mirror of
https://github.com/ecency/ecency-mobile.git
synced 2024-12-23 05:13:04 +03:00
99 lines
3.1 KiB
C++
99 lines
3.1 KiB
C++
|
|
// (C) Copyright Edward Diener 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_DATA_HPP)
|
|
#define BOOST_TTI_HAS_DATA_HPP
|
|
|
|
#include <boost/config.hpp>
|
|
#include <boost/preprocessor/cat.hpp>
|
|
#include <boost/type_traits/remove_const.hpp>
|
|
#include <boost/tti/gen/has_data_gen.hpp>
|
|
#include <boost/tti/detail/ddata.hpp>
|
|
|
|
/*
|
|
|
|
The succeeding comments in this file are in doxygen format.
|
|
|
|
*/
|
|
|
|
/** \file
|
|
*/
|
|
|
|
/// Expands to a metafunction which tests whether member data or static member with a particular name and type exists.
|
|
/**
|
|
|
|
trait = the name of the metafunction.
|
|
|
|
name = the name of the inner member to introspect.
|
|
|
|
generates a metafunction called "trait" where 'trait' is the macro parameter.
|
|
|
|
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 in which to look for our 'name'
|
|
|
|
BOOST_TTI_TP_TYPE = The type of the member data or static member.
|
|
|
|
returns = 'value' is true if the 'name' exists, with the correct data type,
|
|
otherwise 'value' is false.
|
|
|
|
*/
|
|
#define BOOST_TTI_TRAIT_HAS_DATA(trait,name) \
|
|
BOOST_TTI_DETAIL_TRAIT_HAS_DATA(trait,name) \
|
|
template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE> \
|
|
struct trait \
|
|
{ \
|
|
typedef typename \
|
|
BOOST_PP_CAT(trait,_detail_hd) \
|
|
< \
|
|
typename boost::remove_const<BOOST_TTI_TP_T>::type, \
|
|
BOOST_TTI_TP_TYPE \
|
|
>::type type; \
|
|
BOOST_STATIC_CONSTANT(bool,value=type::value); \
|
|
}; \
|
|
/**/
|
|
|
|
/// Expands to a metafunction which tests whether member data or static member data with a particular name and type exists.
|
|
/**
|
|
|
|
name = the name of the inner member.
|
|
|
|
generates a metafunction called "has_data_name" where 'name' is the macro parameter.
|
|
|
|
template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE>
|
|
struct has_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 in which to look for our 'name'
|
|
|
|
BOOST_TTI_TP_TYPE = The type of the member data or static member.
|
|
|
|
returns = 'value' is true if the 'name' exists, with the correct data type,
|
|
otherwise 'value' is false.
|
|
|
|
*/
|
|
#define BOOST_TTI_HAS_DATA(name) \
|
|
BOOST_TTI_TRAIT_HAS_DATA \
|
|
( \
|
|
BOOST_TTI_HAS_DATA_GEN(name), \
|
|
name \
|
|
) \
|
|
/**/
|
|
|
|
#endif // BOOST_TTI_HAS_DATA_HPP
|