252 lines
6.8 KiB
C++
252 lines
6.8 KiB
C++
// class template array -*- C++ -*-
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// Copyright (C) 2004-2016 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file tr1/array
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* This is a TR1 C++ Library header.
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*/
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#ifndef _GLIBCXX_TR1_ARRAY
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#define _GLIBCXX_TR1_ARRAY 1
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#pragma GCC system_header
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#include <bits/stl_algobase.h>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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namespace tr1
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @brief A standard container for storing a fixed size sequence of elements.
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*
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* @ingroup sequences
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*
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* Meets the requirements of a <a href="tables.html#65">container</a>, a
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* <a href="tables.html#66">reversible container</a>, and a
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* <a href="tables.html#67">sequence</a>.
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*
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* Sets support random access iterators.
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*
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* @param Tp Type of element. Required to be a complete type.
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* @param N Number of elements.
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*/
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template<typename _Tp, std::size_t _Nm>
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struct array
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{
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typedef _Tp value_type;
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typedef value_type& reference;
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typedef const value_type& const_reference;
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typedef value_type* iterator;
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typedef const value_type* const_iterator;
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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 std::reverse_iterator<iterator> reverse_iterator;
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typedef std::reverse_iterator<const_iterator> const_reverse_iterator;
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// Support for zero-sized arrays mandatory.
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value_type _M_instance[_Nm ? _Nm : 1];
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// No explicit construct/copy/destroy for aggregate type.
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void
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assign(const value_type& __u)
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{ std::fill_n(begin(), size(), __u); }
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void
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swap(array& __other)
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{ std::swap_ranges(begin(), end(), __other.begin()); }
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// Iterators.
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iterator
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begin()
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{ return iterator(std::__addressof(_M_instance[0])); }
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const_iterator
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begin() const
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{ return const_iterator(std::__addressof(_M_instance[0])); }
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iterator
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end()
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{ return iterator(std::__addressof(_M_instance[_Nm])); }
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const_iterator
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end() const
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{ return const_iterator(std::__addressof(_M_instance[_Nm])); }
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reverse_iterator
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rbegin()
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{ return reverse_iterator(end()); }
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const_reverse_iterator
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rbegin() const
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{ return const_reverse_iterator(end()); }
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reverse_iterator
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rend()
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{ return reverse_iterator(begin()); }
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const_reverse_iterator
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rend() const
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{ return const_reverse_iterator(begin()); }
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// Capacity.
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size_type
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size() const { return _Nm; }
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size_type
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max_size() const { return _Nm; }
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bool
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empty() const { return size() == 0; }
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// Element access.
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reference
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operator[](size_type __n)
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{ return _M_instance[__n]; }
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const_reference
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operator[](size_type __n) const
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{ return _M_instance[__n]; }
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reference
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at(size_type __n)
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{
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if (__n >= _Nm)
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std::__throw_out_of_range(__N("array::at"));
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return _M_instance[__n];
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}
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const_reference
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at(size_type __n) const
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{
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if (__n >= _Nm)
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std::__throw_out_of_range(__N("array::at"));
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return _M_instance[__n];
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}
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reference
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front()
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{ return *begin(); }
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const_reference
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front() const
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{ return *begin(); }
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reference
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back()
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{ return _Nm ? *(end() - 1) : *end(); }
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const_reference
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back() const
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{ return _Nm ? *(end() - 1) : *end(); }
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_Tp*
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data()
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{ return std::__addressof(_M_instance[0]); }
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const _Tp*
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data() const
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{ return std::__addressof(_M_instance[0]); }
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};
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// Array comparisons.
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator==(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
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{ return std::equal(__one.begin(), __one.end(), __two.begin()); }
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator!=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
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{ return !(__one == __two); }
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator<(const array<_Tp, _Nm>& __a, const array<_Tp, _Nm>& __b)
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{
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return std::lexicographical_compare(__a.begin(), __a.end(),
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__b.begin(), __b.end());
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}
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator>(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
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{ return __two < __one; }
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator<=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
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{ return !(__one > __two); }
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template<typename _Tp, std::size_t _Nm>
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inline bool
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operator>=(const array<_Tp, _Nm>& __one, const array<_Tp, _Nm>& __two)
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{ return !(__one < __two); }
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// Specialized algorithms [6.2.2.2].
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template<typename _Tp, std::size_t _Nm>
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inline void
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swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two)
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{ __one.swap(__two); }
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// Tuple interface to class template array [6.2.2.5].
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/// tuple_size
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template<typename _Tp>
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class tuple_size;
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/// tuple_element
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template<int _Int, typename _Tp>
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class tuple_element;
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template<typename _Tp, std::size_t _Nm>
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struct tuple_size<array<_Tp, _Nm> >
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{ static const int value = _Nm; };
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template<typename _Tp, std::size_t _Nm>
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const int
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tuple_size<array<_Tp, _Nm> >::value;
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template<int _Int, typename _Tp, std::size_t _Nm>
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struct tuple_element<_Int, array<_Tp, _Nm> >
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{ typedef _Tp type; };
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template<int _Int, typename _Tp, std::size_t _Nm>
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inline _Tp&
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get(array<_Tp, _Nm>& __arr)
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{ return __arr[_Int]; }
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template<int _Int, typename _Tp, std::size_t _Nm>
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inline const _Tp&
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get(const array<_Tp, _Nm>& __arr)
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{ return __arr[_Int]; }
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_GLIBCXX_END_NAMESPACE_VERSION
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}
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}
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#endif // _GLIBCXX_TR1_ARRAY
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