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The C and C++ Include Header Files

/usr/include/c++/11/bits/stringfwd.h


$ cat -n /usr/include/c++/11/bits/stringfwd.h

     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
    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