
||||
auto& vm = global_object.vm();
|
||||
|
||||
|
|
@ -353,16 +333,16 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::all)
|
|||
|
||||
// 5. Let iteratorRecord be GetIterator(iterable).
|
||||
// 6. IfAbruptRejectPromise(iteratorRecord, promiseCapability).
|
||||
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
auto iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
|
||||
// 7. Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability, promiseResolve).
|
||||
auto result = perform_promise_all(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
|
||||
auto result = perform_promise_all(global_object, iterator_record, constructor, promise_capability, promise_resolve);
|
||||
|
||||
// 8. If result is an abrupt completion, then
|
||||
if (result.is_error()) {
|
||||
// a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result).
|
||||
if (!iterator_record_is_complete(global_object, *iterator_record))
|
||||
result = iterator_close(*iterator_record, result.release_error());
|
||||
if (!iterator_record.done)
|
||||
result = iterator_close(global_object, iterator_record, result.release_error());
|
||||
|
||||
// b. IfAbruptRejectPromise(result, promiseCapability).
|
||||
TRY_OR_REJECT(vm, promise_capability, result);
|
||||
|
|
@ -387,16 +367,16 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::all_settled)
|
|||
|
||||
// 5. Let iteratorRecord be GetIterator(iterable).
|
||||
// 6. IfAbruptRejectPromise(iteratorRecord, promiseCapability).
|
||||
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
auto iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
|
||||
// 7. Let result be PerformPromiseAllSettled(iteratorRecord, C, promiseCapability, promiseResolve).
|
||||
auto result = perform_promise_all_settled(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
|
||||
auto result = perform_promise_all_settled(global_object, iterator_record, constructor, promise_capability, promise_resolve);
|
||||
|
||||
// 8. If result is an abrupt completion, then
|
||||
if (result.is_error()) {
|
||||
// a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result).
|
||||
if (!iterator_record_is_complete(global_object, *iterator_record))
|
||||
result = iterator_close(*iterator_record, result.release_error());
|
||||
if (!iterator_record.done)
|
||||
result = iterator_close(global_object, iterator_record, result.release_error());
|
||||
|
||||
// b. IfAbruptRejectPromise(result, promiseCapability).
|
||||
TRY_OR_REJECT(vm, promise_capability, result);
|
||||
|
|
@ -421,16 +401,16 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::any)
|
|||
|
||||
// 5. Let iteratorRecord be GetIterator(iterable).
|
||||
// 6. IfAbruptRejectPromise(iteratorRecord, promiseCapability).
|
||||
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
auto iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
|
||||
// 7. Let result be PerformPromiseAny(iteratorRecord, C, promiseCapability, promiseResolve).
|
||||
auto result = perform_promise_any(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
|
||||
auto result = perform_promise_any(global_object, iterator_record, constructor, promise_capability, promise_resolve);
|
||||
|
||||
// 8. If result is an abrupt completion, then
|
||||
if (result.is_error()) {
|
||||
// a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result).
|
||||
if (!iterator_record_is_complete(global_object, *iterator_record))
|
||||
result = iterator_close(*iterator_record, result.release_error());
|
||||
if (!iterator_record.done)
|
||||
result = iterator_close(global_object, iterator_record, result.release_error());
|
||||
|
||||
// b. IfAbruptRejectPromise(result, promiseCapability).
|
||||
TRY_OR_REJECT(vm, promise_capability, result);
|
||||
|
|
@ -455,16 +435,16 @@ JS_DEFINE_NATIVE_FUNCTION(PromiseConstructor::race)
|
|||
|
||||
// 5. Let iteratorRecord be GetIterator(iterable).
|
||||
// 6. IfAbruptRejectPromise(iteratorRecord, promiseCapability).
|
||||
auto* iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
auto iterator_record = TRY_OR_REJECT(vm, promise_capability, get_iterator(global_object, vm.argument(0)));
|
||||
|
||||
// 7. Let result be PerformPromiseRace(iteratorRecord, C, promiseCapability, promiseResolve).
|
||||
auto result = perform_promise_race(global_object, *iterator_record, constructor, promise_capability, promise_resolve);
|
||||
auto result = perform_promise_race(global_object, iterator_record, constructor, promise_capability, promise_resolve);
|
||||
|
||||
// 8. If result is an abrupt completion, then
|
||||
if (result.is_error()) {
|
||||
// a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result).
