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ladybird/Userland/Libraries/LibJS/Runtime/ArrayIterator.cpp

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LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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/*
Userland: Use mattco@serenityos.org for my copyright headers
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* Copyright (c) 2020, Matthew Olsson <mattco@serenityos.org>
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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*
Everything: Move to SPDX license identifiers in all files. SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
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* SPDX-License-Identifier: BSD-2-Clause
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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*/
#include <LibJS/Runtime/ArrayIterator.h>
#include <LibJS/Runtime/GlobalObject.h>
namespace JS {
LibJS: Convert ArrayIterator::create() to NonnullGCPtr
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NonnullGCPtr<ArrayIterator> ArrayIterator::create(Realm& realm, Value array, Object::PropertyKind iteration_kind)
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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{
LibJS: Make Heap::allocate<T>() infallible Stop worrying about tiny OOMs. Work towards #20449. While going through these, I also changed the function signature in many places where returning ThrowCompletionOr<T> is no longer necessary.
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return realm.heap().allocate<ArrayIterator>(realm, array, iteration_kind, realm.intrinsics().array_iterator_prototype());
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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}
LibJS: Consistently make prototype the last argument in Object ctors This is so that we can reliably allocate them in a template function, e.g. in ordinary_create_from_constructor(): global_object.heap().allocate<T>( global_object, forward<Args>(args)..., *prototype); The majority of objects already take the prototype as the last argument, so I updated the ones that didn't.
2021-06-19 23:21:08 +01:00
ArrayIterator::ArrayIterator(Value array, Object::PropertyKind iteration_kind, Object& prototype)
LibJS: Remove Object(Object& prototype) footgun This constructor was easily confused with a copy constructor, and it was possible to accidentally copy-construct Objects in at least one way that we dicovered (via generic ThrowCompletionOr construction). This patch adds a mandatory ConstructWithPrototypeTag parameter to the constructor to disambiguate it.
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: Object(ConstructWithPrototypeTag::Tag, prototype)
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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, m_array(array)
, m_iteration_kind(iteration_kind)
{
}
LibJS: Rename Cell::visit_children() => Cell::visit_edges() The GC heap is really a graph of cells, so "children" didn't quite feel appropriate here.
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void ArrayIterator::visit_edges(Cell::Visitor& visitor)
LibJS: ArrayIterator needs to mark the array it's iterating
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{
LibJS: Rename Cell::visit_children() => Cell::visit_edges() The GC heap is really a graph of cells, so "children" didn't quite feel appropriate here.
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Base::visit_edges(visitor);
LibJS: ArrayIterator needs to mark the array it's iterating
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visitor.visit(m_array);
}
LibJS: Start implementing iterable framework, add ArrayIterator With the addition of symbol keys, work can now be done on starting to implement the well-known symbol functionality. The most important of these well-known symbols is by far Symbol.iterator. This patch adds IteratorPrototype, as well as ArrayIterator and ArrayIteratorPrototype. In the future, sometime after StringIterator has also been added, this will allow us to use Symbol.iterator directly in for..of loops, enabling the use of custom iterator objects. Also makes adding iterator support to native objects much easier (as will have to be done for Map and Set, when they get added).
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}
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