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annotate src/pt-arg-list.cc @ 10884:cc2bc3f46cd4

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fix assignment bug with lazy indices
author Jaroslav Hajek <highegg@gmail.com>
date Wed, 11 Aug 2010 10:55:31 +0200
parents 57a59eae83cc
children fd0a3ac60b0e
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, 1997, 1998, 2000, 2002, 2003, 2004, 2005, 2006,
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4 2007, 2008, 2009 John W. Eaton
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5
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6 This file is part of Octave.
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7
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8 Octave is free software; you can redistribute it and/or modify it
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9 under the terms of the GNU General Public License as published by the
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10 Free Software Foundation; either version 3 of the License, or (at your
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11 option) any later version.
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12
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13 Octave is distributed in the hope that it will be useful, but WITHOUT
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14 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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16 for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with Octave; see the file COPYING. If not, see
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20 <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24 #ifdef HAVE_CONFIG_H
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25 #include <config.h>
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26 #endif
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27
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28 #include <iostream>
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29 #include <string>
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30
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31 #include "str-vec.h"
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32
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33 #include "defun.h"
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34 #include "error.h"
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35 #include "oct-lvalue.h"
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36 #include "oct-obj.h"
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37 #include "ov.h"
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38 #include "ov-usr-fcn.h"
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39 #include "parse.h"
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40 #include "pt-arg-list.h"
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41 #include "pt-exp.h"
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42 #include "pt-id.h"
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43 #include "pt-pr-code.h"
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44 #include "pt-walk.h"
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45 #include "toplev.h"
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46 #include "unwind-prot.h"
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47
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48 // Argument lists.
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49
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50 tree_argument_list::~tree_argument_list (void)
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51 {
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52 while (! empty ())
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53 {
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54 iterator p = begin ();
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55 delete *p;
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56 erase (p);
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57 }
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58 }
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59
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60 bool
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61 tree_argument_list::has_magic_end (void) const
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62 {
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63 for (const_iterator p = begin (); p != end (); p++)
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64 {
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65 tree_expression *elt = *p;
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66
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67 if (elt && elt->has_magic_end ())
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68 return true;
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69 }
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70
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71 return false;
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72 }
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73
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74 void
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75 tree_argument_list::append (const element_type& s)
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76 {
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77 octave_base_list<tree_expression *>::append (s);
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78
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79 if (! list_includes_magic_end && s && s->has_magic_end ())
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80 list_includes_magic_end = true;
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81
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82 if (! list_includes_magic_tilde && s && s->is_identifier ())
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83 {
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84 tree_identifier *id = dynamic_cast<tree_identifier *> (s);
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85 list_includes_magic_tilde = id && id->is_black_hole ();
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86 }
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87 }
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88
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89 bool
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90 tree_argument_list::all_elements_are_constant (void) const
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91 {
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92 for (const_iterator p = begin (); p != end (); p++)
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93 {
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94 tree_expression *elt = *p;
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95
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96 if (! elt->is_constant ())
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97 return false;
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98 }
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99
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100 return true;
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101 }
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102
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103 static const octave_value *indexed_object = 0;
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104 static int index_position = 0;
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105 static int num_indices = 0;
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106
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107 DEFCONSTFUN (__end__, , ,
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108 "internal function")
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109 {
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110 octave_value retval;
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111
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112 if (indexed_object)
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113 {
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114 if (indexed_object->is_object ())
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115 {
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116 octave_value_list args;
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117
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118 args(2) = num_indices;
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119 args(1) = index_position + 1;
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120 args(0) = *indexed_object;
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121
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122 std::string class_name = indexed_object->class_name ();
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123
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124 octave_value meth = symbol_table::find_method ("end", class_name);
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125
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126 if (meth.is_defined ())
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127 return feval (meth.function_value (), args, 1);
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128 }
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129
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130 dim_vector dv = indexed_object->dims ();
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131 int ndims = dv.length ();
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132
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133 if (num_indices < ndims)
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134 {
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135 for (int i = num_indices; i < ndims; i++)
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136 dv(num_indices-1) *= dv(i);
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137
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138 if (num_indices == 1)
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139 {
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140 ndims = 2;
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141 dv.resize (ndims);
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142 dv(1) = 1;
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143 }
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144 else
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145 {
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146 ndims = num_indices;
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147 dv.resize (ndims);
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148 }
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149 }
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150
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7c020c067a60 F__end__: correctly handle fewer indices than dimensions
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151 if (index_position < ndims)
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152 retval = dv(index_position);
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153 else
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154 retval = 1;
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155 }
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156 else
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157 ::error ("invalid use of end");
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158
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159 return retval;
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160 }
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161
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162 octave_value_list
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163 tree_argument_list::convert_to_const_vector (const octave_value *object)
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164 {
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165 // END doesn't make sense for functions. Maybe we need a different
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166 // way of asking an octave_value object this question?
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167
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168 bool stash_object = (list_includes_magic_end
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169 && object
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170 && ! (object->is_function ()
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171 || object->is_function_handle ()));
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172
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173 unwind_protect frame;
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174
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175 if (stash_object)
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176 {
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177 frame.protect_var (indexed_object);
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178
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179 indexed_object = object;
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180 }
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181
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182 int len = length ();
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183
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184 std::list<octave_value_list> args;
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185
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186 iterator p = begin ();
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187 for (int k = 0; k < len; k++)
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188 {
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189 if (stash_object)
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190 {
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191 frame.protect_var (index_position);
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192 frame.protect_var (num_indices);
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193
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194 index_position = k;
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195 num_indices = len;
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196 }
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197
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198 tree_expression *elt = *p++;
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199
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200 if (elt)
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201 {
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202 octave_value tmp = elt->rvalue1 ();
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203
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diff changeset
204 if (error_state)
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205 {
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206 ::error ("evaluating argument list element number %d", k+1);
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207 args.clear ();
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208 break;
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209 }
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210 else
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211 {
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212 if (tmp.is_cs_list ())
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213 args.push_back (tmp.list_value ());
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214 else if (tmp.is_defined ())
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215 args.push_back (tmp);
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216 }
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217 }
2982
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218 else
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219 {
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220 args.push_back (octave_value ());
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221 break;
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diff changeset
222 }
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223 }
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224
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225 return args;
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226 }
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227
5846
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diff changeset
228 std::list<octave_lvalue>
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229 tree_argument_list::lvalue_list (void)
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230 {
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diff changeset
231 std::list<octave_lvalue> retval;
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diff changeset
232
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diff changeset
233 for (tree_argument_list::iterator p = begin ();
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234 p != end ();
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235 p++)
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diff changeset
236 {
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diff changeset
237 tree_expression *elt = *p;
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238
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diff changeset
239 retval.push_back (elt->lvalue ());
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240 }
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241
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242 return retval;
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diff changeset
243 }
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244
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diff changeset
245 string_vector
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246 tree_argument_list::get_arg_names (void) const
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diff changeset
247 {
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diff changeset
248 int len = length ();
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diff changeset
249
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diff changeset
250 string_vector retval (len);
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diff changeset
251
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diff changeset
252 int k = 0;
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253
4219
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diff changeset
254 for (const_iterator p = begin (); p != end (); p++)
2982
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diff changeset
255 {
4219
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diff changeset
256 tree_expression *elt = *p;
2982
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diff changeset
257
2991
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diff changeset
258 retval(k++) = elt->str_print_code ();
2982
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parents:
diff changeset
259 }
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diff changeset
260
20f5cec4f11c [project @ 1997-05-16 03:29:26 by jwe]
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diff changeset
261 return retval;
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parents:
diff changeset
262 }
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diff changeset
263
5861
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diff changeset
264 tree_argument_list *
7767
71f068b22fcc scope and context fixes for function handles
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diff changeset
265 tree_argument_list::dup (symbol_table::scope_id scope,
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diff changeset
266 symbol_table::context_id context) const
5861
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diff changeset
267 {
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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diff changeset
268 tree_argument_list *new_list = new tree_argument_list ();
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diff changeset
269
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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diff changeset
270 new_list->list_includes_magic_end = list_includes_magic_end;
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diff changeset
271 new_list->simple_assign_lhs = simple_assign_lhs;
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diff changeset
272
8913
35cd375d4bb3 make tree::dup functions const
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diff changeset
273 for (const_iterator p = begin (); p != end (); p++)
5861
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diff changeset
274 {
8913
35cd375d4bb3 make tree::dup functions const
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diff changeset
275 const tree_expression *elt = *p;
5861
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276
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diff changeset
277 new_list->append (elt ? elt->dup (scope, context) : 0);
5861
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diff changeset
278 }
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diff changeset
279
2a6cb4ed8f1e [project @ 2006-06-16 05:09:41 by jwe]
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diff changeset
280 return new_list;
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diff changeset
281 }
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diff changeset
282
2982
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diff changeset
283 void
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diff changeset
284 tree_argument_list::accept (tree_walker& tw)
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diff changeset
285 {
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diff changeset
286 tw.visit_argument_list (*this);
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diff changeset
287 }