COIN-OR::LEMON - Graph Library

source: lemon-0.x/lemon/traits.h @ 1852:ffa7c6e96330

Last change on this file since 1852:ffa7c6e96330 was 1790:c7dd9d8c770a, checked in by Balazs Dezso, 14 years ago

Bug fix

File size: 4.1 KB
Line 
1/* -*- C++ -*-
2 * lemon/traits.h - Part of LEMON, a generic C++ optimization library
3 *
4 * Copyright (C) 2005 Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
5 * (Egervary Research Group on Combinatorial Optimization, EGRES).
6 *
7 * Permission to use, modify and distribute this software is granted
8 * provided that this copyright notice appears in all copies. For
9 * precise terms see the accompanying LICENSE file.
10 *
11 * This software is provided "AS IS" with no warranty of any kind,
12 * express or implied, and with no claim as to its suitability for any
13 * purpose.
14 *
15 */
16
17#ifndef LEMON_TRAITS_H
18#define LEMON_TRAITS_H
19
20#include <lemon/utility.h>
21
22///\file
23///\brief Traits for graphs and maps
24///
25
26namespace lemon {
27  template <typename _Graph, typename _Item>
28  class ItemSetTraits {};
29 
30  template <typename _Graph>
31  class ItemSetTraits<_Graph, typename _Graph::Node> {
32  public:
33   
34    typedef _Graph Graph;
35
36    typedef typename Graph::Node Item;
37    typedef typename Graph::NodeIt ItemIt;
38
39    template <typename _Value>
40    class Map : public Graph::template NodeMap<_Value> {
41    public:
42      typedef typename Graph::template NodeMap<_Value> Parent;
43      typedef typename Parent::Value Value;
44
45      Map(const Graph& _graph) : Parent(_graph) {}
46      Map(const Graph& _graph, const Value& _value)
47        : Parent(_graph, _value) {}
48    };
49
50  };
51
52  template <typename _Graph>
53  class ItemSetTraits<_Graph, typename _Graph::Edge> {
54  public:
55   
56    typedef _Graph Graph;
57
58    typedef typename Graph::Edge Item;
59    typedef typename Graph::EdgeIt ItemIt;
60
61    template <typename _Value>
62    class Map : public Graph::template EdgeMap<_Value> {
63    public:
64      typedef typename Graph::template EdgeMap<_Value> Parent;
65      typedef typename Parent::Value Value;
66
67      Map(const Graph& _graph) : Parent(_graph) {}
68      Map(const Graph& _graph, const Value& _value)
69        : Parent(_graph, _value) {}
70    };
71
72  };
73
74  template <typename _Graph>
75  class ItemSetTraits<_Graph, typename _Graph::UndirEdge> {
76  public:
77   
78    typedef _Graph Graph;
79
80    typedef typename Graph::UndirEdge Item;
81    typedef typename Graph::UndirEdgeIt ItemIt;
82
83    template <typename _Value>
84    class Map : public Graph::template UndirEdgeMap<_Value> {
85    public:
86      typedef typename Graph::template UndirEdgeMap<_Value> Parent;
87      typedef typename Parent::Value Value;
88
89      Map(const Graph& _graph) : Parent(_graph) {}
90      Map(const Graph& _graph, const Value& _value)
91        : Parent(_graph, _value) {}
92    };
93
94  };
95
96  template <typename Map, typename Enable = void>
97  struct MapTraits {
98    typedef False ReferenceMapTag;
99
100    typedef typename Map::Key Key;
101    typedef typename Map::Value Value;
102
103    typedef const Value ConstReturnValue;
104    typedef const Value ReturnValue;
105  };
106
107  template <typename Map>
108  struct MapTraits<
109    Map, typename enable_if<typename Map::ReferenceMapTag, void>::type >
110  {
111    typedef True ReferenceMapTag;
112   
113    typedef typename Map::Key Key;
114    typedef typename Map::Value Value;
115
116    typedef typename Map::ConstReference ConstReturnValue;
117    typedef typename Map::Reference ReturnValue;
118
119    typedef typename Map::ConstReference ConstReference;
120    typedef typename Map::Reference Reference;
121 };
122
123  // Indicators for the tags
124
125  template <typename Graph, typename Enable = void>
126  struct NodeNumTagIndicator {
127    static const bool value = false;
128  };
129
130  template <typename Graph>
131  struct NodeNumTagIndicator<
132    Graph,
133    typename enable_if<typename Graph::NodeNumTag, void>::type
134  > {
135    static const bool value = true;
136  };
137
138  template <typename Graph, typename Enable = void>
139  struct EdgeNumTagIndicator {
140    static const bool value = false;
141  };
142
143  template <typename Graph>
144  struct EdgeNumTagIndicator<
145    Graph,
146    typename enable_if<typename Graph::EdgeNumTag, void>::type
147  > {
148    static const bool value = true;
149  };
150
151  template <typename Graph, typename Enable = void>
152  struct FindEdgeTagIndicator {
153    static const bool value = false;
154  };
155
156  template <typename Graph>
157  struct FindEdgeTagIndicator<
158    Graph,
159    typename enable_if<typename Graph::FindEdgeTag, void>::type
160  > {
161    static const bool value = true;
162  };
163
164
165
166}
167
168#endif // LEMON_MAPS_H
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