1// Tag type for yielding ranges rather than values in <generator> -*- C++ -*-
2
3// Copyright (C) 2023-2024 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#ifndef _GLIBCXX_BITS_ELEMENTS_OF
26#define _GLIBCXX_BITS_ELEMENTS_OF
27
28#pragma GCC system_header
29
30#include <bits/c++config.h>
31
32#include <bits/version.h>
33
34// C++ >= 23 && __glibcxx_coroutine
35#if defined(__glibcxx_ranges) && defined(__glibcxx_generator)
36#include <bits/ranges_base.h>
37#include <bits/memoryfwd.h>
38
39#if _GLIBCXX_HOSTED
40# include <bits/allocator.h> // likely desirable if hosted.
41#endif // HOSTED
42
43namespace std _GLIBCXX_VISIBILITY(default)
44{
45_GLIBCXX_BEGIN_NAMESPACE_VERSION
46namespace ranges
47{
48
49 /**
50 * @ingroup ranges
51 * @since C++23
52 * @{
53 */
54
55 template<range _Range, typename _Alloc = allocator<byte>>
56 struct elements_of
57 {
58 [[no_unique_address]] _Range range;
59 [[no_unique_address]] _Alloc allocator = _Alloc();
60 };
61
62 template<typename _Range, typename _Alloc = allocator<byte>>
63 elements_of(_Range&&, _Alloc = _Alloc())
64 -> elements_of<_Range&&, _Alloc>;
65
66 /// @}
67}
68_GLIBCXX_END_NAMESPACE_VERSION
69} // namespace std
70
71#endif // __glibcxx_generator && __glibcxx_ranges
72#endif // _GLIBCXX_BITS_ELEMENTS_OF
73