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6d749c172a
The size_t type means a number of _bytes_, and it was misused as counting e.g. the number of rows/columns in a matrix. Moreover, it is unsigned, which can give strange bugs if a signed/unsigned mismatch occurs.
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()(int 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()(int i, int 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, int 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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