ceph/src/boost/libs/python/include/boost/python/detail/convertible.hpp

   1 // Copyright David Abrahams 2002.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5 #ifndef CONVERTIBLE_DWA2002614_HPP
   6 # define CONVERTIBLE_DWA2002614_HPP
   7
   8 # if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 241
   9 #  include <boost/mpl/if.hpp>
  10 #  include <boost/type_traits/conversion_traits.hpp>
  11 # endif
  12
  13 // Supplies a runtime is_convertible check which can be used with tag
  14 // dispatching to work around the Metrowerks Pro7 limitation with boost::is_convertible
  15 namespace boost { namespace python { namespace detail {
  16
  17 typedef char* yes_convertible;
  18 typedef int* no_convertible;
  19
  20 template <class Target>
  21 struct convertible
  22 {
  23 # if !defined(__EDG_VERSION__) || __EDG_VERSION__ > 241 || __EDG_VERSION__ == 238
  24     static inline no_convertible check(...) { return 0; }
  25     static inline yes_convertible check(Target) { return 0; }
  26 # else
  27     template <class X>
  28     static inline typename mpl::if_c<
  29         is_convertible<X,Target>::value
  30         , yes_convertible
  31         , no_convertible
  32         >::type check(X const&) { return 0; }
  33 # endif
  34 };
  35
  36 }}} // namespace boost::python::detail
  37
  38 #endif // CONVERTIBLE_DWA2002614_HPP