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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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