mirror of
https://gitlab.com/libeigen/eigen.git
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3036eeca0a
release of tvmet (inactive for 2 years and developer unreachable) as the basis for eigen2, because it provides seemingly good expression template mechanisms, we want that, and it would take years to reinvent that wheel. We'll see. So this commit imports the last tvmet release.
105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
/*
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* Tiny Vector Matrix Library
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* Dense Vector Matrix Libary of Tiny size using Expression Templates
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*
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* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
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*
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* This library 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 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser 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 along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Id: BinOperator.h,v 1.15 2004/09/16 09:14:18 opetzold Exp $
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*/
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#ifndef TVMET_XPR_BINOPERATOR_H
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#define TVMET_XPR_BINOPERATOR_H
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#include <tvmet/TypePromotion.h>
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namespace tvmet {
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/**
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* \class XprBinOp BinOperator.h "tvmet/xpr/BinOperator.h"
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* \brief Binary operators working on two sub expressions.
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*
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* On acessing using the index operator() the binary operation will be
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* evaluated at compile time.
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*/
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template<class BinOp, class E1, class E2>
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class XprBinOp
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: public TvmetBase< XprBinOp<BinOp, E1, E2> >
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{
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XprBinOp();
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XprBinOp& operator=(const XprBinOp&);
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public:
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typedef typename BinOp::value_type value_type;
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public:
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/** Complexity counter. */
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enum {
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ops_lhs = E1::ops,
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ops_rhs = E2::ops,
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ops = 2 * (ops_lhs + ops_rhs) // lhs op rhs
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};
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public:
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/** Constructor for two expressions. */
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explicit XprBinOp(const E1& lhs, const E2& rhs)
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: m_lhs(lhs), m_rhs(rhs)
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{ }
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/** Copy Constructor. Not explicit! */
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#if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
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XprBinOp(const XprBinOp& e)
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: m_lhs(e.m_lhs), m_rhs(e.m_rhs)
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{ }
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#endif
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/** Index operator, evaluates the expression inside. */
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value_type operator()(std::size_t i) const {
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return BinOp::apply_on(m_lhs(i), m_rhs(i));
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}
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/** Index operator for arrays/matrices */
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value_type operator()(std::size_t i, std::size_t j) const {
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return BinOp::apply_on(m_lhs(i, j), m_rhs(i, j));
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}
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public: // debugging Xpr parse tree
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void print_xpr(std::ostream& os, std::size_t l=0) const {
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os << IndentLevel(l++)
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<< "XprBinOp[O="<< ops << ", (O1=" << ops_lhs << ", O2=" << ops_rhs << ")]<"
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<< std::endl;
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BinOp::print_xpr(os, l);
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m_lhs.print_xpr(os, l);
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m_rhs.print_xpr(os, l);
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os << IndentLevel(--l)
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<< ">," << std::endl;
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}
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private:
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const E1 m_lhs;
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const E2 m_rhs;
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};
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} // namespace tvmet
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#endif // TVMET_XPR_BINOPERATOR_H
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// Local Variables:
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// mode:C++
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// End:
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