| /* 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 |