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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