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68 lines
2.4 KiB
C
68 lines
2.4 KiB
C
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// 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) 2008 Gael Guennebaud <g.gael@free.fr>
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// Copyright (C) 2006-2008 Benoit Jacob <jacob@math.jussieu.fr>
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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_COMMA_INITIALIZER_H
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#define EIGEN_COMMA_INITIALIZER_H
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template<typename Scalar, typename Derived>
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struct MatrixBase<Scalar, Derived>::CommaInitializer
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{
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CommaInitializer(Derived& mat) : m_matrix(mat), m_count(1) {}
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CommaInitializer& operator,(const Scalar& s) {
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assert(m_count<m_matrix.size() && "Too many coefficients passed to Matrix::operator<<");
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m_matrix._coeffRef(m_count/m_matrix.cols(), m_count%m_matrix.cols()) = s;
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m_count++;
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return *this;
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}
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~CommaInitializer(void)
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{
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assert(m_count==m_matrix.size() && "Too few coefficients passed to Matrix::operator<<");
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}
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Derived& m_matrix;
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int m_count;
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};
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/** Convenient operator to set the coefficients of a matrix.
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*
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* The coefficients must be provided in a row major order and exactly match
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* the size of the matrix. Otherwise an assertion is raised.
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*
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* Example: \include MatrixBase_set.cpp
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* Output: \verbinclude MatrixBase_set.out
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*/
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template<typename Scalar, typename Derived>
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typename MatrixBase<Scalar, Derived>::CommaInitializer MatrixBase<Scalar, Derived>::operator<< (const Scalar& s)
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{
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coeffRef(0,0) = s;
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return CommaInitializer(*static_cast<Derived *>(this));
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}
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#endif // EIGEN_COMMA_INITIALIZER_H
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