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annotate libinterp/parse-tree/pt-assign.cc @ 24270:bc3819b7cca1

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don't use symbol_table:: nesting for symbol_record, symbol_scope, or fcn_info Change all uses of symbol_table::symbol_record to symbol_record. Change all uses of symbol_table::scope to symbol_scope. Change all uses of symbol_table::fcn_info to fcn_info.
author John W. Eaton <jwe@octave.org>
date Thu, 16 Nov 2017 21:43:47 -0500
parents 980f39c3ab90
children 194eb4bd202b
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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21 */
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22
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23 #if defined (HAVE_CONFIG_H)
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24 # include "config.h"
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25 #endif
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27 #include <iostream>
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28 #include <string>
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29
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30 #include "error.h"
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31 #include "ov.h"
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32 #include "pt-arg-list.h"
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33 #include "pt-assign.h"
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34
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35 namespace octave
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36 {
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37 // Simple assignment expressions.
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38
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39 tree_simple_assignment::tree_simple_assignment
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40 (tree_expression *le, tree_expression *re,
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41 bool plhs, int l, int c, octave_value::assign_op t)
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42 : tree_expression (l, c), lhs (le), rhs (re), preserve (plhs), etype (t)
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43 { }
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44
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45 tree_simple_assignment::~tree_simple_assignment (void)
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46 {
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47 if (! preserve)
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48 delete lhs;
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49
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50 delete rhs;
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51 }
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53 std::string
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54 tree_simple_assignment::oper (void) const
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55 {
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56 return octave_value::assign_op_as_string (etype);
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57 }
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58
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59 tree_expression *
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60 tree_simple_assignment::dup (symbol_scope& scope) const
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61 {
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62 tree_simple_assignment *new_sa
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63 = new tree_simple_assignment (lhs ? lhs->dup (scope) : nullptr,
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64 rhs ? rhs->dup (scope) : nullptr,
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65 preserve, etype);
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66
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67 new_sa->copy_base (*this);
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68
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69 return new_sa;
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70 }
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71
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72 // Multi-valued assignment expressions.
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73
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74 tree_multi_assignment::tree_multi_assignment
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75 (tree_argument_list *lst, tree_expression *r,
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76 bool plhs, int l, int c)
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77 : tree_expression (l, c), lhs (lst), rhs (r), preserve (plhs)
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78 { }
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79
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80 tree_multi_assignment::~tree_multi_assignment (void)
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81 {
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82 if (! preserve)
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83 delete lhs;
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84
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85 delete rhs;
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86 }
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87
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88 std::string
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89 tree_multi_assignment::oper (void) const
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90 {
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91 return octave_value::assign_op_as_string (op_type ());
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92 }
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93
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94 tree_expression *
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95 tree_multi_assignment::dup (symbol_scope&) const
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96 {
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97 panic_impossible ();
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98 return nullptr;
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99 }
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100 }
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101
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102 /*
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103 %!function varargout = f ()
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104 %! varargout{1} = nargout;
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105 %!endfunction
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106 %!
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107 %!test
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108 %! [a, ~] = f ();
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109 %! assert (a, 2);
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110 %!test
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111 %! [a, ~, ~, ~, ~] = f ();
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112 %! assert (a, 5);
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113 */