| /* 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 |