boost/flyweight/detail/dyn_perfect_fwd.hpp
/* Copyright 2006-2008 Joaquin M Lopez Munoz. * Distributed under 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) * * See http://www.boost.org/libs/flyweight for library home page. */ /* no include guards */ #include <boost/preprocessor/arithmetic/add.hpp> #include <boost/preprocessor/cat.hpp> #include <boost/preprocessor/repetition/enum.hpp> #include <boost/preprocessor/repetition/enum_params.hpp> #include <boost/preprocessor/repetition/repeat.hpp> #include <boost/preprocessor/repetition/repeat_from_to.hpp> #include <boost/preprocessor/seq/elem.hpp> #include <boost/preprocessor/seq/for_each_product.hpp> #include <boost/preprocessor/seq/size.hpp> #define BOOST_FLYWEIGHT_CONST(b) BOOST_PP_CAT(BOOST_FLYWEIGHT_CONST,b) #define BOOST_FLYWEIGHT_CONST0 #define BOOST_FLYWEIGHT_CONST1 const /* if mask[n]==0 --> Tn& tn * if mask[n]==1 --> const Tn& tn */ #define BOOST_FLYWEIGHT_PERFECT_FWD_ARG(z,n,mask) \ BOOST_FLYWEIGHT_CONST(BOOST_PP_SEQ_ELEM(n,mask)) \ BOOST_PP_CAT(T,n)& BOOST_PP_CAT(t,n) /* overload accepting size(mask) args, where the template args are * marked const or not according to the given mask (a seq of 0 or 1) */ #define BOOST_FLYWEIGHT_PERFECT_FWD(r,mask) \ template<BOOST_PP_ENUM_PARAMS(BOOST_PP_SEQ_SIZE(mask),typename T)> \ BOOST_FLYWEIGHT_PERFECT_FWD_NAME( \ BOOST_PP_ENUM( \ BOOST_PP_SEQ_SIZE(mask),BOOST_FLYWEIGHT_PERFECT_FWD_ARG,mask)) \ BOOST_FLYWEIGHT_PERFECT_FWD_BODY(BOOST_PP_SEQ_SIZE(mask)) #define BOOST_FLYWEIGHT_01(z,n,_) ((0)(1)) /* Perfect forwarding overloads accepting 1 to n args */ #define BOOST_FLYWEIGHT_PERFECT_FWDS_N(z,n,_) \ BOOST_PP_SEQ_FOR_EACH_PRODUCT( \ BOOST_FLYWEIGHT_PERFECT_FWD, \ BOOST_PP_REPEAT(n,BOOST_FLYWEIGHT_01,~)) #define BOOST_FLYWEIGHT_PERFECT_FWD_OVERLOADS \ BOOST_PP_REPEAT_FROM_TO( \ 1,BOOST_PP_ADD(BOOST_FLYWEIGHT_LIMIT_PERFECT_FWD_ARGS,1), \ BOOST_FLYWEIGHT_PERFECT_FWDS_N,~) /* generate the overloads */ BOOST_FLYWEIGHT_PERFECT_FWD_OVERLOADS /* clean up */ #undef BOOST_FLYWEIGHT_PERFECT_FWD_OVERLOADS #undef BOOST_FLYWEIGHT_01 #undef BOOST_FLYWEIGHT_PERFECT_FWD #undef BOOST_FLYWEIGHT_PERFECT_FWD_ARG #undef BOOST_FLYWEIGHT_CONST1 #undef BOOST_FLYWEIGHT_CONST0 #undef BOOST_FLYWEIGHT_CONST /* user supplied argument macros */ #undef BOOST_FLYWEIGHT_PERFECT_FWD_BODY #undef BOOST_FLYWEIGHT_PERFECT_FWD_NAME