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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_MEMBER_FUNCTION_HPP)
- #define BOOST_TTI_HAS_MEMBER_FUNCTION_HPP
- #include <boost/config.hpp>
- #include <boost/function_types/property_tags.hpp>
- #include <boost/mpl/vector.hpp>
- #include <boost/preprocessor/cat.hpp>
- #include <boost/tti/detail/ddeftype.hpp>
- #include <boost/tti/detail/dmem_fun.hpp>
- #include <boost/tti/gen/has_member_function_gen.hpp>
- #include <boost/tti/gen/namespace_gen.hpp>
- /*
- The succeeding comments in this file are in doxygen format.
- */
- /** \file
- */
- /// Expands to a metafunction which tests whether a member function with a particular name and signature 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.<br />
-
- template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG>
- 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'
- OR
- a pointer to member function as a single type.
-
- BOOST_TTI_TP_R = (optional) the return type of the member function
- if the first parameter is the enclosing type.
-
- BOOST_TTI_TP_FS = (optional) the parameters of the member function as a boost::mpl forward sequence
- if the first parameter is the enclosing type and the member function parameters
- are not empty.
-
- BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function
- if the first parameter is the enclosing type and a tag is needed.
-
- returns = 'value' is true if the 'name' exists,
- with the appropriate member function type,
- otherwise 'value' is false.
-
- */
- #define BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION(trait,name) \
- BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_FUNCTION(trait,name) \
- template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_R = BOOST_TTI_NAMESPACE::detail::deftype,class BOOST_TTI_TP_FS = boost::mpl::vector<>,class BOOST_TTI_TP_TAG = boost::function_types::null_tag> \
- struct trait \
- { \
- typedef typename \
- BOOST_PP_CAT(trait,_detail_hmf)<BOOST_TTI_TP_T,BOOST_TTI_TP_R,BOOST_TTI_TP_FS,BOOST_TTI_TP_TAG>::type type; \
- BOOST_STATIC_CONSTANT(bool,value=type::value); \
- }; \
- /**/
- /// Expands to a metafunction which tests whether a member function with a particular name and signature exists.
- /**
- name = the name of the inner member.
- generates a metafunction called "has_member_function_name" where 'name' is the macro parameter.
-
- template<class BOOST_TTI_TP_T,class BOOST_TTI_TP_R,class BOOST_TTI_TP_FS,class BOOST_TTI_TP_TAG>
- struct has_member_function_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'
- OR
- a pointer to member function as a single type.
-
- BOOST_TTI_TP_R = (optional) the return type of the member function
- if the first parameter is the enclosing type.
-
- BOOST_TTI_TP_FS = (optional) the parameters of the member function as a boost::mpl forward sequence
- if the first parameter is the enclosing type and the member function parameters
- are not empty.
-
- BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function
- if the first parameter is the enclosing type and a tag is needed.
-
- returns = 'value' is true if the 'name' exists,
- with the appropriate member function type,
- otherwise 'value' is false.
-
- */
- #define BOOST_TTI_HAS_MEMBER_FUNCTION(name) \
- BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION \
- ( \
- BOOST_TTI_HAS_MEMBER_FUNCTION_GEN(name), \
- name \
- ) \
- /**/
- #endif // BOOST_TTI_HAS_MEMBER_FUNCTION_HPP
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