|
||||
if (!iterator_record_is_complete(global_object, *iterator_record))
|
||||
result = iterator_close(*iterator_record, result.release_error());
|
||||
if (!iterator_record.done)
|
||||
result = iterator_close(global_object, iterator_record, result.release_error());
|
||||
|
||||
// b. IfAbruptRejectPromise(result, promiseCapability).
|
||||
TRY_OR_REJECT(vm, promise_capability, result);
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Idan Horowitz <idan.horowitz@serenityos.org>
|
||||
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021, Luke Wilde <lukew@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
|
|
@ -54,7 +54,7 @@ ThrowCompletionOr<MarkedValueList> iterable_to_list_of_type(GlobalObject& global
|
|||
// 4. Repeat, while next is not false,
|
||||
while (next) {
|
||||
// a. Set next to ? IteratorStep(iteratorRecord).
|
||||
auto* iterator_result = TRY(iterator_step(global_object, *iterator_record));
|
||||
auto* iterator_result = TRY(iterator_step(global_object, iterator_record));
|
||||
next = iterator_result;
|
||||
|
||||
// b. If next is not false, then
|
||||
|
|
@ -66,7 +66,7 @@ ThrowCompletionOr<MarkedValueList> iterable_to_list_of_type(GlobalObject& global
|
|||
// 1. Let completion be ThrowCompletion(a newly created TypeError object).
|
||||
auto completion = vm.throw_completion<TypeError>(global_object, ErrorType::IterableToListOfTypeInvalidValue, next_value.to_string_without_side_effects());
|
||||
// 2. Return ? IteratorClose(iteratorRecord, completion).
|
||||
return iterator_close(*iterator_record, move(completion));
|
||||
return iterator_close(global_object, iterator_record, move(completion));
|
||||
}
|
||||
// iii. Append nextValue to the end of the List values.
|
||||
values.append(next_value);
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -486,7 +486,7 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
|
|||
VERIFY(calendar->identifier() == "iso8601"sv);
|
||||
|
||||
// 4. Let iteratorRecord be ? Getiterator(fields, sync).
|
||||
auto* iterator_record = TRY(get_iterator(global_object, fields, IteratorHint::Sync));
|
||||
auto iterator_record = TRY(get_iterator(global_object, fields, IteratorHint::Sync));
|
||||
|
||||
// 5. Let fieldNames be a new empty List.
|
||||
auto field_names = MarkedValueList { vm.heap() };
|
||||
|
|
@ -495,7 +495,7 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
|
|||
// 7. Repeat, while next is not false,
|
||||
while (true) {
|
||||
// a. Set next to ? IteratorStep(iteratorRecord).
|
||||
auto* next = TRY(iterator_step(global_object, *iterator_record));
|
||||
auto* next = TRY(iterator_step(global_object, iterator_record));
|
||||
|
||||
// b. If next is not false, then
|
||||
if (!next)
|
||||
|
|
@ -510,7 +510,7 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
|
|||
auto completion = vm.throw_completion<TypeError>(global_object, ErrorType::TemporalInvalidCalendarFieldValue, next_value.to_string_without_side_effects());
|
||||
|
||||
// 2. Return ? IteratorClose(iteratorRecord, completion).
|
||||
return TRY(iterator_close(*iterator_record, move(completion)));
|
||||
return TRY(iterator_close(global_object, iterator_record, move(completion)));
|
||||
}
|
||||
|
||||
// iii. If fieldNames contains nextValue, then
|
||||
|
|
@ -519,7 +519,7 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
|
|||
auto completion = vm.throw_completion<RangeError>(global_object, ErrorType::TemporalDuplicateCalendarField, next_value.as_string().string());
|
||||
|
||||
// 2. Return ? IteratorClose(iteratorRecord, completion).
