libstdc++: iosfwd_span.h Source File

libstdc++

iosfwd_span.h
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1// <iosfwd> Forward declarations for <spanstream> -*- C++ -*-
2
3// Copyright (C) 2022-2026 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/** @file include/bits/iosfwd_span.h
26 * This is an internal header file, included by other library headers.
27 * Do not attempt to use it directly. @headername{iosfwd}
28 */
29
30#ifndef _GLIBCXX_IOSFWD_SPAN_H
31#define _GLIBCXX_IOSFWD_SPAN_H 1
32
33#ifdef _GLIBCXX_SYSHDR
34#pragma GCC system_header
35#endif
36
37#include <bits/requires_hosted.h> // iostreams
38
39#include <bits/version.h>
40
41#ifdef __glibcxx_spanstream // >= C++23
42#include <bits/iosfwd.h>
43
44namespace std _GLIBCXX_VISIBILITY(default)
45{
46_GLIBCXX_BEGIN_NAMESPACE_VERSION
47
48 /**
49 * @addtogroup io
50 * @{
51 */
52
53 template<typename _CharT, typename _Traits = char_traits<_CharT>>
54 class basic_spanbuf;
55 template<typename _CharT, typename _Traits = char_traits<_CharT>>
56 class basic_ispanstream;
57 template<typename _CharT, typename _Traits = char_traits<_CharT>>
58 class basic_ospanstream;
59 template<typename _CharT, typename _Traits = char_traits<_CharT>>
60 class basic_spanstream;
61
62 using spanbuf = basic_spanbuf<char>;
63 using ispanstream = basic_ispanstream<char>;
64 using ospanstream = basic_ospanstream<char>;
65 using spanstream = basic_spanstream<char>;
66
67#ifdef _GLIBCXX_USE_WCHAR_T
68 using wspanbuf = basic_spanbuf<wchar_t>;
69 using wispanstream = basic_ispanstream<wchar_t>;
70 using wospanstream = basic_ospanstream<wchar_t>;
71 using wspanstream = basic_spanstream<wchar_t>;
72#endif
73 /// @}
74
75_GLIBCXX_END_NAMESPACE_VERSION
76} // namespace
77#endif // C++23
78#endif /* _GLIBCXX_IOSFWD_SPAN_H */
version.h
requires_hosted.h
std
ISO C++ entities toplevel namespace is std.