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Diff: tvmet/xpr/Literal.h
- Revision:
- 15:9c5aaeda36dc
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/tvmet/xpr/Literal.h Sat Apr 06 20:57:54 2013 +0000 @@ -0,0 +1,90 @@ +/* + * Tiny Vector Matrix Library + * Dense Vector Matrix Libary of Tiny size using Expression Templates + * + * Copyright (C) 2001 - 2007 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 1.13 2007-06-23 15:58:59 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()(std::size_t) const { return m_data; } + + /** Index operator for arrays/matrices. */ + value_type operator()(std::size_t, std::size_t) const { return m_data; } + +public: // debugging Xpr parse tree + void print_xpr(std::ostream& os, std::size_t 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++ +// tab-width:8 +// End: