| |
| // (C) Copyright Edward Diener 2019 |
| // 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_MEMBER_FUNCTION_TEMPLATE_HPP) |
| #define BOOST_TTI_MEMBER_FUNCTION_TEMPLATE_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_template.hpp> |
| #include <boost/tti/gen/has_member_function_template_gen.hpp> |
| #include <boost/tti/gen/namespace_gen.hpp> |
| |
| #if BOOST_PP_VARIADICS |
| |
| #include <boost/tti/detail/dmacro_fun_template.hpp> |
| |
| /* |
| |
| The succeeding comments in this file are in doxygen format. |
| |
| */ |
| |
| /** \file |
| */ |
| |
| /// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists. |
| /** |
| |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction. |
| The metafunction tests whether an inner member function template with a particular name exists. |
| The macro takes the form of BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,...) where |
| |
| trait = the name of the metafunction <br/> |
| name = inner member function template name <br/> |
| ... = variadic parameters. |
| |
| The variadic parameter(s) are either: |
| |
| A sequence of valid instantiations for the member function template parameters |
| ie. 'int,long,double' etc. |
| |
| or |
| |
| A single variadic parameter which is a Boost PP array whose elements are |
| a sequence of valid instantiations for the member function template parameters |
| ie. '(3,(int,long,double))' etc. This form is allowed in order to be compatible |
| with using the non-variadic form of this macro. |
| |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "trait" where 'trait' is the first macro parameter. |
| |
| @code |
| |
| 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'. |
| The enclosing type can be a class, struct, or union. |
| OR |
| a pointer to member function as a single type |
| which encapsulates a single instantiation of |
| the member function template. |
| |
| BOOST_TTI_TP_R = (optional) the return type of the member function template |
| in a single instantiation of the member function template |
| if the first parameter is the enclosing type. |
| |
| BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence |
| if the first parameter is the enclosing type and the member function template parameters |
| are not empty. These parameters are a single instantiation of the member function template. |
| |
| BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template |
| 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 template type, |
| otherwise 'value' is false. |
| |
| @endcode |
| |
| */ |
| #define BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,...) \ |
| BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \ |
| ( \ |
| trait, \ |
| name, \ |
| BOOST_TTI_DETAIL_FUN_TEMPLATE_VARIADIC_TO_ARRAY(__VA_ARGS__) \ |
| ) \ |
| 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_hmft)<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); \ |
| }; \ |
| /**/ |
| |
| /// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists. |
| /** |
| |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction. |
| The metafunction tests whether an inner member function template with a particular name exists. |
| The macro takes the form of BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,...) where |
| |
| name = inner member function template name <br/> |
| ... = variadic parameters. |
| |
| The variadic parameter(s) are either: |
| |
| A sequence of valid instantiations for the member function template parameters |
| ie. 'int,long,double' etc. |
| |
| or |
| |
| A single variadic parameter which is a Boost PP array whose elements are |
| a sequence of valid instantiations for the member function template parameters |
| ie. '(3,(int,long,double))' etc. This form is allowed in order to be compatible |
| with using the non-variadic form of this macro. |
| |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "has_member_function_template_'name'" where 'name' is the first macro parameter. |
| |
| @code |
| |
| template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG> |
| struct has_member_function_template_'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'. |
| The enclosing type can be a class, struct, or union. |
| OR |
| a pointer to member function as a single type |
| which encapsulates a single instantiation of |
| the member function template. |
| |
| BOOST_TTI_TP_R = (optional) the return type of the member function template |
| in a single instantiation of the member function template |
| if the first parameter is the enclosing type. |
| |
| BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence |
| if the first parameter is the enclosing type and the member function template parameters |
| are not empty. These parameters are a single instantiation of the member function template. |
| |
| BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template |
| 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 template type, |
| otherwise 'value' is false. |
| |
| @endcode |
| |
| */ |
| #define BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,...) \ |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \ |
| ( \ |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE_GEN(name), \ |
| name, \ |
| __VA_ARGS__ \ |
| ) \ |
| /**/ |
| |
| #else // !BOOST_PP_VARIADICS |
| |
| /* |
| |
| The succeeding comments in this file are in doxygen format. |
| |
| */ |
| |
| /** \file |
| */ |
| |
| /// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists. |
| /** |
| |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction. |
| The metafunction tests whether an inner member function template with a particular name exists. |
| The macro takes the form of BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) where |
| |
| trait = the name of the metafunction <br/> |
| name = inner member function template name <br/> |
| pparray = A Boost PP array whose elements are a sequence of valid instantiations for the |
| member function template parameters ie. '(3,(int,long,double))' etc. |
| |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "trait" where 'trait' is the first macro parameter. |
| |
| @code |
| |
| 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'. |
| The enclosing type can be a class, struct, or union. |
| OR |
| a pointer to member function as a single type |
| which encapsulates a single instantiation of |
| the member function template. |
| |
| BOOST_TTI_TP_R = (optional) the return type of the member function template |
| in a single instantiation of the member function template |
| if the first parameter is the enclosing type. |
| |
| BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence |
| if the first parameter is the enclosing type and the member function template parameters |
| are not empty. These parameters are a single instantiation of the member function template. |
| |
| BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template |
| 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 template type, |
| otherwise 'value' is false. |
| |
| @endcode |
| |
| */ |
| #define BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) \ |
| BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) \ |
| 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_hmft)<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); \ |
| }; \ |
| |
| /**/ |
| |
| /// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists. |
| /** |
| |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction. |
| The metafunction tests whether an inner member function template with a particular name exists. |
| The macro takes the form of BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,pparray) where |
| |
| name = inner member function template name <br/> |
| pparray = A Boost PP array whose elements are a sequence of valid instantiations for the |
| member function template parameters ie. '(3,(int,long,double))' etc. |
| |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "has_member_function_template_'name'" where 'name' is the first macro parameter. |
| |
| @code |
| |
| template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG> |
| struct has_member_function_template_'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'. |
| The enclosing type can be a class, struct, or union. |
| OR |
| a pointer to member function as a single type |
| which encapsulates a single instantiation of |
| the member function template. |
| |
| BOOST_TTI_TP_R = (optional) the return type of the member function template |
| in a single instantiation of the member function template |
| if the first parameter is the enclosing type. |
| |
| BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence |
| if the first parameter is the enclosing type and the member function template parameters |
| are not empty. These parameters are a single instantiation of the member function template. |
| |
| BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template |
| 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 template type, |
| otherwise 'value' is false. |
| |
| @endcode |
| |
| */ |
| #define BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,pparray) \ |
| BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \ |
| ( \ |
| BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE_GEN(name), \ |
| name, \ |
| pparray \ |
| ) \ |
| /**/ |
| |
| #endif // BOOST_PP_VARIADICS |
| |
| #endif // BOOST_TTI_MEMBER_FUNCTION_TEMPLATE_HPP |