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File://usr/include/boost/tti/has_static_member_data.hpp

//  (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
*/

/// A macro which expands to a metafunction which tests whether a static member data with a particular name and type exists.
/**

    BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA is a macro which expands to a metafunction.
    The metafunction tests whether static member data with a particular
    name and type exists. The macro takes the form of BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) where
    
    trait = the name of the metafunction <br/>
    name  = the name of the inner member.

    BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA generates a metafunction called "trait" where 'trait' is the macro parameter.
    
  @code
  
              template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE>
              struct trait
                {
                static const value = unspecified;
                typedef mpl::bool_<true-or-false> type;
                };

              The metafunction types and return:
    
                BOOST_TTI_TP_T    = the enclosing type.
                                    The enclosing type can be a class, struct, or union.
                                    If the type is a union, static member data can only
                                    be found if the C++11 unrestricted union is implemented
                                    by the compiler being used, since prior to C++11 a union
                                    could not have static data members.
                
                BOOST_TTI_TP_TYPE = the type of the static member data.
                       
                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.
                          
  @endcode
  
*/
#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); \
    }; \
/**/

/// A macro which expands to a metafunction which tests whether a static member data with a particular name and type exists.
/**

    BOOST_TTI_HAS_STATIC_MEMBER_DATA is a macro which expands to a metafunction.
    The metafunction tests whether static member data with a particular
    name and type exists. The macro takes the form of BOOST_TTI_HAS_STATIC_MEMBER_DATA(name) where
    
    name  = the name of the inner member.

    BOOST_TTI_HAS_STATIC_MEMBER_DATA generates a metafunction called "has_static_member_data_name" where 'name' is the macro parameter.
    
  @code
  
              template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE>
              struct has_static_member_data_'name'
                {
                static const value = unspecified;
                typedef mpl::bool_<true-or-false> type;
                };

              The metafunction types and return:
    
                BOOST_TTI_TP_T    = the enclosing type.
                                    The enclosing type can be a class, struct, or union.
                                    If the type is a union, static member data can only
                                    be found if the C++11 unrestricted union is implemented
                                    by the compiler being used, since prior to C++11 a union
                                    could not have static data members.
                
                BOOST_TTI_TP_TYPE = the type of the static member data.
                       
                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.
                          
  @endcode
  
*/
#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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