You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and dots ('.'), can be up to 35 characters long. Letters must be lowercase.
114 lines
2.5 KiB
114 lines
2.5 KiB
/* 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_HASHED_FACTORY_HPP |
|
#define BOOST_FLYWEIGHT_HASHED_FACTORY_HPP |
|
|
|
#if defined(_MSC_VER)&&(_MSC_VER>=1200) |
|
#pragma once |
|
#endif |
|
|
|
#include <boost/config.hpp> /* keep it first to prevent nasty warns in MSVC */ |
|
#include <boost/flyweight/factory_tag.hpp> |
|
#include <boost/flyweight/hashed_factory_fwd.hpp> |
|
#include <boost/multi_index_container.hpp> |
|
#include <boost/multi_index/identity.hpp> |
|
#include <boost/multi_index/hashed_index.hpp> |
|
#include <boost/mpl/aux_/lambda_support.hpp> |
|
#include <boost/mpl/if.hpp> |
|
|
|
/* Flyweight factory based on a hashed container implemented |
|
* with Boost.MultiIndex. |
|
*/ |
|
|
|
namespace boost{ |
|
|
|
namespace flyweights{ |
|
|
|
template< |
|
typename Entry,typename Key, |
|
typename Hash,typename Pred,typename Allocator |
|
> |
|
class hashed_factory_class:public factory_marker |
|
{ |
|
struct index_list: |
|
boost::mpl::vector1< |
|
multi_index::hashed_unique< |
|
multi_index::identity<Entry>, |
|
typename boost::mpl::if_< |
|
mpl::is_na<Hash>, |
|
hash<Key>, |
|
Hash |
|
>::type, |
|
typename boost::mpl::if_< |
|
mpl::is_na<Pred>, |
|
std::equal_to<Key>, |
|
Pred |
|
>::type |
|
> |
|
> |
|
{}; |
|
|
|
typedef multi_index::multi_index_container< |
|
Entry, |
|
index_list, |
|
typename boost::mpl::if_< |
|
mpl::is_na<Allocator>, |
|
std::allocator<Entry>, |
|
Allocator |
|
>::type |
|
> container_type; |
|
|
|
public: |
|
typedef const Entry* handle_type; |
|
|
|
handle_type insert(const Entry& x) |
|
{ |
|
return &*cont.insert(x).first; |
|
} |
|
|
|
void erase(handle_type h) |
|
{ |
|
cont.erase(cont.iterator_to(*h)); |
|
} |
|
|
|
static const Entry& entry(handle_type h){return *h;} |
|
|
|
private: |
|
container_type cont; |
|
|
|
public: |
|
typedef hashed_factory_class type; |
|
BOOST_MPL_AUX_LAMBDA_SUPPORT( |
|
5,hashed_factory_class,(Entry,Key,Hash,Pred,Allocator)) |
|
}; |
|
|
|
/* hashed_factory_class specifier */ |
|
|
|
template< |
|
typename Hash,typename Pred,typename Allocator |
|
BOOST_FLYWEIGHT_NOT_A_PLACEHOLDER_EXPRESSION_DEF |
|
> |
|
struct hashed_factory:factory_marker |
|
{ |
|
template<typename Entry,typename Key> |
|
struct apply: |
|
mpl::apply2< |
|
hashed_factory_class< |
|
boost::mpl::_1,boost::mpl::_2,Hash,Pred,Allocator |
|
>, |
|
Entry,Key |
|
> |
|
{}; |
|
}; |
|
|
|
} /* namespace flyweights */ |
|
|
|
} /* namespace boost */ |
|
|
|
#endif
|
|
|