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annotate libinterp/parse-tree/pt-arg-list.cc @ 17535:c12c688a35ed default tip lyh

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Fix warnings
author LYH <lyh.kernel@gmail.com>
date Fri, 27 Sep 2013 17:43:27 +0800
parents f0edd6c752e9
children
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) 1996-2012 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 <iostream>
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28 #include <string>
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29
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30 #include "str-vec.h"
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31
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32 #include "defun.h"
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33 #include "error.h"
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34 #include "oct-lvalue.h"
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35 #include "oct-obj.h"
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36 #include "ov.h"
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37 #include "ov-usr-fcn.h"
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38 #include "parse.h"
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39 #include "pt-arg-list.h"
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40 #include "pt-exp.h"
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41 #include "pt-id.h"
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42 #include "pt-pr-code.h"
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43 #include "pt-walk.h"
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44 #include "toplev.h"
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45 #include "unwind-prot.h"
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46
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47 // Argument lists.
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48
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49 tree_argument_list::~tree_argument_list (void)
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50 {
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51 while (! empty ())
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52 {
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53 iterator p = begin ();
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54 delete *p;
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55 erase (p);
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56 }
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57 }
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58
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59 bool
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60 tree_argument_list::has_magic_end (void) const
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61 {
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62 for (const_iterator p = begin (); p != end (); p++)
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63 {
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64 tree_expression *elt = *p;
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65
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66 if (elt && elt->has_magic_end ())
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67 return true;
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68 }
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69
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70 return false;
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71 }
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72
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73 void
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74 tree_argument_list::append (const element_type& s)
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75 {
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76 octave_base_list<tree_expression *>::append (s);
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77
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78 if (! list_includes_magic_end && s && s->has_magic_end ())
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79 list_includes_magic_end = true;
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80
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81 if (! list_includes_magic_tilde && s && s->is_identifier ())
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82 {
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83 tree_identifier *id = dynamic_cast<tree_identifier *> (s);
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84 list_includes_magic_tilde = id && id->is_black_hole ();
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85 }
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86 }
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87
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88 bool
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89 tree_argument_list::all_elements_are_constant (void) const
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90 {
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91 for (const_iterator p = begin (); p != end (); p++)
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92 {
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93 tree_expression *elt = *p;
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94
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95 if (! elt->is_constant ())
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96 return false;
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97 }
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98
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99 return true;
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100 }
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101
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102 bool
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103 tree_argument_list::is_valid_lvalue_list (void) const
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104 {
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105 bool retval = true;
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106
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107 for (const_iterator p = begin (); p != end (); p++)
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108 {
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109 tree_expression *elt = *p;
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110
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111 // There is no need for a separate check for the magic "~" because
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112 // it represented by tree_black_hole, and that is derived from
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113 // tree_identifier.
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114
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115 if (! (elt->is_identifier () || elt->is_index_expression ()))
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116 {
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117 retval = false;
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118 break;
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119 }
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120 }
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121
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122 return retval;
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123 }
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124
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125 static const octave_value *indexed_object = 0;
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126 static int index_position = 0;
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127 static int num_indices = 0;
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128
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129 DEFCONSTFUN (end, , ,
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130 "internal function")
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131 {
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132 octave_value retval;
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133
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134 if (indexed_object)
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135 {
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136 if (indexed_object->is_object ())
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137 {
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138 octave_value_list args;
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139
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140 args(2) = num_indices;
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141 args(1) = index_position + 1;
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142 args(0) = *indexed_object;
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143
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144 std::string class_name = indexed_object->class_name ();
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145
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146 octave_value meth = symbol_table::find_method ("end", class_name);
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147
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148 if (meth.is_defined ())
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149 return feval (meth.function_value (), args, 1);
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150 }
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2b2ca62f8ab6 dispatch to user-defined end function for classes if one is defined
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parents: 7767
diff changeset
151
4671
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parents: 4432
diff changeset
152 dim_vector dv = indexed_object->dims ();
7751
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153 int ndims = dv.length ();
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154
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155 if (num_indices < ndims)
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156 {
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157 for (int i = num_indices; i < ndims; i++)
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diff changeset
158 dv(num_indices-1) *= dv(i);
4256
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159
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160 if (num_indices == 1)
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161 {
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162 ndims = 2;
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163 dv.resize (ndims);
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164 dv(1) = 1;
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165 }
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166 else
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167 {
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168 ndims = num_indices;
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169 dv.resize (ndims);
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170 }
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171 }
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172
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173 if (index_position < ndims)
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174 retval = dv(index_position);
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175 else
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176 retval = 1;
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177 }
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178 else
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179 ::error ("invalid use of end");
4234
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180
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181 return retval;
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182 }
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183
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184 octave_value_list
4234
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185 tree_argument_list::convert_to_const_vector (const octave_value *object)
2982
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186 {
4256
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187 // END doesn't make sense for functions. Maybe we need a different
2b9c6dc25449 [project @ 2002-12-31 21:48:54 by jwe]
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188 // way of asking an octave_value object this question?
