// 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. | |
#if BOOST_WORKAROUND(__GNUC__, <= 3) | |
# 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) > \ | |
{ \ | |
/* at least 2.96 and 3.4.3 both need this */ \ | |
BOOST_PP_CAT(name,Concept)(); \ | |
}; \ | |
\ | |
template < BOOST_PP_SEQ_FOR_EACH_I(BOOST_CONCEPT_typename,~,params) > \ | |
struct name | |
#else | |
# 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 | |
#endif | |
// Helper for BOOST_concept, above. | |
# define BOOST_CONCEPT_typename(r, ignored, index, t) \ | |
BOOST_PP_COMMA_IF(index) typename t | |