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-// This file is part of Eigen, a lightweight C++ template library
-// for linear algebra. Eigen itself is part of the KDE project.
-//
-// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
-//
-// 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_COLUMN_H
-#define EIGEN_COLUMN_H
-
-/** \class Column
- *
- * \brief Expression of a column
- *
- * \param MatrixType the type of the object in which we are taking a column
- *
- * This class represents an expression of a column. It is the return
- * type of MatrixBase::col() and most of the time this is the only way it
- * is used.
- *
- * However, if you want to directly maniputate column expressions,
- * for instance if you want to write a function returning such an expression, you
- * will need to use this class.
- *
- * Here is an example illustrating this:
- * \include class_Column.cpp
- * Output: \verbinclude class_Column.out
- *
- * \sa MatrixBase::col()
- */
-template<typename MatrixType>
-struct ei_traits<Column<MatrixType> >
-{
- typedef typename MatrixType::Scalar Scalar;
- enum {
- RowsAtCompileTime = MatrixType::RowsAtCompileTime,
- ColsAtCompileTime = 1,
- MaxRowsAtCompileTime = MatrixType::MaxRowsAtCompileTime,
- MaxColsAtCompileTime = 1
- };
-};
-
-template<typename MatrixType> class Column
- : public MatrixBase<Column<MatrixType> >
-{
- public:
-
- EIGEN_BASIC_PUBLIC_INTERFACE(Column)
-
- typedef typename MatrixType::AsArg MatRef;
-
- Column(const MatRef& matrix, int col)
- : m_matrix(matrix), m_col(col)
- {
- assert(col >= 0 && col < matrix.cols());
- }
-
- EIGEN_INHERIT_ASSIGNMENT_OPERATORS(Column)
-
- private:
-
- const Column& _asArg() const { return *this; }
- int _rows() const { return m_matrix.rows(); }
- int _cols() const { return 1; }
-
- Scalar& _coeffRef(int row, int)
- {
- return m_matrix.coeffRef(row, m_col);
- }
-
- Scalar _coeff(int row, int) const
- {
- return m_matrix.coeff(row, m_col);
- }
-
- protected:
- MatRef m_matrix;
- const int m_col;
-};
-
-/** \returns an expression of the \a i-th column of *this. Note that the numbering starts at 0.
- *
- * Example: \include MatrixBase_col.cpp
- * Output: \verbinclude MatrixBase_col.out
- *
- * \sa row(), class Column */
-template<typename Derived>
-Column<Derived>
-MatrixBase<Derived>::col(int i)
-{
- return Column<Derived>(asArg(), i);
-}
-
-/** This is the const version of col(). */
-template<typename Derived>
-const Column<Derived>
-MatrixBase<Derived>::col(int i) const
-{
- return Column<Derived>(asArg(), i);
-}
-
-#endif // EIGEN_COLUMN_H