2b9c6dc25449 [project @ 2002-12-31 21:48:54 by jwe]
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189
4258
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190 bool stash_object = (list_includes_magic_end
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191 && object
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192 && ! (object->is_function ()
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193 || object->is_function_handle ()));
11586
12df7854fa7c strip trailing whitespace from source files
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194
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195 unwind_protect frame;
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196
4256
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197 if (stash_object)
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198 {
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199 frame.protect_var (indexed_object);
4256
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200
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diff changeset
201 indexed_object = object;
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202 }
4234
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203
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204 int len = length ();
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205
8580
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diff changeset
206 std::list<octave_value_list> args;
2982
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207
4219
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diff changeset
208 iterator p = begin ();
2982
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diff changeset
209 for (int k = 0; k < len; k++)
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
210 {
4974
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parents: 4671
diff changeset
211 if (stash_object)
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diff changeset
212 {
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diff changeset
213 frame.protect_var (index_position);
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diff changeset
214 frame.protect_var (num_indices);
4974
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diff changeset
215
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diff changeset
216 index_position = k;
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217 num_indices = len;
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diff changeset
218 }
4234
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diff changeset
219
4219
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diff changeset
220 tree_expression *elt = *p++;
2982
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diff changeset
221
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
222 if (elt)
10315
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diff changeset
223 {
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diff changeset
224 octave_value tmp = elt->rvalue1 ();
2982
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diff changeset
225
10315
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diff changeset
226 if (error_state)
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diff changeset
227 {
57a59eae83cc untabify src C++ source files
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diff changeset
228 ::error ("evaluating argument list element number %d", k+1);
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diff changeset
229 args.clear ();
57a59eae83cc untabify src C++ source files
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diff changeset
230 break;
57a59eae83cc untabify src C++ source files
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diff changeset
231 }
57a59eae83cc untabify src C++ source files
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diff changeset
232 else
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diff changeset
233 {
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diff changeset
234 if (tmp.is_cs_list ())
8580
188d38a553c7 further indexing optimization touches
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diff changeset
235 args.push_back (tmp.list_value ());
10315
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diff changeset
236 else if (tmp.is_defined ())
8580
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diff changeset
237 args.push_back (tmp);
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238 }
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diff changeset
239 }
2982
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diff changeset
240 else
10315
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diff changeset
241 {
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diff changeset
242 args.push_back (octave_value ());
57a59eae83cc untabify src C++ source files
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diff changeset
243 break;
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diff changeset
244 }
2982
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diff changeset
245 }
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parents:
diff changeset
246
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
247 return args;
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parents:
diff changeset
248 }
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diff changeset
249
5846
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
250 std::list<octave_lvalue>
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
jwe
parents: 5775
diff changeset
251 tree_argument_list::lvalue_list (void)
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diff changeset
252 {
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
253 std::list<octave_lvalue> retval;
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
254
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
255 for (tree_argument_list::iterator p = begin ();
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
256 p != end ();
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
jwe
parents: 5775
diff changeset
257 p++)
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
jwe
parents: 5775
diff changeset
258 {
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parents: 5775
diff changeset
259 tree_expression *elt = *p;
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diff changeset
260
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
261 retval.push_back (elt->lvalue ());
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
262 }
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
263
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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parents: 5775
diff changeset
264 return retval;
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
jwe
parents: 5775
diff changeset
265 }
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
266
2982
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diff changeset
267 string_vector
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parents:
diff changeset
268 tree_argument_list::get_arg_names (void) const
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parents:
diff changeset
269 {
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parents:
diff changeset
270 int len = length ();
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diff changeset
271
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
272 string_vector retval (len);
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
273
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
274 int k = 0;
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parents:
diff changeset
275
4219
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parents: 4212
diff changeset
276 for (const_iterator p = begin (); p != end (); p++)
2982
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parents:
diff changeset
277 {
4219
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diff changeset
278 tree_expression *elt = *p;
2982
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parents:
diff changeset
279
2991
fc751d2a99fd [project @ 1997-05-16 21:00:48 by jwe]
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parents: 2982
diff changeset
280 retval(k++) = elt->str_print_code ();
2982
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parents:
diff changeset
281 }
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
282
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
283 return retval;
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
284 }
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
285
16360
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
286 std::list<std::string>
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
287 tree_argument_list::variable_names (void) const
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
288 {
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
289 std::list<std::string> retval;
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
290
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
291 for (const_iterator p = begin (); p != end (); p++)
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
292 {
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
293 tree_expression *elt = *p;
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
294
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
295 if (elt->is_identifier ())
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
296 {
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
297 tree_identifier *id = dynamic_cast<tree_identifier *> (elt);
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
298
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
299 retval.push_back (id->name ());
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
300 }
16755
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
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diff changeset
301 else if (elt->is_index_expression ())
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
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diff changeset
302 {
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
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diff changeset
303 tree_index_expression *idx_expr
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
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diff changeset
304 = dynamic_cast<tree_index_expression *> (elt);
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
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parents: 16360
diff changeset
305
787168f5f858 tag symbols in indexed assignments as variables (bug #39240)
John W. Eaton <jwe@octave.org>
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306 retval.push_back (idx_expr->name ());
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307 }
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308 }
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309
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310 return retval;
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311 }
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312
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313 tree_argument_list *
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314 tree_argument_list::dup (symbol_table::scope_id scope,
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315 symbol_table::context_id context) const
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316 {
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317 tree_argument_list *new_list = new tree_argument_list ();
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318
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319 new_list->list_includes_magic_end = list_includes_magic_end;
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320 new_list->simple_assign_lhs = simple_assign_lhs;
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321
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322 for (const_iterator p = begin (); p != end (); p++)
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323 {
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324 const tree_expression *elt = *p;
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325
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326 new_list->append (elt ? elt->dup (scope, context) : 0);
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327 }
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328
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329 return new_list;
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330 }
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331
2982
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332 void
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333 tree_argument_list::accept (tree_walker& tw)
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334 {
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335 tw.visit_argument_list (*this);
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336 }