| 1 | // Copyright David Abrahams 2003. |
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| 2 | // Distributed under the Boost Software License, Version 1.0. (See |
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| 3 | // accompanying file LICENSE_1_0.txt or copy at |
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| 4 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | #ifndef VALUE_IS_XXX_DWA2003224_HPP |
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| 6 | # define VALUE_IS_XXX_DWA2003224_HPP |
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| 7 | |
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| 8 | # include <boost/config.hpp> |
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| 9 | # include <boost/mpl/bool.hpp> |
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| 10 | # include <boost/preprocessor/enum_params.hpp> |
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| 11 | |
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| 12 | # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) |
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| 13 | # include <boost/type_traits/is_reference.hpp> |
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| 14 | # include <boost/type_traits/add_reference.hpp> |
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| 15 | |
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| 16 | # define BOOST_PYTHON_VALUE_IS_XXX_DEF(name, qualified_name, nargs) \ |
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| 17 | template <class X_> \ |
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| 18 | struct value_is_##name \ |
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| 19 | { \ |
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| 20 | typedef char yes; \ |
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| 21 | typedef char (&no)[2]; \ |
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| 22 | \ |
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| 23 | static typename add_reference<X_>::type dummy; \ |
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| 24 | \ |
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| 25 | template < BOOST_PP_ENUM_PARAMS_Z(1, nargs, class U) > \ |
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| 26 | static yes test( \ |
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| 27 | qualified_name< BOOST_PP_ENUM_PARAMS_Z(1, nargs, U) > const&, int \ |
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| 28 | ); \ |
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| 29 | \ |
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| 30 | template <class U> \ |
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| 31 | static no test(U&, ...); \ |
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| 32 | \ |
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| 33 | BOOST_STATIC_CONSTANT( \ |
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| 34 | bool, value \ |
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| 35 | = (sizeof(test(dummy, 0)) == sizeof(yes))); \ |
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| 36 | \ |
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| 37 | typedef mpl::bool_<value> type; \ |
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| 38 | }; |
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| 39 | |
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| 40 | # else |
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| 41 | |
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| 42 | # include <boost/type_traits/remove_reference.hpp> |
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| 43 | # include <boost/type_traits/remove_cv.hpp> |
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| 44 | # include <boost/python/detail/is_xxx.hpp> |
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| 45 | |
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| 46 | # define BOOST_PYTHON_VALUE_IS_XXX_DEF(name, qualified_name, nargs) \ |
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| 47 | template <class X_> \ |
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| 48 | struct value_is_##name \ |
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| 49 | { \ |
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| 50 | BOOST_PYTHON_IS_XXX_DEF(name,qualified_name,nargs) \ |
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| 51 | BOOST_STATIC_CONSTANT(bool, value = is_##name< \ |
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| 52 | typename remove_cv< \ |
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| 53 | typename remove_reference<X_>::type \ |
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| 54 | >::type \ |
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| 55 | >::value); \ |
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| 56 | typedef mpl::bool_<value> type; \ |
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| 57 | \ |
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| 58 | }; |
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| 59 | |
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| 60 | # endif |
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| 61 | |
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| 62 | #endif // VALUE_IS_XXX_DWA2003224_HPP |
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