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// class template array -*- C++ -*-
// Copyright (C) 2004, 2005, 2006 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 2, 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.
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
/** @file tr1/array
* This is a TR1 C++ Library header.
*/
#ifndef _TR1_ARRAY
#define _TR1_ARRAY 1
#include <new>
#include <iterator>
#include <algorithm>
#include <cstddef>
#include <bits/functexcept.h>
#include <ext/type_traits.h>
//namespace std::tr1
namespace std
{
_GLIBCXX_BEGIN_NAMESPACE(tr1)
/// @brief struct array [6.2.2].
/// NB: Requires complete type _Tp.
template<typename _Tp, std::size_t _Nm>
struct array
{
typedef _Tp value_type;
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.
value_type _M_instance[_Nm ? _Nm : 1] __attribute__((__aligned__));
// No explicit construct/copy/destroy for aggregate type.
void
assign(const value_type& __u)
{ std::fill_n(begin(), size(), __u); }
void
swap(array& __other)
{ std::swap_ranges(begin(), end(), __other.begin()); }
// Iterators.
iterator
begin()
{ return iterator(&_M_instance[0]); }
const_iterator
begin() const
{ return const_iterator(&_M_instance[0]); }
iterator
end()
{ return iterator(&_M_instance[_Nm]); }
const_iterator
end() const
{ return const_iterator(&_M_instance[_Nm]); }
reverse_iterator
rbegin()
{ return reverse_iterator(end()); }
const_reverse_iterator
rbegin() const
{ return const_reverse_iterator(end()); }
reverse_iterator
rend()
{ return reverse_iterator(begin()); }
const_reverse_iterator
rend() const
{ return const_reverse_iterator(begin()); }
// Capacity.
size_type
size() const { return _Nm; }
size_type
max_size() const { return _Nm; }
bool
empty() const { return size() == 0; }
// Element access.
reference
operator[](size_type __n)
{ return _M_instance[__n]; }
const_reference
operator[](size_type __n) const
{ return _M_instance[__n]; }
reference
at(size_type __n)
{ return _M_at<_Nm>(__n); }
const_reference
at(size_type __n) const
{ return _M_at<_Nm>(__n); }
reference
front()
{ return *begin(); }
const_reference
front() const
{ return *begin(); }
reference
back()
{ return _Nm ? *(end() - 1) : *end(); }
const_reference
back() const
{ return _Nm ? *(end() - 1) : *end(); }
_Tp*
data()
{ return &_M_instance[0]; }
const _Tp*
data() const
{ return &_M_instance[0]; }
private:
template<std::size_t _Mm>
typename __gnu_cxx::__enable_if<_Mm, reference>::__type
_M_at(size_type __n)
{
if (__builtin_expect(__n >= _Mm, false))
std::__throw_out_of_range(__N("array::_M_at"));
return _M_instance[__n];
}
// Avoid "unsigned comparison with zero" warnings.
template<std::size_t _Mm>
typename __gnu_cxx::__enable_if<!_Mm, reference>::__type
_M_at(size_type)
{
std::__throw_out_of_range(__N("array::_M_at"));
return _M_instance[0];
}
template<std::size_t _Mm>
typename __gnu_cxx::__enable_if<_Mm, const_reference>::__type
_M_at(size_type __n) const
{
if (__builtin_expect(__n >= _Mm, false))
std::__throw_out_of_range(__N("array::_M_at"));
return _M_instance[__n];
}
template<std::size_t _Mm>
typename __gnu_cxx::__enable_if<!_Mm, const_reference>::__type
_M_at(size_type) const
{
std::__throw_out_of_range(__N("array::_M_at"));
return _M_instance[0];
}
};
// 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 [6.2.2.2].
template<typename _Tp, std::size_t _Nm>
inline void
swap(array<_Tp, _Nm>& __one, array<_Tp, _Nm>& __two)
{ std::swap_ranges(__one.begin(), __one.end(), __two.begin()); }
// Tuple interface to class template array [6.2.2.5].
template<typename _Tp> class tuple_size;
template<int _Int, typename _Tp> class tuple_element;
template<typename _Tp, std::size_t _Nm>
struct tuple_size<array<_Tp, _Nm> >
{ static const int value = _Nm; };
template<typename _Tp, std::size_t _Nm>
const int tuple_size<array<_Tp, _Nm> >::value;
template<int _Int, typename _Tp, std::size_t _Nm>
struct tuple_element<_Int, array<_Tp, _Nm> >
{ typedef _Tp type; };
template<int _Int, typename _Tp, std::size_t _Nm>
inline _Tp&
get(array<_Tp, _Nm>& __arr)
{ return __arr[_Int]; }
template<int _Int, typename _Tp, std::size_t _Nm>
inline const _Tp&
get(const array<_Tp, _Nm>& __arr)
{ return __arr[_Int]; }
_GLIBCXX_END_NAMESPACE
}
#endif
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