1
2// (C) Copyright Edward Diener 2011,2012,2013
3// Use, modification and distribution are subject to the Boost Software License,
4// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
5// http://www.boost.org/LICENSE_1_0.txt).
6
7#if !defined(BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP)
8#define BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
9
10#include <boost/config.hpp>
11#include <boost/preprocessor/cat.hpp>
12#include <boost/tti/gen/has_static_member_data_gen.hpp>
13#include <boost/tti/detail/dstatic_mem_data.hpp>
14
15/*
16
17 The succeeding comments in this file are in doxygen format.
18
19*/
20
21/** \file
22*/
23
24/// Expands to a metafunction which tests whether a static member data with a particular name and type exists.
25/**
26
27 trait = the name of the metafunction within the tti namespace.
28
29 name = the name of the inner member.
30
31 generates a metafunction called "trait" where 'trait' is the macro parameter.
32
33 The metafunction types and return:
34
35 BOOST_TTI_TP_T = the enclosing type.
36
37 BOOST_TTI_TP_TYPE = the static member data type,
38 in the form of a data type,
39 in which to look for our 'name'.
40
41 returns = 'value' is true if the 'name' exists,
42 with the BOOST_TTI_TP_TYPE type,
43 within the enclosing BOOST_TTI_TP_T type,
44 otherwise 'value' is false.
45
46*/
47#define BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
48 BOOST_TTI_DETAIL_TRAIT_HAS_STATIC_MEMBER_DATA(trait,name) \
49 template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_TYPE> \
50 struct trait \
51 { \
52 typedef typename \
53 BOOST_PP_CAT(trait,_detail_hsd)<BOOST_TTI_TP_T,BOOST_TTI_TP_TYPE>::type type; \
54 BOOST_STATIC_CONSTANT(bool,value=type::value); \
55 }; \
56/**/
57
58/// Expands to a metafunction which tests whether a static member data with a particular name and type exists.
59/**
60
61 name = the name of the inner member.
62
63 generates a metafunction called "has_static_member_data_name" where 'name' is the macro parameter.
64
65 The metafunction types and return:
66
67 BOOST_TTI_TP_T = the enclosing type.
68
69 BOOST_TTI_TP_TYPE = the static member data type,
70 in the form of a data type,
71 in which to look for our 'name'.
72
73 returns = 'value' is true if the 'name' exists,
74 with the appropriate BOOST_TTI_TP_TYPE type,
75 within the enclosing BOOST_TTI_TP_T type,
76 otherwise 'value' is false.
77
78*/
79#define BOOST_TTI_HAS_STATIC_MEMBER_DATA(name) \
80 BOOST_TTI_TRAIT_HAS_STATIC_MEMBER_DATA \
81 ( \
82 BOOST_TTI_HAS_STATIC_MEMBER_DATA_GEN(name), \
83 name \
84 ) \
85/**/
86
87#endif // BOOST_TTI_HAS_STATIC_MEMBER_DATA_HPP
88

source code of boost/boost/tti/has_static_member_data.hpp