ceph/src/boost/boost/exception/detail/is_output_streamable.hpp

   1 //Copyright (c) 2006-2009 Emil Dotchevski and Reverge Studios, Inc.
   2
   3 //Distributed under the Boost Software License, Version 1.0. (See accompanying
   4 //file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   5
   6 #ifndef UUID_898984B4076411DD973EDFA055D89593
   7 #define UUID_898984B4076411DD973EDFA055D89593
   8
   9 #include <ostream>
  10
  11 #if (__GNUC__*100+__GNUC_MINOR__>301) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
  12 #pragma GCC system_header
  13 #endif
  14 #if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
  15 #pragma warning(push,1)
  16 #endif
  17
  18 namespace
  19 boost
  20     {
  21     namespace
  22     to_string_detail
  23         {
  24         struct
  25         partial_ordering_helper1
  26             {
  27             template <class CharT,class Traits>
  28             partial_ordering_helper1( std::basic_ostream<CharT,Traits> & );
  29             };
  30
  31         struct
  32         partial_ordering_helper2
  33             {
  34             template <class T>
  35             partial_ordering_helper2( T const & );
  36             };
  37
  38         char operator<<( partial_ordering_helper1, partial_ordering_helper2 );
  39
  40         template <class T,class CharT,class Traits>
  41         struct
  42         is_output_streamable_impl
  43             {
  44             static std::basic_ostream<CharT,Traits> & f();
  45             static T const & g();
  46             enum e { value=1!=(sizeof(f()<<g())) };
  47             };
  48         }
  49
  50     template <class T, class CharT=char, class Traits=std::char_traits<CharT> >
  51     struct
  52     is_output_streamable
  53         {
  54         enum e { value=to_string_detail::is_output_streamable_impl<T,CharT,Traits>::value };
  55         };
  56     }
  57
  58 #if defined(_MSC_VER) && !defined(BOOST_EXCEPTION_ENABLE_WARNINGS)
  59 #pragma warning(pop)
  60 #endif
  61 #endif