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1 /* |
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2 |
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3 Copyright (C) 1996, 1997, 2000, 2002, 2003, 2004, 2005, 2006, 2007 |
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4 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 "error.h" |
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29 #include "input.h" |
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30 #include "ov-usr-fcn.h" |
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31 #include "pt-all.h" |
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32 |
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33 void |
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34 tree_checker::visit_argument_list (tree_argument_list& lst) |
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35 { |
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36 tree_argument_list::iterator p = lst.begin (); |
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37 |
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38 while (p != lst.end ()) |
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39 { |
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40 tree_expression *elt = *p++; |
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41 |
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42 if (elt) |
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43 { |
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44 if (do_lvalue_check && ! elt->lvalue_ok ()) |
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45 gripe ("invalid lvalue in multiple assignment", elt->line ()); |
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46 } |
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47 } |
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48 } |
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49 |
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50 void |
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51 tree_checker::visit_binary_expression (tree_binary_expression& expr) |
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52 { |
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53 tree_expression *op1 = expr.lhs (); |
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54 |
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55 if (op1) |
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56 op1->accept (*this); |
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57 |
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58 tree_expression *op2 = expr.rhs (); |
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59 |
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60 if (op2) |
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61 op2->accept (*this); |
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62 } |
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63 |
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64 void |
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65 tree_checker::visit_break_command (tree_break_command&) |
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66 { |
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67 } |
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68 |
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69 void |
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70 tree_checker::visit_colon_expression (tree_colon_expression& expr) |
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71 { |
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72 tree_expression *op1 = expr.base (); |
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73 |
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74 if (op1) |
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75 op1->accept (*this); |
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76 |
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77 tree_expression *op3 = expr.increment (); |
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78 |
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79 if (op3) |
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80 op3->accept (*this); |
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81 |
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82 tree_expression *op2 = expr.limit (); |
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83 |
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84 if (op2) |
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85 op2->accept (*this); |
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86 } |
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87 |
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88 void |
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89 tree_checker::visit_continue_command (tree_continue_command&) |
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90 { |
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91 } |
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92 |
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93 void |
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94 tree_checker::visit_decl_command (tree_decl_command& cmd) |
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95 { |
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96 tree_decl_init_list *init_list = cmd.initializer_list (); |
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97 |
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98 if (init_list) |
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99 init_list->accept (*this); |
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100 } |
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101 |
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102 void |
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103 tree_checker::visit_decl_elt (tree_decl_elt& cmd) |
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104 { |
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105 tree_identifier *id = cmd.ident (); |
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106 |
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107 if (id) |
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108 id->accept (*this); |
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109 |
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110 tree_expression *expr = cmd.expression (); |
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111 |
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112 if (expr) |
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113 expr->accept (*this); |
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114 } |
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115 |
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116 void |
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117 tree_checker::visit_decl_init_list (tree_decl_init_list& lst) |
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118 { |
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119 tree_decl_init_list::iterator p = lst.begin (); |
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120 |
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121 while (p != lst.end ()) |
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122 { |
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123 tree_decl_elt *elt = *p++; |
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124 |
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125 if (elt) |
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126 elt->accept (*this); |
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127 } |
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128 } |
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129 |
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130 void |
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131 tree_checker::visit_simple_for_command (tree_simple_for_command& cmd) |
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132 { |
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133 tree_expression *lhs = cmd.left_hand_side (); |
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134 |
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135 if (lhs) |
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136 { |
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137 if (! lhs->lvalue_ok ()) |
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138 gripe ("invalid lvalue in for command", cmd.line ()); |
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139 } |
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140 |
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141 tree_expression *expr = cmd.control_expr (); |
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142 |
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143 if (expr) |
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144 expr->accept (*this); |
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145 |
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146 tree_statement_list *list = cmd.body (); |
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147 |
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148 if (list) |
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149 list->accept (*this); |
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150 } |
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151 |
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152 void |
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153 tree_checker::visit_complex_for_command (tree_complex_for_command& cmd) |
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154 { |
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155 tree_argument_list *lhs = cmd.left_hand_side (); |
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156 |
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157 if (lhs) |
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158 { |
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159 int len = lhs->length (); |
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160 |
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161 if (len == 0 || len > 2) |
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162 gripe ("invalid number of output arguments in for command", |
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163 cmd.line ()); |
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164 |
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165 do_lvalue_check = true; |
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166 |
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167 lhs->accept (*this); |
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168 |
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169 do_lvalue_check = false; |
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170 } |
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171 |
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172 tree_expression *expr = cmd.control_expr (); |
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173 |
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174 if (expr) |
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175 expr->accept (*this); |
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176 |
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177 tree_statement_list *list = cmd.body (); |
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178 |
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179 if (list) |
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180 list->accept (*this); |
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181 } |
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182 |
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183 void |
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184 tree_checker::visit_octave_user_function (octave_user_function& fcn) |
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185 { |
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186 tree_statement_list *cmd_list = fcn.body (); |
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187 |
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188 if (cmd_list) |
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189 cmd_list->accept (*this); |
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190 } |
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191 |
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192 void |
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193 tree_checker::visit_identifier (tree_identifier& /* id */) |
