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1 | // Copyright David Abrahams 2003. |
2 | // Distributed under the Boost Software License, Version 1.0. (See | |
3 | // accompanying file LICENSE_1_0.txt or copy at | |
4 | // http://www.boost.org/LICENSE_1_0.txt) | |
5 | #ifndef NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP | |
6 | # define NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP | |
7 | ||
8 | # include <boost/python/detail/prefix.hpp> | |
9 | # include <boost/preprocessor/iteration/local.hpp> | |
10 | # include <boost/preprocessor/facilities/intercept.hpp> | |
11 | # include <boost/preprocessor/repetition/enum_params.hpp> | |
12 | # include <boost/preprocessor/repetition/enum_binary_params.hpp> | |
13 | ||
14 | namespace boost { namespace python { namespace detail { | |
15 | ||
16 | // nullary_function_adaptor -- a class template which ignores its | |
17 | // arguments and calls a nullary function instead. Used for building | |
18 | // error-reporting functions, c.f. pure_virtual | |
19 | template <class NullaryFunction> | |
20 | struct nullary_function_adaptor | |
21 | { | |
22 | nullary_function_adaptor(NullaryFunction fn) | |
23 | : m_fn(fn) | |
24 | {} | |
25 | ||
26 | void operator()() const { m_fn(); } | |
27 | ||
28 | # define BOOST_PP_LOCAL_MACRO(i) \ | |
29 | template <BOOST_PP_ENUM_PARAMS_Z(1, i, class A)> \ | |
30 | void operator()( \ | |
31 | BOOST_PP_ENUM_BINARY_PARAMS_Z(1, i, A, const& BOOST_PP_INTERCEPT) \ | |
32 | ) const \ | |
33 | { \ | |
34 | m_fn(); \ | |
35 | } | |
36 | ||
37 | # define BOOST_PP_LOCAL_LIMITS (1, BOOST_PYTHON_MAX_ARITY) | |
38 | # include BOOST_PP_LOCAL_ITERATE() | |
39 | ||
40 | private: | |
41 | NullaryFunction m_fn; | |
42 | }; | |
43 | ||
44 | }}} // namespace boost::python::detail | |
45 | ||
46 | #endif // NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP |