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Dependencies:   mbed mbed-rtos

tvmet/AliasProxy.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: AliasProxy.h,v 1.8 2007-06-23 15:58:58 opetzold Exp $
sv 1:6799c07fe510 22 */
sv 1:6799c07fe510 23
sv 1:6799c07fe510 24 #ifndef TVMET_ALIAS_PROXY_H
sv 1:6799c07fe510 25 #define TVMET_ALIAS_PROXY_H
sv 1:6799c07fe510 26
sv 1:6799c07fe510 27 namespace tvmet {
sv 1:6799c07fe510 28
sv 1:6799c07fe510 29
sv 1:6799c07fe510 30 /** forwards */
sv 1:6799c07fe510 31 template<class E> class AliasProxy;
sv 1:6799c07fe510 32
sv 1:6799c07fe510 33
sv 1:6799c07fe510 34 /**
sv 1:6799c07fe510 35 * \brief Simplify syntax for alias Matrices and Vectors,
sv 1:6799c07fe510 36 * where aliasing left hand values appear in the
sv 1:6799c07fe510 37 * expression.
sv 1:6799c07fe510 38 * \par Example:
sv 1:6799c07fe510 39 * \code
sv 1:6799c07fe510 40 * typedef tvmet::Matrix<double, 10, 10> matrix_type;
sv 1:6799c07fe510 41 * matrix_type m;
sv 1:6799c07fe510 42 * ...
sv 1:6799c07fe510 43 * alias(m) += trans(m);
sv 1:6799c07fe510 44 * \endcode
sv 1:6799c07fe510 45 * \sa AliasProxy
sv 1:6799c07fe510 46 * \sa Some Notes \ref alias
sv 1:6799c07fe510 47 */
sv 1:6799c07fe510 48 template<class E>
sv 1:6799c07fe510 49 AliasProxy<E> alias(E& expr) { return AliasProxy<E>(expr); }
sv 1:6799c07fe510 50
sv 1:6799c07fe510 51
sv 1:6799c07fe510 52 /**
sv 1:6799c07fe510 53 * \class AliasProxy AliasProxy.h "tvmet/AliasProxy.h"
sv 1:6799c07fe510 54 * \brief Assign proxy for alias Matrices and Vectors.
sv 1:6799c07fe510 55 *
sv 1:6799c07fe510 56 * A short lived object to provide simplified alias syntax.
sv 1:6799c07fe510 57 * Only the friend function alias is allowed to create
sv 1:6799c07fe510 58 * such a object. The proxy calls the appropriate member
sv 1:6799c07fe510 59 * alias_xyz() which have to use temporaries to avoid
sv 1:6799c07fe510 60 * overlapping memory regions.
sv 1:6799c07fe510 61 * \sa alias
sv 1:6799c07fe510 62 * \sa Some Notes \ref alias
sv 1:6799c07fe510 63 * \note Thanks to ublas-dev group, where the principle idea
sv 1:6799c07fe510 64 * comes from.
sv 1:6799c07fe510 65 */
sv 1:6799c07fe510 66 template<class E>
sv 1:6799c07fe510 67 class AliasProxy
sv 1:6799c07fe510 68 {
sv 1:6799c07fe510 69 AliasProxy(const AliasProxy&);
sv 1:6799c07fe510 70 AliasProxy& operator=(const AliasProxy&);
sv 1:6799c07fe510 71
sv 1:6799c07fe510 72 friend AliasProxy<E> alias<>(E& expr);
sv 1:6799c07fe510 73
sv 1:6799c07fe510 74 public:
sv 1:6799c07fe510 75 AliasProxy(E& expr) : m_expr(expr) { }
sv 1:6799c07fe510 76
sv 1:6799c07fe510 77
sv 1:6799c07fe510 78 template<class E2>
sv 1:6799c07fe510 79 E& operator=(const E2& expr) {
sv 1:6799c07fe510 80 return m_expr.alias_assign(expr);
sv 1:6799c07fe510 81 }
sv 1:6799c07fe510 82
sv 1:6799c07fe510 83 template<class E2>
sv 1:6799c07fe510 84 E& operator+=(const E2& expr) {
sv 1:6799c07fe510 85 return m_expr.alias_add_eq(expr);
sv 1:6799c07fe510 86 }
sv 1:6799c07fe510 87
sv 1:6799c07fe510 88 template<class E2>
sv 1:6799c07fe510 89 E& operator-=(const E2& expr) {
sv 1:6799c07fe510 90 return m_expr.alias_sub_eq(expr);
sv 1:6799c07fe510 91 }
sv 1:6799c07fe510 92
sv 1:6799c07fe510 93 template<class E2>
sv 1:6799c07fe510 94 E& operator*=(const E2& expr) {
sv 1:6799c07fe510 95 return m_expr.alias_mul_eq(expr);
sv 1:6799c07fe510 96 }
sv 1:6799c07fe510 97
sv 1:6799c07fe510 98 template<class E2>
sv 1:6799c07fe510 99 E& operator/=(const E2& expr) {
sv 1:6799c07fe510 100 return m_expr.alias_div_eq(expr);
sv 1:6799c07fe510 101 }
sv 1:6799c07fe510 102
sv 1:6799c07fe510 103 private:
sv 1:6799c07fe510 104 E& m_expr;
sv 1:6799c07fe510 105 };
sv 1:6799c07fe510 106
sv 1:6799c07fe510 107
sv 1:6799c07fe510 108 #if 0
sv 1:6799c07fe510 109 namespace element_wise {
sv 1:6799c07fe510 110 // \todo to write
sv 1:6799c07fe510 111 template<class E, class E2>
sv 1:6799c07fe510 112 E& operator/=(AliasProxy<E>& proxy, const E2& rhs) {
sv 1:6799c07fe510 113 return proxy.div_upd(rhs);
sv 1:6799c07fe510 114 }
sv 1:6799c07fe510 115
sv 1:6799c07fe510 116 }
sv 1:6799c07fe510 117 #endif
sv 1:6799c07fe510 118
sv 1:6799c07fe510 119
sv 1:6799c07fe510 120 } // namespace tvmet
sv 1:6799c07fe510 121
sv 1:6799c07fe510 122
sv 1:6799c07fe510 123 #endif /* TVMET_ALIAS_PROXY_H */
sv 1:6799c07fe510 124
sv 1:6799c07fe510 125 // Local Variables:
sv 1:6799c07fe510 126 // mode:C++
sv 1:6799c07fe510 127 // tab-width:8
sv 1:6799c07fe510 128 // End: