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Eurobot2012_Primary

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tvmet/xpr/Null.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: Null.h,v 1.11 2007-06-23 15:59:00 opetzold Exp $
narshu 25:143b19c1fb05 22 */
narshu 25:143b19c1fb05 23
narshu 25:143b19c1fb05 24 #ifndef TVMET_XPR_NULL_H
narshu 25:143b19c1fb05 25 #define TVMET_XPR_NULL_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 XprNull Null.h "tvmet/xpr/Null.h"
narshu 25:143b19c1fb05 32 * \brief Null object design pattern
narshu 25:143b19c1fb05 33 */
narshu 25:143b19c1fb05 34 class XprNull
narshu 25:143b19c1fb05 35 : public TvmetBase< XprNull >
narshu 25:143b19c1fb05 36 {
narshu 25:143b19c1fb05 37 XprNull& operator=(const XprNull&);
narshu 25:143b19c1fb05 38
narshu 25:143b19c1fb05 39 public:
narshu 25:143b19c1fb05 40 explicit XprNull() { }
narshu 25:143b19c1fb05 41
narshu 25:143b19c1fb05 42 public: // debugging Xpr parse tree
narshu 25:143b19c1fb05 43 void print_xpr(std::ostream& os, std::size_t l=0) const {
narshu 25:143b19c1fb05 44 os << IndentLevel(l) << "XprNull[O=0]" << std::endl;
narshu 25:143b19c1fb05 45 }
narshu 25:143b19c1fb05 46 };
narshu 25:143b19c1fb05 47
narshu 25:143b19c1fb05 48
narshu 25:143b19c1fb05 49 #define TVMET_BINARY_OPERATOR(OP) \
narshu 25:143b19c1fb05 50 template< class T > \
narshu 25:143b19c1fb05 51 inline \
narshu 25:143b19c1fb05 52 T operator OP (const T& lhs, XprNull) { return lhs; }
narshu 25:143b19c1fb05 53
narshu 25:143b19c1fb05 54 TVMET_BINARY_OPERATOR(+)
narshu 25:143b19c1fb05 55 TVMET_BINARY_OPERATOR(-)
narshu 25:143b19c1fb05 56 TVMET_BINARY_OPERATOR(*)
narshu 25:143b19c1fb05 57 TVMET_BINARY_OPERATOR(/)
narshu 25:143b19c1fb05 58
narshu 25:143b19c1fb05 59 #undef TVMET_BINARY_OPERATOR
narshu 25:143b19c1fb05 60
narshu 25:143b19c1fb05 61
narshu 25:143b19c1fb05 62 } // namespace tvmet
narshu 25:143b19c1fb05 63
narshu 25:143b19c1fb05 64 #endif // TVMET_XPR_NULL_H
narshu 25:143b19c1fb05 65
narshu 25:143b19c1fb05 66 // Local Variables:
narshu 25:143b19c1fb05 67 // mode:C++
narshu 25:143b19c1fb05 68 // tab-width:8
narshu 25:143b19c1fb05 69 // End: