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/python/detail/type_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/std::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 checkboost::python::detail::convertible24 static inline no_convertible check(...) { return 0; } checkboost::python::detail::convertible25 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 39