Chris@101: /* Copyright 2006-2014 Joaquin M Lopez Munoz.
Chris@16:  * Distributed under the Boost Software License, Version 1.0.
Chris@16:  * (See accompanying file LICENSE_1_0.txt or copy at
Chris@16:  * http://www.boost.org/LICENSE_1_0.txt)
Chris@16:  *
Chris@16:  * See http://www.boost.org/libs/flyweight for library home page.
Chris@16:  */
Chris@16: 
Chris@16: #ifndef BOOST_FLYWEIGHT_DETAIL_DEFAULT_VALUE_POLICY_HPP
Chris@16: #define BOOST_FLYWEIGHT_DETAIL_DEFAULT_VALUE_POLICY_HPP
Chris@16: 
Chris@101: #if defined(_MSC_VER)
Chris@16: #pragma once
Chris@16: #endif
Chris@16: 
Chris@101: #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
Chris@101: #include <boost/detail/workaround.hpp>
Chris@101: #include <boost/flyweight/detail/perfect_fwd.hpp>
Chris@16: #include <boost/flyweight/detail/value_tag.hpp>
Chris@16: 
Chris@16: /* Default value policy: the key is the same as the value.
Chris@16:  */
Chris@16: 
Chris@16: namespace boost{
Chris@16: 
Chris@16: namespace flyweights{
Chris@16: 
Chris@16: namespace detail{
Chris@16: 
Chris@16: template<typename Value>
Chris@16: struct default_value_policy:value_marker
Chris@16: {
Chris@16:   typedef Value key_type;
Chris@16:   typedef Value value_type;
Chris@16: 
Chris@16:   struct rep_type
Chris@16:   {
Chris@16:   /* template ctors */
Chris@16: 
Chris@101: #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)&&\
Chris@101:     !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)&&\
Chris@101:     BOOST_WORKAROUND(__GNUC__,<=4)&&(__GNUC__<4||__GNUC_MINOR__<=4)
Chris@101: 
Chris@101: /* GCC 4.4.2 (and probably prior) bug: the default ctor generated by the
Chris@101:  * variadic temmplate ctor below fails to value-initialize x.
Chris@101:  */
Chris@101: 
Chris@101:     rep_type():x(){}
Chris@101: #endif
Chris@101: 
Chris@101: #define BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY(args) \
Chris@101:   :x(BOOST_FLYWEIGHT_FORWARD(args)){}
Chris@101: 
Chris@101:   BOOST_FLYWEIGHT_PERFECT_FWD(
Chris@101:     explicit rep_type,
Chris@101:     BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY)
Chris@101: 
Chris@101: #undef BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY
Chris@101: 
Chris@101:     rep_type(const rep_type& r):x(r.x){}
Chris@101: 
Chris@101: #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
Chris@101:     rep_type(rep_type&& r):x(std::move(r.x)){}
Chris@101: #endif
Chris@16: 
Chris@16:     operator const value_type&()const{return x;}
Chris@16: 
Chris@16:     value_type x;
Chris@16:   };
Chris@16: 
Chris@16:   static void construct_value(const rep_type&){}
Chris@16:   static void copy_value(const rep_type&){}
Chris@101: 
Chris@101: #if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
Chris@101:   static void move_value(const rep_type&){}
Chris@101: #endif
Chris@16: };
Chris@16: 
Chris@16: } /* namespace flyweights::detail */
Chris@16: 
Chris@16: } /* namespace flyweights */
Chris@16: 
Chris@16: } /* namespace boost */
Chris@16: 
Chris@16: #endif