|
||||
return TRY(iterator_close(*iterator_record, move(completion)));
|
||||
return TRY(iterator_close(global_object, iterator_record, move(completion)));
|
||||
}
|
||||
|
||||
// iv. If nextValue is not one of "year", "month", "monthCode", "day", "hour", "minute", "second", "millisecond", "microsecond", "nanosecond", then
|
||||
|
|
@ -528,7 +528,7 @@ JS_DEFINE_NATIVE_FUNCTION(CalendarPrototype::fields)
|
|||
auto completion = vm.throw_completion<RangeError>(global_object, ErrorType::TemporalInvalidCalendarFieldName, next_value.as_string().string());
|
||||
|
||||
// 2. Return ? IteratorClose(iteratorRecord, completion).
|
||||
return TRY(iterator_close(*iterator_record, move(completion)));
|
||||
return TRY(iterator_close(global_object, iterator_record, move(completion)));
|
||||
}
|
||||
|
||||
// v. Append nextValue to the end of the List fieldNames.
|
||||
|
|
|
|||
|
|
@ -1,5 +1,5 @@
|
|||
/*
|
||||
* Copyright (c) 2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
*/
|
||||
|
|
@ -612,7 +612,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
|
|||
auto possible_instants = TRY(time_zone.invoke(global_object, vm.names.getPossibleInstantsFor, &date_time));
|
||||
|
||||
// 3. Let iteratorRecord be ? GetIterator(possibleInstants, sync).
|
||||
auto* iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
|
||||
auto iterator = TRY(get_iterator(global_object, possible_instants, IteratorHint::Sync));
|
||||
|
||||
// 4. Let list be a new empty List.
|
||||
auto list = MarkedValueList { vm.heap() };
|
||||
|
|
@ -623,7 +623,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
|
|||
// 6. Repeat, while next is not false,
|
||||
do {
|
||||
// a. Set next to ? IteratorStep(iteratorRecord).
|
||||
next = TRY(iterator_step(global_object, *iterator));
|
||||
next = TRY(iterator_step(global_object, iterator));
|
||||
|
||||
// b. If next is not false, then
|
||||
if (next) {
|
||||
|
|
@ -636,7 +636,7 @@ ThrowCompletionOr<MarkedValueList> get_possible_instants_for(GlobalObject& globa
|
|||
auto completion = vm.throw_completion<TypeError>(global_object, ErrorType::NotAnObjectOfType, "Temporal.Instant");
|
||||
|
||||
// 2. Return ? IteratorClose(iteratorRecord, completion).
|
||||
return iterator_close(*iterator, move(completion));
|
||||
return iterator_close(global_object, iterator, move(completion));
|
||||
}
|
||||
|
||||
// iii. Append nextValue to the end of the List list.
|
||||
|
|
|
|||
|
|
@ -197,18 +197,17 @@ ThrowCompletionOr<void> VM::binding_initialization(NonnullRefPtr<BindingPattern>
|
|||
// BindingPattern : ArrayBindingPattern
|
||||
else {
|
||||
// 1. Let iteratorRecord be ? GetIterator(value).
|
||||
auto* iterator = TRY(get_iterator(global_object, value));
|
||||
auto iterator_done = false;
|
||||
auto iterator_record = TRY(get_iterator(global_object, value));
|
||||
|
||||
// 2. Let result be IteratorBindingInitialization of ArrayBindingPattern with arguments iteratorRecord and environment.
|
||||
auto result = iterator_binding_initialization(*target, iterator, iterator_done, environment, global_object);
|
||||
auto result = iterator_binding_initialization(*target, iterator_record, environment, global_object);
|
||||
|
||||
// 3. If iteratorRecord.[[Done]] is false, return ? IteratorClose(iteratorRecord, result).
|
||||
if (!iterator_done) {
|
||||
if (!iterator_record.done) {
|
||||
// iterator_close() always returns a Completion, which ThrowCompletionOr will interpret as a throw
|
||||
// completion. So only return the result of iterator_close() if it is indeed a throw completion.
