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The C and C++ Include Header Files

/usr/include/c++/13/ext/vstring_fwd.h

$ cat -n /usr/include/c++/13/ext/vstring_fwd.h

     1	// <vstring.h> Forward declarations -*- C++ -*-
     2	
     3	// Copyright (C) 2005-2023 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 ext/vstring_fwd.h
    26	 *  This is an internal header file, included by other library headers.
    27	 *  Do not attempt to use it directly. @headername{ext/vstring.h}
    28	 */
    29	
    30	#ifndef _VSTRING_FWD_H
    31	#define _VSTRING_FWD_H 1
    32	
    33	#pragma GCC system_header
    34	
    35	#include <bits/requires_hosted.h> // GNU extensions are currently omitted
    36	
    37	#include <bits/c++config.h>
    38	#include <bits/char_traits.h>
    39	#include <bits/allocator.h>
    40	
    41	namespace __gnu_cxx _GLIBCXX_VISIBILITY(default)
    42	{
    43	_GLIBCXX_BEGIN_NAMESPACE_VERSION
    44	
    45	  template<typename _CharT, typename _Traits, typename _Alloc>
    46	    class __sso_string_base;
    47	
    48	  template<typename _CharT, typename _Traits, typename _Alloc>
    49	    class __rc_string_base;
    50	
    51	  template<typename _CharT, typename _Traits = std::char_traits<_CharT>,
    52	           typename _Alloc = std::allocator<_CharT>,
    53		   template
    54		   <typename, typename, typename> class _Base = __sso_string_base>
    55	    class __versa_string;
    56	
    57	  typedef __versa_string<char>                              __vstring;
    58	  typedef __vstring                                         __sso_string;
    59	  typedef 
    60	  __versa_string<char, std::char_traits<char>,
    61			 std::allocator<char>, __rc_string_base>    __rc_string;
    62	
    63	  typedef __versa_string<wchar_t>                           __wvstring;
    64	  typedef __wvstring                                        __wsso_string;
    65	  typedef
    66	  __versa_string<wchar_t, std::char_traits<wchar_t>,
    67			 std::allocator<wchar_t>, __rc_string_base> __wrc_string;
    68	
    69	#if __cplusplus >= 201103L
    70	  typedef __versa_string<char16_t>                          __u16vstring;
    71	  typedef __u16vstring                                      __u16sso_string;
    72	  typedef 
    73	  __versa_string<char16_t, std::char_traits<char16_t>,
    74			 std::allocator<char16_t>, __rc_string_base> __u16rc_string;
    75	
    76	  typedef __versa_string<char32_t>                          __u32vstring;
    77	  typedef __u32vstring                                      __u32sso_string;
    78	  typedef 
    79	  __versa_string<char32_t, std::char_traits<char32_t>,
    80			 std::allocator<char32_t>, __rc_string_base> __u32rc_string;
    81	#endif // C++11
    82	
    83	_GLIBCXX_END_NAMESPACE_VERSION
    84	} // namespace
    85	
    86	#endif /* _VSTRING_FWD_H */
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