ctype_base.h

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// Locale support -*- C++ -*-
 
// Copyright (C) 1997-2023 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 3, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
 
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
// <http://www.gnu.org/licenses/>.
 
/** @file bits/ctype_base.h
 *  This is an internal header file, included by other library headers.
 *  Do not attempt to use it directly. @headername{locale}
 */
 
//
// ISO C++ 14882: 22.1  Locales
//
 
// Information as gleaned from /usr/include/ctype.h
 
namespace std _GLIBCXX_VISIBILITY(default)
{
_GLIBCXX_BEGIN_NAMESPACE_VERSION
 
  /// @brief  Base class for ctype.
  struct ctype_base
  {
    // Non-standard typedefs.
    typedef const int*          __to_type;
 
    // NB: Offsets into ctype<char>::_M_table force a particular size
    // on the mask type. Because of this, we don't use an enum.
    typedef unsigned short      mask;
    static const mask upper     = _ISupper;
    static const mask lower     = _ISlower;
    static const mask alpha     = _ISalpha;
    static const mask digit     = _ISdigit;
    static const mask xdigit    = _ISxdigit;
    static const mask space     = _ISspace;
    static const mask print     = _ISprint;
    static const mask graph     = _ISalpha | _ISdigit | _ISpunct;
    static const mask cntrl     = _IScntrl;
    static const mask punct     = _ISpunct;
    static const mask alnum     = _ISalpha | _ISdigit;
#if __cplusplus >= 201103L
    static const mask blank     = _ISblank;
#endif
  };
 
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace