libstdc++-v3/src/compatibility-c++0x.cc

   1 // Compatibility symbols for previous versions, C++0x bits -*- C++ -*-
   2
   3 // Copyright (C) 2009, 2010 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 #define _GLIBCXX_COMPATIBILITY_CXX0X
  26 #include <string>
  27 #include <system_error>
  28
  29 #ifndef __GXX_EXPERIMENTAL_CXX0X__
  30 # error "compatibility-c++0x.cc must be compiled with -std=gnu++0x"
  31 #endif
  32
  33 namespace std _GLIBCXX_VISIBILITY(default)
  34 {
  35   // gcc-4.4.0
  36   // <mutex> exported std::lock_error
  37 #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
  38   class lock_error : public exception
  39   {
  40   public:
  41     virtual const char*
  42     _GLIBCXX_CONST what() const throw();
  43   };
  44
  45   const char*
  46   lock_error::what() const throw()
  47   { return "std::lock_error"; }
  48 #endif
  49
  50   // We need these due to the symbols exported since GLIBCXX_3.4.10.
  51   // See libstdc++/41662 for details.
  52
  53 #ifndef _GLIBCXX_LONG_DOUBLE_COMPAT_IMPL
  54   template<>
  55     size_t
  56     hash<string>::operator()(string __s) const
  57     { return _Hash_impl::hash(__s.data(), __s.length()); }
  58
  59   template<>
  60     size_t
  61     hash<const string&>::operator()(const string& __s) const
  62     { return _Hash_impl::hash(__s.data(), __s.length()); }
  63
  64 #ifdef _GLIBCXX_USE_WCHAR_T
  65   template<>
  66     size_t
  67     hash<wstring>::operator()(wstring __s) const
  68     { return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
  69
  70   template<>
  71     size_t
  72     hash<const wstring&>::operator()(const wstring& __s) const
  73     { return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
  74 #endif
  75 #endif
  76
  77   template<>
  78     size_t
  79     hash<error_code>::operator()(error_code __e) const
  80     {
  81       const size_t __tmp = std::_Hash_impl::hash(__e._M_value);
  82       return std::_Hash_impl::__hash_combine(__e._M_cat, __tmp);
  83     }
  84 }