libstdc++-v3/include/bits/generic_shadow.h

   1 // generic C header shadow file -*- C++ -*-
   2
   3 // Copyright (C) 1997-1999, 2000 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // This file is included by all the standard C <foo.h> headers
  31 // after defining _SHADOW_NAME.
  32
  33 #ifdef _IN_C_LEGACY_  /* sub-included by a C header */
  34
  35       // Get out of the "swamp."
  36     } // Close extern "C"
  37   }   // Close namespace _C_legacy::
  38
  39 # undef _IN_C_LEGACY_
  40 # include _SHADOW_NAME
  41
  42   // Dive back into the "swamp."
  43   namespace _C_legacy {
  44     extern "C" {
  45 #     define _IN_C_LEGACY_
  46
  47 #else /* not _IN_C_LEGACY_:  directly included by user program */
  48
  49 # include _SHADOW_NAME
  50
  51   // Expose global C names, including non-standard ones, but shadow
  52   // some names and types with the std:: C++ version.
  53
  54   using namespace ::_C_legacy::_C_shadow;
  55
  56 #endif /* _IN_C_LEGACY_ */
  57
  58
  59