williamr@2
|
1 |
//
|
williamr@2
|
2 |
//=======================================================================
|
williamr@2
|
3 |
// Copyright 1997, 1998, 1999, 2000 University of Notre Dame.
|
williamr@2
|
4 |
// Authors: Andrew Lumsdaine, Lie-Quan Lee, Jeremy G. Siek
|
williamr@2
|
5 |
//
|
williamr@2
|
6 |
// Distributed under the Boost Software License, Version 1.0. (See
|
williamr@2
|
7 |
// accompanying file LICENSE_1_0.txt or copy at
|
williamr@2
|
8 |
// http://www.boost.org/LICENSE_1_0.txt)
|
williamr@2
|
9 |
//=======================================================================
|
williamr@2
|
10 |
//
|
williamr@2
|
11 |
|
williamr@2
|
12 |
#ifndef BOOST_INDIRECT_CMP_HPP
|
williamr@2
|
13 |
#define BOOST_INDIRECT_CMP_HPP
|
williamr@2
|
14 |
|
williamr@2
|
15 |
#include <functional>
|
williamr@2
|
16 |
#include <boost/config.hpp>
|
williamr@2
|
17 |
#include <boost/property_map.hpp>
|
williamr@2
|
18 |
|
williamr@2
|
19 |
namespace boost {
|
williamr@2
|
20 |
|
williamr@2
|
21 |
//: indirect_cmp
|
williamr@2
|
22 |
//
|
williamr@2
|
23 |
// could also do this with compose_f_gx_hx, and the member binder...
|
williamr@2
|
24 |
//
|
williamr@2
|
25 |
//!category: functors
|
williamr@2
|
26 |
//!component: type
|
williamr@2
|
27 |
//!tparam: ReadablePropertyMap - a model of ReadablePropertyMap
|
williamr@2
|
28 |
//!definition: functor.h
|
williamr@2
|
29 |
template <class ReadablePropertyMap, class Compare>
|
williamr@2
|
30 |
class indirect_cmp {
|
williamr@2
|
31 |
public:
|
williamr@2
|
32 |
typedef typename boost::property_traits<ReadablePropertyMap>::value_type T;
|
williamr@2
|
33 |
typedef typename boost::property_traits<ReadablePropertyMap>::key_type K;
|
williamr@2
|
34 |
typedef K first_argument_type;
|
williamr@2
|
35 |
typedef K second_argument_type;
|
williamr@2
|
36 |
typedef T result_type;
|
williamr@2
|
37 |
inline indirect_cmp(const ReadablePropertyMap& df, const Compare& c = Compare())
|
williamr@2
|
38 |
: d(df), cmp(c) { }
|
williamr@2
|
39 |
|
williamr@2
|
40 |
template <class A, class B>
|
williamr@2
|
41 |
inline bool
|
williamr@2
|
42 |
operator()(const A& u, const B& v) const {
|
williamr@2
|
43 |
T du = get(d, u), dv = get(d, v);
|
williamr@2
|
44 |
return cmp(du, dv);
|
williamr@2
|
45 |
}
|
williamr@2
|
46 |
protected:
|
williamr@2
|
47 |
ReadablePropertyMap d;
|
williamr@2
|
48 |
Compare cmp;
|
williamr@2
|
49 |
};
|
williamr@2
|
50 |
|
williamr@2
|
51 |
template <typename Compare, typename ReadablePropertyMap>
|
williamr@2
|
52 |
indirect_cmp<ReadablePropertyMap, Compare>
|
williamr@2
|
53 |
make_indirect_cmp(const Compare& cmp, ReadablePropertyMap pmap) {
|
williamr@2
|
54 |
indirect_cmp<ReadablePropertyMap, Compare> p(pmap, cmp);
|
williamr@2
|
55 |
return p;
|
williamr@2
|
56 |
}
|
williamr@2
|
57 |
|
williamr@2
|
58 |
template <class ReadablePropertyMap>
|
williamr@2
|
59 |
class indirect_pmap {
|
williamr@2
|
60 |
public:
|
williamr@2
|
61 |
typedef typename boost::property_traits<ReadablePropertyMap>::value_type T;
|
williamr@2
|
62 |
typedef typename boost::property_traits<ReadablePropertyMap>::key_type K;
|
williamr@2
|
63 |
typedef K argument_type;
|
williamr@2
|
64 |
typedef T result_type;
|
williamr@2
|
65 |
inline indirect_pmap(const ReadablePropertyMap& df)
|
williamr@2
|
66 |
: d(df) { }
|
williamr@2
|
67 |
|
williamr@2
|
68 |
inline bool operator()(const K& u) const {
|
williamr@2
|
69 |
return get(d, u);
|
williamr@2
|
70 |
}
|
williamr@2
|
71 |
protected:
|
williamr@2
|
72 |
ReadablePropertyMap d;
|
williamr@2
|
73 |
};
|
williamr@2
|
74 |
|
williamr@2
|
75 |
template <typename ReadablePropertyMap>
|
williamr@2
|
76 |
indirect_pmap<ReadablePropertyMap>
|
williamr@2
|
77 |
make_indirect_pmap(ReadablePropertyMap pmap) {
|
williamr@2
|
78 |
indirect_pmap<ReadablePropertyMap> f(pmap);
|
williamr@2
|
79 |
return f;
|
williamr@2
|
80 |
}
|
williamr@2
|
81 |
|
williamr@2
|
82 |
|
williamr@2
|
83 |
} // namespace boost
|
williamr@2
|
84 |
|
williamr@2
|
85 |
|
williamr@2
|
86 |
#endif // GGCL_INDIRECT_CMP_HPP
|