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annotate libinterp/parse-tree/pt-colon.h @ 29358:0a5b15007766 stable

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update Octave Project Developers copyright for the new year In files that have the "Octave Project Developers" copyright notice, update for 2021.
author John W. Eaton <jwe@octave.org>
date Wed, 10 Feb 2021 09:52:15 -0500
parents 2219b0ed8754
children 796f54d4ddbf
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 1996-2021 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 #if ! defined (octave_pt_colon_h)
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27 #define octave_pt_colon_h 1
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28
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29 #include "octave-config.h"
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30
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31 #include <string>
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32
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33 class octave_value;
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34 class octave_value_list;
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35
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36 #include "pt-exp.h"
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37 #include "pt-walk.h"
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38
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39 namespace octave
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40 {
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41 class symbol_scope;
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42
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43 // Colon expressions.
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44
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45 class tree_colon_expression : public tree_expression
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46 {
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47 public:
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48
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49 tree_colon_expression (int l = -1, int c = -1)
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50 : tree_expression (l, c), m_base (nullptr), m_limit (nullptr),
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51 m_increment (nullptr), m_save_base (false) { }
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52
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53 tree_colon_expression (tree_expression *bas, tree_expression *lim,
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54 int l = -1, int c = -1)
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55 : tree_expression (l, c), m_base (bas), m_limit (lim),
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56 m_increment (nullptr), m_save_base (false) { }
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57
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58 tree_colon_expression (tree_expression *bas, tree_expression *lim,
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59 tree_expression *inc, int l = -1, int c = -1)
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60 : tree_expression (l, c), m_base (bas), m_limit (lim),
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61 m_increment (inc), m_save_base (false) { }
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62
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63 // No copying!
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64
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65 tree_colon_expression (const tree_colon_expression&) = delete;
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66
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67 tree_colon_expression& operator = (const tree_colon_expression&) = delete;
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68
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69 ~tree_colon_expression (void)
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70 {
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71 if (! m_save_base)
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72 delete m_base;
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73
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74 delete m_limit;
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75 delete m_increment;
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76 }
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77
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78 void preserve_base (void) { m_save_base = true; }
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79
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80 bool rvalue_ok (void) const { return true; }
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81
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82 void eval_error (const std::string& s) const;
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83
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84 tree_expression * base (void) { return m_base; }
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85
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86 tree_expression * limit (void) { return m_limit; }
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87
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88 tree_expression * increment (void) { return m_increment; }
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89
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90 tree_expression * dup (symbol_scope& scope) const;
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91
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92 octave_value evaluate (tree_evaluator&, int nargout = 1);
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93
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94 octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1)
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95 {
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96 return ovl (evaluate (tw, nargout));
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97 }
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98
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99 void accept (tree_walker& tw)
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100 {
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101 tw.visit_colon_expression (*this);
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102 }
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103
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104 private:
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105
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106 // The components of the expression.
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107 tree_expression *m_base;
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108 tree_expression *m_limit;
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109 tree_expression *m_increment;
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110
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111 bool m_save_base;
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112 };
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113 }
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114
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115 #endif