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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_HAS_STATIC_MEMBER_DATA_HPP)
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#define BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
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#include <boost/config.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/tti/gen/has_static_member_data_gen.hpp>
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#include <boost/tti/detail/dstatic_mem_data.hpp>
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/// A macro which expands to a metafunction which tests whether a static member data with a particular name and type exists.
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/**
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BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA is a macro which expands to a metafunction.
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The metafunction tests whether static member data with a particular
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name and type exists. The macro takes the form of BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) where
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trait = the name of the metafunction <br/>
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name = the name of the inner member.
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BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA generates a metafunction called "trait" where 'trait' is the macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE>
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struct trait
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type.
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The enclosing type can be a class, struct, or union.
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If the type is a union, static member data can only
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be found if the C++11 unrestricted union is implemented
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by the compiler being used, since prior to C++11 a union
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could not have static data members.
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BOOST_TTI_TP_TYPE = the type of the static member data.
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returns = 'value' is true if the 'name' exists,
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with the BOOST_TTI_TP_TYPE type,
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within the enclosing BOOST_TTI_TP_T type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
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BOOST_TTI_DETAIL_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
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template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE> \
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struct trait \
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{ \
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typedef typename \
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BOOST_PP_CAT(trait,_detail_hsd)<BOOST_TTI_TP_T,BOOST_TTI_TP_TYPE>::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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/// A macro which expands to a metafunction which tests whether a static member data with a particular name and type exists.
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/**
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BOOST_TTI_HAS_STATIC_MEMBER_DATA is a macro which expands to a metafunction.
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The metafunction tests whether static member data with a particular
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name and type exists. The macro takes the form of BOOST_TTI_HAS_STATIC_MEMBER_DATA(name) where
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name = the name of the inner member.
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BOOST_TTI_HAS_STATIC_MEMBER_DATA generates a metafunction called "has_static_member_data_name" where 'name' is the macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE>
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struct has_static_member_data_'name'
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type.
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The enclosing type can be a class, struct, or union.
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If the type is a union, static member data can only
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be found if the C++11 unrestricted union is implemented
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by the compiler being used, since prior to C++11 a union
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could not have static data members.
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BOOST_TTI_TP_TYPE = the type of the static member data.
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returns = 'value' is true if the 'name' exists,
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with the appropriate BOOST_TTI_TP_TYPE type,
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within the enclosing BOOST_TTI_TP_T type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_HAS_STATIC_MEMBER_DATA(name) \
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BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA \
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( \
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BOOST_TTI_HAS_STATIC_MEMBER_DATA_GEN(name), \
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name \
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) \
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/**/
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#endif // BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
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