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
|
// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2009 Gael Guennebaud <g.gael@free.fr>
//
// Eigen is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// Alternatively, you can redistribute it and/or
// modify it under the terms of the GNU General Public License as
// published by the Free Software Foundation; either version 2 of
// the License, or (at your option) any later version.
//
// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License and a copy of the GNU General Public License along with
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#ifndef EIGEN_CWISE_UNARY_VIEW_H
#define EIGEN_CWISE_UNARY_VIEW_H
/** \class CwiseUnaryView
*
* \brief Generic lvalue expression of a coefficient-wise unary operator of a matrix or a vector
*
* \param ViewOp template functor implementing the view
* \param MatrixType the type of the matrix we are applying the unary operator
*
* This class represents a lvalue expression of a generic unary view operator of a matrix or a vector.
* It is the return type of real() and imag(), and most of the time this is the only way it is used.
*
* \sa MatrixBase::unaryViewExpr(const CustomUnaryOp &) const, class CwiseUnaryOp
*/
template<typename ViewOp, typename MatrixType>
struct ei_traits<CwiseUnaryView<ViewOp, MatrixType> >
: ei_traits<MatrixType>
{
typedef typename ei_result_of<
ViewOp(typename ei_traits<MatrixType>::Scalar)
>::type Scalar;
typedef typename MatrixType::Nested MatrixTypeNested;
typedef typename ei_cleantype<MatrixTypeNested>::type _MatrixTypeNested;
enum {
Flags = (ei_traits<_MatrixTypeNested>::Flags & (HereditaryBits | LinearAccessBit | AlignedBit)),
CoeffReadCost = ei_traits<_MatrixTypeNested>::CoeffReadCost + ei_functor_traits<ViewOp>::Cost
};
};
template<typename ViewOp, typename MatrixType>
class CwiseUnaryView : public MatrixBase<CwiseUnaryView<ViewOp, MatrixType> >
{
public:
EIGEN_GENERIC_PUBLIC_INTERFACE(CwiseUnaryView)
inline CwiseUnaryView(const MatrixType& mat, const ViewOp& func = ViewOp())
: m_matrix(mat), m_functor(func) {}
EIGEN_INHERIT_ASSIGNMENT_OPERATORS(CwiseUnaryView)
EIGEN_STRONG_INLINE int rows() const { return m_matrix.rows(); }
EIGEN_STRONG_INLINE int cols() const { return m_matrix.cols(); }
EIGEN_STRONG_INLINE const Scalar coeff(int row, int col) const
{
return m_functor(m_matrix.coeff(row, col));
}
EIGEN_STRONG_INLINE const Scalar coeff(int index) const
{
return m_functor(m_matrix.coeff(index));
}
EIGEN_STRONG_INLINE Scalar& coeffRef(int row, int col)
{
return m_functor(m_matrix.const_cast_derived().coeffRef(row, col));
}
EIGEN_STRONG_INLINE Scalar& coeffRef(int index)
{
return m_functor(m_matrix.const_cast_derived().coeffRef(index));
}
protected:
// FIXME changed from MatrixType::Nested because of a weird compilation error with sun CC
const typename ei_nested<MatrixType>::type m_matrix;
const ViewOp m_functor;
};
/** \returns an expression of a custom coefficient-wise unary operator \a func of *this
*
* The template parameter \a CustomUnaryOp is the type of the functor
* of the custom unary operator.
*
* Example:
* \include class_CwiseUnaryOp.cpp
* Output: \verbinclude class_CwiseUnaryOp.out
*
* \sa class CwiseUnaryOp, class CwiseBinarOp, MatrixBase::operator-, Cwise::abs
*/
template<typename Derived>
template<typename CustomViewOp>
EIGEN_STRONG_INLINE const CwiseUnaryView<CustomViewOp, Derived>
MatrixBase<Derived>::unaryViewExpr(const CustomViewOp& func) const
{
return CwiseUnaryView<CustomViewOp, Derived>(derived(), func);
}
/** \returns a non const expression of the real part of \c *this.
*
* \sa imag() */
template<typename Derived>
EIGEN_STRONG_INLINE typename MatrixBase<Derived>::NonConstRealReturnType
MatrixBase<Derived>::real() { return derived(); }
/** \returns a non const expression of the imaginary part of \c *this.
*
* \sa real() */
template<typename Derived>
EIGEN_STRONG_INLINE typename MatrixBase<Derived>::NonConstImagReturnType
MatrixBase<Derived>::imag() { return derived(); }
#endif // EIGEN_CWISE_UNARY_VIEW_H
|
