mirror of git://gcc.gnu.org/git/gcc.git
117 lines
3.9 KiB
C++
117 lines
3.9 KiB
C++
// HP/SGI iterator extensions -*- C++ -*-
|
|
|
|
// Copyright (C) 2001-2018 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/>.
|
|
|
|
/*
|
|
*
|
|
* Copyright (c) 1994
|
|
* Hewlett-Packard Company
|
|
*
|
|
* Permission to use, copy, modify, distribute and sell this software
|
|
* and its documentation for any purpose is hereby granted without fee,
|
|
* provided that the above copyright notice appear in all copies and
|
|
* that both that copyright notice and this permission notice appear
|
|
* in supporting documentation. Hewlett-Packard Company makes no
|
|
* representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied warranty.
|
|
*
|
|
*
|
|
* Copyright (c) 1996-1998
|
|
* Silicon Graphics Computer Systems, Inc.
|
|
*
|
|
* Permission to use, copy, modify, distribute and sell this software
|
|
* and its documentation for any purpose is hereby granted without fee,
|
|
* provided that the above copyright notice appear in all copies and
|
|
* that both that copyright notice and this permission notice appear
|
|
* in supporting documentation. Silicon Graphics makes no
|
|
* representations about the suitability of this software for any
|
|
* purpose. It is provided "as is" without express or implied warranty.
|
|
*/
|
|
|
|
/** @file ext/iterator
|
|
* This file is a GNU extension to the Standard C++ Library (possibly
|
|
* containing extensions from the HP/SGI STL subset).
|
|
*/
|
|
|
|
#ifndef _EXT_ITERATOR
|
|
#define _EXT_ITERATOR 1
|
|
|
|
#pragma GCC system_header
|
|
|
|
#include <bits/concept_check.h>
|
|
#include <iterator>
|
|
|
|
namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
|
|
{
|
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|
|
|
// There are two signatures for distance. In addition to the one
|
|
// taking two iterators and returning a result, there is another
|
|
// taking two iterators and a reference-to-result variable, and
|
|
// returning nothing. The latter seems to be an SGI extension.
|
|
// -- pedwards
|
|
template<typename _InputIterator, typename _Distance>
|
|
inline void
|
|
__distance(_InputIterator __first, _InputIterator __last,
|
|
_Distance& __n, std::input_iterator_tag)
|
|
{
|
|
// concept requirements
|
|
__glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)
|
|
while (__first != __last)
|
|
{
|
|
++__first;
|
|
++__n;
|
|
}
|
|
}
|
|
|
|
template<typename _RandomAccessIterator, typename _Distance>
|
|
inline void
|
|
__distance(_RandomAccessIterator __first, _RandomAccessIterator __last,
|
|
_Distance& __n, std::random_access_iterator_tag)
|
|
{
|
|
// concept requirements
|
|
__glibcxx_function_requires(_RandomAccessIteratorConcept<
|
|
_RandomAccessIterator>)
|
|
__n += __last - __first;
|
|
}
|
|
|
|
/**
|
|
* This is an SGI extension.
|
|
* @ingroup SGIextensions
|
|
* @doctodo
|
|
*/
|
|
template<typename _InputIterator, typename _Distance>
|
|
inline void
|
|
distance(_InputIterator __first, _InputIterator __last,
|
|
_Distance& __n)
|
|
{
|
|
// concept requirements -- taken care of in __distance
|
|
__distance(__first, __last, __n, std::__iterator_category(__first));
|
|
}
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
|
|
#endif
|
|
|