5927cdd9c5
This doesn't matter per se as the value is immediately validated to be in the 0 to 2^32 - 1 range, but it avoids having to cast a number that potentially doesn't fit into a size_t into one at the call site. More often than not, array-like lengths are only validated to be <= 2^52 - 1, i.e. MAX_SAFE_INTEGER. This is fully backwards compatible with existing code as a size_t always fits into an u64, but an u64 might not always fit into a size_t.
57 lines
2.1 KiB
C++
57 lines
2.1 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@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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#pragma once
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#include <AK/Assertions.h>
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#include <AK/Function.h>
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#include <AK/Span.h>
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#include <AK/Vector.h>
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#include <LibJS/Runtime/Completion.h>
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#include <LibJS/Runtime/GlobalObject.h>
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#include <LibJS/Runtime/Object.h>
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namespace JS {
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class Array : public Object {
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JS_OBJECT(Array, Object);
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public:
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static ThrowCompletionOr<Array*> create(GlobalObject&, u64 length, Object* prototype = nullptr);
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static Array* create_from(GlobalObject&, Vector<Value> const&);
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// Non-standard but equivalent to CreateArrayFromList.
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template<typename T>
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static Array* create_from(GlobalObject& global_object, Span<T const> elements, Function<Value(T const&)> map_fn)
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{
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auto values = MarkedVector<Value> { global_object.heap() };
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values.ensure_capacity(elements.size());
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for (auto const& element : elements)
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values.append(map_fn(element));
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return Array::create_from(global_object, values);
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}
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explicit Array(Object& prototype);
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virtual ~Array() override = default;
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virtual ThrowCompletionOr<Optional<PropertyDescriptor>> internal_get_own_property(PropertyKey const&) const override;
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virtual ThrowCompletionOr<bool> internal_define_own_property(PropertyKey const&, PropertyDescriptor const&) override;
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virtual ThrowCompletionOr<bool> internal_delete(PropertyKey const&) override;
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virtual ThrowCompletionOr<MarkedVector<Value>> internal_own_property_keys() const override;
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[[nodiscard]] bool length_is_writable() const { return m_length_writable; };
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private:
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ThrowCompletionOr<bool> set_length(PropertyDescriptor const&);
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bool m_length_writable { true };
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};
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ThrowCompletionOr<double> compare_array_elements(GlobalObject&, Value x, Value y, FunctionObject* comparefn);
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ThrowCompletionOr<MarkedVector<Value>> sort_indexed_properties(GlobalObject&, Object const&, size_t length, Function<ThrowCompletionOr<double>(Value, Value)> const& sort_compare, bool skip_holes);
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}
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