ceph/src/boost/libs/mpl/include/boost/mpl/aux_/yes_no.hpp

   1
   2 #ifndef BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
   3 #define BOOST_MPL_AUX_YES_NO_HPP_INCLUDED
   4
   5 // Copyright Aleksey Gurtovoy 2000-2004
   6 //
   7 // Distributed under the Boost Software License, Version 1.0.
   8 // (See accompanying file LICENSE_1_0.txt or copy at
   9 // http://www.boost.org/LICENSE_1_0.txt)
  10 //
  11 // See http://www.boost.org/libs/mpl for documentation.
  12
  13 // $Id$
  14 // $Date$
  15 // $Revision$
  16
  17 #include <boost/mpl/aux_/nttp_decl.hpp>
  18 #include <boost/mpl/aux_/config/arrays.hpp>
  19 #include <boost/mpl/aux_/config/msvc.hpp>
  20 #include <boost/mpl/aux_/config/workaround.hpp>
  21
  22
  23 namespace boost { namespace mpl { namespace aux {
  24
  25 typedef char (&no_tag)[1];
  26 typedef char (&yes_tag)[2];
  27
  28 template< bool C_ > struct yes_no_tag
  29 {
  30     typedef no_tag type;
  31 };
  32
  33 template<> struct yes_no_tag<true>
  34 {
  35     typedef yes_tag type;
  36 };
  37
  38
  39 template< BOOST_MPL_AUX_NTTP_DECL(long, n) > struct weighted_tag
  40 {
  41 #if !BOOST_WORKAROUND(BOOST_MSVC, < 1300)
  42     typedef char (&type)[n];
  43 #else
  44     char buf[n];
  45     typedef weighted_tag type;
  46 #endif
  47 };
  48
  49 #if defined(BOOST_MPL_CFG_NO_DEPENDENT_ARRAY_TYPES)
  50 template<> struct weighted_tag<0>
  51 {
  52     typedef char (&type)[1];
  53 };
  54 #endif
  55
  56 }}}
  57
  58 #endif // BOOST_MPL_AUX_YES_NO_HPP_INCLUDED