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/*
* Tiny Vector Matrix Library
* Dense Vector Matrix Libary of Tiny size using Expression Templates
*
* Copyright (C) 2001 - 2003 Olaf Petzold <opetzold@users.sourceforge.net>
*
* This library 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 2.1 of the License, or (at your option) any later version.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: Literal.h,v 1.9 2003/11/30 18:35:17 opetzold Exp $
*/
#ifndef TVMET_XPR_LITERAL_H
#define TVMET_XPR_LITERAL_H
namespace tvmet {
/**
* \class XprLiteral Literal.h "tvmet/xpr/Literal.h"
* \brief Specify literals like scalars into the expression.
* This expression is used for vectors and matrices - the
* decision is done by the access operator.
*/
template<class T>
class XprLiteral
: public TvmetBase< XprLiteral<T> >
{
XprLiteral();
XprLiteral& operator=(const XprLiteral&);
public:
typedef T value_type;
public:
/** Complexity counter. */
enum {
ops = 1
};
public:
/** Constructor by value for literals . */
explicit XprLiteral(value_type value)
: m_data(value)
{ }
/** Copy Constructor. Not explicit! */
#if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
XprLiteral(const XprLiteral& e)
: m_data(e.m_data)
{ }
#endif
/** Index operator, gives the value for vectors. */
value_type operator()(int) const { return m_data; }
/** Index operator for arrays/matrices. */
value_type operator()(int, int) const { return m_data; }
public: // debugging Xpr parse tree
void print_xpr(std::ostream& os, int l=0) const {
os << IndentLevel(l++) << "XprLiteral[O=" << ops << "]<T="
<< typeid(value_type).name()
<< ">," << std::endl;
}
private:
const value_type m_data;
};
} // namespace tvmet
#endif // TVMET_XPR_LITERAL_H
// Local Variables:
// mode:C++
// End:
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