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Dependencies:   mbed mbed-rtos

tvmet/xpr/UnOperator.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: UnOperator.h,v 1.17 2007-06-23 15:59:00 opetzold Exp $
sv 1:6799c07fe510 22 */
sv 1:6799c07fe510 23
sv 1:6799c07fe510 24 #ifndef TVMET_XPR_UNOPERATOR_H
sv 1:6799c07fe510 25 #define TVMET_XPR_UNOPERATOR_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 XprUnOp UnOperator.h "tvmet/xpr/UnOperator.h"
sv 1:6799c07fe510 32 * \brief Unary operator working on one subexpression.
sv 1:6799c07fe510 33 *
sv 1:6799c07fe510 34 * Using the access operator() the unary operation will be evaluated.
sv 1:6799c07fe510 35 */
sv 1:6799c07fe510 36 template<class UnOp, class E>
sv 1:6799c07fe510 37 class XprUnOp
sv 1:6799c07fe510 38 : public TvmetBase< XprUnOp<UnOp, E> >
sv 1:6799c07fe510 39 {
sv 1:6799c07fe510 40 XprUnOp();
sv 1:6799c07fe510 41 XprUnOp& operator=(const XprUnOp&);
sv 1:6799c07fe510 42
sv 1:6799c07fe510 43 public:
sv 1:6799c07fe510 44 typedef typename UnOp::value_type value_type;
sv 1:6799c07fe510 45
sv 1:6799c07fe510 46 public:
sv 1:6799c07fe510 47 /** Complexity counter. */
sv 1:6799c07fe510 48 enum {
sv 1:6799c07fe510 49 ops_expr = E::ops,
sv 1:6799c07fe510 50 ops = 1 * ops_expr
sv 1:6799c07fe510 51 };
sv 1:6799c07fe510 52
sv 1:6799c07fe510 53 public:
sv 1:6799c07fe510 54 /** Constructor for an expressions. */
sv 1:6799c07fe510 55 explicit XprUnOp(const E& e)
sv 1:6799c07fe510 56 : m_expr(e)
sv 1:6799c07fe510 57 { }
sv 1:6799c07fe510 58
sv 1:6799c07fe510 59 /** Copy Constructor. Not explicit! */
sv 1:6799c07fe510 60 #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
sv 1:6799c07fe510 61 XprUnOp(const XprUnOp& e)
sv 1:6799c07fe510 62 : m_expr(e.m_expr)
sv 1:6799c07fe510 63 { }
sv 1:6799c07fe510 64 #endif
sv 1:6799c07fe510 65
sv 1:6799c07fe510 66 /** Index operator, evaluates the expression inside. */
sv 1:6799c07fe510 67 value_type operator()(std::size_t i) const {
sv 1:6799c07fe510 68 return UnOp::apply_on(m_expr(i));
sv 1:6799c07fe510 69 }
sv 1:6799c07fe510 70
sv 1:6799c07fe510 71 /** index operator for arrays/matrices. */
sv 1:6799c07fe510 72 value_type operator()(std::size_t i, std::size_t j) const {
sv 1:6799c07fe510 73 return UnOp::apply_on(m_expr(i, j));
sv 1:6799c07fe510 74 }
sv 1:6799c07fe510 75
sv 1:6799c07fe510 76 public: // debugging Xpr parse tree
sv 1:6799c07fe510 77 void print_xpr(std::ostream& os, std::size_t l=0) const {
sv 1:6799c07fe510 78 os << IndentLevel(l++)
sv 1:6799c07fe510 79 << "XprUnOp[O="<< ops << ", (O=" << ops_expr << ")]<"
sv 1:6799c07fe510 80 << std::endl;
sv 1:6799c07fe510 81 UnOp::print_xpr(os, l);
sv 1:6799c07fe510 82 m_expr.print_xpr(os, l);
sv 1:6799c07fe510 83 os << IndentLevel(--l)
sv 1:6799c07fe510 84 << ">," << std::endl;
sv 1:6799c07fe510 85 }
sv 1:6799c07fe510 86
sv 1:6799c07fe510 87 private:
sv 1:6799c07fe510 88 const E m_expr;
sv 1:6799c07fe510 89 };
sv 1:6799c07fe510 90
sv 1:6799c07fe510 91
sv 1:6799c07fe510 92 } // namespace tvmet
sv 1:6799c07fe510 93
sv 1:6799c07fe510 94 #endif // TVMET_XPR_UNOPERATOR_H
sv 1:6799c07fe510 95
sv 1:6799c07fe510 96 // Local Variables:
sv 1:6799c07fe510 97 // mode:C++
sv 1:6799c07fe510 98 // tab-width:8
sv 1:6799c07fe510 99 // End: