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      1 // functional_hash.h header -*- C++ -*-
      2 
      3 // Copyright (C) 2007, 2009 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/functional_hash.h
     26  *  This is an internal header file, included by other library headers.
     27  *  You should not attempt to use it directly.
     28  */
     29 
     30 #ifndef _FUNCTIONAL_HASH_H
     31 #define _FUNCTIONAL_HASH_H 1
     32 
     33 #pragma GCC system_header
     34 
     35 #ifndef __GXX_EXPERIMENTAL_CXX0X__
     36 # include <c++0x_warning.h>
     37 #endif
     38 
     39 #if defined(_GLIBCXX_INCLUDE_AS_TR1)
     40 #  error C++0x header cannot be included from TR1 header
     41 #endif
     42 
     43 #if defined(_GLIBCXX_INCLUDE_AS_CXX0X)
     44 #  include <tr1_impl/functional_hash.h>
     45 #else
     46 #  define _GLIBCXX_INCLUDE_AS_CXX0X
     47 #  define _GLIBCXX_BEGIN_NAMESPACE_TR1
     48 #  define _GLIBCXX_END_NAMESPACE_TR1
     49 #  define _GLIBCXX_TR1
     50 #  include <tr1_impl/functional_hash.h>
     51 #  undef _GLIBCXX_TR1
     52 #  undef _GLIBCXX_END_NAMESPACE_TR1
     53 #  undef _GLIBCXX_BEGIN_NAMESPACE_TR1
     54 #  undef _GLIBCXX_INCLUDE_AS_CXX0X
     55 #endif
     56 
     57 
     58 namespace std
     59 {
     60   struct error_code;
     61 
     62   template<>
     63     size_t
     64     hash<error_code>::operator()(error_code) const;
     65 }
     66 
     67 #endif // _FUNCTIONAL_HASH_H
     68 
     69