mirror of
https://github.com/triqs/dft_tools
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61 lines
3.0 KiB
C++
61 lines
3.0 KiB
C++
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/*******************************************************************************
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*
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* TRIQS: a Toolbox for Research in Interacting Quantum Systems
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*
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* Copyright (C) 2011 by O. Parcollet
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*
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* TRIQS is free software: you can redistribute it and/or modify it under the
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* terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* TRIQS is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* TRIQS. If not, see <http://www.gnu.org/licenses/>.
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*
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******************************************************************************/
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//#include <boost/preprocessor/punctuation/comma_if.hpp>
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#include <boost/preprocessor/seq.hpp>
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/**
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* Usage :
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* - The macro TRIQS_MAKE_TRAIT_HAS_METHOD ( ReturnType, ArgTypeList, Name, NickName )
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* defines a trait called has_method_NickName such that :
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* has_method_NickName<T>::value is true iff
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* ReturnType T::Name(ArgTypeList)
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* is a valid signature
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*
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* - The macro TRIQS_MAKE_TRAIT_HAS_CONST_METHOD ( ReturnType, ArgTypeList, Name, NickName )
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* defines a trait called has_method_NickName such that :
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* has_method_NickName<T>::value is true iff
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* ReturnType T::Name(ArgTypeList) const
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* is a valid signature
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*
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* - Where :
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* ArgTypeList is a boost preprocessor sequence e.g.
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* TRIQS_MAKE_TRAIT_HAS_CONST_METHOD (void, (int)(double)(string), Truc, Truc)
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* makes the trait to check if a object A has method :
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* void A::Truc(int,double,string) const
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*
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*/
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#define TRIQS_MAKE_TRAIT_HAS_METHOD_AUX(r,s,p,XX) BOOST_PP_COMMA_IF(p) XX
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#define TRIQS_MAKE_TRAIT_HAS_METHOD_IMPL( ReturnType, ArgTypeList, Name, NickName, CONST )\
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template<typename T> struct has_method_##NickName {\
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typedef char yes[1]; typedef char no[2];\
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template<typename U, ReturnType (U::*)(BOOST_PP_SEQ_FOR_EACH_I (TRIQS_MAKE_TRAIT_HAS_METHOD_AUX,~,ArgTypeList)) CONST> struct SFINAE {};\
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template<typename U> static yes& Test(SFINAE<U, &U::Name>*);\
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template<typename U> static no& Test(...);\
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static const bool value = sizeof(Test<T>(0)) == sizeof(yes);\
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};
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#define TRIQS_MAKE_TRAIT_HAS_METHOD( ReturnType, ArgTypeList, Name, NickName) TRIQS_MAKE_TRAIT_HAS_METHOD_IMPL(ReturnType,ArgTypeList,Name,NickName,)
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#define TRIQS_MAKE_TRAIT_HAS_CONST_METHOD( ReturnType, ArgTypeList, Name, NickName) TRIQS_MAKE_TRAIT_HAS_METHOD_IMPL(ReturnType,ArgTypeList,Name,NickName,const)
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//#define TRIQS_MAKE_TRAIT_HAS_METHOD_TPL( ReturnType, ArgTypeList, TPL,Name, NickName) TRIQS_MAKE_TRAIT_HAS_METHOD_IMPL(ReturnType,ArgTypeList,Name,NickName,,TPL)
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//#define TRIQS_MAKE_TRAIT_HAS_CONST_METHOD_TPL( ReturnType, ArgTypeList, TPL, Name, NickName) TRIQS_MAKE_TRAIT_HAS_METHOD_IMPL(ReturnType,ArgTypeList,Name,NickName,const,TPL)
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