Chris@16: 
Chris@16: //  (C) Copyright Edward Diener 2011,2012,2013
Chris@16: //  Use, modification and distribution are subject to the Boost Software License,
Chris@16: //  Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
Chris@16: //  http://www.boost.org/LICENSE_1_0.txt).
Chris@16: 
Chris@16: #if !defined(BOOST_TTI_DETAIL_TEMPLATE_HPP)
Chris@16: #define BOOST_TTI_DETAIL_TEMPLATE_HPP
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/mpl/has_xxx.hpp>
Chris@16: #include <boost/preprocessor/cat.hpp>
Chris@16: #include <boost/preprocessor/debug/assert.hpp>
Chris@16: #include <boost/preprocessor/facilities/is_empty.hpp>
Chris@16: 
Chris@16: #define BOOST_TTI_DETAIL_IS_HELPER_BOOST_PP_NIL
Chris@16: 
Chris@16: #define BOOST_TTI_DETAIL_IS_NIL(param) \
Chris@16:   BOOST_PP_IS_EMPTY \
Chris@16:     ( \
Chris@16:     BOOST_PP_CAT(BOOST_TTI_DETAIL_IS_HELPER_,param) \
Chris@16:     ) \
Chris@16: /**/
Chris@16: 
Chris@16: #define BOOST_TTI_DETAIL_TRAIT_ASSERT_NOT_NIL(trait,name,params) \
Chris@16:   BOOST_PP_ASSERT_MSG(0, "The parameter must be BOOST_PP_NIL") \
Chris@16: /**/
Chris@16: 
Chris@16: #define BOOST_TTI_DETAIL_TRAIT_CHECK_IS_NIL(trait,name,params) \
Chris@16:   BOOST_PP_IIF \
Chris@16:     ( \
Chris@16:     BOOST_TTI_DETAIL_IS_NIL(params), \
Chris@16:     BOOST_TTI_DETAIL_TRAIT_HAS_TEMPLATE, \
Chris@16:     BOOST_TTI_DETAIL_TRAIT_ASSERT_NOT_NIL \
Chris@16:     ) \
Chris@16:     (trait,name,params) \
Chris@16: /**/
Chris@16: 
Chris@16: #define BOOST_TTI_DETAIL_TRAIT_HAS_TEMPLATE(trait,name,params) \
Chris@16:   BOOST_MPL_HAS_XXX_TEMPLATE_NAMED_DEF(BOOST_PP_CAT(trait,_detail_mpl), name, false) \
Chris@16:   template<class BOOST_TTI_DETAIL_TP_T> \
Chris@16:   struct trait : \
Chris@16:     BOOST_PP_CAT(trait,_detail_mpl)<BOOST_TTI_DETAIL_TP_T> \
Chris@16:     { \
Chris@16:     }; \
Chris@16: /**/
Chris@16: 
Chris@16: #endif // !BOOST_TTI_DETAIL_TEMPLATE_HPP