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annotate libinterp/corefcn/oct-lvalue.h @ 19840:c5270263d466 gui-release

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close gui-release branch
author John W. Eaton <jwe@octave.org>
date Fri, 30 Jan 2015 17:41:50 -0500
parents ebb3ef964372
children 4197fc428c7d
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1 /*
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2
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3 Copyright (C) 1996-2013 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 the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 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 WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 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 class octave_value;
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27 class octave_value_list;
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28
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29 #include <string>
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30
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31 #include "oct-obj.h"
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32 #include "pt-idx.h"
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33 #include "symtab.h"
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34
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35 class
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36 octave_lvalue
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37 {
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38 public:
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39
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40 octave_lvalue (const symbol_table::symbol_reference& s
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41 = symbol_table::symbol_reference ())
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42 : sym (s), type (), idx (), nel (1)
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43 { }
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44
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45 octave_lvalue (const octave_lvalue& vr)
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46 : sym (vr.sym), type (vr.type), idx (vr.idx), nel (vr.nel)
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47 { }
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48
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49 octave_lvalue& operator = (const octave_lvalue& vr)
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50 {
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51 if (this != &vr)
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52 {
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53 sym = vr.sym;
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54 type = vr.type;
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55 idx = vr.idx;
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56 nel = vr.nel;
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57 }
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58
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59 return *this;
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60 }
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61
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62 ~octave_lvalue (void) { }
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63
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64 bool is_black_hole (void) const { return sym.is_black_hole (); }
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65
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66 bool is_defined (void) const
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67 {
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68 return ! is_black_hole () && sym->is_defined ();
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69 }
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70
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71 bool is_undefined (void) const
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72 {
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73 return is_black_hole () || sym->is_undefined ();
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74 }
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75
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76 bool is_map (void) const
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77 {
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78 return value().is_map ();
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79 }
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80
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81 void define (const octave_value& v) { sym->assign (v); }
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82
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83 void assign (octave_value::assign_op, const octave_value&);
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84
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85 void numel (octave_idx_type n) { nel = n; }
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86
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87 octave_idx_type numel (void) const { return nel; }
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88
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89 void set_index (const std::string& t, const std::list<octave_value_list>& i);
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90
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91 void clear_index (void) { type = std::string (); idx.clear (); }
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92
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93 void do_unary_op (octave_value::unary_op op);
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94
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95 octave_value value (void) const;
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96
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97 private:
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98
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99 symbol_table::symbol_reference sym;
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100
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101 std::string type;
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102
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103 std::list<octave_value_list> idx;
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104
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105 octave_idx_type nel;
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106 };
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107
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108 #endif