|
||||
auto completion = result.is_throw_completion() ? result.release_error() : normal_completion({});
|
||||
if (completion = iterator_close(*iterator, move(completion)); completion.is_error())
|
||||
if (completion = iterator_close(global_object, iterator_record, move(completion)); completion.is_error())
|
||||
return completion.release_error();
|
||||
}
|
||||
|
||||
|
|
@ -311,7 +310,7 @@ ThrowCompletionOr<void> VM::property_binding_initialization(BindingPattern const
|
|||
|
||||
// 13.15.5.5 Runtime Semantics: IteratorDestructuringAssignmentEvaluation, https://tc39.es/ecma262/#sec-runtime-semantics-iteratordestructuringassignmentevaluation
|
||||
// 8.5.3 Runtime Semantics: IteratorBindingInitialization, https://tc39.es/ecma262/#sec-runtime-semantics-iteratorbindinginitialization
|
||||
ThrowCompletionOr<void> VM::iterator_binding_initialization(BindingPattern const& binding, Object* iterator, bool& iterator_done, Environment* environment, GlobalObject& global_object)
|
||||
ThrowCompletionOr<void> VM::iterator_binding_initialization(BindingPattern const& binding, Iterator& iterator_record, Environment* environment, GlobalObject& global_object)
|
||||
{
|
||||
// FIXME: this method is nearly identical to destructuring assignment!
|
||||
for (size_t i = 0; i < binding.entries.size(); i++) {
|
||||
|
|
@ -328,51 +327,97 @@ ThrowCompletionOr<void> VM::iterator_binding_initialization(BindingPattern const
|
|||
return TRY(member_expression->to_reference(interpreter(), global_object));
|
||||
}));
|
||||
|
||||
// BindingRestElement : ... BindingIdentifier
|
||||
// BindingRestElement : ... BindingPattern
|
||||
if (entry.is_rest) {
|
||||
VERIFY(i == binding.entries.size() - 1);
|
||||
|
||||
// 2. Let A be ! ArrayCreate(0).
|
||||
auto* array = MUST(Array::create(global_object, 0));
|
||||
while (!iterator_done) {
|
||||
auto next_object_or_error = iterator_next(*iterator);
|
||||
if (next_object_or_error.is_throw_completion()) {
|
||||
iterator_done = true;
|
||||
return JS::throw_completion(*next_object_or_error.release_error().value());
|
||||
}
|
||||
auto* next_object = next_object_or_error.release_value();
|
||||
|
||||
auto done_property = TRY(next_object->get(names.done));
|
||||
if (done_property.to_boolean()) {
|
||||
iterator_done = true;
|
||||
// 3. Let n be 0.
|
||||
// 4. Repeat,
|
||||
while (true) {
|
||||
ThrowCompletionOr<Object*> next { nullptr };
|
||||
|
||||
// a. If iteratorRecord.[[Done]] is false, then
|
||||
if (!iterator_record.done) {
|
||||
// i. Let next be IteratorStep(iteratorRecord).
|
||||
next = iterator_step(global_object, iterator_record);
|
||||
|
||||
// ii. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// iii. ReturnIfAbrupt(next).
|
||||
if (next.is_error()) {
|
||||
iterator_record.done = true;
|
||||
return next.release_error();
|
||||
}
|
||||
|
||||
// iv. If next is false, set iteratorRecord.[[Done]] to true.
|
||||
if (!next.value())
|
||||
iterator_record.done = true;
|
||||
}
|
||||
|
||||
// b. If iteratorRecord.[[Done]] is true, then
|
||||
if (iterator_record.done) {
|
||||
// NOTE: Step i. and ii. are handled below.
|
||||
break;
|
||||
}
|
||||
|
||||
auto next_value = TRY(next_object->get(names.value));
|
||||
array->indexed_properties().append(next_value);
|
||||
// c. Let nextValue be IteratorValue(next).
|
||||
auto next_value = iterator_value(global_object, *next.value());
|
||||
|
||||
// d. If nextValue is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// e. ReturnIfAbrupt(nextValue).
|
||||
if (next_value.is_error()) {
|
||||
iterator_record.done = true;
|
||||
return next_value.release_error();
|
||||
}
|
||||
|
||||
// f. Perform ! CreateDataPropertyOrThrow(A, ! ToString(𝔽(n)), nextValue).
|
||||
array->indexed_properties().append(next_value.value());
|
||||
|
||||
// g. Set n to n + 1.
