[857] | 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 NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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| 6 | # define NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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| 7 |
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| 8 | # include <boost/python/detail/prefix.hpp>
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| 9 | # include <boost/preprocessor/iteration/local.hpp>
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| 10 | # include <boost/preprocessor/facilities/intercept.hpp>
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| 11 | # include <boost/preprocessor/repetition/enum_params.hpp>
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| 12 | # include <boost/preprocessor/repetition/enum_binary_params.hpp>
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| 13 |
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| 14 | namespace boost { namespace python { namespace detail {
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| 15 |
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| 16 | // nullary_function_adaptor -- a class template which ignores its
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| 17 | // arguments and calls a nullary function instead. Used for building
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| 18 | // error-reporting functions, c.f. pure_virtual
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| 19 | template <class NullaryFunction>
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| 20 | struct nullary_function_adaptor
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| 21 | {
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| 22 | nullary_function_adaptor(NullaryFunction fn)
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| 23 | : m_fn(fn)
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| 24 | {}
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| 25 |
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| 26 | void operator()() const { m_fn(); }
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| 27 |
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| 28 | # define BOOST_PP_LOCAL_MACRO(i) \
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| 29 | template <BOOST_PP_ENUM_PARAMS_Z(1, i, class A)> \
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| 30 | void operator()( \
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| 31 | BOOST_PP_ENUM_BINARY_PARAMS_Z(1, i, A, const& BOOST_PP_INTERCEPT) \
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| 32 | ) const \
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| 33 | { \
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| 34 | m_fn(); \
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| 35 | }
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| 36 |
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| 37 | # define BOOST_PP_LOCAL_LIMITS (1, BOOST_PYTHON_MAX_ARITY)
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| 38 | # include BOOST_PP_LOCAL_ITERATE()
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| 39 |
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| 40 | private:
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| 41 | NullaryFunction m_fn;
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| 42 | };
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| 43 |
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| 44 | }}} // namespace boost::python::detail
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| 45 |
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| 46 | #endif // NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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