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| // <array> -*- C++ -*- |
| |
| // Copyright (C) 2007-2015 Free Software Foundation, Inc. |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 3, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // Under Section 7 of GPL version 3, you are granted additional |
| // permissions described in the GCC Runtime Library Exception, version |
| // 3.1, as published by the Free Software Foundation. |
| |
| // You should have received a copy of the GNU General Public License and |
| // a copy of the GCC Runtime Library Exception along with this program; |
| // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
| // <http://www.gnu.org/licenses/>. |
| |
| /** @file include/array |
| * This is a Standard C++ Library header. |
| */ |
| |
| #ifndef _GLIBCXX_ARRAY |
| #define _GLIBCXX_ARRAY 1 |
| |
| #pragma GCC system_header |
| |
| #if __cplusplus < 201103L |
| # include <bits/c++0x_warning.h> |
| #else |
| |
| #include <stdexcept> |
| #include <bits/stl_algobase.h> |
| #include <bits/range_access.h> |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_CONTAINER |
| |
| template<typename _Tp, std::size_t _Nm> |
| struct __array_traits |
| { |
| typedef _Tp _Type[_Nm]; |
| |
| static constexpr _Tp& |
| _S_ref(const _Type& __t, std::size_t __n) noexcept |
| { return const_cast<_Tp&>(__t[__n]); } |
| |
| static constexpr _Tp* |
| _S_ptr(const _Type& __t) noexcept |
| { return const_cast<_Tp*>(__t); } |
| }; |
| |
| template<typename _Tp> |
| struct __array_traits<_Tp, 0> |
| { |
| struct _Type { }; |
| |
| static constexpr _Tp& |
| _S_ref(const _Type&, std::size_t) noexcept |
| { return *static_cast<_Tp*>(nullptr); } |
| |
| static constexpr _Tp* |
| _S_ptr(const _Type&) noexcept |
| { return nullptr; } |
| }; |
| |
| /** |
| * @brief A standard container for storing a fixed size sequence of elements. |
| * |
| * @ingroup sequences |
| * |
| * Meets the requirements of a <a href="tables.html#65">container</a>, a |
| * <a href="tables.html#66">reversible container</a>, and a |
| * <a href="tables.html#67">sequence</a>. |
| * |
| * Sets support random access iterators. |
| * |
| * @tparam Tp Type of element. Required to be a complete type. |
| * @tparam N Number of elements. |
| */ |
| template<typename _Tp, std::size_t _Nm> |
| struct array |
| { |
| typedef _Tp value_type; |
| typedef value_type* pointer; |
| typedef const value_type* const_pointer; |
| typedef value_type& reference; |
| typedef const value_type& const_reference; |
| typedef value_type* iterator; |
| typedef const value_type* const_iterator; |
| typedef std::size_t size_type; |
| typedef std::ptrdiff_t difference_type; |
| typedef std::reverse_iterator<iterator> reverse_iterator; |
| typedef std::reverse_iterator<const_iterator> const_reverse_iterator; |
| |
| // Support for zero-sized arrays mandatory. |
| typedef _GLIBCXX_STD_C::__array_traits<_Tp, _Nm> _AT_Type; |
| typename _AT_Type::_Type _M_elems; |
| |
| // No explicit construct/copy/destroy for aggregate type. |
| |
| // DR 776. |
| void |
| fill(const value_type& __u) |
| { std::fill_n(begin(), size(), __u); } |
| |
| void |
| swap(array& __other) |
| noexcept(noexcept(swap(std::declval<_Tp&>(), std::declval<_Tp&>()))) |
| { std::swap_ranges(begin(), end(), __other.begin()); } |
| |
| // Iterators. |
| iterator |
| begin() noexcept |
| { return iterator(data()); } |
| |
| const_iterator |
| begin() const noexcept |
| { return const_iterator(data()); } |
| |
| iterator |
| end() noexcept |
| { return iterator(data() + _Nm); } |
| |
| const_iterator |
| end() const noexcept |
| { return const_iterator(data() + _Nm); } |
| |
| reverse_iterator |
| rbegin() noexcept |
| { return reverse_iterator(end()); } |
| |
| const_reverse_iterator |
| rbegin() const noexcept |
| { return const_reverse_iterator(end()); } |
| |
| reverse_iterator |
| rend() noexcept |
| { return reverse_iterator(begin()); } |
| |
| const_reverse_iterator |
| rend() const noexcept |
| { return const_reverse_iterator(begin()); } |
| |
| const_iterator |
| cbegin() const noexcept |
| { return const_iterator(data()); } |
| |
| const_iterator |
| cend() const noexcept |
| { return const_iterator(data() + _Nm); } |
| |
| const_reverse_iterator |
| crbegin() const noexcept |
| { return const_reverse_iterator(end()); } |
| |
| const_reverse_iterator |
| crend() const noexcept |
| { return const_reverse_iterator(begin()); } |
| |
| // Capacity. |
| constexpr size_type |
| size() const noexcept { return _Nm; } |
| |
| constexpr size_type |
| max_size() const noexcept { return _Nm; } |
| |
