1// This file is part of Eigen, a lightweight C++ template library
2// for linear algebra.
3//
4// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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_LAZY_H
11#define EIGEN_LAZY_H
12
13namespace Eigen {
14
15/** \deprecated it is only used by lazy() which is deprecated
16  *
17  * \returns an expression of *this with added flags
18  *
19  * Example: \include MatrixBase_marked.cpp
20  * Output: \verbinclude MatrixBase_marked.out
21  *
22  * \sa class Flagged, extract(), part()
23  */
24template<typename Derived>
25template<unsigned int Added>
26inline const Flagged<Derived, Added, 0>
27MatrixBase<Derived>::marked() const
28{
29  return derived();
30}
31
32/** \deprecated use MatrixBase::noalias()
33  *
34  * \returns an expression of *this with the EvalBeforeAssigningBit flag removed.
35  *
36  * Example: \include MatrixBase_lazy.cpp
37  * Output: \verbinclude MatrixBase_lazy.out
38  *
39  * \sa class Flagged, marked()
40  */
41template<typename Derived>
42inline const Flagged<Derived, 0, EvalBeforeAssigningBit>
43MatrixBase<Derived>::lazy() const
44{
45  return derived();
46}
47
48
49/** \internal
50  * Overloaded to perform an efficient C += (A*B).lazy() */
51template<typename Derived>
52template<typename ProductDerived, typename Lhs, typename Rhs>
53Derived& MatrixBase<Derived>::operator+=(const Flagged<ProductBase<ProductDerived, Lhs,Rhs>, 0,
54                                                       EvalBeforeAssigningBit>& other)
55{
56  other._expression().derived().addTo(derived()); return derived();
57}
58
59/** \internal
60  * Overloaded to perform an efficient C -= (A*B).lazy() */
61template<typename Derived>
62template<typename ProductDerived, typename Lhs, typename Rhs>
63Derived& MatrixBase<Derived>::operator-=(const Flagged<ProductBase<ProductDerived, Lhs,Rhs>, 0,
64                                                       EvalBeforeAssigningBit>& other)
65{
66  other._expression().derived().subTo(derived()); return derived();
67}
68
69} // end namespace Eigen
70
71#endif // EIGEN_LAZY_H
72