|
||||
}
|
||||
value = array;
|
||||
|
||||
} else if (!iterator_done) {
|
||||
auto next_object_or_error = iterator_next(*iterator);
|
||||
if (next_object_or_error.is_throw_completion()) {
|
||||
iterator_done = true;
|
||||
return JS::throw_completion(*next_object_or_error.release_error().value());
|
||||
}
|
||||
auto* next_object = next_object_or_error.release_value();
|
||||
|
||||
auto done_property = TRY(next_object->get(names.done));
|
||||
if (done_property.to_boolean()) {
|
||||
iterator_done = true;
|
||||
value = js_undefined();
|
||||
} else {
|
||||
auto value_or_error = next_object->get(names.value);
|
||||
if (value_or_error.is_throw_completion()) {
|
||||
iterator_done = true;
|
||||
return JS::throw_completion(*value_or_error.release_error().value());
|
||||
}
|
||||
value = value_or_error.release_value();
|
||||
}
|
||||
} else {
|
||||
}
|
||||
// SingleNameBinding : BindingIdentifier Initializer[opt]
|
||||
// BindingElement : BindingPattern Initializer[opt]
|
||||
else {
|
||||
// 1. Let v be undefined.
|
||||
value = js_undefined();
|
||||
|
||||
// 2. If iteratorRecord.[[Done]] is false, then
|
||||
if (!iterator_record.done) {
|
||||
// a. Let next be IteratorStep(iteratorRecord).
|
||||
auto next = iterator_step(global_object, iterator_record);
|
||||
|
||||
// b. If next is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// c. ReturnIfAbrupt(next).
|
||||
if (next.is_error()) {
|
||||
iterator_record.done = true;
|
||||
return next.release_error();
|
||||
}
|
||||
|
||||
// d. If next is false, set iteratorRecord.[[Done]] to true.
|
||||
if (!next.value()) {
|
||||
iterator_record.done = true;
|
||||
}
|
||||
// e. Else,
|
||||
else {
|
||||
// i. Set v to IteratorValue(next).
|
||||
auto value_or_error = iterator_value(global_object, *next.value());
|
||||
|
||||
// ii. If v is an abrupt completion, set iteratorRecord.[[Done]] to true.
|
||||
// iii. ReturnIfAbrupt(v).
|
||||
if (value_or_error.is_throw_completion()) {
|
||||
iterator_record.done = true;
|
||||
return value_or_error.release_error();
|
||||
}
|
||||
value = value_or_error.release_value();
|
||||
}
|
||||
}
|
||||
|
||||
// NOTE: Step 3. and 4. are handled below.
|
||||
}
|
||||
|
||||
if (value.is_undefined() && entry.initializer) {
|
||||
|
|
|
|||
|
|
@ -1,6 +1,6 @@
|
|||
/*
|
||||
* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
|
||||
* Copyright (c) 2020-2021, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2020-2022, Linus Groh <linusg@serenityos.org>
|
||||
* Copyright (c) 2021, David Tuin <davidot@serenityos.org>
|
||||
*
|
||||
* SPDX-License-Identifier: BSD-2-Clause
|
||||
|
|
@ -21,6 +21,7 @@
|
|||
#include <LibJS/Runtime/ErrorTypes.h>
|
||||
#include <LibJS/Runtime/Exception.h>
|
||||
#include <LibJS/Runtime/ExecutionContext.h>
|
||||
#include <LibJS/Runtime/Iterator.h>
|
||||
#include <LibJS/Runtime/MarkedValueList.h>
|
||||
#include <LibJS/Runtime/Promise.h>
|
||||
#include <LibJS/Runtime/Value.h>
|
||||
|
|
@ -244,7 +245,7 @@ private:
|
|||
[[nodiscard]] ThrowCompletionOr<Value> call_internal(FunctionObject&, Value this_value, Optional<MarkedValueList> arguments);
|
||||
|
||||
ThrowCompletionOr<void> property_binding_initialization(BindingPattern const& binding, Value value, Environment* environment, GlobalObject& global_object);
|
||||
ThrowCompletionOr<void> iterator_binding_initialization(BindingPattern const& binding, Object* iterator, bool& iterator_done, Environment* environment, GlobalObject& global_object);
|
||||
ThrowCompletionOr<void> iterator_binding_initialization(BindingPattern const& binding, Iterator& iterator_record, Environment* environment, GlobalObject& global_object);
|
||||
|
||||
Exception* m_exception { nullptr };
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue