update boost
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linx64/include/boost/tti/has_member_function_template.hpp
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311
linx64/include/boost/tti/has_member_function_template.hpp
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// (C) Copyright Edward Diener 2019
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// Use, modification and distribution are subject to the Boost Software License,
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// Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt).
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#if !defined(BOOST_TTI_MEMBER_FUNCTION_TEMPLATE_HPP)
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#define BOOST_TTI_MEMBER_FUNCTION_TEMPLATE_HPP
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#include <boost/config.hpp>
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#include <boost/function_types/property_tags.hpp>
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#include <boost/mpl/vector.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/tti/detail/ddeftype.hpp>
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#include <boost/tti/detail/dmem_fun_template.hpp>
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#include <boost/tti/gen/has_member_function_template_gen.hpp>
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#include <boost/tti/gen/namespace_gen.hpp>
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#if BOOST_PP_VARIADICS
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#include <boost/tti/detail/dmacro_fun_template.hpp>
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists.
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/**
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction.
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The metafunction tests whether an inner member function template with a particular name exists.
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The macro takes the form of BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,...) where
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trait = the name of the metafunction <br/>
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name = inner member function template name <br/>
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... = variadic parameters.
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The variadic parameter(s) are either:
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A sequence of valid instantiations for the member function template parameters
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ie. 'int,long,double' etc.
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or
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A single variadic parameter which is a Boost PP array whose elements are
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a sequence of valid instantiations for the member function template parameters
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ie. '(3,(int,long,double))' etc. This form is allowed in order to be compatible
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with using the non-variadic form of this macro.
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "trait" where 'trait' is the first macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG>
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struct trait
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type in which to look for our 'name'.
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The enclosing type can be a class, struct, or union.
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OR
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a pointer to member function as a single type
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which encapsulates a single instantiation of
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the member function template.
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BOOST_TTI_TP_R = (optional) the return type of the member function template
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in a single instantiation of the member function template
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if the first parameter is the enclosing type.
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BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence
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if the first parameter is the enclosing type and the member function template parameters
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are not empty. These parameters are a single instantiation of the member function template.
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BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template
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if the first parameter is the enclosing type and a tag is needed.
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returns = 'value' is true if the 'name' exists,
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with the appropriate member function template type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,...) \
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BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \
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( \
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trait, \
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name, \
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BOOST_TTI_DETAIL_FUN_TEMPLATE_VARIADIC_TO_ARRAY(__VA_ARGS__) \
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) \
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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> \
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struct trait \
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{ \
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typedef typename \
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BOOST_PP_CAT(trait,_detail_hmft)<BOOST_TTI_TP_T,BOOST_TTI_TP_R,BOOST_TTI_TP_FS,BOOST_TTI_TP_TAG>::type type; \
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BOOST_STATIC_CONSTANT(bool,value=type::value); \
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}; \
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/**/
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/// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists.
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/**
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction.
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The metafunction tests whether an inner member function template with a particular name exists.
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The macro takes the form of BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,...) where
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name = inner member function template name <br/>
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... = variadic parameters.
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The variadic parameter(s) are either:
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A sequence of valid instantiations for the member function template parameters
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ie. 'int,long,double' etc.
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or
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A single variadic parameter which is a Boost PP array whose elements are
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a sequence of valid instantiations for the member function template parameters
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ie. '(3,(int,long,double))' etc. This form is allowed in order to be compatible
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with using the non-variadic form of this macro.
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "has_member_function_template_'name'" where 'name' is the first macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG>
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struct has_member_function_template_'name'
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type in which to look for our 'name'.
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The enclosing type can be a class, struct, or union.
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OR
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a pointer to member function as a single type
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which encapsulates a single instantiation of
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the member function template.
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BOOST_TTI_TP_R = (optional) the return type of the member function template
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in a single instantiation of the member function template
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if the first parameter is the enclosing type.
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BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence
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if the first parameter is the enclosing type and the member function template parameters
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are not empty. These parameters are a single instantiation of the member function template.
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BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template
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if the first parameter is the enclosing type and a tag is needed.
