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annotate libinterp/parse-tree/pt-arg-list.cc @ 20622:128414587af2

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don't print additional error message in argument list evaluation * pt-arg-list.cc (tree_argument_list::convert_to_const_vector): Don't call error for for failed argument evaluation.
author John W. Eaton <jwe@octave.org>
date Fri, 09 Oct 2015 16:52:49 -0400
parents 22618d5fb6ad
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) 1996-2015 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 "-*- texinfo -*-\n\
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131 @deftypefn {Built-in Function} {} end\n\
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132 The magic index @qcode{\"end\"} refers to the last valid entry in an indexing\n\
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133 operation.\n\
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134 \n\
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135 Example:\n\
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136 \n\
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137 @example\n\
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138 @group\n\
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139 @var{x} = [ 1 2 3\n\
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140 4 5 6 ];\n\
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141 @var{x}(1,end)\n\
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142 @result{} 3\n\
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143 @var{x}(end,1)\n\
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144 @result{} 4\n\
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145 @var{x}(end,end)\n\
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146 @result{} 6\n\
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147 @end group\n\
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148 @end example\n\
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149 @end deftypefn")
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150 {
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151 octave_value retval;
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152
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diff changeset
153 if (indexed_object)
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154 {
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155 if (indexed_object->is_object ())
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156 {
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157 octave_value_list args;
8136
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158
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159 args(2) = num_indices;
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160 args(1) = index_position + 1;
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161 args(0) = *indexed_object;
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162
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163 std::string class_name = indexed_object->class_name ();
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164
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165 octave_value meth = symbol_table::find_method ("end", class_name);
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166
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167 if (meth.is_defined ())
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168 return feval (meth.function_value (), args, 1);
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169 }
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170
4671
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171 dim_vector dv = indexed_object->dims ();
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172 int ndims = dv.length ();
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173
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174 if (num_indices < ndims)
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175 {
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176 for (int i = num_indices; i < ndims; i++)
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177 dv(num_indices-1) *= dv(i);
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178
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179 if (num_indices == 1)
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180 {
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181 ndims = 2;
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182 dv.resize (ndims);
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183 dv(1) = 1;
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184 }
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185 else
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186 {
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187 ndims = num_indices;
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188 dv.resize (ndims);
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189 }
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190 }
4234
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191
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192 if (index_position < ndims)
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193 retval = dv(index_position);
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194 else
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195 retval = 1;
4234
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196 }
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197 else
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198 error ("invalid use of end");
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199
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200 return retval;
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201 }
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202
2982
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203 octave_value_list
4234
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204 tree_argument_list::convert_to_const_vector (const octave_value *object)
2982
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205 {
4256
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206 // END doesn't make sense for functions. Maybe we need a different
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207 // way of asking an octave_value object this question?
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208
4258
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209 bool stash_object = (list_includes_magic_end
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210 && object
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211 && ! (object->is_function ()
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212 || object->is_function_handle ()));
11586
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213
10066
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Jaroslav Hajek <highegg@gmail.com>
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214 unwind_protect frame;
4234
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215
4256
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diff changeset
216 if (stash_object)
2b9c6dc25449 [project @ 2002-12-31 21:48:54 by jwe]
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217 {
10066
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218 frame.protect_var (indexed_object);
4256
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diff changeset
219
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diff changeset
220 indexed_object = object;
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221 }
4234
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222
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223 int len = length ();
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diff changeset
224
8580
188d38a553c7 further indexing optimization touches
Jaroslav Hajek <highegg@gmail.com>
parents: 8173
diff changeset
225 std::list<octave_value_list> args;
2982
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226
4219
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227 iterator p = begin ();
2982
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228 for (int k = 0; k < len; k++)
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diff changeset
229 {
4974
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230 if (stash_object)
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diff changeset
231 {
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diff changeset
232 frame.protect_var (index_position);
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diff changeset
233 frame.protect_var (num_indices);
4974
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diff changeset
234
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235 index_position = k;
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236 num_indices = len;
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diff changeset
237 }
4234
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238
4219
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diff changeset
239 tree_expression *elt = *p++;
2982
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240
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
241 if (elt)
