63e88f80
 Hu Chunming
提交三方库
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/* Copyright 2006-2009 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_STATIC_HOLDER_HPP
#define BOOST_FLYWEIGHT_STATIC_HOLDER_HPP
#if defined(_MSC_VER)
#pragma once
#endif
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
#include <boost/flyweight/static_holder_fwd.hpp>
#include <boost/flyweight/holder_tag.hpp>
#include <boost/mpl/aux_/lambda_support.hpp>
/* Simplest holder storing the T object as a local static variable.
*/
namespace boost{
namespace flyweights{
template<typename C>
struct static_holder_class:holder_marker
{
static C& get()
{
static C c;
return c;
}
typedef static_holder_class type;
BOOST_MPL_AUX_LAMBDA_SUPPORT(1,static_holder_class,(C))
};
/* static_holder_class specifier */
struct static_holder:holder_marker
{
template<typename C>
struct apply
{
typedef static_holder_class<C> type;
};
};
} /* namespace flyweights */
} /* namespace boost */
#endif
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