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
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