Yoji KURODA / Eigen

Eigne Matrix Class Library

Dependents:   Eigen_test Odometry_test AttitudeEstimation_usingTicker MPU9250_Quaternion_Binary_Serial ... more

Eigen Matrix Class Library for mbed.

Finally, you can use Eigen on your mbed!!!

src/Core/ReturnByValue.h@0:13a5d365ba16, 2016-10-13 (annotated)

Committer:
ykuroda
Date:
Thu Oct 13 04:07:23 2016 +0000
Revision:
0:13a5d365ba16
First commint, Eigne Matrix Class Library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ykuroda 0:13a5d365ba16 1 // This file is part of Eigen, a lightweight C++ template library
ykuroda 0:13a5d365ba16 2 // for linear algebra.
ykuroda 0:13a5d365ba16 3 //
ykuroda 0:13a5d365ba16 4 // Copyright (C) 2009-2010 Gael Guennebaud <gael.guennebaud@inria.fr>
ykuroda 0:13a5d365ba16 5 // Copyright (C) 2009-2010 Benoit Jacob <jacob.benoit.1@gmail.com>
ykuroda 0:13a5d365ba16 6 //
ykuroda 0:13a5d365ba16 7 // This Source Code Form is subject to the terms of the Mozilla
ykuroda 0:13a5d365ba16 8 // Public License v. 2.0. If a copy of the MPL was not distributed
ykuroda 0:13a5d365ba16 9 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
ykuroda 0:13a5d365ba16 10
ykuroda 0:13a5d365ba16 11 #ifndef EIGEN_RETURNBYVALUE_H
ykuroda 0:13a5d365ba16 12 #define EIGEN_RETURNBYVALUE_H
ykuroda 0:13a5d365ba16 13
ykuroda 0:13a5d365ba16 14 namespace Eigen {
ykuroda 0:13a5d365ba16 15
ykuroda 0:13a5d365ba16 16 /** \class ReturnByValue
ykuroda 0:13a5d365ba16 17 * \ingroup Core_Module
ykuroda 0:13a5d365ba16 18 *
ykuroda 0:13a5d365ba16 19 */
ykuroda 0:13a5d365ba16 20
ykuroda 0:13a5d365ba16 21 namespace internal {
ykuroda 0:13a5d365ba16 22
ykuroda 0:13a5d365ba16 23 template<typename Derived>
ykuroda 0:13a5d365ba16 24 struct traits<ReturnByValue<Derived> >
ykuroda 0:13a5d365ba16 25 : public traits<typename traits<Derived>::ReturnType>
ykuroda 0:13a5d365ba16 26 {
ykuroda 0:13a5d365ba16 27 enum {
ykuroda 0:13a5d365ba16 28 // We're disabling the DirectAccess because e.g. the constructor of
ykuroda 0:13a5d365ba16 29 // the Block-with-DirectAccess expression requires to have a coeffRef method.
ykuroda 0:13a5d365ba16 30 // Also, we don't want to have to implement the stride stuff.
ykuroda 0:13a5d365ba16 31 Flags = (traits<typename traits<Derived>::ReturnType>::Flags
ykuroda 0:13a5d365ba16 32 | EvalBeforeNestingBit) & ~DirectAccessBit
ykuroda 0:13a5d365ba16 33 };
ykuroda 0:13a5d365ba16 34 };
ykuroda 0:13a5d365ba16 35
ykuroda 0:13a5d365ba16 36 /* The ReturnByValue object doesn't even have a coeff() method.
ykuroda 0:13a5d365ba16 37 * So the only way that nesting it in an expression can work, is by evaluating it into a plain matrix.
ykuroda 0:13a5d365ba16 38 * So internal::nested always gives the plain return matrix type.
ykuroda 0:13a5d365ba16 39 *
ykuroda 0:13a5d365ba16 40 * FIXME: I don't understand why we need this specialization: isn't this taken care of by the EvalBeforeNestingBit ??
ykuroda 0:13a5d365ba16 41 */
ykuroda 0:13a5d365ba16 42 template<typename Derived,int n,typename PlainObject>
ykuroda 0:13a5d365ba16 43 struct nested<ReturnByValue<Derived>, n, PlainObject>
ykuroda 0:13a5d365ba16 44 {
ykuroda 0:13a5d365ba16 45 typedef typename traits<Derived>::ReturnType type;
ykuroda 0:13a5d365ba16 46 };
