ceph/src/boost/libs/format/include/boost/format/detail/msvc_disambiguater.hpp

   1 // ----------------------------------------------------------------------------
   2 // msvc_disambiguater.hpp : msvc workarounds. (for put_{head|last} overloads)
   3 //               the trick was described in boost's list  by Aleksey Gurtovoy
   4 // ----------------------------------------------------------------------------
   5
   6 //  Copyright Samuel Krempp 2003. Use, modification, and distribution are
   7 //  subject to the Boost Software License, Version 1.0. (See accompanying
   8 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9
  10 // see http://www.boost.org/libs/format for library home page
  11
  12 // ----------------------------------------------------------------------------
  13
  14 #ifndef BOOST_MSVC_DISAMBIGUATER_HPP
  15 #define BOOST_MSVC_DISAMBIGUATER_HPP
  16
  17 #if BOOST_WORKAROUND(__DECCXX_VER, BOOST_TESTED_AT(60590042))
  18
  19 #include <boost/format/group.hpp>
  20 #include <ostream>
  21
  22 namespace boost {
  23 namespace io {
  24 namespace detail {
  25
  26 template< class Ch, class Tr, class T >
  27 struct disambiguater
  28 {
  29    template< typename U >
  30    static void put_head(BOOST_IO_STD basic_ostream<Ch, Tr>& os, group1<U> const& x, long)
  31    {
  32        os << group_head(x.a1_);
  33    }
  34    static void put_head(BOOST_IO_STD basic_ostream<Ch, Tr>& os, T const& x, int)
  35    {
  36    }
  37    template< typename U >
  38    static void put_last(BOOST_IO_STD basic_ostream<Ch, Tr>& os, group1<U> const& x, long)
  39    {
  40        os << group_last(x.a1_);
  41    }
  42    static void put_last(BOOST_IO_STD basic_ostream<Ch, Tr>& os, T const& x, int)
  43    {
  44      os << x;
  45    }
  46 };
  47
  48 } // namespace detail
  49 } // namespace io
  50 } // namespace boost
  51
  52 #endif // -__DECCXX_VER
  53
  54 #endif // -BOOST_MSVC_DISAMBIGUATER_HPP