| 1 | // Copyright David Abrahams 2006. Distributed under the Boost |
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| 2 | // Software License, Version 1.0. (See accompanying |
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| 3 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 4 | #ifndef BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP |
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| 5 | # define BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP |
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| 6 | # include <boost/preprocessor/seq/for_each_i.hpp> |
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| 7 | # include <boost/preprocessor/seq/enum.hpp> |
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| 8 | # include <boost/preprocessor/comma_if.hpp> |
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| 9 | # include <boost/preprocessor/cat.hpp> |
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| 10 | #endif // BOOST_CONCEPT_DETAIL_CONCEPT_DEF_DWA200651_HPP |
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| 11 | |
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| 12 | // BOOST_concept(SomeName, (p1)(p2)...(pN)) |
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| 13 | // |
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| 14 | // Expands to "template <class p1, class p2, ...class pN> struct SomeName" |
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| 15 | // |
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| 16 | // Also defines an equivalent SomeNameConcept for backward compatibility. |
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| 17 | // Maybe in the next release we can kill off the "Concept" suffix for good. |
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| 18 | # define BOOST_concept(name, params) \ |
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| 19 | template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ |
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| 20 | struct name; /* forward declaration */ \ |
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| 21 | \ |
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| 22 | template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ |
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| 23 | struct BOOST_PP_CAT(name,Concept) \ |
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| 24 | : name< BOOST_PP_SEQ_ENUM(params) > \ |
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| 25 | { \ |
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| 26 | }; \ |
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| 27 | \ |
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| 28 | template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ |
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| 29 | struct name |
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| 30 | |
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| 31 | // Helper for BOOST_concept, above. |
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| 32 | # define BOOST_CONCEPT_typename(r, ignored, index, t) \ |
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| 33 | BOOST_PP_COMMA_IF(index) typename t |
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| 34 | |
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| 35 | |
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