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The C and C++ Include Header Files

/usr/include/c++/13/locale


$ cat -n /usr/include/c++/13/locale

     1	// Locale support -*- C++ -*-
     2	
     3	// Copyright (C) 1997-2023 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	//
    26	// ISO C++ 14882: 22.1  Locales
    27	//
    28	
    29	/** @file include/locale
    30	 *  This is a Standard C++ Library header.
    31	 */
    32	
    33	#ifndef _GLIBCXX_LOCALE
    34	#define _GLIBCXX_LOCALE	1
    35	
    36	#pragma GCC system_header
    37	
    38	#include <bits/requires_hosted.h> // locales
    39	
    40	#include <bits/localefwd.h>
    41	#include <bits/locale_classes.h>
    42	#include <bits/locale_facets.h>
    43	#include <bits/locale_facets_nonio.h>
    44	#if __cplusplus >= 201103L
    45	#  include <bits/locale_conv.h>
    46	#endif
    47	
    48	#endif /* _GLIBCXX_LOCALE */