mirror of
https://github.com/bolero-MURAKAMI/Sprout.git
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251 lines
8 KiB
C++
251 lines
8 KiB
C++
/*=============================================================================
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Copyright (c) 2011-2014 Bolero MURAKAMI
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https://github.com/bolero-MURAKAMI/Sprout
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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=============================================================================*/
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#ifndef SPROUT_ARRAY_ARRAY_HPP
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#define SPROUT_ARRAY_ARRAY_HPP
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#include <utility>
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#include <type_traits>
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#include <stdexcept>
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#include <sprout/config.hpp>
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#include <sprout/workaround/std/cstddef.hpp>
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#include <sprout/index_tuple/metafunction.hpp>
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#include <sprout/container/traits.hpp>
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#include <sprout/container/functions.hpp>
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#include <sprout/iterator/operation.hpp>
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#include <sprout/iterator/reverse_iterator.hpp>
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#include <sprout/algorithm/cxx14/copy.hpp>
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#include <sprout/algorithm/cxx14/move.hpp>
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#include <sprout/algorithm/cxx14/fill_n.hpp>
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#include <sprout/algorithm/cxx14/swap_ranges.hpp>
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#include <sprout/utility/swap.hpp>
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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# include <sprout/iterator/index_iterator.hpp>
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#endif
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namespace sprout {
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//
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// array
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//
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template<typename T, std::size_t N>
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class array {
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public:
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typedef T value_type;
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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typedef sprout::index_iterator<array&, true> iterator;
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typedef sprout::index_iterator<array const&, true> const_iterator;
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#else
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typedef T* iterator;
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typedef T const* const_iterator;
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#endif
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typedef T& reference;
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typedef T const& const_reference;
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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typedef T* pointer;
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typedef T const* const_pointer;
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typedef sprout::reverse_iterator<iterator> reverse_iterator;
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typedef sprout::reverse_iterator<const_iterator> const_reverse_iterator;
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public:
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SPROUT_STATIC_CONSTEXPR size_type static_size = N;
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private:
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template<sprout::index_t Index>
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static SPROUT_CONSTEXPR value_type const&
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dummy_get(value_type const& value) {
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return value;
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}
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template<sprout::index_t... Indexes>
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static SPROUT_CONSTEXPR array
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fill_impl(value_type const& value, sprout::index_tuple<Indexes...>) {
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return array{{dummy_get<Indexes>(value)...}};
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}
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public:
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value_type elems[static_size ? static_size : 1];
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public:
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// construct/copy/destroy:
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template<typename T2>
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SPROUT_CXX14_CONSTEXPR array& operator=(array<T2, N> const& rhs) {
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sprout::copy(rhs.begin(), rhs.end(), begin());
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return *this;
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}
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template<typename T2>
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SPROUT_CXX14_CONSTEXPR array& operator=(array<T2, N>&& rhs) {
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sprout::move(rhs.begin(), rhs.end(), begin());
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return *this;
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}
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// modifiers:
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SPROUT_CXX14_CONSTEXPR void fill(const_reference value) {
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sprout::fill_n(begin(), size(), value);
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}
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SPROUT_CONSTEXPR array fill(const_reference value) const {
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return fill_impl(value, sprout::index_n<0, N>::make());
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}
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SPROUT_CXX14_CONSTEXPR void assign(const_reference value) {
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fill(value);
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}
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SPROUT_CONSTEXPR array assign(const_reference value) const {
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return fill(value);
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}
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SPROUT_CXX14_CONSTEXPR void swap(array& other)
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SPROUT_NOEXCEPT_IF_EXPR(sprout::swap(std::declval<T&>(), std::declval<T&>()))
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{
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sprout::swap_ranges(other.begin(), other.end(), begin());
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}
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// iterators:
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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SPROUT_CXX14_CONSTEXPR iterator begin() SPROUT_NOEXCEPT {
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return iterator(*this, 0);
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}
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SPROUT_CONSTEXPR const_iterator begin() const SPROUT_NOEXCEPT {
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return const_iterator(*this, 0);
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}
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SPROUT_CXX14_CONSTEXPR iterator end() SPROUT_NOEXCEPT {
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return iterator(*this, size());
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}
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SPROUT_CONSTEXPR const_iterator end() const SPROUT_NOEXCEPT {
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return const_iterator(*this, size());
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}
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#else
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SPROUT_CXX14_CONSTEXPR iterator begin() SPROUT_NOEXCEPT {
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return &elems[0];
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}
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SPROUT_CONSTEXPR const_iterator begin() const SPROUT_NOEXCEPT {
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return &elems[0];
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}
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SPROUT_CXX14_CONSTEXPR iterator end() SPROUT_NOEXCEPT {
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return &elems[0] + size();
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}
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SPROUT_CONSTEXPR const_iterator end() const SPROUT_NOEXCEPT {
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return &elems[0] + size();
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}
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#endif
