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_HAS_MEMBER_DATA_HPP)
Chris@16: #define BOOST_TTI_HAS_MEMBER_DATA_HPP
Chris@16: 
Chris@101: #include <boost/config.hpp>
Chris@16: #include <boost/preprocessor/cat.hpp>
Chris@16: #include <boost/tti/detail/ddeftype.hpp>
Chris@16: #include <boost/tti/detail/dmem_data.hpp>
Chris@16: #include <boost/tti/gen/has_member_data_gen.hpp>
Chris@16: 
Chris@16: /*
Chris@16: 
Chris@16:   The succeeding comments in this file are in doxygen format.
Chris@16: 
Chris@16: */
Chris@16: 
Chris@16: /** \file
Chris@16: */
Chris@16: 
Chris@16: /// Expands to a metafunction which tests whether a member data with a particular name and type exists.
Chris@16: /**
Chris@16: 
Chris@16:     trait = the name of the metafunction.
Chris@16:     
Chris@16:     name  = the name of the inner member to introspect.
Chris@16: 
Chris@16:     generates a metafunction called "trait" where 'trait' is the macro parameter.
Chris@16:     
Chris@16:               template<class BOOST_TTI_TP_ET,class BOOST_TTI_TP_TYPE>
Chris@16:               struct trait
Chris@16:                 {
Chris@16:                 static const value = unspecified;
Chris@16:                 typedef mpl::bool_<true-or-false> type;
Chris@16:                 };
Chris@16: 
Chris@16:               The metafunction types and return:
Chris@16:     
Chris@16:                 BOOST_TTI_TP_ET   = the enclosing type in which to look for our 'name'
Chris@16:                                                          OR
Chris@16:                                     The type of the member data in the form of a pointer
Chris@16:                                     to member data.
Chris@16:                 
Chris@16:                 BOOST_TTI_TP_TYPE = (optional) The type of the member data if the first
Chris@16:                                     parameter is the enclosing type.
Chris@16:                 
Chris@16:                 returns  = 'value' is true if the 'name' exists, with the correct data type,
Chris@16:                            otherwise 'value' is false.
Chris@16:                           
Chris@16: */
Chris@16: #define BOOST_TTI_TRAIT_HAS_MEMBER_DATA(trait,name) \
Chris@16:   BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_DATA(trait,name) \
Chris@16:   template<class BOOST_TTI_TP_ET,class BOOST_TTI_TP_TYPE = BOOST_TTI_NAMESPACE::detail::deftype> \
Chris@101:   struct trait \
Chris@101:     { \
Chris@101:     typedef typename \
Chris@16:     BOOST_PP_CAT(trait,_detail_hmd) \
Chris@101:       	< \
Chris@101:       	BOOST_TTI_TP_ET, \
Chris@101:       	BOOST_TTI_TP_TYPE \
Chris@101:       	>::type type; \
Chris@101:     BOOST_STATIC_CONSTANT(bool,value=type::value); \
Chris@16:     }; \
Chris@16: /**/
Chris@16: 
Chris@16: /// Expands to a metafunction which tests whether a member data with a particular name and type exists.
Chris@16: /**
Chris@16: 
Chris@16:     name  = the name of the inner member.
Chris@16: 
Chris@16:     generates a metafunction called "has_member_data_name" where 'name' is the macro parameter.
Chris@16:     
Chris@16:               template<class BOOST_TTI_TP_ET,class BOOST_TTI_TP_TYPE>
Chris@16:               struct has_member_data_name
Chris@16:                 {
Chris@16:                 static const value = unspecified;
Chris@16:                 typedef mpl::bool_<true-or-false> type;
Chris@16:                 };
Chris@16: 
Chris@16:               The metafunction types and return:
Chris@16:     
Chris@16:                 BOOST_TTI_TP_ET   = the enclosing type in which to look for our 'name'
Chris@16:                                                          OR
Chris@16:                                     The type of the member data in the form of a pointer
Chris@16:                                     to member data.
Chris@16:                 
Chris@16:                 BOOST_TTI_TP_TYPE = (optional) The type of the member data if the first
Chris@16:                                     parameter is the enclosing type.
Chris@16:                 
Chris@16:                 returns  = 'value' is true if the 'name' exists, with the correct data type,
Chris@16:                            otherwise 'value' is false.
Chris@16:                           
Chris@16: */
Chris@16: #define BOOST_TTI_HAS_MEMBER_DATA(name) \
Chris@16:   BOOST_TTI_TRAIT_HAS_MEMBER_DATA \
Chris@16:   ( \
Chris@16:   BOOST_TTI_HAS_MEMBER_DATA_GEN(name), \
Chris@16:   name \
Chris@16:   ) \
Chris@16: /**/
Chris@16: 
Chris@16: #endif // BOOST_TTI_HAS_MEMBER_DATA_HPP