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194 { |
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195 } |
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196 |
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197 void |
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198 tree_checker::visit_if_clause (tree_if_clause& cmd) |
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199 { |
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200 tree_expression *expr = cmd.condition (); |
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201 |
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202 if (expr) |
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203 expr->accept (*this); |
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204 |
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205 tree_statement_list *list = cmd.commands (); |
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206 |
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207 if (list) |
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208 list->accept (*this); |
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209 } |
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210 |
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211 void |
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212 tree_checker::visit_if_command (tree_if_command& cmd) |
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213 { |
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214 tree_if_command_list *list = cmd.cmd_list (); |
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215 |
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216 if (list) |
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217 list->accept (*this); |
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218 } |
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219 |
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220 void |
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221 tree_checker::visit_if_command_list (tree_if_command_list& lst) |
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222 { |
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223 tree_if_command_list::iterator p = lst.begin (); |
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224 |
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225 while (p != lst.end ()) |
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226 { |
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227 tree_if_clause *elt = *p++; |
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228 |
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229 if (elt) |
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230 elt->accept (*this); |
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231 } |
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232 } |
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233 |
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234 void |
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235 tree_checker::visit_index_expression (tree_index_expression& expr) |
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236 { |
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237 tree_expression *e = expr.expression (); |
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238 |
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239 if (e) |
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240 e->accept (*this); |
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241 |
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242 std::list<tree_argument_list *> lst = expr.arg_lists (); |
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243 |
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244 std::list<tree_argument_list *>::iterator p = lst.begin (); |
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245 |
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246 while (p != lst.end ()) |
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247 { |
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248 tree_argument_list *elt = *p++; |
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249 |
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250 if (elt) |
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251 elt->accept (*this); |
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252 } |
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253 } |
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254 |
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255 void |
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256 tree_checker::visit_matrix (tree_matrix& lst) |
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257 { |
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258 tree_matrix::iterator p = lst.begin (); |
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259 |
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260 while (p != lst.end ()) |
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261 { |
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262 tree_argument_list *elt = *p++; |
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263 |
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264 if (elt) |
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265 elt->accept (*this); |
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266 } |
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267 } |
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268 |
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269 void |
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270 tree_checker::visit_cell (tree_cell& lst) |
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271 { |
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272 tree_matrix::iterator p = lst.begin (); |
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273 |
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274 while (p != lst.end ()) |
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275 { |
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276 tree_argument_list *elt = *p++; |
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277 |
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278 if (elt) |
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279 elt->accept (*this); |
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280 } |
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281 } |
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282 |
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283 void |
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284 tree_checker::visit_multi_assignment (tree_multi_assignment& expr) |
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285 { |
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286 tree_argument_list *lhs = expr.left_hand_side (); |
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287 |
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288 if (lhs) |
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289 { |
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290 do_lvalue_check = true; |
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291 |
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292 lhs->accept (*this); |
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293 |
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294 do_lvalue_check = false; |
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295 } |
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296 |
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297 tree_expression *rhs = expr.right_hand_side (); |
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298 |
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299 if (rhs) |
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300 rhs->accept (*this); |
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301 } |
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302 |
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303 void |
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304 tree_checker::visit_no_op_command (tree_no_op_command& /* cmd */) |
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305 { |
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306 } |
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307 |
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308 void |
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309 tree_checker::visit_anon_fcn_handle (tree_anon_fcn_handle& /* afh */) |
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310 { |
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311 } |
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312 |
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313 void |
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314 tree_checker::visit_constant (tree_constant& /* val */) |
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315 { |
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316 } |
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317 |
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318 void |
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319 tree_checker::visit_fcn_handle (tree_fcn_handle& /* fh */) |
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320 { |
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321 } |
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322 |
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323 void |
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324 tree_checker::visit_parameter_list (tree_parameter_list& lst) |
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325 { |
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326 tree_parameter_list::iterator p = lst.begin (); |
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327 |
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328 while (p != lst.end ()) |
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329 { |
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330 tree_decl_elt *elt = *p++; |
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331 |
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332 if (elt) |
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333 elt->accept (*this); |
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334 } |
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335 } |
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336 |
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337 void |
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338 tree_checker::visit_postfix_expression (tree_postfix_expression& expr) |
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339 { |
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340 tree_expression *e = expr.operand (); |
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341 |
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342 if (e) |
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343 e->accept (*this); |
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344 } |
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345 |
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346 void |
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347 tree_checker::visit_prefix_expression (tree_prefix_expression& expr) |
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348 { |
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349 tree_expression *e = expr.operand (); |
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350 |
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351 if (e) |
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352 e->accept (*this); |
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353 } |
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354 |
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355 void |
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356 tree_checker::visit_return_command (tree_return_command&) |
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357 { |
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358 } |
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359 |
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360 void |
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361 tree_checker::visit_return_list (tree_return_list& lst) |
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362 { |
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363 tree_return_list::iterator p = lst.begin (); |
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364 |
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365 while (p != lst.end ()) |
