Chris@16: // Copyright David Abrahams 2003.
Chris@16: // Distributed under the Boost Software License, Version 1.0. (See
Chris@16: // accompanying file LICENSE_1_0.txt or copy at
Chris@16: // http://www.boost.org/LICENSE_1_0.txt)
Chris@16: #ifndef NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
Chris@16: # define NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP
Chris@16: 
Chris@16: # include <boost/python/detail/prefix.hpp>
Chris@16: # include <boost/preprocessor/iteration/local.hpp>
Chris@16: # include <boost/preprocessor/facilities/intercept.hpp>
Chris@16: # include <boost/preprocessor/repetition/enum_params.hpp>
Chris@16: # include <boost/preprocessor/repetition/enum_binary_params.hpp>
Chris@16: 
Chris@16: namespace boost { namespace python { namespace detail { 
Chris@16: 
Chris@16: // nullary_function_adaptor -- a class template which ignores its
Chris@16: // arguments and calls a nullary function instead.  Used for building
Chris@16: // error-reporting functions, c.f. pure_virtual
Chris@16: template <class NullaryFunction>
Chris@16: struct nullary_function_adaptor
Chris@16: {
Chris@16:     nullary_function_adaptor(NullaryFunction fn)
Chris@16:       : m_fn(fn)
Chris@16:     {}
Chris@16: 
Chris@16:     void operator()() const { m_fn(); }
Chris@16: 
Chris@16: # define BOOST_PP_LOCAL_MACRO(i)                                            \
Chris@16:     template <BOOST_PP_ENUM_PARAMS_Z(1, i, class A)>                        \
Chris@16:     void operator()(                                                        \
Chris@16:         BOOST_PP_ENUM_BINARY_PARAMS_Z(1, i, A, const& BOOST_PP_INTERCEPT)   \
Chris@16:     ) const                                                                 \
Chris@16:     {                                                                       \
Chris@16:         m_fn();                                                             \
Chris@16:     }
Chris@16: 
Chris@16: # define BOOST_PP_LOCAL_LIMITS (1, BOOST_PYTHON_MAX_ARITY)
Chris@16: # include BOOST_PP_LOCAL_ITERATE()
Chris@16:     
Chris@16:  private:
Chris@16:     NullaryFunction m_fn;
Chris@16: };
Chris@16: 
Chris@16: }}} // namespace boost::python::detail
Chris@16: 
Chris@16: #endif // NULLARY_FUNCTION_ADAPTOR_DWA2003824_HPP