Repository navigation
Expand file tree
/
Copy pathhashed_factory.hpp
More file actions
125 lines (104 loc) · 2.68 KB
/
Copy pathhashed_factory.hpp
File metadata and controls
125 lines (104 loc) · 2.68 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
/* Copyright 2006-2014 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)
#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>
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
#include <utility>
#endif
/* 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;
}
#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES)
handle_type insert(Entry&& x)
{
return &*cont.insert(std::move(x)).first;
}
#endif
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