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366 { |
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367 tree_index_expression *elt = *p++; |
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368 |
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369 if (elt) |
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370 elt->accept (*this); |
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371 } |
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372 } |
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373 |
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374 void |
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375 tree_checker::visit_simple_assignment (tree_simple_assignment& expr) |
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376 { |
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377 tree_expression *lhs = expr.left_hand_side (); |
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378 |
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379 if (lhs) |
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380 { |
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381 if (! lhs->lvalue_ok ()) |
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382 gripe ("invalid lvalue in assignment", expr.line ()); |
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383 } |
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384 |
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385 tree_expression *rhs = expr.right_hand_side (); |
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386 |
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387 if (rhs) |
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388 rhs->accept (*this); |
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389 } |
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390 |
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391 void |
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392 tree_checker::visit_statement (tree_statement& stmt) |
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393 { |
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394 tree_command *cmd = stmt.command (); |
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395 |
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396 if (cmd) |
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397 cmd->accept (*this); |
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398 else |
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399 { |
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400 tree_expression *expr = stmt.expression (); |
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401 |
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402 if (expr) |
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403 expr->accept (*this); |
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404 } |
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405 } |
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406 |
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407 void |
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408 tree_checker::visit_statement_list (tree_statement_list& lst) |
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409 { |
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410 for (tree_statement_list::iterator p = lst.begin (); p != lst.end (); p++) |
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411 { |
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412 tree_statement *elt = *p; |
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413 |
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414 if (elt) |
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415 elt->accept (*this); |
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416 } |
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417 } |
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418 |
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419 void |
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420 tree_checker::visit_switch_case (tree_switch_case& cs) |
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421 { |
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422 tree_expression *label = cs.case_label (); |
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423 |
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424 if (label) |
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425 label->accept (*this); |
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426 |
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427 tree_statement_list *list = cs.commands (); |
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428 |
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429 if (list) |
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430 list->accept (*this); |
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431 } |
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432 |
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433 void |
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434 tree_checker::visit_switch_case_list (tree_switch_case_list& lst) |
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435 { |
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436 tree_switch_case_list::iterator p = lst.begin (); |
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437 |
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438 while (p != lst.end ()) |
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439 { |
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440 tree_switch_case *elt = *p++; |
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441 |
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442 if (elt) |
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443 elt->accept (*this); |
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444 } |
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445 } |
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446 |
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447 void |
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448 tree_checker::visit_switch_command (tree_switch_command& cmd) |
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449 { |
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450 tree_expression *expr = cmd.switch_value (); |
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451 |
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452 if (expr) |
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453 expr->accept (*this); |
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454 |
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455 tree_switch_case_list *list = cmd.case_list (); |
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456 |
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457 if (list) |
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458 list->accept (*this); |
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459 } |
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460 |
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461 void |
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462 tree_checker::visit_try_catch_command (tree_try_catch_command& cmd) |
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463 { |
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464 tree_statement_list *try_code = cmd.body (); |
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465 |
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466 if (try_code) |
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467 try_code->accept (*this); |
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468 |
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469 tree_statement_list *catch_code = cmd.cleanup (); |
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470 |
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471 if (catch_code) |
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472 catch_code->accept (*this); |
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473 } |
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474 |
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475 void |
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476 tree_checker::visit_unwind_protect_command |
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477 (tree_unwind_protect_command& cmd) |
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478 { |
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479 tree_statement_list *unwind_protect_code = cmd.body (); |
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480 |
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481 if (unwind_protect_code) |
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482 unwind_protect_code->accept (*this); |
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483 |
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484 tree_statement_list *cleanup_code = cmd.cleanup (); |
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485 |
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486 if (cleanup_code) |
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487 cleanup_code->accept (*this); |
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488 } |
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489 |
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490 void |
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491 tree_checker::visit_while_command (tree_while_command& cmd) |
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492 { |
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493 tree_expression *expr = cmd.condition (); |
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494 |
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495 if (expr) |
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496 expr->accept (*this); |
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497 |
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498 tree_statement_list *list = cmd.body (); |
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499 |
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500 if (list) |
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501 list->accept (*this); |
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502 } |
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503 |
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504 void |
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4229
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505 tree_checker::visit_do_until_command (tree_do_until_command& cmd) |
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506 { |
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507 tree_statement_list *list = cmd.body (); |
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508 |
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509 if (list) |
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510 list->accept (*this); |
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511 |
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512 tree_expression *expr = cmd.condition (); |
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513 |
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514 if (expr) |
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515 expr->accept (*this); |
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516 } |
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517 |
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518 void |
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3523
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519 tree_checker::gripe (const std::string& msg, int line) |
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3011
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520 { |
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521 if (curr_fcn_file_name.empty ()) |
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522 error ("%s", msg.c_str ()); |
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523 else |
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524 error ("%s: %d: %s", curr_fcn_file_name.c_str (), line, msg.c_str ()); |
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525 } |
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526 |
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527 /* |
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528 ;;; Local Variables: *** |
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529 ;;; mode: C++ *** |
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530 ;;; End: *** |
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531 */ |
