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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
|
//
// Copyright (c) 2000-2002
// Joerg Walter, Mathias Koch
//
// 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)
//
// The authors gratefully acknowledge the support of
// GeNeSys mbH & Co. KG in producing this work.
//
#ifndef _BOOST_UBLAS_DEFINITIONS_
#define _BOOST_UBLAS_DEFINITIONS_
namespace boost { namespace numeric { namespace ublas {
namespace detail {
/* Borrowed from boost/concept_checks.hpp
"inline" is used for ignore_unused_variable_warning()
to make sure there is no overhead with g++.
*/
template <class T> inline
void ignore_unused_variable_warning(const T&) {}
} // namespace detail
// Borrowed from Dave Abraham's noncopyable.
// I believe this should be part of utility.hpp one day...
namespace nonassignable_ // protection from unintended ADL
{
class nonassignable {
protected:
nonassignable () {}
~nonassignable () {}
private: // emphasize the following members are private
const nonassignable& operator= (const nonassignable &);
}; // nonassignable
}
typedef nonassignable_::nonassignable nonassignable;
// Assignment proxy.
// Provides temporary free assigment when LHS has no alias on RHS
template<class C>
class noalias_proxy:
private nonassignable {
public:
typedef typename C::closure_type closure_type;
BOOST_UBLAS_INLINE
noalias_proxy (C& lval):
nonassignable (), lval_ (lval) {}
BOOST_UBLAS_INLINE
noalias_proxy (const noalias_proxy& p):
nonassignable (), lval_ (p.lval_) {}
template <class E>
BOOST_UBLAS_INLINE
closure_type &operator= (const E& e) {
lval_.assign (e);
return lval_;
}
template <class E>
BOOST_UBLAS_INLINE
closure_type &operator+= (const E& e) {
lval_.plus_assign (e);
return lval_;
}
template <class E>
BOOST_UBLAS_INLINE
closure_type &operator-= (const E& e) {
lval_.minus_assign (e);
return lval_;
}
private:
closure_type lval_;
};
// Improve syntax of efficient assignment where no aliases of LHS appear on the RHS
// noalias(lhs) = rhs_expression
template <class C>
BOOST_UBLAS_INLINE
noalias_proxy<C> noalias (C& lvalue) {
return noalias_proxy<C> (lvalue);
}
template <class C>
BOOST_UBLAS_INLINE
noalias_proxy<const C> noalias (const C& lvalue) {
return noalias_proxy<const C> (lvalue);
}
// Possible future compatible syntax where lvalue possible has an unsafe alias on the RHS
// safe(lhs) = rhs_expression
template <class C>
BOOST_UBLAS_INLINE
C& safe (C& lvalue) {
return lvalue;
}
template <class C>
BOOST_UBLAS_INLINE
const C& safe (const C& lvalue) {
return lvalue;
}
// Dimension accessors
namespace dimension {
// Generic accessors
template<unsigned dimension>
struct dimension_properties {};
template<>
struct dimension_properties<1> {
template <class E>
BOOST_UBLAS_INLINE static
typename E::size_type size (const vector_expression<E> &e) {
return e ().size ();
}
template <class E>
BOOST_UBLAS_INLINE static
typename E::size_type size (const matrix_expression<E> &e) {
return e ().size1 ();
}
// Note: Index functions cannot deduce dependant template parameter V or M from i
template <class V>
BOOST_UBLAS_INLINE static
typename V::size_type index (const typename V::iterator &i) {
return i.index ();
}
template <class M>
BOOST_UBLAS_INLINE static
typename M::size_type index (const typename M::iterator1 &i) {
return i.index1 ();
}
template <class M>
BOOST_UBLAS_INLINE static
typename M::size_type index (const typename M::iterator2 &i) {
return i.index1 ();
}
};
template<>
struct dimension_properties<2> {
template <class E>
BOOST_UBLAS_INLINE static
typename E::size_type size (const vector_expression<E> &) {
return 1;
}
template <class E>
BOOST_UBLAS_INLINE static
typename E::size_type size (const matrix_expression<E> &e) {
return e ().size2 ();
}
template <class V>
BOOST_UBLAS_INLINE static
typename V::size_type index (const typename V::iterator &) {
return 1;
}
template <class M>
BOOST_UBLAS_INLINE static
typename M::size_type index (const typename M::iterator1 &i) {
return i.index2 ();
}
template <class M>
BOOST_UBLAS_INLINE static
typename M::size_type index (const typename M::iterator2 &i) {
return i.index2 ();
}
};
template<unsigned dimension, class E>
BOOST_UBLAS_INLINE
typename E::size_type size (const E& e) {
return dimension_properties<dimension>::size (e);
}
template<unsigned dimension, class I>
BOOST_UBLAS_INLINE
typename I::container_type::size_type
index (const I& i) {
typedef typename I::container_type container_type;
return dimension_properties<dimension>::template index<container_type> (i);
}
// Named accessors - just syntactic sugar
template<class V>
typename V::size_type num_elements (const V &v) {
return v.size ();
}
template<class M>
typename M::size_type num_rows (const M &m) {
return m.size1 ();
}
template<class M>
typename M::size_type num_columns (const M &m) {
return m.size2 ();
}
template<class MV>
typename MV::size_type num_non_zeros (const MV &mv) {
return mv.non_zeros ();
}
}
}}}
#endif
|
