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author | 2007-12-28 16:00:55 +0000 | |
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committer | 2007-12-28 16:00:55 +0000 | |
commit | dfdad129a3c6d5437eb001f5fe6d37de3fc07238 (patch) | |
tree | afbde1562e62b3952c8ce7a6b9c3cdd95fdb69c0 /Eigen/src/Core/Sum.h | |
parent | e7bdbe2e6a7d3d3e3f498e1ba9159b0ec1a8ccae (diff) |
move Core/ to a src/ subdir, in preparation for following changes
Diffstat (limited to 'Eigen/src/Core/Sum.h')
-rw-r--r-- | Eigen/src/Core/Sum.h | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/Eigen/src/Core/Sum.h b/Eigen/src/Core/Sum.h new file mode 100644 index 000000000..6385ced2c --- /dev/null +++ b/Eigen/src/Core/Sum.h @@ -0,0 +1,80 @@ +// This file is part of Eigen, a lightweight C++ template library +// for linear algebra. Eigen itself is part of the KDE project. +// +// Copyright (C) 2006-2007 Benoit Jacob <jacob@math.jussieu.fr> +// +// Eigen is free software; 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 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 General Public License for more +// details. +// +// You should have received a copy of the GNU General Public License along +// with Eigen; if not, write to the Free Software Foundation, Inc., 51 +// Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. +// +// As a special exception, if other files instantiate templates or use macros +// or functions from this file, or you compile this file and link it +// with other works to produce a work based on this file, this file does not +// by itself cause the resulting work to be covered by the GNU General Public +// License. This exception does not invalidate any other reasons why a work +// based on this file might be covered by the GNU General Public License. + +#ifndef EIGEN_SUM_H +#define EIGEN_SUM_H + +template<typename Lhs, typename Rhs> class Sum : NoOperatorEquals, + public MatrixBase<typename Lhs::Scalar, Sum<Lhs, Rhs> > +{ + public: + typedef typename Lhs::Scalar Scalar; + typedef typename Lhs::Ref LhsRef; + typedef typename Rhs::Ref RhsRef; + friend class MatrixBase<Scalar, Sum>; + + Sum(const LhsRef& lhs, const RhsRef& rhs) + : m_lhs(lhs), m_rhs(rhs) + { + assert(lhs.rows() == rhs.rows() && lhs.cols() == rhs.cols()); + } + + Sum(const Sum& other) : m_lhs(other.m_lhs), m_rhs(other.m_rhs) {} + + private: + static const int _RowsAtCompileTime = Lhs::RowsAtCompileTime, + _ColsAtCompileTime = Rhs::ColsAtCompileTime; + + const Sum& _ref() const { return *this; } + int _rows() const { return m_lhs.rows(); } + int _cols() const { return m_lhs.cols(); } + + Scalar _coeff(int row, int col) const + { + return m_lhs.coeff(row, col) + m_rhs.coeff(row, col); + } + + protected: + const LhsRef m_lhs; + const RhsRef m_rhs; +}; + +/** \relates MatrixBase */ +template<typename Scalar, typename Derived1, typename Derived2> +const Sum<Derived1, Derived2> +operator+(const MatrixBase<Scalar, Derived1> &mat1, const MatrixBase<Scalar, Derived2> &mat2) +{ + return Sum<Derived1, Derived2>(mat1.ref(), mat2.ref()); +} + +template<typename Scalar, typename Derived> +template<typename OtherDerived> +Derived & +MatrixBase<Scalar, Derived>::operator+=(const MatrixBase<Scalar, OtherDerived>& other) +{ + return *this = *this + other; +} + +#endif // EIGEN_SUM_H |