boost/flyweight/no_tracking.hpp

   1 /* Copyright 2006-2008 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_NO_TRACKING_HPP
  10 #define BOOST_FLYWEIGHT_NO_TRACKING_HPP
  11
  12 #if defined(_MSC_VER)&&(_MSC_VER>=1200)
  13 #pragma once
  14 #endif
  15
  16 #include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */
  17 #include <boost/flyweight/no_tracking_fwd.hpp>
  18 #include <boost/flyweight/tracking_tag.hpp>
  19
  20 /* Null tracking policy: elements are never erased from the factory.
  21  */
  22
  23 namespace boost{
  24
  25 namespace flyweights{
  26
  27 struct no_tracking:tracking_marker
  28 {
  29   struct entry_type
  30   {
  31     template<typename Value,typename Key>
  32     struct apply{typedef Value type;};
  33   };
  34
  35   struct handle_type
  36   {
  37     template<typename Handle,typename TrackingHelper>
  38     struct apply{typedef Handle type;};
  39   };
  40 };
  41
  42 } /* namespace flyweights */
  43
  44 } /* namespace boost */
  45
  46 #endif