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returns = 'value' is true if the 'name' exists,
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with the appropriate member function template type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,...) \
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \
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( \
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE_GEN(name), \
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name, \
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__VA_ARGS__ \
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) \
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/**/
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#else // !BOOST_PP_VARIADICS
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/*
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The succeeding comments in this file are in doxygen format.
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*/
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/** \file
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*/
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/// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists.
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/**
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction.
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The metafunction tests whether an inner member function template with a particular name exists.
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The macro takes the form of BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) where
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trait = the name of the metafunction <br/>
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name = inner member function template name <br/>
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pparray = A Boost PP array whose elements are a sequence of valid instantiations for the
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member function template parameters ie. '(3,(int,long,double))' etc.
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "trait" where 'trait' is the first macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG>
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struct trait
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type in which to look for our 'name'.
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The enclosing type can be a class, struct, or union.
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OR
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a pointer to member function as a single type
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which encapsulates a single instantiation of
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the member function template.
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BOOST_TTI_TP_R = (optional) the return type of the member function template
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in a single instantiation of the member function template
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if the first parameter is the enclosing type.
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BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence
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if the first parameter is the enclosing type and the member function template parameters
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are not empty. These parameters are a single instantiation of the member function template.
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BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template
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if the first parameter is the enclosing type and a tag is needed.
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returns = 'value' is true if the 'name' exists,
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with the appropriate member function template type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) \
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BOOST_TTI_DETAIL_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE(trait,name,pparray) \
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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> \
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struct trait \
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{ \
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typedef typename \
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BOOST_PP_CAT(trait,_detail_hmft)<BOOST_TTI_TP_T,BOOST_TTI_TP_R,BOOST_TTI_TP_FS,BOOST_TTI_TP_TAG>::type type; \
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BOOST_STATIC_CONSTANT(bool,value=type::value); \
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}; \
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/**/
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/// A macro which expands to a metafunction which tests whether an inner member function template with a particular name exists.
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/**
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE is a macro which expands to a metafunction.
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The metafunction tests whether an inner member function template with a particular name exists.
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The macro takes the form of BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,pparray) where
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name = inner member function template name <br/>
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pparray = A Boost PP array whose elements are a sequence of valid instantiations for the
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member function template parameters ie. '(3,(int,long,double))' etc.
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE generates a metafunction called "has_member_function_template_'name'" where 'name' is the first macro parameter.
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@code
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template<class BOOST_TTI_TP_T,class BOOST_TTI_R,class BOOST_TTI_FS,class BOOST_TTI_TAG>
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struct has_member_function_template_'name'
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{
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static const value = unspecified;
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typedef mpl::bool_<true-or-false> type;
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};
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The metafunction types and return:
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BOOST_TTI_TP_T = the enclosing type in which to look for our 'name'.
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The enclosing type can be a class, struct, or union.
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OR
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a pointer to member function as a single type
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which encapsulates a single instantiation of
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the member function template.
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BOOST_TTI_TP_R = (optional) the return type of the member function template
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in a single instantiation of the member function template
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if the first parameter is the enclosing type.
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BOOST_TTI_TP_FS = (optional) the parameters of the member function template as a boost::mpl forward sequence
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if the first parameter is the enclosing type and the member function template parameters
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are not empty. These parameters are a single instantiation of the member function template.
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BOOST_TTI_TP_TAG = (optional) a boost::function_types tag to apply to the member function template
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if the first parameter is the enclosing type and a tag is needed.
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returns = 'value' is true if the 'name' exists,
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with the appropriate member function template type,
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otherwise 'value' is false.
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@endcode
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*/
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#define BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE(name,pparray) \
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BOOST_TTI_TRAIT_HAS_MEMBER_FUNCTION_TEMPLATE \
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( \
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BOOST_TTI_HAS_MEMBER_FUNCTION_TEMPLATE_GEN(name), \
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name, \
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pparray \
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) \
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/**/
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#endif // BOOST_PP_VARIADICS
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#endif // BOOST_TTI_MEMBER_FUNCTION_TEMPLATE_HPP
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