115 lines
4.4 KiB
C++
115 lines
4.4 KiB
C++
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/* Copyright 2006-2014 Joaquin M Lopez Munoz.
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* Distributed under the Boost Software License, Version 1.0.
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* (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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*
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* See http://www.boost.org/libs/flyweight for library home page.
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*/
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#ifndef BOOST_FLYWEIGHT_DETAIL_DYN_PERFECT_FWD_HPP
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#define BOOST_FLYWEIGHT_DETAIL_DYN_PERFECT_FWD_HPP
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#if defined(_MSC_VER)
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#pragma once
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#endif
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#include <boost/config.hpp>
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#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
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#include <boost/preprocessor/arithmetic/add.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/seq/seq.hpp>
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#define BOOST_FLYWEIGHT_PERFECT_FWD_ARG(z,n,_) \
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BOOST_PP_CAT(T,n)&& BOOST_PP_CAT(t,n)
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#define BOOST_FLYWEIGHT_PERFECT_FWD_N_AUX(n,name,body) \
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template<BOOST_PP_ENUM_PARAMS(n,typename T)> \
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name(BOOST_PP_ENUM(n,BOOST_FLYWEIGHT_PERFECT_FWD_ARG,~)) \
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body((FORWARD)(n))
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#define BOOST_FLYWEIGHT_PERFECT_FWD_N(z,n,data) \
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BOOST_FLYWEIGHT_PERFECT_FWD_N_AUX( \
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n,BOOST_PP_SEQ_HEAD(data), \
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BOOST_PP_SEQ_HEAD(BOOST_PP_SEQ_TAIL(data)))
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#define BOOST_FLYWEIGHT_PERFECT_FWD_WITH_ARGS(name,body) \
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BOOST_PP_REPEAT_FROM_TO( \
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1,BOOST_PP_ADD(BOOST_FLYWEIGHT_LIMIT_PERFECT_FWD_ARGS,1), \
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BOOST_FLYWEIGHT_PERFECT_FWD_N,(name)(body))
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#define BOOST_FLYWEIGHT_PERFECT_FWD(name,body) \
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name()body((ENUM)(0)) \
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BOOST_FLYWEIGHT_PERFECT_FWD_WITH_ARGS(name,body)
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#else
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/* no rvalue refs -> [const] Tn& overloads */
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#include <boost/preprocessor/arithmetic/add.hpp>
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#include <boost/preprocessor/cat.hpp>
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#include <boost/preprocessor/repetition/enum.hpp>
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#include <boost/preprocessor/repetition/enum_params.hpp>
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#include <boost/preprocessor/repetition/repeat.hpp>
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#include <boost/preprocessor/repetition/repeat_from_to.hpp>
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#include <boost/preprocessor/seq/elem.hpp>
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#include <boost/preprocessor/seq/for_each_product.hpp>
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#include <boost/preprocessor/seq/seq.hpp>
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#include <boost/preprocessor/seq/size.hpp>
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#define BOOST_FLYWEIGHT_CONST(b) BOOST_PP_CAT(BOOST_FLYWEIGHT_CONST,b)
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#define BOOST_FLYWEIGHT_CONST0
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#define BOOST_FLYWEIGHT_CONST1 const
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/* if mask[n]==0 --> Tn& tn
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* if mask[n]==1 --> const Tn& tn
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*/
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#define BOOST_FLYWEIGHT_PERFECT_FWD_ARG(z,n,mask) \
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BOOST_FLYWEIGHT_CONST(BOOST_PP_SEQ_ELEM(n,mask)) \
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BOOST_PP_CAT(T,n)& BOOST_PP_CAT(t,n)
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/* overload accepting size(mask) args, where the template args are
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* marked const or not according to the given mask (a seq of 0 or 1)
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*/
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#define BOOST_FLYWEIGHT_PERFECT_FWD_MASK_AUX(r,name,body,mask) \
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template<BOOST_PP_ENUM_PARAMS(BOOST_PP_SEQ_SIZE(mask),typename T)> \
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name( \
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BOOST_PP_ENUM( \
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BOOST_PP_SEQ_SIZE(mask),BOOST_FLYWEIGHT_PERFECT_FWD_ARG,mask)) \
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body((ENUM)(BOOST_PP_SEQ_SIZE(mask)))
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#define BOOST_FLYWEIGHT_PERFECT_FWD_MASK(r,data) \
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BOOST_FLYWEIGHT_PERFECT_FWD_MASK_AUX( \
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r, \
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BOOST_PP_SEQ_ELEM(0,BOOST_PP_SEQ_HEAD(data)), \
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BOOST_PP_SEQ_ELEM(1,BOOST_PP_SEQ_HEAD(data)), \
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BOOST_PP_SEQ_TAIL(data))
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#define BOOST_FLYWEIGHT_01(z,n,_) ((0)(1))
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/* Perfect forwarding overloads accepting 1 to n args */
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#define BOOST_FLYWEIGHT_PERFECT_FWD_N(z,n,data) \
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BOOST_PP_SEQ_FOR_EACH_PRODUCT( \
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BOOST_FLYWEIGHT_PERFECT_FWD_MASK, \
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((data)) \
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BOOST_PP_REPEAT(n,BOOST_FLYWEIGHT_01,~))
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#define BOOST_FLYWEIGHT_PERFECT_FWD_WITH_ARGS(name,body) \
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BOOST_PP_REPEAT_FROM_TO( \
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1,BOOST_PP_ADD(BOOST_FLYWEIGHT_LIMIT_PERFECT_FWD_ARGS,1), \
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BOOST_FLYWEIGHT_PERFECT_FWD_N,(name)(body))
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#define BOOST_FLYWEIGHT_PERFECT_FWD(name,body) \
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name()body((ENUM)(0)) \
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BOOST_FLYWEIGHT_PERFECT_FWD_WITH_ARGS(name,body)
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#endif
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#endif
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