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85 lines
2.9 KiB
C++
85 lines
2.9 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) 2008-2009 Gael Guennebaud <g.gael@free.fr>
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// Copyright (C) 2006-2008 Benoit Jacob <jacob.benoit.1@gmail.com>
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//
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// Eigen is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 3 of the License, or (at your option) any later version.
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//
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// Alternatively, you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
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// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License and a copy of the GNU General Public License along with
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// Eigen. If not, see <http://www.gnu.org/licenses/>.
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#ifndef EIGEN_SPARSENESTBYVALUE_H
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#define EIGEN_SPARSENESTBYVALUE_H
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/** \class SparseNestByValue
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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 SparseMatrixBase::nestByValue(), class NestByValue
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*/
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template<typename ExpressionType>
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struct ei_traits<SparseNestByValue<ExpressionType> > : public ei_traits<ExpressionType>
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{};
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template<typename ExpressionType> class SparseNestByValue
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: public SparseMatrixBase<SparseNestByValue<ExpressionType> >
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{
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public:
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typedef typename ExpressionType::InnerIterator InnerIterator;
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EIGEN_SPARSE_GENERIC_PUBLIC_INTERFACE(SparseNestByValue)
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inline SparseNestByValue(const ExpressionType& matrix) : m_expression(matrix) {}
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EIGEN_STRONG_INLINE int rows() const { return m_expression.rows(); }
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EIGEN_STRONG_INLINE int cols() const { return m_expression.cols(); }
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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 SparseNestByValue<Derived>
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SparseMatrixBase<Derived>::nestByValue() const
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{
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return SparseNestByValue<Derived>(derived());
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}
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// template<typename MatrixType>
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// class SparseNestByValue<MatrixType>::InnerIterator : public MatrixType::InnerIterator
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// {
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// typedef typename MatrixType::InnerIterator Base;
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// public:
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//
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// EIGEN_STRONG_INLINE InnerIterator(const SparseNestByValue& expr, int outer)
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// : Base(expr.m_expression, outer)
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// {}
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// };
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#endif // EIGEN_SPARSENESTBYVALUE_H
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