Eigen  3.2.92
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 
13 namespace Eigen {
14 
29 namespace internal {
30 template<typename ViewOp, typename MatrixType>
31 struct traits<CwiseUnaryView<ViewOp, MatrixType> >
32  : traits<MatrixType>
33 {
34  typedef typename result_of<
35  ViewOp(typename traits<MatrixType>::Scalar)
36  >::type Scalar;
37  typedef typename MatrixType::Nested MatrixTypeNested;
38  typedef typename remove_all<MatrixTypeNested>::type _MatrixTypeNested;
39  enum {
40  FlagsLvalueBit = is_lvalue<MatrixType>::value ? LvalueBit : 0,
41  Flags = traits<_MatrixTypeNested>::Flags & (RowMajorBit | FlagsLvalueBit | DirectAccessBit), // FIXME DirectAccessBit should not be handled by expressions
42  MatrixTypeInnerStride = inner_stride_at_compile_time<MatrixType>::ret,
43  // need to cast the sizeof's from size_t to int explicitly, otherwise:
44  // "error: no integral type can represent all of the enumerator values
45  InnerStrideAtCompileTime = MatrixTypeInnerStride == Dynamic
46  ? int(Dynamic)
47  : int(MatrixTypeInnerStride) * int(sizeof(typename traits<MatrixType>::Scalar) / sizeof(Scalar)),
48  OuterStrideAtCompileTime = outer_stride_at_compile_time<MatrixType>::ret == Dynamic
49  ? int(Dynamic)
50  : outer_stride_at_compile_time<MatrixType>::ret * int(sizeof(typename traits<MatrixType>::Scalar) / sizeof(Scalar))
51  };
52 };
53 }
54 
55 template<typename ViewOp, typename MatrixType, typename StorageKind>
56 class CwiseUnaryViewImpl;
57 
58 template<typename ViewOp, typename MatrixType>
59 class CwiseUnaryView : public CwiseUnaryViewImpl<ViewOp, MatrixType, typename internal::traits<MatrixType>::StorageKind>
60 {
61  public:
62 
63  typedef typename CwiseUnaryViewImpl<ViewOp, MatrixType,typename internal::traits<MatrixType>::StorageKind>::Base Base;
64  EIGEN_GENERIC_PUBLIC_INTERFACE(CwiseUnaryView)
65  typedef typename internal::remove_all<MatrixType>::type NestedExpression;
66 
67  explicit 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_STRONG_INLINE Index rows() const { return m_matrix.rows(); }
73  EIGEN_STRONG_INLINE Index cols() const { return m_matrix.cols(); }
74 
76  const ViewOp& functor() const { return m_functor; }
77 
79  const typename internal::remove_all<typename MatrixType::Nested>::type&
80  nestedExpression() const { return m_matrix; }
81 
83  typename internal::remove_all<typename MatrixType::Nested>::type&
84  nestedExpression() { return m_matrix.const_cast_derived(); }
85 
86  protected:
87  typename internal::ref_selector<MatrixType>::type m_matrix;
88  ViewOp m_functor;
89 };
90 
91 // Generic API dispatcher
92 template<typename ViewOp, typename XprType, typename StorageKind>
93 class CwiseUnaryViewImpl
94  : public internal::generic_xpr_base<CwiseUnaryView<ViewOp, XprType> >::type
95 {
96 public:
97  typedef typename internal::generic_xpr_base<CwiseUnaryView<ViewOp, XprType> >::type Base;
98 };
99 
100 template<typename ViewOp, typename MatrixType>
101 class CwiseUnaryViewImpl<ViewOp,MatrixType,Dense>
102  : public internal::dense_xpr_base< CwiseUnaryView<ViewOp, MatrixType> >::type
103 {
104  public:
105 
106  typedef CwiseUnaryView<ViewOp, MatrixType> Derived;
107  typedef typename internal::dense_xpr_base< CwiseUnaryView<ViewOp, MatrixType> >::type Base;
108 
109  EIGEN_DENSE_PUBLIC_INTERFACE(Derived)
110  EIGEN_INHERIT_ASSIGNMENT_OPERATORS(CwiseUnaryViewImpl)
111 
112  EIGEN_DEVICE_FUNC inline Scalar* data() { return &(this->coeffRef(0)); }
113  EIGEN_DEVICE_FUNC inline const Scalar* data() const { return &(this->coeff(0)); }
114 
115  EIGEN_DEVICE_FUNC inline Index innerStride() const
116  {
117  return derived().nestedExpression().innerStride() * sizeof(typename internal::traits<MatrixType>::Scalar) / sizeof(Scalar);
118  }
119 
120  EIGEN_DEVICE_FUNC inline Index outerStride() const
121  {
122  return derived().nestedExpression().outerStride() * sizeof(typename internal::traits<MatrixType>::Scalar) / sizeof(Scalar);
123  }
124 };
125 
126 } // end namespace Eigen
127 
128 #endif // EIGEN_CWISE_UNARY_VIEW_H
const internal::remove_all< typename MatrixType::Nested >::type & nestedExpression() const
Definition: CwiseUnaryView.h:80
const unsigned int DirectAccessBit
Definition: Constants.h:149
const unsigned int LvalueBit
Definition: Constants.h:138
Definition: LDLT.h:16
const ViewOp & functor() const
Definition: CwiseUnaryView.h:76
const unsigned int RowMajorBit
Definition: Constants.h:61
Generic lvalue expression of a coefficient-wise unary operator of a matrix or a vector.
Definition: CwiseUnaryView.h:59
Definition: Eigen_Colamd.h:54
internal::remove_all< typename MatrixType::Nested >::type & nestedExpression()
Definition: CwiseUnaryView.h:84