ceph/src/boost/libs/flyweight/include/boost/flyweight/set_factory.hpp

   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_SET_FACTORY_HPP
  10 #define BOOST_FLYWEIGHT_SET_FACTORY_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/detail/allocator_utilities.hpp>
  18 #include <boost/flyweight/assoc_container_factory.hpp>
  19 #include <boost/flyweight/factory_tag.hpp>
  20 #include <boost/flyweight/set_factory_fwd.hpp>
  21 #include <boost/mpl/aux_/lambda_support.hpp>
  22 #include <boost/mpl/if.hpp>
  23 #include <set>
  24
  25 /* Particularization of assoc_container_factory_class using a set.
  26  */
  27
  28 namespace boost{
  29
  30 namespace flyweights{
  31
  32 template<
  33   typename Entry,typename Key,
  34   typename Compare,typename Allocator
  35 >
  36 class set_factory_class:
  37   public assoc_container_factory_class<
  38     std::set<
  39       Entry,
  40       typename boost::mpl::if_<
  41         mpl::is_na<Compare>,
  42         std::less<Key>,
  43         Compare
  44       >::type,
  45       typename boost::mpl::if_<
  46         mpl::is_na<Allocator>,
  47         std::allocator<Entry>,
  48         Allocator
  49       >::type
  50     >
  51   >
  52 {
  53 public:
  54   typedef set_factory_class type;
  55   BOOST_MPL_AUX_LAMBDA_SUPPORT(
  56     4,set_factory_class,(Entry,Key,Compare,Allocator))
  57 };
  58
  59 /* set_factory_class specifier */
  60
  61 template<
  62   typename Compare,typename Allocator
  63   BOOST_FLYWEIGHT_NOT_A_PLACEHOLDER_EXPRESSION_DEF
  64 >
  65 struct set_factory:factory_marker
  66 {
  67   template<typename Entry,typename Key>
  68   struct apply:
  69     mpl::apply2<
  70       set_factory_class<
  71         boost::mpl::_1,boost::mpl::_2,Compare,Allocator
  72       >,
  73       Entry,Key
  74     >
  75   {};
  76 };
  77
  78 } /* namespace flyweights */
  79
  80 } /* namespace boost */
  81
  82 #endif