| // 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 |
| |