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Eigen  3.4.99 (git rev 199c5f2b47eb1f8e5a2d20e60f07e97cd95a6ba6)
NestByValue.h
1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
5 // Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
6 //
7 // This Source Code Form is subject to the terms of the Mozilla
8 // Public License v. 2.0. If a copy of the MPL was not distributed
9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
10 
11 #ifndef EIGEN_NESTBYVALUE_H
12 #define EIGEN_NESTBYVALUE_H
13 
14 namespace Eigen {
15 
16 namespace internal {
17 template<typename ExpressionType>
18 struct traits<NestByValue<ExpressionType> > : public traits<ExpressionType>
19 {
20  enum {
21  Flags = traits<ExpressionType>::Flags & ~NestByRefBit
22  };
23 };
24 }
25 
38 template<typename ExpressionType> class NestByValue
39  : public internal::dense_xpr_base< NestByValue<ExpressionType> >::type
40 {
41  public:
42 
43  typedef typename internal::dense_xpr_base<NestByValue>::type Base;
44  EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue)
45 
46  EIGEN_DEVICE_FUNC explicit inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {}
47 
48  EIGEN_DEVICE_FUNC inline Index rows() const { return m_expression.rows(); }
49  EIGEN_DEVICE_FUNC inline Index cols() const { return m_expression.cols(); }
50 
51  EIGEN_DEVICE_FUNC operator const ExpressionType&() const { return m_expression; }
52 
53  EIGEN_DEVICE_FUNC const ExpressionType& nestedExpression() const { return m_expression; }
54 
55  protected:
56  const ExpressionType m_expression;
57 };
58 
61 template<typename Derived>
62 EIGEN_DEVICE_FUNC inline const NestByValue<Derived>
64 {
65  return NestByValue<Derived>(derived());
66 }
67 
68 namespace internal {
69 
70 // Evaluator of Solve -> eval into a temporary
71 template<typename ArgType>
72 struct evaluator<NestByValue<ArgType> >
73  : public evaluator<ArgType>
74 {
75  typedef evaluator<ArgType> Base;
76 
77  EIGEN_DEVICE_FUNC explicit evaluator(const NestByValue<ArgType>& xpr)
78  : Base(xpr.nestedExpression())
79  {}
80 };
81 }
82 
83 } // end namespace Eigen
84 
85 #endif // EIGEN_NESTBYVALUE_H
const NestByValue< Derived > nestByValue() const
Definition: NestByValue.h:63
Expression which must be nested by value.
Definition: NestByValue.h:40
Namespace containing all symbols from the Eigen library.
Definition: Core:134
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:74