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105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <AK/Iterator.h>
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#include <AK/Span.h>
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namespace AK {
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template<typename T, size_t Size>
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struct Array {
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constexpr const T* data() const { return __data; }
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constexpr T* data() { return __data; }
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constexpr size_t size() const { return Size; }
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constexpr Span<const T> span() const { return { __data, Size }; }
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constexpr Span<T> span() { return { __data, Size }; }
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constexpr const T& at(size_t index) const
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{
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ASSERT(index < size());
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return (*this)[index];
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}
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constexpr T& at(size_t index)
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{
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ASSERT(index < size());
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return (*this)[index];
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}
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constexpr const T& front() const { return at(0); }
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constexpr T& front() { return at(0); }
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constexpr const T& back() const { return at(max(1, size()) - 1); }
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constexpr T& back() { return at(max(1, size()) - 1); }
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constexpr bool is_empty() const { return size() == 0; }
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constexpr const T& operator[](size_t index) const { return __data[index]; }
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constexpr T& operator[](size_t index) { return __data[index]; }
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template<typename T2, size_t Size2>
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constexpr bool operator==(const Array<T2, Size2>& other) const { return span() == other.span(); }
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using ConstIterator = SimpleIterator<const Array, const T>;
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using Iterator = SimpleIterator<Array, T>;
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constexpr ConstIterator begin() const { return ConstIterator::begin(*this); }
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constexpr Iterator begin() { return Iterator::begin(*this); }
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constexpr ConstIterator end() const { return ConstIterator::end(*this); }
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constexpr Iterator end() { return Iterator::end(*this); }
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constexpr operator Span<const T>() const { return span(); }
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constexpr operator Span<T>() { return span(); }
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T __data[Size];
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};
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template<typename T, typename... Types>
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Array(T, Types...) -> Array<T, sizeof...(Types) + 1>;
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namespace Detail {
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template<typename T, unsigned long... Is>
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constexpr auto integer_sequence_generate_array([[maybe_unused]] const T offset, IntegerSequence<T, Is...>) -> Array<T, sizeof...(Is)>
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{
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return { { (offset + Is)... } };
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}
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}
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template<typename T, T N>
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constexpr static auto iota_array(const T offset = {})
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{
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static_assert(N >= T {}, "Negative sizes not allowed in iota_array()");
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return Detail::integer_sequence_generate_array<T>(offset, MakeIntegerSequence<T, N>());
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}
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}
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using AK::Array;
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using AK::iota_array;
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