1 /*
 2  *   Copyright (c) 2010, Michael Lehn
 3  *
 4  *   All rights reserved.
 5  *
 6  *   Redistribution and use in source and binary forms, with or without
 7  *   modification, are permitted provided that the following conditions
 8  *   are met:
 9  *
10  *   1) Redistributions of source code must retain the above copyright
11  *      notice, this list of conditions and the following disclaimer.
12  *   2) Redistributions in binary form must reproduce the above copyright
13  *      notice, this list of conditions and the following disclaimer in
14  *      the documentation and/or other materials provided with the
15  *      distribution.
16  *   3) Neither the name of the FLENS development group nor the names of
17  *      its contributors may be used to endorse or promote products derived
18  *      from this software without specific prior written permission.
19  *
20  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
29  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31  */
32 
33 #ifndef FLENS_MATRIXTYPES_GENERAL_IMPL_GE_ELEMENTCLOSURE_H
34 #define FLENS_MATRIXTYPES_GENERAL_IMPL_GE_ELEMENTCLOSURE_H 1
35 
36 #include <flens/aux/range.h>
37 #include <flens/scalartypes/scalar.h>
38 #include <flens/vectortypes/vector.h>
39 
40 namespace flens { namespace gematrix {
41 
42 template <typename M>
43 class ElementClosure
44     : public Scalar<ElementClosure<M> >
45 {
46     public:
47         typedef M                               Matrix;
48         typedef typename Matrix::ElementType    ElementType;
49         typedef typename Matrix::IndexVariable  IndexVariable;
50 
51         ElementClosure(Matrix &matrix, IndexVariable &row, IndexVariable &col);
52 
53         void
54         operator=(const ElementType &rhs);
55 
56         template <typename S>
57             void
58             operator=(const Scalar<S> &rhs);
59 
60         void
61         operator=(const ElementClosure &rhs);
62 
63         const ElementType &
64         value() const;
65 
66         ElementType &
67         value();
68 
69     private:
70         Matrix         &_matrix;
71         IndexVariable  &_row;
72         IndexVariable  &_col;
73 };
74 
75 } } // namespace gematrix, flens
76 
77 #endif // FLENS_MATRIXTYPES_GENERAL_IMPL_GE_ELEMENTCLOSURE_H