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tvmet/xpr/Literal.h@25:143b19c1fb05, 2012-10-17 (annotated)

Committer:
narshu
Date:
Wed Oct 17 22:22:28 2012 +0000
Revision:
25:143b19c1fb05
Commit before publishing;

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narshu 25:143b19c1fb05 1 /*
narshu 25:143b19c1fb05 2 * Tiny Vector Matrix Library
narshu 25:143b19c1fb05 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
narshu 25:143b19c1fb05 4 *
narshu 25:143b19c1fb05 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
narshu 25:143b19c1fb05 6 *
narshu 25:143b19c1fb05 7 * This library is free software; you can redistribute it and/or
narshu 25:143b19c1fb05 8 * modify it under the terms of the GNU Lesser General Public
narshu 25:143b19c1fb05 9 * License as published by the Free Software Foundation; either
narshu 25:143b19c1fb05 10 * version 2.1 of the License, or (at your option) any later version.
narshu 25:143b19c1fb05 11 *
narshu 25:143b19c1fb05 12 * This library is distributed in the hope that it will be useful,
narshu 25:143b19c1fb05 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
narshu 25:143b19c1fb05 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
narshu 25:143b19c1fb05 15 * Lesser General Public License for more details.
narshu 25:143b19c1fb05 16 *
narshu 25:143b19c1fb05 17 * You should have received a copy of the GNU Lesser General Public
narshu 25:143b19c1fb05 18 * License along with this library; if not, write to the Free Software
narshu 25:143b19c1fb05 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
narshu 25:143b19c1fb05 20 *
narshu 25:143b19c1fb05 21 * $Id: Literal.h,v 1.13 2007-06-23 15:58:59 opetzold Exp $
narshu 25:143b19c1fb05 22 */
narshu 25:143b19c1fb05 23
narshu 25:143b19c1fb05 24 #ifndef TVMET_XPR_LITERAL_H
narshu 25:143b19c1fb05 25 #define TVMET_XPR_LITERAL_H
narshu 25:143b19c1fb05 26
narshu 25:143b19c1fb05 27 namespace tvmet {
narshu 25:143b19c1fb05 28
narshu 25:143b19c1fb05 29
narshu 25:143b19c1fb05 30 /**
narshu 25:143b19c1fb05 31 * \class XprLiteral Literal.h "tvmet/xpr/Literal.h"
narshu 25:143b19c1fb05 32 * \brief Specify literals like scalars into the expression.
narshu 25:143b19c1fb05 33 * This expression is used for vectors and matrices - the
narshu 25:143b19c1fb05 34 * decision is done by the access operator.
narshu 25:143b19c1fb05 35 */
narshu 25:143b19c1fb05 36 template<class T>
narshu 25:143b19c1fb05 37 class XprLiteral
narshu 25:143b19c1fb05 38 : public TvmetBase< XprLiteral<T> >
narshu 25:143b19c1fb05 39 {
narshu 25:143b19c1fb05 40 XprLiteral();
narshu 25:143b19c1fb05 41 XprLiteral& operator=(const XprLiteral&);
narshu 25:143b19c1fb05 42
narshu 25:143b19c1fb05 43 public:
narshu 25:143b19c1fb05 44 typedef T value_type;
narshu 25:143b19c1fb05 45
narshu 25:143b19c1fb05 46 public:
narshu 25:143b19c1fb05 47 /** Complexity counter. */
narshu 25:143b19c1fb05 48 enum {
narshu 25:143b19c1fb05 49 ops = 1
narshu 25:143b19c1fb05 50 };
narshu 25:143b19c1fb05 51
narshu 25:143b19c1fb05 52 public:
narshu 25:143b19c1fb05 53 /** Constructor by value for literals . */
narshu 25:143b19c1fb05 54 explicit XprLiteral(value_type value)
narshu 25:143b19c1fb05 55 : m_data(value)
narshu 25:143b19c1fb05 56 { }
narshu 25:143b19c1fb05 57
narshu 25:143b19c1fb05 58 /** Copy Constructor. Not explicit! */
narshu 25:143b19c1fb05 59 #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
narshu 25:143b19c1fb05 60 XprLiteral(const XprLiteral& e)
narshu 25:143b19c1fb05 61 : m_data(e.m_data)
narshu 25:143b19c1fb05 62 { }
narshu 25:143b19c1fb05 63 #endif
narshu 25:143b19c1fb05 64
narshu 25:143b19c1fb05 65 /** Index operator, gives the value for vectors. */
narshu 25:143b19c1fb05 66 value_type operator()(std::size_t) const { return m_data; }
narshu 25:143b19c1fb05 67
narshu 25:143b19c1fb05 68 /** Index operator for arrays/matrices. */
narshu 25:143b19c1fb05 69 value_type operator()(std::size_t, std::size_t) const { return m_data; }
narshu 25:143b19c1fb05 70
narshu 25:143b19c1fb05 71 public: // debugging Xpr parse tree
narshu 25:143b19c1fb05 72 void print_xpr(std::ostream& os, std::size_t l=0) const {
narshu 25:143b19c1fb05 73 os << IndentLevel(l++) << "XprLiteral[O=" << ops << "]<T="
narshu 25:143b19c1fb05 74 << typeid(value_type).name()
narshu 25:143b19c1fb05 75 << ">," << std::endl;
narshu 25:143b19c1fb05 76 }
narshu 25:143b19c1fb05 77
narshu 25:143b19c1fb05 78 private:
narshu 25:143b19c1fb05 79 const value_type m_data;
narshu 25:143b19c1fb05 80 };
narshu 25:143b19c1fb05 81
narshu 25:143b19c1fb05 82
narshu 25:143b19c1fb05 83 } // namespace tvmet
narshu 25:143b19c1fb05 84
narshu 25:143b19c1fb05 85 #endif // TVMET_XPR_LITERAL_H
narshu 25:143b19c1fb05 86
narshu 25:143b19c1fb05 87 // Local Variables:
narshu 25:143b19c1fb05 88 // mode:C++
narshu 25:143b19c1fb05 89 // tab-width:8
narshu 25:143b19c1fb05 90 // End: