Please, help us to better know about our user community by answering the following short survey: https://forms.gle/wpyrxWi18ox9Z5ae9
Eigen  3.4.0
 
Loading...
Searching...
No Matches
CwiseUnaryView.h
1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
5//
6// This Source Code Form is subject to the terms of the Mozilla
7// Public License v. 2.0. If a copy of the MPL was not distributed
8// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9
10#ifndef EIGEN_CWISE_UNARY_VIEW_H
11#define EIGEN_CWISE_UNARY_VIEW_H
12
13namespace Eigen {
14
15namespace internal {
16template<typename ViewOp, typename MatrixType>
17struct traits<CwiseUnaryView<ViewOp, MatrixType> >
18 : traits<MatrixType>
19{
20 typedef typename result_of<
21 ViewOp(const typename traits<MatrixType>::Scalar&)
22 >::type Scalar;
23 typedef typename MatrixType::Nested MatrixTypeNested;
24 typedef typename remove_all<MatrixTypeNested>::type _MatrixTypeNested;
25 enum {
26 FlagsLvalueBit = is_lvalue<MatrixType>::value ? LvalueBit : 0,
27 Flags = traits<_MatrixTypeNested>::Flags & (RowMajorBit | FlagsLvalueBit | DirectAccessBit), // FIXME DirectAccessBit should not be handled by expressions
28 MatrixTypeInnerStride = inner_stride_at_compile_time<MatrixType>::ret,
29 // need to cast the sizeof's from size_t to int explicitly, otherwise:
30 // "error: no integral type can represent all of the enumerator values
31 InnerStrideAtCompileTime = MatrixTypeInnerStride == Dynamic
32 ? int(Dynamic)
33 : int(MatrixTypeInnerStride) * int(sizeof(typename traits<MatrixType>::Scalar) / sizeof(Scalar)),
34 OuterStrideAtCompileTime = outer_stride_at_compile_time<MatrixType>::ret == Dynamic
35 ? int(Dynamic)
36 : outer_stride_at_compile_time<MatrixType>::ret * int(sizeof(typename traits<MatrixType>::Scalar) / sizeof(Scalar))
37 };
38};
39}
40
41template<typename ViewOp, typename MatrixType, typename StorageKind>
42class CwiseUnaryViewImpl;
43
57template<typename ViewOp, typename MatrixType>
58class CwiseUnaryView : public CwiseUnaryViewImpl<ViewOp, MatrixType, typename internal::traits<MatrixType>::StorageKind>
59{
60 public:
61
62 typedef typename CwiseUnaryViewImpl<ViewOp, MatrixType,typename internal::traits<MatrixType>::StorageKind>::Base Base;
63 EIGEN_GENERIC_PUBLIC_INTERFACE(CwiseUnaryView)
64 typedef typename internal::ref_selector<MatrixType>::non_const_type MatrixTypeNested;
65 typedef typename internal::remove_all<MatrixType>::type NestedExpression;
66
67 explicit EIGEN_DEVICE_FUNC inline CwiseUnaryView(MatrixType& mat, const ViewOp& func = ViewOp())
68 : m_matrix(mat), m_functor(func) {}
69
70 EIGEN_INHERIT_ASSIGNMENT_OPERATORS(CwiseUnaryView)
71
72 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE EIGEN_CONSTEXPR
73 Index rows() const EIGEN_NOEXCEPT { return m_matrix.rows(); }
74 EIGEN_DEVICE_FUNC EIGEN_STRONG_INLINE EIGEN_CONSTEXPR
75 Index cols() const EIGEN_NOEXCEPT { return m_matrix.cols(); }
76
78 EIGEN_DEVICE_FUNC const ViewOp& functor() const { return m_functor; }
79
81 EIGEN_DEVICE_FUNC const typename internal::remove_all<MatrixTypeNested>::type&
82 nestedExpression() const { return m_matrix; }
83
85 EIGEN_DEVICE_FUNC typename internal::remove_reference<MatrixTypeNested>::type&
86 nestedExpression() { return m_matrix; }
87
88 protected:
89 MatrixTypeNested m_matrix;
90 ViewOp m_functor;
91};
92
93// Generic API dispatcher
94template<typename ViewOp, typename XprType, typename StorageKind>
95class CwiseUnaryViewImpl
96 : public internal::generic_xpr_base<CwiseUnaryView<ViewOp, XprType> >::type
97{
98public:
99 typedef typename internal::generic_xpr_base<CwiseUnaryView<ViewOp, XprType> >::type Base;
100};
101
102template<typename ViewOp, typename MatrixType>
103class CwiseUnaryViewImpl<ViewOp,MatrixType,Dense>
104 : public internal::dense_xpr_base< CwiseUnaryView<ViewOp, MatrixType> >::type
105{
106 public:
107
108 typedef CwiseUnaryView<ViewOp, MatrixType> Derived;
109 typedef typename internal::dense_xpr_base< CwiseUnaryView<ViewOp, MatrixType> >::type Base;
110
111 EIGEN_DENSE_PUBLIC_INTERFACE(Derived)
112 EIGEN_INHERIT_ASSIGNMENT_OPERATORS(CwiseUnaryViewImpl)
113
114 EIGEN_DEVICE_FUNC inline Scalar* data() { return &(this->coeffRef(0)); }
115 EIGEN_DEVICE_FUNC inline const Scalar* data() const { return &(this->coeff(0)); }
116
117 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index innerStride() const
118 {
119 return derived().nestedExpression().innerStride() * sizeof(typename internal::traits<MatrixType>::Scalar) / sizeof(Scalar);
120 }
121
122 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index outerStride() const
123 {
124 return derived().nestedExpression().outerStride() * sizeof(typename internal::traits<MatrixType>::Scalar) / sizeof(Scalar);
125 }
126 protected:
127 EIGEN_DEFAULT_EMPTY_CONSTRUCTOR_AND_DESTRUCTOR(CwiseUnaryViewImpl)
128};
129
130} // end namespace Eigen
131
132#endif // EIGEN_CWISE_UNARY_VIEW_H
Generic lvalue expression of a coefficient-wise unary operator of a matrix or a vector.
Definition: CwiseUnaryView.h:59
const ViewOp & functor() const
Definition: CwiseUnaryView.h:78
internal::remove_reference< MatrixTypeNested >::type & nestedExpression()
Definition: CwiseUnaryView.h:86
const internal::remove_all< MatrixTypeNested >::type & nestedExpression() const
Definition: CwiseUnaryView.h:82
const unsigned int DirectAccessBit
Definition: Constants.h:155
const unsigned int LvalueBit
Definition: Constants.h:144
const unsigned int RowMajorBit
Definition: Constants.h:66
Namespace containing all symbols from the Eigen library.
Definition: Core:141
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:74
const int Dynamic
Definition: Constants.h:22