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- // (C) Copyright Edward Diener 2011,2012,2013
- // Use, modification and distribution are subject to 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).
- #if !defined(BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP)
- #define BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
- #include <boost/config.hpp>
- #include <boost/preprocessor/cat.hpp>
- #include <boost/tti/gen/has_static_member_data_gen.hpp>
- #include <boost/tti/detail/dstatic_mem_data.hpp>
- /*
- The succeeding comments in this file are in doxygen format.
- */
- /** \file
- */
- /// Expands to a metafunction which tests whether a static member data with a particular name and type exists.
- /**
- trait = the name of the metafunction within the tti namespace.
-
- name = the name of the inner member.
- generates a metafunction called "trait" where 'trait' is the macro parameter.
-
- The metafunction types and return:
-
- BOOST_TTI_TP_T = the enclosing type.
-
- BOOST_TTI_TP_TYPE = the static member data type,
- in the form of a data type,
- in which to look for our 'name'.
-
- returns = 'value' is true if the 'name' exists,
- with the BOOST_TTI_TP_TYPE type,
- within the enclosing BOOST_TTI_TP_T type,
- otherwise 'value' is false.
-
- */
- #define BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
- BOOST_TTI_DETAIL_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
- template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE> \
- struct trait \
- { \
- typedef typename \
- BOOST_PP_CAT(trait,_detail_hsd)<BOOST_TTI_TP_T,BOOST_TTI_TP_TYPE>::type type; \
- BOOST_STATIC_CONSTANT(bool,value=type::value); \
- }; \
- /**/
- /// Expands to a metafunction which tests whether a static member data with a particular name and type exists.
- /**
- name = the name of the inner member.
- generates a metafunction called "has_static_member_data_name" where 'name' is the macro parameter.
-
- The metafunction types and return:
-
- BOOST_TTI_TP_T = the enclosing type.
-
- BOOST_TTI_TP_TYPE = the static member data type,
- in the form of a data type,
- in which to look for our 'name'.
-
- returns = 'value' is true if the 'name' exists,
- with the appropriate BOOST_TTI_TP_TYPE type,
- within the enclosing BOOST_TTI_TP_T type,
- otherwise 'value' is false.
-
- */
- #define BOOST_TTI_HAS_STATIC_MEMBER_DATA(name) \
- BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA \
- ( \
- BOOST_TTI_HAS_STATIC_MEMBER_DATA_GEN(name), \
- name \
- ) \
- /**/
- #endif // BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
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