| // This file is part of Eigen, a lightweight C++ template library |
| // for linear algebra. |
| // |
| // Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr> |
| // Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com> |
| // |
| // Eigen is free software; you can redistribute it and/or |
| // modify it under the terms of the GNU Lesser General Public |
| // License as published by the Free Software Foundation; either |
| // version 3 of the License, or (at your option) any later version. |
| // |
| // Alternatively, you can redistribute it and/or |
| // modify it under the terms of the GNU General Public License as |
| // published by the Free Software Foundation; either version 2 of |
| // the License, or (at your option) any later version. |
| // |
| // Eigen is distributed in the hope that it will be useful, but WITHOUT ANY |
| // WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
| // FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the |
| // GNU General Public License for more details. |
| // |
| // You should have received a copy of the GNU Lesser General Public |
| // License and a copy of the GNU General Public License along with |
| // Eigen. If not, see <http://www.gnu.org/licenses/>. |
| |
| #ifndef EIGEN_NESTBYVALUE_H |
| #define EIGEN_NESTBYVALUE_H |
| |
| /** \class NestByValue |
| * |
| * \brief Expression which must be nested by value |
| * |
| * \param ExpressionType the type of the object of which we are requiring nesting-by-value |
| * |
| * This class is the return type of MatrixBase::nestByValue() |
| * and most of the time this is the only way it is used. |
| * |
| * \sa MatrixBase::nestByValue() |
| */ |
| template<typename ExpressionType> |
| struct ei_traits<NestByValue<ExpressionType> > : public ei_traits<ExpressionType> |
| {}; |
| |
| template<typename ExpressionType> class NestByValue |
| : public ei_dense_xpr_base< NestByValue<ExpressionType> >::type |
| { |
| public: |
| |
| typedef typename ei_dense_xpr_base<NestByValue>::type Base; |
| EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue) |
| |
| inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {} |
| |
| inline Index rows() const { return m_expression.rows(); } |
| inline Index cols() const { return m_expression.cols(); } |
| inline Index outerStride() const { return m_expression.outerStride(); } |
| inline Index innerStride() const { return m_expression.innerStride(); } |
| |
| inline const CoeffReturnType coeff(Index row, Index col) const |
| { |
| return m_expression.coeff(row, col); |
| } |
| |
| inline Scalar& coeffRef(Index row, Index col) |
| { |
| return m_expression.const_cast_derived().coeffRef(row, col); |
| } |
| |
| inline const CoeffReturnType coeff(Index index) const |
| { |
| return m_expression.coeff(index); |
| } |
| |
| inline Scalar& coeffRef(Index index) |
| { |
| return m_expression.const_cast_derived().coeffRef(index); |
| } |
| |
| template<int LoadMode> |
| inline const PacketScalar packet(Index row, Index col) const |
| { |
| return m_expression.template packet<LoadMode>(row, col); |
| } |
| |
| template<int LoadMode> |
| inline void writePacket(Index row, Index col, const PacketScalar& x) |
| { |
| m_expression.const_cast_derived().template writePacket<LoadMode>(row, col, x); |
| } |
| |
| template<int LoadMode> |
| inline const PacketScalar packet(Index index) const |
| { |
| return m_expression.template packet<LoadMode>(index); |
| } |
| |
| template<int LoadMode> |
| inline void writePacket(Index index, const PacketScalar& x) |
| { |
| m_expression.const_cast_derived().template writePacket<LoadMode>(index, x); |
| } |
| |
| operator const ExpressionType&() const { return m_expression; } |
| |
| protected: |
| const ExpressionType m_expression; |
| }; |
| |
| /** \returns an expression of the temporary version of *this. |
| */ |
| template<typename Derived> |
| inline const NestByValue<Derived> |
| DenseBase<Derived>::nestByValue() const |
| { |
| return NestByValue<Derived>(derived()); |
| } |
| |
| #endif // EIGEN_NESTBYVALUE_H |