252 lines
7.1 KiB
C++
252 lines
7.1 KiB
C++
// class template array -*- C++ -*-
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// Copyright (C) 2004, 2005, 2006 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 2, 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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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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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 _TR1_ARRAY
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#define _TR1_ARRAY 1
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#include <new>
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#include <iterator>
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#include <algorithm>
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#include <cstddef>
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#include <bits/functexcept.h>
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#include <ext/type_traits.h>
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//namespace std::tr1
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namespace std
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{
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_GLIBCXX_BEGIN_NAMESPACE(tr1)
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/// @brief struct array [6.2.2].
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/// NB: Requires complete type _Tp.
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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] __attribute__((__aligned__));
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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(&_M_instance[0]); }
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const_iterator
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begin() const
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{ return const_iterator(&_M_instance[0]); }
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iterator
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end()
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{ return iterator(&_M_instance[_Nm]); }
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const_iterator
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end() const
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{ return const_iterator(&_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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_M_check<_Nm>(__n);
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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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_M_check<_Nm>(__n);
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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 &_M_instance[0]; }
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const _Tp*
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data() const
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{ return &_M_instance[0]; }
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private:
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template<std::size_t _Mm>
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typename __gnu_cxx::__enable_if<_Mm, void>::__type
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_M_check(size_type __n) const
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{
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if (__builtin_expect(__n >= _Mm, false))
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std::__throw_out_of_range(__N("array::_M_check"));
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}
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// Avoid "unsigned comparison with zero" warnings.
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template<std::size_t _Mm>
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typename __gnu_cxx::__enable_if<!_Mm, void>::__type
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_M_check(size_type) const
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{ std::__throw_out_of_range(__N("array::_M_check")); }
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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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{ std::swap_ranges(__one.begin(), __one.end(), __two.begin()); }
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// Tuple interface to class template array [6.2.2.5].
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template<typename _Tp> class tuple_size;
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template<int _Int, typename _Tp> 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 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
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}
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#endif
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