ykuroda 0:13a5d365ba16 47
ykuroda 0:13a5d365ba16 48 } // end namespace internal
ykuroda 0:13a5d365ba16 49
ykuroda 0:13a5d365ba16 50 template<typename Derived> class ReturnByValue
ykuroda 0:13a5d365ba16 51 : internal::no_assignment_operator, public internal::dense_xpr_base< ReturnByValue<Derived> >::type
ykuroda 0:13a5d365ba16 52 {
ykuroda 0:13a5d365ba16 53 public:
ykuroda 0:13a5d365ba16 54 typedef typename internal::traits<Derived>::ReturnType ReturnType;
ykuroda 0:13a5d365ba16 55
ykuroda 0:13a5d365ba16 56 typedef typename internal::dense_xpr_base<ReturnByValue>::type Base;
ykuroda 0:13a5d365ba16 57 EIGEN_DENSE_PUBLIC_INTERFACE(ReturnByValue)
ykuroda 0:13a5d365ba16 58
ykuroda 0:13a5d365ba16 59 template<typename Dest>
ykuroda 0:13a5d365ba16 60 inline void evalTo(Dest& dst) const
ykuroda 0:13a5d365ba16 61 { static_cast<const Derived*>(this)->evalTo(dst); }
ykuroda 0:13a5d365ba16 62 inline Index rows() const { return static_cast<const Derived*>(this)->rows(); }
ykuroda 0:13a5d365ba16 63 inline Index cols() const { return static_cast<const Derived*>(this)->cols(); }
ykuroda 0:13a5d365ba16 64
ykuroda 0:13a5d365ba16 65 #ifndef EIGEN_PARSED_BY_DOXYGEN
ykuroda 0:13a5d365ba16 66 #define Unusable YOU_ARE_TRYING_TO_ACCESS_A_SINGLE_COEFFICIENT_IN_A_SPECIAL_EXPRESSION_WHERE_THAT_IS_NOT_ALLOWED_BECAUSE_THAT_WOULD_BE_INEFFICIENT
ykuroda 0:13a5d365ba16 67 class Unusable{
ykuroda 0:13a5d365ba16 68 Unusable(const Unusable&) {}
ykuroda 0:13a5d365ba16 69 Unusable& operator=(const Unusable&) {return *this;}
ykuroda 0:13a5d365ba16 70 };
ykuroda 0:13a5d365ba16 71 const Unusable& coeff(Index) const { return *reinterpret_cast<const Unusable*>(this); }
ykuroda 0:13a5d365ba16 72 const Unusable& coeff(Index,Index) const { return *reinterpret_cast<const Unusable*>(this); }
ykuroda 0:13a5d365ba16 73 Unusable& coeffRef(Index) { return *reinterpret_cast<Unusable*>(this); }
ykuroda 0:13a5d365ba16 74 Unusable& coeffRef(Index,Index) { return *reinterpret_cast<Unusable*>(this); }
ykuroda 0:13a5d365ba16 75 template<int LoadMode> Unusable& packet(Index) const;
ykuroda 0:13a5d365ba16 76 template<int LoadMode> Unusable& packet(Index, Index) const;
ykuroda 0:13a5d365ba16 77 #endif
ykuroda 0:13a5d365ba16 78 };
ykuroda 0:13a5d365ba16 79
ykuroda 0:13a5d365ba16 80 template<typename Derived>
ykuroda 0:13a5d365ba16 81 template<typename OtherDerived>
ykuroda 0:13a5d365ba16 82 Derived& DenseBase<Derived>::operator=(const ReturnByValue<OtherDerived>& other)
ykuroda 0:13a5d365ba16 83 {
ykuroda 0:13a5d365ba16 84 other.evalTo(derived());
ykuroda 0:13a5d365ba16 85 return derived();
ykuroda 0:13a5d365ba16 86 }
ykuroda 0:13a5d365ba16 87
ykuroda 0:13a5d365ba16 88 template<typename Derived>
ykuroda 0:13a5d365ba16 89 template<typename OtherDerived>
ykuroda 0:13a5d365ba16 90 Derived& DenseBase<Derived>::lazyAssign(const ReturnByValue<OtherDerived>& other)
ykuroda 0:13a5d365ba16 91 {
ykuroda 0:13a5d365ba16 92 other.evalTo(derived());
ykuroda 0:13a5d365ba16 93 return derived();
ykuroda 0:13a5d365ba16 94 }
ykuroda 0:13a5d365ba16 95
ykuroda 0:13a5d365ba16 96
ykuroda 0:13a5d365ba16 97 } // end namespace Eigen
ykuroda 0:13a5d365ba16 98
ykuroda 0:13a5d365ba16 99 #endif // EIGEN_RETURNBYVALUE_H