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Dependencies:   mbed mbed-rtos

tvmet/xpr/Null.h@9:08552997b544, 2012-11-14 (annotated)

Committer:
madcowswe
Date:
Wed Nov 14 17:15:53 2012 +0000
Revision:
9:08552997b544
Parent:
1:6799c07fe510 
Added an important comment

Who changed what in which revision?

UserRevisionLine numberNew contents of line
sv 1:6799c07fe510 1 /*
sv 1:6799c07fe510 2 * Tiny Vector Matrix Library
sv 1:6799c07fe510 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
sv 1:6799c07fe510 4 *
sv 1:6799c07fe510 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
sv 1:6799c07fe510 6 *
sv 1:6799c07fe510 7 * This library is free software; you can redistribute it and/or
sv 1:6799c07fe510 8 * modify it under the terms of the GNU Lesser General Public
sv 1:6799c07fe510 9 * License as published by the Free Software Foundation; either
sv 1:6799c07fe510 10 * version 2.1 of the License, or (at your option) any later version.
sv 1:6799c07fe510 11 *
sv 1:6799c07fe510 12 * This library is distributed in the hope that it will be useful,
sv 1:6799c07fe510 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
sv 1:6799c07fe510 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
sv 1:6799c07fe510 15 * Lesser General Public License for more details.
sv 1:6799c07fe510 16 *
sv 1:6799c07fe510 17 * You should have received a copy of the GNU Lesser General Public
sv 1:6799c07fe510 18 * License along with this library; if not, write to the Free Software
sv 1:6799c07fe510 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
sv 1:6799c07fe510 20 *
sv 1:6799c07fe510 21 * $Id: Null.h,v 1.11 2007-06-23 15:59:00 opetzold Exp $
sv 1:6799c07fe510 22 */
sv 1:6799c07fe510 23
sv 1:6799c07fe510 24 #ifndef TVMET_XPR_NULL_H
sv 1:6799c07fe510 25 #define TVMET_XPR_NULL_H
sv 1:6799c07fe510 26
sv 1:6799c07fe510 27 namespace tvmet {
sv 1:6799c07fe510 28
sv 1:6799c07fe510 29
sv 1:6799c07fe510 30 /**
sv 1:6799c07fe510 31 * \class XprNull Null.h "tvmet/xpr/Null.h"
sv 1:6799c07fe510 32 * \brief Null object design pattern
sv 1:6799c07fe510 33 */
sv 1:6799c07fe510 34 class XprNull
sv 1:6799c07fe510 35 : public TvmetBase< XprNull >
sv 1:6799c07fe510 36 {
sv 1:6799c07fe510 37 XprNull& operator=(const XprNull&);
sv 1:6799c07fe510 38
sv 1:6799c07fe510 39 public:
sv 1:6799c07fe510 40 explicit XprNull() { }
sv 1:6799c07fe510 41
sv 1:6799c07fe510 42 public: // debugging Xpr parse tree
sv 1:6799c07fe510 43 void print_xpr(std::ostream& os, std::size_t l=0) const {
sv 1:6799c07fe510 44 os << IndentLevel(l) << "XprNull[O=0]" << std::endl;
sv 1:6799c07fe510 45 }
sv 1:6799c07fe510 46 };
sv 1:6799c07fe510 47
sv 1:6799c07fe510 48
sv 1:6799c07fe510 49 #define TVMET_BINARY_OPERATOR(OP) \
sv 1:6799c07fe510 50 template< class T > \
sv 1:6799c07fe510 51 inline \
sv 1:6799c07fe510 52 T operator OP (const T& lhs, XprNull) { return lhs; }
sv 1:6799c07fe510 53
sv 1:6799c07fe510 54 TVMET_BINARY_OPERATOR(+)
sv 1:6799c07fe510 55 TVMET_BINARY_OPERATOR(-)
sv 1:6799c07fe510 56 TVMET_BINARY_OPERATOR(*)
sv 1:6799c07fe510 57 TVMET_BINARY_OPERATOR(/)
sv 1:6799c07fe510 58
sv 1:6799c07fe510 59 #undef TVMET_BINARY_OPERATOR
sv 1:6799c07fe510 60
sv 1:6799c07fe510 61
sv 1:6799c07fe510 62 } // namespace tvmet
sv 1:6799c07fe510 63
sv 1:6799c07fe510 64 #endif // TVMET_XPR_NULL_H
sv 1:6799c07fe510 65
sv 1:6799c07fe510 66 // Local Variables:
sv 1:6799c07fe510 67 // mode:C++
sv 1:6799c07fe510 68 // tab-width:8
sv 1:6799c07fe510 69 // End: