/* Copyright 2006-2019 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.
|
*/
|
|
#ifndef BOOST_FLYWEIGHT_DETAIL_DEFAULT_VALUE_POLICY_HPP
|
#define BOOST_FLYWEIGHT_DETAIL_DEFAULT_VALUE_POLICY_HPP
|
|
#if defined(_MSC_VER)
|
#pragma once
|
#endif
|
|
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
|
#include <boost/detail/workaround.hpp>
|
#include <boost/flyweight/detail/perfect_fwd.hpp>
|
#include <boost/flyweight/detail/value_tag.hpp>
|
|
/* Default value policy: the key is the same as the value.
|
*/
|
|
namespace boost{
|
|
namespace flyweights{
|
|
namespace detail{
|
|
template<typename Value>
|
struct default_value_policy:value_marker
|
{
|
typedef Value key_type;
|
typedef Value value_type;
|
|
struct rep_type
|
{
|
/* template ctors */
|
|
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)&&\
|
!defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES)&&\
|
BOOST_WORKAROUND(BOOST_GCC,<=40603)
|
/* GCC bug: the default ctor generated by the variadic template ctor below
|
* fails to value-initialize x.
|
*/
|
|
rep_type():x(){}
|
#endif
|
|
#define BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY(args) \
|
:x(BOOST_FLYWEIGHT_FORWARD(args)){}
|
|
BOOST_FLYWEIGHT_PERFECT_FWD(
|
explicit rep_type,
|
BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY)
|
|
#undef BOOST_FLYWEIGHT_PERFECT_FWD_CTR_BODY
|
|
rep_type(const rep_type& r):x(r.x){}
|
|
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
|
rep_type(rep_type&& r):x(std::move(r.x)){}
|
#endif
|
|
operator const value_type&()const{return x;}
|
|
value_type x;
|
};
|
|
static void construct_value(const rep_type&){}
|
static void copy_value(const rep_type&){}
|
|
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
|
static void move_value(const rep_type&){}
|
#endif
|
};
|
|
} /* namespace flyweights::detail */
|
|
} /* namespace flyweights */
|
|
} /* namespace boost */
|
|
#endif
|
