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  1. // Compatibility symbols for previous versions, C++0x bits -*- C++ -*-
  2.  
  3. // Copyright (C) 2009-2013 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. #if __cplusplus < 201103L
  30. # error "compatibility-c++0x.cc must be compiled with -std=gnu++0x"
  31. #endif
  32.  
  33. #ifdef _GLIBCXX_SHARED
  34.  
  35. namespace std _GLIBCXX_VISIBILITY(default)
  36. {
  37.   // gcc-4.4.0
  38.   // <mutex> exported std::lock_error
  39. #if defined(_GLIBCXX_HAS_GTHREADS) && defined(_GLIBCXX_USE_C99_STDINT_TR1)
  40.   class lock_error : public exception
  41.   {
  42.   public:
  43.     virtual const char*
  44.     _GLIBCXX_CONST what() const throw();
  45.   };
  46.  
  47.   const char*
  48.   lock_error::what() const throw()
  49.   { return "std::lock_error"; }
  50. #endif
  51.  
  52.   // We need these due to the symbols exported since GLIBCXX_3.4.10.
  53.   // See libstdc++/41662 for details.
  54.  
  55. #ifndef _GLIBCXX_LONG_DOUBLE_COMPAT_IMPL
  56.   template<>
  57.     struct hash<string>
  58.     {
  59.       size_t operator()(string) const;
  60.     };
  61.  
  62.   size_t
  63.   hash<string>::operator()(string __s) const
  64.   { return _Hash_impl::hash(__s.data(), __s.length()); }
  65.  
  66.   template<>
  67.     struct hash<const string&>
  68.     {
  69.       size_t operator()(const string&) const;
  70.     };
  71.  
  72.   size_t
  73.   hash<const string&>::operator()(const string& __s) const
  74.   { return _Hash_impl::hash(__s.data(), __s.length()); }
  75.  
  76. #ifdef _GLIBCXX_USE_WCHAR_T
  77.   template<>
  78.     struct hash<wstring>
  79.     {
  80.       size_t operator()(wstring) const;
  81.     };
  82.  
  83.   size_t
  84.   hash<wstring>::operator()(wstring __s) const
  85.   { return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
  86.  
  87.   template<>
  88.     struct hash<const wstring&>
  89.     {
  90.       size_t operator()(const wstring&) const;
  91.     };
  92.  
  93.   size_t
  94.   hash<const wstring&>::operator()(const wstring& __s) const
  95.   { return _Hash_impl::hash(__s.data(), __s.length() * sizeof(wchar_t)); }
  96. #endif
  97. #endif
  98.  
  99.   template<>
  100.     struct hash<error_code>
  101.     {
  102.       size_t operator()(error_code) const;
  103.     };
  104.  
  105.   size_t
  106.   hash<error_code>::operator()(error_code __e) const
  107.   {
  108.     const size_t __tmp = std::_Hash_impl::hash(__e._M_value);
  109.     return std::_Hash_impl::__hash_combine(__e._M_cat, __tmp);
  110.   }
  111.  
  112.   // gcc-4.7.0
  113.   // <chrono> changes is_monotonic to is_steady.
  114.   namespace chrono
  115.   {
  116.     struct system_clock
  117.     {
  118.       static constexpr bool is_monotonic = false;
  119.     };
  120.     constexpr bool system_clock::is_monotonic;
  121.   } // namespace chrono
  122. }
  123.  
  124. #endif
  125.