Eigen  3.4.90 (git rev a4098ac676528a83cfb73d4d26ce1b42ec05f47c)
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#include "./InternalHeaderCheck.h"
15
16namespace Eigen {
17
18namespace internal {
19template<typename ExpressionType>
20struct traits<NestByValue<ExpressionType> > : public traits<ExpressionType>
21{
22 enum {
23 Flags = traits<ExpressionType>::Flags & ~NestByRefBit
24 };
25};
26}
27
40template<typename ExpressionType> class NestByValue
41 : public internal::dense_xpr_base< NestByValue<ExpressionType> >::type
42{
43 public:
44
45 typedef typename internal::dense_xpr_base<NestByValue>::type Base;
46 EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue)
47
48 EIGEN_DEVICE_FUNC explicit inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {}
49
50 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index rows() const EIGEN_NOEXCEPT { return m_expression.rows(); }
51 EIGEN_DEVICE_FUNC EIGEN_CONSTEXPR inline Index cols() const EIGEN_NOEXCEPT { return m_expression.cols(); }
52
53 EIGEN_DEVICE_FUNC operator const ExpressionType&() const { return m_expression; }
54
55 EIGEN_DEVICE_FUNC const ExpressionType& nestedExpression() const { return m_expression; }
56
57 protected:
58 const ExpressionType m_expression;
59};
60
63template<typename Derived>
64EIGEN_DEVICE_FUNC inline const NestByValue<Derived>
66{
67 return NestByValue<Derived>(derived());
68}
69
70namespace internal {
71
72// Evaluator of Solve -> eval into a temporary
73template<typename ArgType>
74struct evaluator<NestByValue<ArgType> >
75 : public evaluator<ArgType>
76{
77 typedef evaluator<ArgType> Base;
78
79 EIGEN_DEVICE_FUNC explicit evaluator(const NestByValue<ArgType>& xpr)
80 : Base(xpr.nestedExpression())
81 {}
82};
83}
84
85} // end namespace Eigen
86
87#endif // EIGEN_NESTBYVALUE_H
const NestByValue< Derived > nestByValue() const
Definition: NestByValue.h:65
Expression which must be nested by value.
Definition: NestByValue.h:42
Namespace containing all symbols from the Eigen library.
Definition: B01_Experimental.dox:1
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:59