| constexpr bool |
| empty() const noexcept { return size() == 0; } |
| |
| // Element access. |
| reference |
| operator[](size_type __n) noexcept |
| { return _AT_Type::_S_ref(_M_elems, __n); } |
| |
| constexpr const_reference |
| operator[](size_type __n) const noexcept |
| { return _AT_Type::_S_ref(_M_elems, __n); } |
| |
| reference |
| at(size_type __n) |
| { |
| if (__n >= _Nm) |
| std::__throw_out_of_range_fmt(__N("array::at: __n (which is %zu) " |
| ">= _Nm (which is %zu)"), |
| __n, _Nm); |
| return _AT_Type::_S_ref(_M_elems, __n); |
| } |
| |
| constexpr const_reference |
| at(size_type __n) const |
| { |
| // Result of conditional expression must be an lvalue so use |
| // boolean ? lvalue : (throw-expr, lvalue) |
| return __n < _Nm ? _AT_Type::_S_ref(_M_elems, __n) |
| : (std::__throw_out_of_range_fmt(__N("array::at: __n (which is %zu) " |
| ">= _Nm (which is %zu)"), |
| __n, _Nm), |
| _AT_Type::_S_ref(_M_elems, 0)); |
| } |
| |
| reference |
| front() noexcept |
| { return *begin(); } |
| |
| constexpr const_reference |
| front() const noexcept |
| { return _AT_Type::_S_ref(_M_elems, 0); } |
| |
| reference |
| back() noexcept |
| { return _Nm ? *(end() - 1) : *end(); } |
| |
| constexpr const_reference |
| back() const noexcept |
| { |
| return _Nm ? _AT_Type::_S_ref(_M_elems, _Nm - 1) |
| : _AT_Type::_S_ref(_M_elems, 0); |
| } |
| |
| pointer |
| data() noexcept |
| { return _AT_Type::_S_ptr(_M_elems); } |
| |
| const_pointer |
| data() const noexcept |
| { return _AT_Type::_S_ptr(_M_elems); } |
| }; |
| |
| // Array comparisons. |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) |
| { return std::equal(__one.begin(), __one.end(), __two.begin()); } |
| |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator!=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) |
| { return !(__one == __two); } |
| |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b) |
| { |
| return std::lexicographical_compare(__a.begin(), __a.end(), |
| __b.begin(), __b.end()); |
| } |
| |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) |
| { return __two < __one; } |
| |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator<=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) |
| { return !(__one > __two); } |
| |
| template<typename _Tp, std::size_t _Nm> |
| inline bool |
| operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two) |
| { return !(__one < __two); } |
| |
| // Specialized algorithms. |
| template<typename _Tp, std::size_t _Nm> |
| inline void |
| swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two) |
| noexcept(noexcept(__one.swap(__two))) |
| { __one.swap(__two); } |
| |
| template<std::size_t _Int, typename _Tp, std::size_t _Nm> |
| constexpr _Tp& |
| get(array<_Tp, _Nm>& __arr) noexcept |
| { |
| static_assert(_Int < _Nm, "index is out of bounds"); |
| return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>:: |
| _S_ref(__arr._M_elems, _Int); |
| } |
| |
| template<std::size_t _Int, typename _Tp, std::size_t _Nm> |
| constexpr _Tp&& |
| get(array<_Tp, _Nm>&& __arr) noexcept |
| { |
| static_assert(_Int < _Nm, "index is out of bounds"); |
| return std::move(_GLIBCXX_STD_C::get<_Int>(__arr)); |
| } |
| |
| template<std::size_t _Int, typename _Tp, std::size_t _Nm> |
| constexpr const _Tp& |
| get(const array<_Tp, _Nm>& __arr) noexcept |
| { |
| static_assert(_Int < _Nm, "index is out of bounds"); |
| return _GLIBCXX_STD_C::__array_traits<_Tp, _Nm>:: |
| _S_ref(__arr._M_elems, _Int); |
| } |
| |
| _GLIBCXX_END_NAMESPACE_CONTAINER |
| } // namespace std |
| |
| namespace std _GLIBCXX_VISIBILITY(default) |
| { |
| _GLIBCXX_BEGIN_NAMESPACE_VERSION |
| |
| // Tuple interface to class template array. |
| |
| /// tuple_size |
| template<typename _Tp> |
| class tuple_size; |
| |
| /// Partial specialization for std::array |
| template<typename _Tp, std::size_t _Nm> |
| struct tuple_size<_GLIBCXX_STD_C::array<_Tp, _Nm>> |
| : public integral_constant<std::size_t, _Nm> { }; |
| |
| /// tuple_element |
| template<std::size_t _Int, typename _Tp> |
| class tuple_element; |
| |
| /// Partial specialization for std::array |
| template<std::size_t _Int, typename _Tp, std::size_t _Nm> |
| struct tuple_element<_Int, _GLIBCXX_STD_C::array<_Tp, _Nm>> |
| { |
| static_assert(_Int < _Nm, "index is out of bounds"); |
| typedef _Tp type; |
| }; |
| |
| _GLIBCXX_END_NAMESPACE_VERSION |
| } // namespace std |
| |
| #ifdef _GLIBCXX_DEBUG |
| # include <debug/array> |
| #endif |
| |
| #ifdef _GLIBCXX_PROFILE |
| # include <profile/array> |
| #endif |
| |
| #endif // C++11 |
| |
| #endif // _GLIBCXX_ARRAY |