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- // Boost.Geometry (aka GGL, Generic Geometry Library)
- // Copyright (c) 2007-2012 Barend Gehrels, Amsterdam, the Netherlands.
- // Copyright (c) 2008-2012 Bruno Lalande, Paris, France.
- // Copyright (c) 2009-2012 Mateusz Loskot, London, UK.
- // Parts of Boost.Geometry are redesigned from Geodan's Geographic Library
- // (geolib/GGL), copyright (c) 1995-2010 Geodan, Amsterdam, the Netherlands.
- // Use, modification and distribution is subject to the Boost Software License,
- // Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
- // http://www.boost.org/LICENSE_1_0.txt)
- #ifndef BOOST_GEOMETRY_UTIL_PARAMETER_TYPE_OF_HPP
- #define BOOST_GEOMETRY_UTIL_PARAMETER_TYPE_OF_HPP
- #include <boost/function_types/function_arity.hpp>
- #include <boost/function_types/is_member_function_pointer.hpp>
- #include <boost/function_types/parameter_types.hpp>
- #include <boost/mpl/at.hpp>
- #include <boost/mpl/int.hpp>
- #include <boost/mpl/plus.hpp>
- #include <boost/type_traits/remove_reference.hpp>
- namespace boost { namespace geometry
- {
- /*!
- \brief Meta-function selecting a parameter type of a (member) function, by index
- \ingroup utility
- */
- template <typename Method, std::size_t Index>
- struct parameter_type_of
- {
- typedef typename boost::function_types::parameter_types
- <
- Method
- >::type parameter_types;
- typedef typename boost::mpl::if_
- <
- boost::function_types::is_member_function_pointer<Method>,
- boost::mpl::int_<1>,
- boost::mpl::int_<0>
- >::type base_index_type;
- typedef typename boost::mpl::if_c
- <
- Index == 0,
- base_index_type,
- typename boost::mpl::plus
- <
- base_index_type,
- boost::mpl::int_<Index>
- >::type
- >::type indexed_type;
- typedef typename boost::remove_reference
- <
- typename boost::mpl::at
- <
- parameter_types,
- indexed_type
- >::type
- >::type type;
- };
- }} // namespace boost::geometry
- #endif // BOOST_GEOMETRY_UTIL_PARAMETER_TYPE_OF_HPP
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