1/* Copyright 2006-2009 Joaquin M Lopez Munoz.
2 * Distributed under the Boost Software License, Version 1.0.
3 * (See accompanying file LICENSE_1_0.txt or copy at
4 * http://www.boost.org/LICENSE_1_0.txt)
5 *
6 * See http://www.boost.org/libs/flyweight for library home page.
7 */
8
9#ifndef BOOST_FLYWEIGHT_STATIC_HOLDER_HPP
10#define BOOST_FLYWEIGHT_STATIC_HOLDER_HPP
11
12#if defined(_MSC_VER)
13#pragma once
14#endif
15
16#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
17#include <boost/flyweight/static_holder_fwd.hpp>
18#include <boost/flyweight/holder_tag.hpp>
19#include <boost/mpl/aux_/lambda_support.hpp>
20
21/* Simplest holder storing the T object as a local static variable.
22 */
23
24namespace boost{
25
26namespace flyweights{
27
28template<typename C>
29struct static_holder_class:holder_marker
30{
31 static C& get()
32 {
33 static C c;
34 return c;
35 }
36
37 typedef static_holder_class type;
38 BOOST_MPL_AUX_LAMBDA_SUPPORT(1,static_holder_class,(C))
39};
40
41/* static_holder_class specifier */
42
43struct static_holder:holder_marker
44{
45 template<typename C>
46 struct apply
47 {
48 typedef static_holder_class<C> type;
49 };
50};
51
52} /* namespace flyweights */
53
54} /* namespace boost */
55
56#endif
57

source code of boost/libs/flyweight/include/boost/flyweight/static_holder.hpp