47 lines
1.7 KiB
C++
47 lines
1.7 KiB
C++
// Copyright David Abrahams 2003.
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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#ifndef NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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# define NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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# include <boost/python/detail/prefix.hpp>
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# include <boost/preprocessor/iteration/local.hpp>
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# include <boost/preprocessor/facilities/intercept.hpp>
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# include <boost/preprocessor/repetition/enum_params.hpp>
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# include <boost/preprocessor/repetition/enum_binary_params.hpp>
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namespace boost { namespace python { namespace detail {
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// nullary_function_adaptor -- a class template which ignores its
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// arguments and calls a nullary function instead. Used for building
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// error-reporting functions, c.f. pure_virtual
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template <class NullaryFunction>
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struct nullary_function_adaptor
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{
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nullary_function_adaptor(NullaryFunction fn)
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: m_fn(fn)
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{}
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void operator()() const { m_fn(); }
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# define BOOST_PP_LOCAL_MACRO(i) \
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template <BOOST_PP_ENUM_PARAMS_Z(1, i, class A)> \
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void operator()( \
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BOOST_PP_ENUM_BINARY_PARAMS_Z(1, i, A, const& BOOST_PP_INTERCEPT) \
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) const \
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{ \
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m_fn(); \
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}
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# define BOOST_PP_LOCAL_LIMITS (1, BOOST_PYTHON_MAX_ARITY)
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# include BOOST_PP_LOCAL_ITERATE()
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private:
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NullaryFunction m_fn;
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};
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}}} // namespace boost::python::detail
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#endif // NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
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