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Eurobot2012_Secondary

Fork of Eurobot_2012_Secondary by Shuto Naruse

tvmet/xpr/Eval.h@1:cc2a9eb0bd55, 2012-10-17 (annotated)

Committer:
narshu
Date:
Wed Oct 17 22:25:31 2012 +0000
Revision:
1:cc2a9eb0bd55
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narshu 1:cc2a9eb0bd55 1 /*
narshu 1:cc2a9eb0bd55 2 * Tiny Vector Matrix Library
narshu 1:cc2a9eb0bd55 3 * Dense Vector Matrix Libary of Tiny size using Expression Templates
narshu 1:cc2a9eb0bd55 4 *
narshu 1:cc2a9eb0bd55 5 * Copyright (C) 2001 - 2007 Olaf Petzold <opetzold@users.sourceforge.net>
narshu 1:cc2a9eb0bd55 6 *
narshu 1:cc2a9eb0bd55 7 * This library is free software; you can redistribute it and/or
narshu 1:cc2a9eb0bd55 8 * modify it under the terms of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 9 * License as published by the Free Software Foundation; either
narshu 1:cc2a9eb0bd55 10 * version 2.1 of the License, or (at your option) any later version.
narshu 1:cc2a9eb0bd55 11 *
narshu 1:cc2a9eb0bd55 12 * This library is distributed in the hope that it will be useful,
narshu 1:cc2a9eb0bd55 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
narshu 1:cc2a9eb0bd55 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
narshu 1:cc2a9eb0bd55 15 * Lesser General Public License for more details.
narshu 1:cc2a9eb0bd55 16 *
narshu 1:cc2a9eb0bd55 17 * You should have received a copy of the GNU Lesser General Public
narshu 1:cc2a9eb0bd55 18 * License along with this library; if not, write to the Free Software
narshu 1:cc2a9eb0bd55 19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
narshu 1:cc2a9eb0bd55 20 *
narshu 1:cc2a9eb0bd55 21 * $Id: Eval.h,v 1.13 2007-06-23 15:58:59 opetzold Exp $
narshu 1:cc2a9eb0bd55 22 */
narshu 1:cc2a9eb0bd55 23
narshu 1:cc2a9eb0bd55 24 #ifndef TVMET_XPR_EVAL_H
narshu 1:cc2a9eb0bd55 25 #define TVMET_XPR_EVAL_H
narshu 1:cc2a9eb0bd55 26
narshu 1:cc2a9eb0bd55 27 namespace tvmet {
narshu 1:cc2a9eb0bd55 28
narshu 1:cc2a9eb0bd55 29
narshu 1:cc2a9eb0bd55 30 /**
narshu 1:cc2a9eb0bd55 31 * \class XprEval Eval.h "tvmet/xpr/Eval.h"
narshu 1:cc2a9eb0bd55 32 * \brief evaluate the expression
narshu 1:cc2a9eb0bd55 33 *
narshu 1:cc2a9eb0bd55 34 * Since we can't overwrite the ? operator we have to write a wrapper
narshu 1:cc2a9eb0bd55 35 * for expression like return v1>v2 ? true : false
narshu 1:cc2a9eb0bd55 36 */
narshu 1:cc2a9eb0bd55 37 template<class E1, class E2, class E3>
narshu 1:cc2a9eb0bd55 38 class XprEval
narshu 1:cc2a9eb0bd55 39 : public TvmetBase< XprEval<E1, E2, E3> >
narshu 1:cc2a9eb0bd55 40 {
narshu 1:cc2a9eb0bd55 41 public:
narshu 1:cc2a9eb0bd55 42 typedef E1 expr1_type;
narshu 1:cc2a9eb0bd55 43 typedef E2 expr2_type;
narshu 1:cc2a9eb0bd55 44 typedef E3 expr3_type;
narshu 1:cc2a9eb0bd55 45
narshu 1:cc2a9eb0bd55 46 typedef typename expr2_type::value_type value2_type;
narshu 1:cc2a9eb0bd55 47 typedef typename expr3_type::value_type value3_type;
narshu 1:cc2a9eb0bd55 48
narshu 1:cc2a9eb0bd55 49 typedef typename
narshu 1:cc2a9eb0bd55 50 PromoteTraits<value2_type, value3_type>::value_type value_type;
narshu 1:cc2a9eb0bd55 51
narshu 1:cc2a9eb0bd55 52 public:
narshu 1:cc2a9eb0bd55 53 /** Complexity Counter */
narshu 1:cc2a9eb0bd55 54 enum {
narshu 1:cc2a9eb0bd55 55 ops_expr1 = E1::ops,
narshu 1:cc2a9eb0bd55 56 ops_expr2 = E2::ops,
narshu 1:cc2a9eb0bd55 57 ops_expr3 = E3::ops,
narshu 1:cc2a9eb0bd55 58 ops = ops_expr1 // only (e1 op e2) are evaluated
narshu 1:cc2a9eb0bd55 59 };
narshu 1:cc2a9eb0bd55 60
narshu 1:cc2a9eb0bd55 61 private:
narshu 1:cc2a9eb0bd55 62 XprEval();
narshu 1:cc2a9eb0bd55 63 XprEval& operator=(const XprEval<expr1_type, expr2_type, expr3_type>&);
narshu 1:cc2a9eb0bd55 64
narshu 1:cc2a9eb0bd55 65 public:
narshu 1:cc2a9eb0bd55 66 /** Constructor */
narshu 1:cc2a9eb0bd55 67 explicit XprEval(const expr1_type& e1, const expr2_type& e2, const expr3_type& e3)
narshu 1:cc2a9eb0bd55 68 : m_expr1(e1), m_expr2(e2), m_expr3(e3)
narshu 1:cc2a9eb0bd55 69 { }
narshu 1:cc2a9eb0bd55 70
narshu 1:cc2a9eb0bd55 71 /** Copy Constructor. Not explicit! */
narshu 1:cc2a9eb0bd55 72 #if defined(TVMET_OPTIMIZE_XPR_MANUAL_CCTOR)
narshu 1:cc2a9eb0bd55 73 XprEval(const XprEval& rhs)
narshu 1:cc2a9eb0bd55 74 : m_expr1(rhs.m_expr1), m_expr2(rhs.m_expr2), m_expr3(rhs.m_expr3)
narshu 1:cc2a9eb0bd55 75 { }
narshu 1:cc2a9eb0bd55 76 #endif
narshu 1:cc2a9eb0bd55 77
narshu 1:cc2a9eb0bd55 78 public: //access
narshu 1:cc2a9eb0bd55 79 /** index operator for vectors. */
narshu 1:cc2a9eb0bd55 80 value_type operator()(std::size_t i) const {
narshu 1:cc2a9eb0bd55 81 return m_expr1(i) ? m_expr2(i) : m_expr3(i);
narshu 1:cc2a9eb0bd55 82 }
narshu 1:cc2a9eb0bd55 83
narshu 1:cc2a9eb0bd55 84 /** index operator for matrizes. */
narshu 1:cc2a9eb0bd55 85 value_type operator()(std::size_t i, std::size_t j) const {
narshu 1:cc2a9eb0bd55 86 return m_expr1(i, j) ? m_expr2(i, j) : m_expr3(i, j);
narshu 1:cc2a9eb0bd55 87 }
narshu 1:cc2a9eb0bd55 88
narshu 1:cc2a9eb0bd55 89 public: // debugging Xpr parse tree
narshu 1:cc2a9eb0bd55 90 void print_xpr(std::ostream& os, std::size_t l=0) const {
narshu 1:cc2a9eb0bd55 91 os << IndentLevel(l++)
narshu 1:cc2a9eb0bd55 92 << "XprEval[" << ops << ", ("
narshu 1:cc2a9eb0bd55 93 << ops_expr1 << ", " << ops_expr2 << ", " << ops_expr3 << ")]<"
narshu 1:cc2a9eb0bd55 94 << std::endl;
narshu 1:cc2a9eb0bd55 95 m_expr1.print_xpr(os, l);
narshu 1:cc2a9eb0bd55 96 m_expr2.print_xpr(os, l);
narshu 1:cc2a9eb0bd55 97 m_expr3.print_xpr(os, l);
narshu 1:cc2a9eb0bd55 98 os << IndentLevel(--l)
narshu 1:cc2a9eb0bd55 99 << ">," << std::endl;
narshu 1:cc2a9eb0bd55 100 }
narshu 1:cc2a9eb0bd55 101
narshu 1:cc2a9eb0bd55 102 private:
narshu 1:cc2a9eb0bd55 103 const expr1_type m_expr1;
narshu 1:cc2a9eb0bd55 104 const expr2_type m_expr2;
narshu 1:cc2a9eb0bd55 105 const expr3_type m_expr3;
narshu 1:cc2a9eb0bd55 106 };
narshu 1:cc2a9eb0bd55 107
narshu 1:cc2a9eb0bd55 108
narshu 1:cc2a9eb0bd55 109 } // namespace tvmet
narshu 1:cc2a9eb0bd55 110
narshu 1:cc2a9eb0bd55 111 #endif // TVMET_XPR_EVAL_H
narshu 1:cc2a9eb0bd55 112
narshu 1:cc2a9eb0bd55 113 // Local Variables:
narshu 1:cc2a9eb0bd55 114 // mode:C++
narshu 1:cc2a9eb0bd55 115 // tab-width:8
narshu 1:cc2a9eb0bd55 116 // End: