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96 lines
2.4 KiB
96 lines
2.4 KiB
// |
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// Copyright (c) 2009 Rutger ter Borg |
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// |
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// Distributed under the Boost Software License, Version 1.0. |
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// (See 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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// |
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#ifndef BOOST_NUMERIC_BINDINGS_DETAIL_GET_HPP |
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#define BOOST_NUMERIC_BINDINGS_DETAIL_GET_HPP |
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#include <boost/numeric/bindings/detail/adaptor.hpp> |
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#include <boost/preprocessor/repetition.hpp> |
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#include <boost/preprocessor/cat.hpp> |
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namespace boost { |
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namespace numeric { |
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namespace bindings { |
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namespace detail { |
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template< typename Key > |
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struct get_dispatch {}; |
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#define GENERATE_GET( z, which, unused ) \ |
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template<> \ |
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struct get_dispatch< tag::size_type<which> > { \ |
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template< typename T > \ |
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static std::ptrdiff_t invoke( const T& t ) { \ |
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return detail::adaptor_access<T>:: \ |
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BOOST_PP_CAT( size, which )( t ); \ |
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} \ |
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};\ |
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\ |
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template<> \ |
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struct get_dispatch< tag::stride_type<which> > { \ |
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template< typename T > \ |
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static std::ptrdiff_t invoke( const T& t ) { \ |
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return detail::adaptor_access<T>:: \ |
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BOOST_PP_CAT( stride, which )( t ); \ |
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} \ |
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};\ |
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\ |
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template<> \ |
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struct get_dispatch< tag::bandwidth_type<which> > { \ |
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template< typename T > \ |
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static std::ptrdiff_t invoke( const T& t ) { \ |
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return detail::adaptor_access<T>:: \ |
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BOOST_PP_CAT( bandwidth, which )( t ); \ |
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} \ |
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}; |
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BOOST_PP_REPEAT_FROM_TO(1,3,GENERATE_GET,~) |
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template< typename T, typename Key, typename Enable = void > |
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struct get_impl {}; |
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template< typename T, typename Key > |
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struct get_impl< T, Key, typename boost::enable_if< |
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is_same_at< T, Key, std::ptrdiff_t > >::type > { |
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typedef std::ptrdiff_t result_type; |
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static std::ptrdiff_t invoke( const T& t ) { |
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return get_dispatch<Key>::invoke( t ); |
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} |
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}; |
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template< typename T, typename Key > |
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struct get_impl< T, Key, typename boost::enable_if< |
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mpl::not_< is_same_at< T, Key, std::ptrdiff_t > > >::type > { |
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typedef typename property_at< T, Key >::type result_type; |
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static result_type invoke( const T& ) { |
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return result_type(); |
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} |
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}; |
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template< typename T, typename Key > |
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struct result_of_get { |
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typedef typename get_impl< T, Key >::result_type type; |
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}; |
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template< typename Key, typename T > |
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typename result_of_get< T, Key >::type get( const T& t ) { |
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return get_impl< T, Key >::invoke( t ); |
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} |
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} // namespace detail |
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} // namespace bindings |
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} // namespace numeric |
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} // namespace boost |
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#endif
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