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