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annotate libinterp/parse-tree/oct-lvalue.h @ 24350:b991accccd4c

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move oct-lvalue files from corefcn to parse-tree directory * ov-base.h, ov.h: Delete unnecessary forward declarations for octave_lvalue. * oct-lvalue.h, oct-lvalue.cc: Move from libinterp/corefcn to libinterp/parse-tree directory. * libinterp/corefcn/module.mk, libinterp/parse-tree/module.mk: Update.
author John W. Eaton <jwe@octave.org>
date Wed, 29 Nov 2017 15:18:52 -0500
parents libinterp/corefcn/oct-lvalue.h@bc3819b7cca1
children cc3b3ceb155c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2
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3 Copyright (C) 1996-2017 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation; either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <http://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 #if ! defined (octave_oct_lvalue_h)
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24 #define octave_oct_lvalue_h 1
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25
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26 #include "octave-config.h"
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27
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28 class octave_value;
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29 class octave_value_list;
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30
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31 #include <string>
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32
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33 #include "ovl.h"
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34 #include "symtab.h"
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35
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36 class
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37 octave_lvalue
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38 {
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39 public:
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40
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41 octave_lvalue (const octave::symbol_record& s
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42 = octave::symbol_record ())
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43 : sym (s), black_hole (false), type (), idx (), nel (1)
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44 { }
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45
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46 octave_lvalue (const octave_lvalue& vr)
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47 : sym (vr.sym), black_hole (vr.black_hole), type (vr.type), idx (vr.idx), nel (vr.nel)
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48 { }
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49
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50 octave_lvalue& operator = (const octave_lvalue& vr)
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51 {
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52 if (this != &vr)
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53 {
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54 sym = vr.sym;
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55 black_hole = vr.black_hole;
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56 type = vr.type;
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57 idx = vr.idx;
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58 nel = vr.nel;
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59 }
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60
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61 return *this;
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62 }
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63
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64 ~octave_lvalue (void) = default;
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65
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66 bool is_black_hole (void) const { return black_hole; }
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67
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68 void mark_black_hole (void) { black_hole = true; }
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69
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70 bool is_defined (void) const
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71 {
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72 return ! is_black_hole () && sym.is_defined ();
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73 }
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74
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75 bool is_undefined (void) const
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76 {
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77 return is_black_hole () || sym.is_undefined ();
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78 }
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79
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80 bool isstruct (void) const { return value().isstruct (); }
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81
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82 void define (const octave_value& v) { sym.assign (v); }
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83
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84 void assign (octave_value::assign_op, const octave_value&);
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85
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86 void numel (octave_idx_type n) { nel = n; }
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87
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88 octave_idx_type numel (void) const { return nel; }
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89
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90 void set_index (const std::string& t, const std::list<octave_value_list>& i);
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91
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92 void clear_index (void) { type = ""; idx.clear (); }
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93
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94 std::string index_type (void) const { return type; }
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95
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96 bool index_is_empty (void) const;
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98 void do_unary_op (octave_value::unary_op op);
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99
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100 octave_value value (void) const;
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101
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102 private:
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103
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104 octave::symbol_record sym;
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105
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106 bool black_hole;
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107
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108 std::string type;
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109
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110 std::list<octave_value_list> idx;
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111
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112 octave_idx_type nel;
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113 };
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114
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115 #endif