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diff changeset
242 {
20622
128414587af2 don't print additional error message in argument list evaluation
John W. Eaton <jwe@octave.org>
parents: 20621
diff changeset
243 octave_value tmp = elt->rvalue1 ();
20621
22618d5fb6ad eliminate remaining uses of error_state in parse-tree files
John W. Eaton <jwe@octave.org>
parents: 20463
diff changeset
244
20622
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John W. Eaton <jwe@octave.org>
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diff changeset
245 if (tmp.is_cs_list ())
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diff changeset
246 args.push_back (tmp.list_value ());
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parents: 20621
diff changeset
247 else if (tmp.is_defined ())
128414587af2 don't print additional error message in argument list evaluation
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diff changeset
248 args.push_back (tmp);
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249 }
2982
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250 else
10315
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diff changeset
251 {
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diff changeset
252 args.push_back (octave_value ());
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diff changeset
253 break;
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diff changeset
254 }
2982
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
255 }
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diff changeset
256
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
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diff changeset
257 return args;
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
258 }
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diff changeset
259
5846
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diff changeset
260 std::list<octave_lvalue>
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jwe
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diff changeset
261 tree_argument_list::lvalue_list (void)
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diff changeset
262 {
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
263 std::list<octave_lvalue> retval;
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diff changeset
264
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
265 for (tree_argument_list::iterator p = begin ();
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diff changeset
266 p != end ();
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
jwe
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diff changeset
267 p++)
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
268 {
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
269 tree_expression *elt = *p;
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
270
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
271 retval.push_back (elt->lvalue ());
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diff changeset
272 }
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
273
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
274 return retval;
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
275 }
db0598f94c0f [project @ 2006-06-07 18:16:16 by jwe]
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diff changeset
276
2982
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diff changeset
277 string_vector
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
278 tree_argument_list::get_arg_names (void) const
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
279 {
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diff changeset
280 int len = length ();
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parents:
diff changeset
281
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
282 string_vector retval (len);
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
283
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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parents:
diff changeset
284 int k = 0;
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diff changeset
285
4219
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diff changeset
286 for (const_iterator p = begin (); p != end (); p++)
2982
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diff changeset
287 {
4219
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diff changeset
288 tree_expression *elt = *p;
2982
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diff changeset
289
2991
fc751d2a99fd [project @ 1997-05-16 21:00:48 by jwe]
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diff changeset
290 retval(k++) = elt->str_print_code ();
2982
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parents:
diff changeset
291 }
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jwe
parents:
diff changeset
292
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
293 return retval;
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
jwe
parents:
diff changeset
294 }
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diff changeset
295
16360
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
296 std::list<std::string>
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
297 tree_argument_list::variable_names (void) const
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diff changeset
298 {
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
299 std::list<std::string> retval;
11115c237231 recognize variables when parsing (bug #38576)
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diff changeset
300
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
301 for (const_iterator p = begin (); p != end (); p++)
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
302 {
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
diff changeset
303 tree_expression *elt = *p;
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diff changeset
304
11115c237231 recognize variables when parsing (bug #38576)
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parents: 16285
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305 if (elt->is_identifier ())
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306 {
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307 tree_identifier *id = dynamic_cast<tree_identifier *> (elt);
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308
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309 retval.push_back (id->name ());
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310 }
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311 else if (elt->is_index_expression ())
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312 {
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313 tree_index_expression *idx_expr
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314 = dynamic_cast<tree_index_expression *> (elt);
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315
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316 retval.push_back (idx_expr->name ());
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317 }
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318 }
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319
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320 return retval;
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321 }
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322
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323 tree_argument_list *
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324 tree_argument_list::dup (symbol_table::scope_id scope,
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325 symbol_table::context_id context) const
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326 {
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327 tree_argument_list *new_list = new tree_argument_list ();
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328
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329 new_list->list_includes_magic_end = list_includes_magic_end;
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330 new_list->simple_assign_lhs = simple_assign_lhs;
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331
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332 for (const_iterator p = begin (); p != end (); p++)
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333 {
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334 const tree_expression *elt = *p;
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335
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336 new_list->append (elt ? elt->dup (scope, context) : 0);
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337 }
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338
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339 return new_list;
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340 }
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341
2982
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342 void
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343 tree_argument_list::accept (tree_walker& tw)
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344 {
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345 tw.visit_argument_list (*this);
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346 }