Gabor Kelemen
c1946a911f
Change-Id: Ied0d3675a517df858d4d50340abb53636b2d450f Reviewed-on: https://gerrit.libreoffice.org/c/core/+/192746 Tested-by: Jenkins Reviewed-by: Gabor Kelemen <gabor.kelemen@collabora.com>
85 lines
2.8 KiB
C++
85 lines
2.8 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#ifndef INCLUDED_O3TL_ENUMARRAY_HXX
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#define INCLUDED_O3TL_ENUMARRAY_HXX
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#include <utility>
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#include <array>
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#include <cstddef>
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#include <concepts>
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namespace o3tl {
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///
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/// This is a container convenience class for arrays indexed by enum values.
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///
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/// This assumes that the 'enum class' definition
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/// - starts at zero
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/// - has no holes in its sequence of values
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/// - defines a value called LAST which refers to the greatest constant.
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///
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/// \param E the 'enum class' type.
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/// \param V the value type to be stored in the array
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template<typename E, typename V>
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class enumarray final
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{
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public:
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typedef V value_type;
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typedef E key_type;
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typedef size_t size_type;
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static constexpr size_type size() { return static_cast<size_type>(E::LAST) + 1; };
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typedef typename std::array<V, size()>::iterator iterator;
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typedef typename std::array<V, size()>::const_iterator const_iterator;
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template <std::convertible_to<V>... T>
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requires(sizeof...(T) == size())
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constexpr enumarray(T&&... args)
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: values{ std::forward<T>(args)... }
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{
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}
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// coverity[uninit_ctor] - by design:
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enumarray() {}
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constexpr const V& operator[](E key) const { return values[static_cast<size_type>(key)]; }
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constexpr V& operator[](E key) { return values[static_cast<size_type>(key)]; }
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constexpr void fill(const V& val) { values.fill(val); }
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constexpr iterator begin() { return values.begin(); }
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constexpr iterator end() { return values.end(); }
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constexpr const_iterator begin() const { return values.begin(); }
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constexpr const_iterator end() const { return values.end(); }
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constexpr V* data() { return values.data(); }
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private:
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std::array<V, size()> values;
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};
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}; // namespace o3tl
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#endif /* INCLUDED_O3TL_ENUMARRAY_HXX */
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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