// Copyright David Abrahams 2006. Distributed under 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_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP# define BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP# include <boost/preprocessor/seq/for_each_i.hpp># include <boost/preprocessor/seq/enum.hpp># include <boost/preprocessor/comma_if.hpp># include <boost/preprocessor/cat.hpp>#endif // BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP// BOOST_concept(SomeName, (p1)(p2)...(pN))//// Expands to "template <class p1, class p2, ...class pN> struct SomeName"//// Also defines an equivalent SomeNameConcept for backward compatibility.// Maybe in the next release we can kill off the "Concept" suffix for good.# define BOOST_concept(name, params) \ template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ struct name; /* forward declaration */ \ \ template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ struct BOOST_PP_CAT(name,Concept) \ : name< BOOST_PP_SEQ_ENUM(params) > \ { \ }; \ \ template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ struct name // Helper for BOOST_concept, above.# define BOOST_CONCEPT_typename(r, ignored, index, t) \ BOOST_PP_COMMA_IF(index) typename t