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SPROUT_CXX14_CONSTEXPR reverse_iterator rbegin() SPROUT_NOEXCEPT {
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return reverse_iterator(end());
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}
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SPROUT_CONSTEXPR const_reverse_iterator rbegin() const SPROUT_NOEXCEPT {
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return const_reverse_iterator(end());
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}
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SPROUT_CXX14_CONSTEXPR reverse_iterator rend() SPROUT_NOEXCEPT {
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return reverse_iterator(begin());
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}
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SPROUT_CONSTEXPR const_reverse_iterator rend() const SPROUT_NOEXCEPT {
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return const_reverse_iterator(begin());
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}
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#if SPROUT_USE_INDEX_ITERATOR_IMPLEMENTATION
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SPROUT_CONSTEXPR const_iterator cbegin() const SPROUT_NOEXCEPT {
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return const_iterator(*this, 0);
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}
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SPROUT_CONSTEXPR const_iterator cend() const SPROUT_NOEXCEPT {
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return const_iterator(*this, size());
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}
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#else
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SPROUT_CONSTEXPR const_iterator cbegin() const SPROUT_NOEXCEPT {
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return &elems[0];
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}
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SPROUT_CONSTEXPR const_iterator cend() const SPROUT_NOEXCEPT {
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return &elems[0] + size();
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}
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#endif
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SPROUT_CONSTEXPR const_reverse_iterator crbegin() const SPROUT_NOEXCEPT {
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return const_reverse_iterator(end());
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}
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SPROUT_CONSTEXPR const_reverse_iterator crend() const SPROUT_NOEXCEPT {
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return const_reverse_iterator(begin());
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}
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// capacity:
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SPROUT_CONSTEXPR size_type size() const SPROUT_NOEXCEPT {
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return static_size;
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}
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SPROUT_CONSTEXPR size_type max_size() const SPROUT_NOEXCEPT {
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return size();
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}
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SPROUT_CONSTEXPR bool empty() const SPROUT_NOEXCEPT {
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return size() == 0;
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}
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// element access:
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SPROUT_CXX14_CONSTEXPR reference operator[](size_type i) {
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return elems[i];
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}
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SPROUT_CONSTEXPR const_reference operator[](size_type i) const {
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return elems[i];
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}
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SPROUT_CXX14_CONSTEXPR reference at(size_type i) {
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return i < size()
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? elems[i]
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: (throw std::out_of_range("array<>: index out of range"), elems[i])
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;
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}
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SPROUT_CONSTEXPR const_reference at(size_type i) const {
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return i < size()
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? elems[i]
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: (throw std::out_of_range("array<>: index out of range"), elems[i])
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;
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}
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SPROUT_CXX14_CONSTEXPR reference front() {
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return elems[0];
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}
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SPROUT_CONSTEXPR const_reference front() const {
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return elems[0];
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}
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SPROUT_CXX14_CONSTEXPR reference back() {
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return elems[size() - 1];
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}
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SPROUT_CONSTEXPR const_reference back() const {
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return elems[size() - 1];
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}
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SPROUT_CXX14_CONSTEXPR pointer data() SPROUT_NOEXCEPT {
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return &elems[0];
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}
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SPROUT_CONSTEXPR const_pointer data() const SPROUT_NOEXCEPT {
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return &elems[0];
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}
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SPROUT_CXX14_CONSTEXPR pointer c_array() SPROUT_NOEXCEPT {
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return data();
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}
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SPROUT_CONSTEXPR const_pointer c_array() const SPROUT_NOEXCEPT {
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return data();
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}
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// others:
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SPROUT_CXX14_CONSTEXPR void rangecheck(size_type i) const {
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if (i >= size()) {
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throw std::out_of_range("array<>: index out of range");
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}
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}
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};
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template<typename T, std::size_t N>
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SPROUT_CONSTEXPR_OR_CONST typename sprout::array<T, N>::size_type sprout::array<T, N>::static_size;
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//
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// swap
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//
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template<typename T, std::size_t N>
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inline SPROUT_CXX14_CONSTEXPR void
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swap(sprout::array<T, N>& lhs, sprout::array<T, N>& rhs)
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SPROUT_NOEXCEPT_IF_EXPR(lhs.swap(rhs))
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{
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lhs.swap(rhs);
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}
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namespace detail {
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template<typename T, std::size_t N, sprout::index_t... Indexes>
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inline SPROUT_CONSTEXPR sprout::array<typename std::remove_cv<T>::type, N>
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to_array_impl(T (& arr)[N], sprout::index_tuple<Indexes...>) {
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return sprout::array<typename std::remove_cv<T>::type, N>{{arr[Indexes]...}};
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}
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} // namespace detail
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//
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// to_array
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//
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template<typename T, std::size_t N>
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inline SPROUT_CONSTEXPR sprout::array<typename std::remove_cv<T>::type, N>
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to_array(T (& arr)[N]) {
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return sprout::detail::to_array_impl(arr, sprout::make_index_tuple<N>::make());
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}
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} // namespace sprout
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#endif // #ifndef SPROUT_ARRAY_ARRAY_HPP
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