// 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



