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dad245af56
with minimal code duplication. There now are only two (2) const_cast remaining in the whole source code. - eigen2 now fully allows copying a row-vector into a column-vector. added a unit-test for that. - split unit tests, improve docs, various improvements.
120 lines
3.7 KiB
C++
120 lines
3.7 KiB
C++
// This file is part of Eigen, a lightweight C++ template library
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// for linear algebra. Eigen itself is part of the KDE project.
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//
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// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr>
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//
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// Eigen is free software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the Free Software
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// Foundation; either version 2 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 General Public License for more
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// details.
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//
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// You should have received a copy of the GNU General Public License along
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// with Eigen; if not, write to the Free Software Foundation, Inc., 51
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// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// As a special exception, if other files instantiate templates or use macros
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// or functions from this file, or you compile this file and link it
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// with other works to produce a work based on this file, this file does not
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// by itself cause the resulting work to be covered by the GNU General Public
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// License. This exception does not invalidate any other reasons why a work
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// based on this file might be covered by the GNU General Public License.
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#ifndef EIGEN_ROW_H
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#define EIGEN_ROW_H
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/** \class Row
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*
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* \brief Expression of a row
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*
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* \param MatrixType the type of the object in which we are taking a row
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*
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* This class represents an expression of a row. It is the return
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* type of MatrixBase::row() and most of the time this is the only way it
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* is used.
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*
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* However, if you want to directly maniputate row expressions,
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* for instance if you want to write a function returning such an expression, you
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* will need to use this class.
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*
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* Here is an example illustrating this:
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* \include class_Row.cpp
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* Output: \verbinclude class_Row.out
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*
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* \sa MatrixBase::row()
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*/
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template<typename MatrixType> class Row
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: public MatrixBase<typename MatrixType::Scalar, Row<MatrixType> >
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{
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public:
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typedef typename MatrixType::Scalar Scalar;
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typedef typename MatrixType::Ref MatRef;
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friend class MatrixBase<Scalar, Row<MatrixType> >;
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Row(const MatRef& matrix, int row)
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: m_matrix(matrix), m_row(row)
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{
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assert(row >= 0 && row < matrix.rows());
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}
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Row(const Row& other)
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: m_matrix(other.m_matrix), m_row(other.m_row) {}
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template<typename OtherDerived>
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Row& operator=(const MatrixBase<Scalar, OtherDerived>& other)
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{
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return MatrixBase<Scalar, Row<MatrixType> >::operator=(other);
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}
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EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Row)
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private:
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static const int _RowsAtCompileTime = 1,
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_ColsAtCompileTime = MatrixType::ColsAtCompileTime;
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const Row& _ref() const { return *this; }
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int _rows() const { return 1; }
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int _cols() const { return m_matrix.cols(); }
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Scalar& _coeffRef(int, int col)
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{
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return m_matrix.coeffRef(m_row, col);
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}
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Scalar _coeff(int, int col) const
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{
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return m_matrix.coeff(m_row, col);
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}
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protected:
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MatRef m_matrix;
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const int m_row;
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};
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/** \returns an expression of the \a i-th row of *this. Note that the numbering starts at 0.
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*
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* Example: \include MatrixBase_row.cpp
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* Output: \verbinclude MatrixBase_row.out
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*
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* \sa col(), class Row */
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template<typename Scalar, typename Derived>
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Row<Derived>
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MatrixBase<Scalar, Derived>::row(int i)
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{
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return Row<Derived>(ref(), i);
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}
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/** This is the const version of row(). */
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template<typename Scalar, typename Derived>
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const Row<Derived>
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MatrixBase<Scalar, Derived>::row(int i) const
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{
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return Row<Derived>(ref(), i);
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}
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#endif // EIGEN_ROW_H
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