libstdc++
stringfwd.h
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1 // <string> Forward declarations -*- 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 /** @file bits/stringfwd.h
26  * This is an internal header file, included by other library headers.
27  * Do not attempt to use it directly. @headername{string}
28  */
29 
30 //
31 // ISO C++ 14882: 21 Strings library
32 //
33 
34 #ifndef _STRINGFWD_H
35 #define _STRINGFWD_H 1
36 
37 #pragma GCC system_header
38 
39 #include <bits/c++config.h>
40 #include <bits/memoryfwd.h>
41 
42 namespace std _GLIBCXX_VISIBILITY(default)
43 {
44 _GLIBCXX_BEGIN_NAMESPACE_VERSION
45 
46  /**
47  * @defgroup strings Strings
48  *
49  * @{
50  */
51 
52  template<class _CharT>
53  struct char_traits;
54 
55  template<> struct char_traits<char>;
56 
57 #ifdef _GLIBCXX_USE_WCHAR_T
58  template<> struct char_traits<wchar_t>;
59 #endif
60 
61 #ifdef _GLIBCXX_USE_CHAR8_T
62  template<> struct char_traits<char8_t>;
63 #endif
64 
65 #if __cplusplus >= 201103L
66  template<> struct char_traits<char16_t>;
67  template<> struct char_traits<char32_t>;
68 #endif
69 
70 _GLIBCXX_BEGIN_NAMESPACE_CXX11
71 
72  template<typename _CharT, typename _Traits = char_traits<_CharT>,
73  typename _Alloc = allocator<_CharT> >
74  class basic_string;
75 
76 _GLIBCXX_END_NAMESPACE_CXX11
77 
78  /// A string of @c char
80 
81 #ifdef _GLIBCXX_USE_WCHAR_T
82  /// A string of @c wchar_t
84 #endif
85 
86 #ifdef _GLIBCXX_USE_CHAR8_T
87  /// A string of @c char8_t
88  typedef basic_string<char8_t> u8string;
89 #endif
90 
91 #if __cplusplus >= 201103L
92  /// A string of @c char16_t
94 
95  /// A string of @c char32_t
97 #endif
98 
99  /** @} */
100 
101 _GLIBCXX_END_NAMESPACE_VERSION
102 } // namespace std
103 
104 #endif // _STRINGFWD_H
basic_string< char > string
A string of char.
Definition: stringfwd.h:74
basic_string< char32_t > u32string
A string of char32_t.
Definition: stringfwd.h:96
basic_string< char16_t > u16string
A string of char16_t.
Definition: stringfwd.h:93
basic_string< wchar_t > wstring
A string of wchar_t.
Definition: stringfwd.h:83
ISO C++ entities toplevel namespace is std.