39 lines
1.2 KiB
C++
39 lines
1.2 KiB
C++
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// Copyright David Abrahams 2002.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef CONVERTIBLE_DWA2002614_HPP
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# define CONVERTIBLE_DWA2002614_HPP
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# if defined(__EDG_VERSION__) && __EDG_VERSION__ <= 241
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# include <boost/mpl/if.hpp>
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# include <boost/type_traits/conversion_traits.hpp>
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# endif
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// Supplies a runtime is_convertible check which can be used with tag
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// dispatching to work around the Metrowerks Pro7 limitation with boost::is_convertible
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namespace boost { namespace python { namespace detail {
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typedef char* yes_convertible;
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typedef int* no_convertible;
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template <class Target>
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struct convertible
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{
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# if !defined(__EDG_VERSION__) || __EDG_VERSION__ > 241 || __EDG_VERSION__ == 238
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static inline no_convertible check(...) { return 0; }
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static inline yes_convertible check(Target) { return 0; }
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# else
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template <class X>
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static inline typename mpl::if_c<
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is_convertible<X,Target>::value
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, yes_convertible
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, no_convertible
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>::type check(X const&) { return 0; }
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# endif
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};
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}}} // namespace boost::python::detail
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#endif // CONVERTIBLE_DWA2002614_HPP
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