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annotate libinterp/parse-tree/pt-id.cc @ 16282:82ff1c5bbff0 classdef

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maint: periodic merge of default to classdef
author John W. Eaton <jwe@octave.org>
date Mon, 11 Mar 2013 17:11:46 -0400
parents 0259254a3ccc
children 2ed5bc680c71
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1 /*
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2
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3 Copyright (C) 1996-2012 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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include "error.h"
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28 #include "oct-obj.h"
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29 #include "oct-lvalue.h"
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30 #include "pager.h"
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31 #include "pt-bp.h"
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32 #include "pt-const.h"
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33 #include "pt-eval.h"
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34 #include "pt-id.h"
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35 #include "pt-walk.h"
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36 #include "symtab.h"
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37 #include "utils.h"
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38 #include "variables.h"
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39
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40 // Symbols from the symbol table.
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41
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42 void
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43 tree_identifier::eval_undefined_error (void)
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44 {
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45 int l = line ();
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46 int c = column ();
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47
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48 maybe_missing_function_hook (name ());
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49 if (error_state)
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50 return;
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51
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52 if (l == -1 && c == -1)
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53 ::error_with_id ("Octave:undefined-function",
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54 "'%s' undefined", name ().c_str ());
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55 else
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56 ::error_with_id ("Octave:undefined-function",
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57 "'%s' undefined near line %d column %d",
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58 name ().c_str (), l, c);
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59 }
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60
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61 octave_value_list
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62 tree_identifier::rvalue (int nargout,
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63 const std::list<octave_lvalue> *lvalue_list)
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64 {
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65 octave_value_list retval;
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66
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67 if (error_state)
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68 return retval;
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69
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70 octave_value val = sym->find ();
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71
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72 if (val.is_defined ())
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73 {
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74 // GAGME -- this would be cleaner if we required
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75 // parens to indicate function calls.
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76 //
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77 // If this identifier refers to a function, we need to know
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78 // whether it is indexed so that we can do the same thing
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79 // for 'f' and 'f()'. If the index is present and the function
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80 // object declares it can handle it, return the function object
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81 // and let tree_index_expression::rvalue handle indexing.
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82 // Otherwise, arrange to call the function here, so that we don't
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83 // return the function definition as a value.
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84
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85 octave_function *fcn = 0;
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86
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87 if (val.is_function ())
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88 fcn = val.function_value (true);
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89
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90 if (fcn && ! (is_postfix_indexed ()
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91 && fcn->is_postfix_index_handled (postfix_index ())))
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92 {
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93 octave_value_list tmp_args;
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94
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95 retval = (lvalue_list
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96 ? val.do_multi_index_op (nargout, tmp_args, lvalue_list)
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97 : val.do_multi_index_op (nargout, tmp_args));
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98 }
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99 else
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100 {
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101 if (print_result () && nargout == 0
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102 && tree_evaluator::statement_printing_enabled ())
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103 val.print_with_name (octave_stdout, name ());
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104
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105 retval = val;
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106 }
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107 }
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108 else if (sym->is_added_static ())
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109 static_workspace_error ();
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110 else
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111 eval_undefined_error ();
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112
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113 return retval;
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114 }
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115
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116 octave_value
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117 tree_identifier::rvalue1 (int nargout)
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118 {
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119 octave_value retval;
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120
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121 octave_value_list tmp = rvalue (nargout);
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122
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123 if (! tmp.empty ())
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124 retval = tmp(0);
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125
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126 return retval;
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127 }
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128
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129 octave_lvalue
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130 tree_identifier::lvalue (void)
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131 {
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132 if (sym->is_added_static ())
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133 static_workspace_error ();
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134
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135 return octave_lvalue (&(sym->varref ()));
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136 }
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137
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138 tree_identifier *
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139 tree_identifier::dup (symbol_table::scope_id sc,
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140 symbol_table::context_id) const
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141 {
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142 // The new tree_identifier object contains a symbol_record
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143 // entry from the duplicated scope.
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144
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145 // FIXME -- is this the best way?
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146 symbol_table::symbol_record new_sym
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147 = symbol_table::find_symbol (name (), sc);
7336
745a8299c2b5 [project @ 2007-12-28 20:56:55 by jwe]
jwe
parents: 7017
diff changeset
148
745a8299c2b5 [project @ 2007-12-28 20:56:55 by jwe]
jwe
parents: 7017
diff changeset
149 tree_identifier *new_id
745a8299c2b5 [project @ 2007-12-28 20:56:55 by jwe]
jwe
parents: 7017
diff changeset
150 = new tree_identifier (new_sym, line (), column ());
5861
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
151
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
152 new_id->copy_base (*this);
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
153
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
154 return new_id;
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
155 }
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
jwe
parents: 5775
diff changeset
156
2887
4b71bb90c388 [project @ 1997-04-28 01:20:55 by jwe]
jwe
parents:
diff changeset
157 void
4b71bb90c388 [project @ 1997-04-28 01:20:55 by jwe]
jwe
parents:
diff changeset
158 tree_identifier::accept (tree_walker& tw)
4b71bb90c388 [project @ 1997-04-28 01:20:55 by jwe]
jwe
parents:
diff changeset
159 {
4b71bb90c388 [project @ 1997-04-28 01:20:55 by jwe]
jwe
parents:
diff changeset
160 tw.visit_identifier (*this);
4b71bb90c388 [project @ 1997-04-28 01:20:55 by jwe]
jwe
parents:
diff changeset
161 }