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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 2020.
author John W. Eaton <jwe@octave.org>
date Mon, 06 Jan 2020 22:29:51 -0500
parents b442ec6dda5c
children bd51beb6205e
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1 /*
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2
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3 Copyright (C) 1996-2020 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 distribution
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6 or <https://octave.org/COPYRIGHT.html/>.
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7
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8
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9 This file is part of Octave.
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10
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11 Octave is free software: you can redistribute it and/or modify it
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12 under the terms of the GNU General Public License as published by
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13 the Free Software Foundation, either version 3 of the License, or
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14 (at your option) any later version.
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15
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16 Octave is distributed in the hope that it will be useful, but
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17 WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with Octave; see the file COPYING. If not, see
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23 <https://www.gnu.org/licenses/>.
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24
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25 */
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26
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27 #if ! defined (octave_pt_colon_h)
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28 #define octave_pt_colon_h 1
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29
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30 #include "octave-config.h"
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31
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32 #include <string>
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33
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34 class octave_value;
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35 class octave_value_list;
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36
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37 #include "pt-exp.h"
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38 #include "pt-walk.h"
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39
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40 namespace octave
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41 {
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42 class symbol_scope;
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43
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44 // Colon expressions.
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45
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46 class tree_colon_expression : public tree_expression
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47 {
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48 public:
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49
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50 tree_colon_expression (int l = -1, int c = -1)
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51 : tree_expression (l, c), m_base (nullptr), m_limit (nullptr),
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52 m_increment (nullptr), m_save_base (false) { }
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53
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54 tree_colon_expression (tree_expression *bas, tree_expression *lim,
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55 int l = -1, int c = -1)
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56 : tree_expression (l, c), m_base (bas), m_limit (lim),
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57 m_increment (nullptr), m_save_base (false) { }
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58
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59 tree_colon_expression (tree_expression *bas, tree_expression *lim,
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60 tree_expression *inc, int l = -1, int c = -1)
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61 : tree_expression (l, c), m_base (bas), m_limit (lim),
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62 m_increment (inc), m_save_base (false) { }
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63
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64 // No copying!
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65
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66 tree_colon_expression (const tree_colon_expression&) = delete;
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67
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68 tree_colon_expression& operator = (const tree_colon_expression&) = delete;
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69
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70 ~tree_colon_expression (void)
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71 {
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72 if (! m_save_base)
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73 delete m_base;
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75 delete m_limit;
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76 delete m_increment;
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77 }
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78
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79 bool has_magic_end (void) const
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80 {
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81 return ((m_base && m_base->has_magic_end ())
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82 || (m_limit && m_limit->has_magic_end ())
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83 || (m_increment && m_increment->has_magic_end ()));
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84 }
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85
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86 void preserve_base (void) { m_save_base = true; }
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87
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88 bool rvalue_ok (void) const { return true; }
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89
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90 void eval_error (const std::string& s) const;
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91
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92 tree_expression * base (void) { return m_base; }
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93
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94 tree_expression * limit (void) { return m_limit; }
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95
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96 tree_expression * increment (void) { return m_increment; }
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98 tree_expression * dup (symbol_scope& scope) const;
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99
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100 octave_value evaluate (tree_evaluator&, int nargout = 1);
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101
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102 octave_value_list evaluate_n (tree_evaluator& tw, int nargout = 1)
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103 {
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104 return ovl (evaluate (tw, nargout));
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105 }
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106
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107 void accept (tree_walker& tw)
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108 {
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109 tw.visit_colon_expression (*this);
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110 }
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111
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112 private:
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113
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114 // The components of the expression.
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115 tree_expression *m_base;
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116 tree_expression *m_limit;
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117 tree_expression *m_increment;
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118
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119 bool m_save_base;
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120 };
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121 }
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122
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123 #endif