112 lines
3.1 KiB
C++
112 lines
3.1 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra.
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//
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// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
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// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// This Source Code Form is subject to the terms of the Mozilla
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// Public License v. 2.0. If a copy of the MPL was not distributed
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// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
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#ifndef EIGEN_NESTBYVALUE_H
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#define EIGEN_NESTBYVALUE_H
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namespace Eigen {
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/** \class NestByValue
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* \ingroup Core_Module
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*
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* \brief Expression which must be nested by value
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*
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* \param ExpressionType the type of the object of which we are requiring nesting-by-value
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*
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* This class is the return type of MatrixBase::nestByValue()
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* and most of the time this is the only way it is used.
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*
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* \sa MatrixBase::nestByValue()
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*/
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namespace internal {
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template<typename ExpressionType>
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struct traits<NestByValue<ExpressionType> > : public traits<ExpressionType>
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{};
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}
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template<typename ExpressionType> class NestByValue
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: public internal::dense_xpr_base< NestByValue<ExpressionType> >::type
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{
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public:
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typedef typename internal::dense_xpr_base<NestByValue>::type Base;
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EIGEN_DENSE_PUBLIC_INTERFACE(NestByValue)
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inline NestByValue(const ExpressionType& matrix) : m_expression(matrix) {}
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inline Index rows() const { return m_expression.rows(); }
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inline Index cols() const { return m_expression.cols(); }
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inline Index outerStride() const { return m_expression.outerStride(); }
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inline Index innerStride() const { return m_expression.innerStride(); }
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inline const CoeffReturnType coeff(Index row, Index col) const
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{
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return m_expression.coeff(row, col);
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}
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inline Scalar& coeffRef(Index row, Index col)
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{
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return m_expression.const_cast_derived().coeffRef(row, col);
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}
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inline const CoeffReturnType coeff(Index index) const
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{
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return m_expression.coeff(index);
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}
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inline Scalar& coeffRef(Index index)
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{
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return m_expression.const_cast_derived().coeffRef(index);
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}
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template<int LoadMode>
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inline const PacketScalar packet(Index row, Index col) const
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{
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return m_expression.template packet<LoadMode>(row, col);
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}
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template<int LoadMode>
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inline void writePacket(Index row, Index col, const PacketScalar& x)
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{
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m_expression.const_cast_derived().template writePacket<LoadMode>(row, col, x);
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}
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template<int LoadMode>
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inline const PacketScalar packet(Index index) const
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{
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return m_expression.template packet<LoadMode>(index);
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}
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template<int LoadMode>
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inline void writePacket(Index index, const PacketScalar& x)
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{
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m_expression.const_cast_derived().template writePacket<LoadMode>(index, x);
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}
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operator const ExpressionType&() const { return m_expression; }
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protected:
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const ExpressionType m_expression;
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};
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/** \returns an expression of the temporary version of *this.
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*/
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template<typename Derived>
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inline const NestByValue<Derived>
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DenseBase<Derived>::nestByValue() const
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{
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return NestByValue<Derived>(derived());
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}
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} // end namespace Eigen
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#endif // EIGEN_NESTBYVALUE_H
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