| 1 | // HP/SGI iterator extensions -*- C++ -*-
|
|---|
| 2 |
|
|---|
| 3 | // Copyright (C) 2001-2021 Free Software Foundation, Inc.
|
|---|
| 4 | //
|
|---|
| 5 | // This file is part of the GNU ISO C++ Library. This library is free
|
|---|
| 6 | // software; you can redistribute it and/or modify it under the
|
|---|
| 7 | // terms of the GNU General Public License as published by the
|
|---|
| 8 | // Free Software Foundation; either version 3, or (at your option)
|
|---|
| 9 | // any later version.
|
|---|
| 10 |
|
|---|
| 11 | // This library is distributed in the hope that it will be useful,
|
|---|
| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|---|
| 14 | // GNU General Public License for more details.
|
|---|
| 15 |
|
|---|
| 16 | // Under Section 7 of GPL version 3, you are granted additional
|
|---|
| 17 | // permissions described in the GCC Runtime Library Exception, version
|
|---|
| 18 | // 3.1, as published by the Free Software Foundation.
|
|---|
| 19 |
|
|---|
| 20 | // You should have received a copy of the GNU General Public License and
|
|---|
| 21 | // a copy of the GCC Runtime Library Exception along with this program;
|
|---|
| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|---|
| 23 | // <http://www.gnu.org/licenses/>.
|
|---|
| 24 |
|
|---|
| 25 | /*
|
|---|
| 26 | *
|
|---|
| 27 | * Copyright (c) 1994
|
|---|
| 28 | * Hewlett-Packard Company
|
|---|
| 29 | *
|
|---|
| 30 | * Permission to use, copy, modify, distribute and sell this software
|
|---|
| 31 | * and its documentation for any purpose is hereby granted without fee,
|
|---|
| 32 | * provided that the above copyright notice appear in all copies and
|
|---|
| 33 | * that both that copyright notice and this permission notice appear
|
|---|
| 34 | * in supporting documentation. Hewlett-Packard Company makes no
|
|---|
| 35 | * representations about the suitability of this software for any
|
|---|
| 36 | * purpose. It is provided "as is" without express or implied warranty.
|
|---|
| 37 | *
|
|---|
| 38 | *
|
|---|
| 39 | * Copyright (c) 1996-1998
|
|---|
| 40 | * Silicon Graphics Computer Systems, Inc.
|
|---|
| 41 | *
|
|---|
| 42 | * Permission to use, copy, modify, distribute and sell this software
|
|---|
| 43 | * and its documentation for any purpose is hereby granted without fee,
|
|---|
| 44 | * provided that the above copyright notice appear in all copies and
|
|---|
| 45 | * that both that copyright notice and this permission notice appear
|
|---|
| 46 | * in supporting documentation. Silicon Graphics makes no
|
|---|
| 47 | * representations about the suitability of this software for any
|
|---|
| 48 | * purpose. It is provided "as is" without express or implied warranty.
|
|---|
| 49 | */
|
|---|
| 50 |
|
|---|
| 51 | /** @file ext/iterator
|
|---|
| 52 | * This file is a GNU extension to the Standard C++ Library (possibly
|
|---|
| 53 | * containing extensions from the HP/SGI STL subset).
|
|---|
| 54 | */
|
|---|
| 55 |
|
|---|
| 56 | #ifndef _EXT_ITERATOR
|
|---|
| 57 | #define _EXT_ITERATOR 1
|
|---|
| 58 |
|
|---|
| 59 | #pragma GCC system_header
|
|---|
| 60 |
|
|---|
| 61 | #include <bits/concept_check.h>
|
|---|
| 62 | #include <iterator>
|
|---|
| 63 |
|
|---|
| 64 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
|
|---|
| 65 | {
|
|---|
| 66 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
|
|---|
| 67 |
|
|---|
| 68 | // There are two signatures for distance. In addition to the one
|
|---|
| 69 | // taking two iterators and returning a result, there is another
|
|---|
| 70 | // taking two iterators and a reference-to-result variable, and
|
|---|
| 71 | // returning nothing. The latter seems to be an SGI extension.
|
|---|
| 72 | // -- pedwards
|
|---|
| 73 | template<typename _InputIterator, typename _Distance>
|
|---|
| 74 | inline void
|
|---|
| 75 | __distance(_InputIterator __first, _InputIterator __last,
|
|---|
| 76 | _Distance& __n, std::input_iterator_tag)
|
|---|
| 77 | {
|
|---|
| 78 | // concept requirements
|
|---|
| 79 | __glibcxx_function_requires(_InputIteratorConcept<_InputIterator>)
|
|---|
| 80 | while (__first != __last)
|
|---|
| 81 | {
|
|---|
| 82 | ++__first;
|
|---|
| 83 | ++__n;
|
|---|
| 84 | }
|
|---|
| 85 | }
|
|---|
| 86 |
|
|---|
| 87 | template<typename _RandomAccessIterator, typename _Distance>
|
|---|
| 88 | inline void
|
|---|
| 89 | __distance(_RandomAccessIterator __first, _RandomAccessIterator __last,
|
|---|
| 90 | _Distance& __n, std::random_access_iterator_tag)
|
|---|
| 91 | {
|
|---|
| 92 | // concept requirements
|
|---|
| 93 | __glibcxx_function_requires(_RandomAccessIteratorConcept<
|
|---|
| 94 | _RandomAccessIterator>)
|
|---|
| 95 | __n += __last - __first;
|
|---|
| 96 | }
|
|---|
| 97 |
|
|---|
| 98 | /**
|
|---|
| 99 | * This is an SGI extension.
|
|---|
| 100 | * @ingroup SGIextensions
|
|---|
| 101 | * @doctodo
|
|---|
| 102 | */
|
|---|
| 103 | template<typename _InputIterator, typename _Distance>
|
|---|
| 104 | inline void
|
|---|
| 105 | distance(_InputIterator __first, _InputIterator __last,
|
|---|
| 106 | _Distance& __n)
|
|---|
| 107 | {
|
|---|
| 108 | // concept requirements -- taken care of in __distance
|
|---|
| 109 | __distance(__first, __last, __n, std::__iterator_category(__first));
|
|---|
| 110 | }
|
|---|
| 111 |
|
|---|
| 112 | _GLIBCXX_END_NAMESPACE_VERSION
|
|---|
| 113 | } // namespace
|
|---|
| 114 |
|
|---|
| 115 | #endif
|
|---|
| 116 |
|
|---|
