1 // <string> Forward declarations -*- C++ -*-
2
3 // Copyright (C) 2001-2019 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
_GLIBCXX_VISIBILITY(default)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
79 typedef basic_string<char> string;
80
81 #ifdef _GLIBCXX_USE_WCHAR_T
82 /// A string of @c wchar_t
83 typedef basic_string<wchar_t> wstring;
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
93 typedef basic_string<char16_t> u16string;
94
95 /// A string of @c char32_t
96 typedef basic_string<char32_t> u32string;
97 #endif
98
99 /** @} */
100
101 _GLIBCXX_END_NAMESPACE_VERSION
102 } // namespace std
103
104 #endif // _STRINGFWD_H
105