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1 /* |
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2 |
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3 Copyright (C) 1996, 1997 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 2, or (at your option) any |
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10 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, write to the Free |
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19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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20 |
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21 */ |
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22 |
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23 #if defined (__GNUG__) && defined (USE_PRAGMA_INTERFACE_IMPLEMENTATION) |
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24 #pragma implementation |
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25 #endif |
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26 |
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27 #ifdef HAVE_CONFIG_H |
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28 #include <config.h> |
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29 #endif |
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30 |
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31 #include "error.h" |
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32 #include "input.h" |
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33 #include "ov-usr-fcn.h" |
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34 #include "pt-all.h" |
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35 |
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36 void |
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37 tree_checker::visit_argument_list (tree_argument_list& lst) |
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38 { |
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39 tree_argument_list::iterator p = lst.begin (); |
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40 |
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41 while (p != lst.end ()) |
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42 { |
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43 tree_expression *elt = *p++; |
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44 |
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45 if (elt) |
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46 { |
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47 if (do_lvalue_check && ! elt->lvalue_ok ()) |
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48 gripe ("invalid lvalue in multiple assignment", elt->line ()); |
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49 } |
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50 } |
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51 } |
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52 |
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53 void |
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54 tree_checker::visit_binary_expression (tree_binary_expression& expr) |
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55 { |
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56 tree_expression *op1 = expr.lhs (); |
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57 |
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58 if (op1) |
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59 op1->accept (*this); |
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60 |
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61 tree_expression *op2 = expr.rhs (); |
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62 |
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63 if (op2) |
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64 op2->accept (*this); |
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65 } |
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66 |
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67 void |
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68 tree_checker::visit_break_command (tree_break_command&) |
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69 { |
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70 } |
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71 |
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72 void |
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73 tree_checker::visit_colon_expression (tree_colon_expression& expr) |
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74 { |
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75 tree_expression *op1 = expr.base (); |
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76 |
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77 if (op1) |
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78 op1->accept (*this); |
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79 |
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80 tree_expression *op3 = expr.increment (); |
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81 |
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82 if (op3) |
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83 op3->accept (*this); |
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84 |
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85 tree_expression *op2 = expr.limit (); |
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86 |
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87 if (op2) |
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88 op2->accept (*this); |
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89 } |
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90 |
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91 void |
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92 tree_checker::visit_continue_command (tree_continue_command&) |
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93 { |
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94 } |
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95 |
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96 void |
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97 tree_checker::visit_decl_command (tree_decl_command& cmd) |
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98 { |
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99 tree_decl_init_list *init_list = cmd.initializer_list (); |
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100 |
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101 if (init_list) |
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102 init_list->accept (*this); |
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103 } |
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104 |
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105 void |
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106 tree_checker::visit_decl_elt (tree_decl_elt& cmd) |
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107 { |
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108 tree_identifier *id = cmd.ident (); |
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109 |
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110 if (id) |
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111 id->accept (*this); |
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112 |
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113 tree_expression *expr = cmd.expression (); |
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114 |
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115 if (expr) |
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116 expr->accept (*this); |
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117 } |
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118 |
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119 void |
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120 tree_checker::visit_decl_init_list (tree_decl_init_list& lst) |
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121 { |
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122 tree_decl_init_list::iterator p = lst.begin (); |
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123 |
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124 while (p != lst.end ()) |
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125 { |
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126 tree_decl_elt *elt = *p++; |
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127 |
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128 if (elt) |
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129 elt->accept (*this); |
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130 } |
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131 } |
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132 |
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133 void |
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134 tree_checker::visit_simple_for_command (tree_simple_for_command& cmd) |
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135 { |
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136 tree_expression *lhs = cmd.left_hand_side (); |
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137 |
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138 if (lhs) |
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139 { |
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140 if (! lhs->lvalue_ok ()) |
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141 gripe ("invalid lvalue in for command", cmd.line ()); |
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142 } |
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143 |
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144 tree_expression *expr = cmd.control_expr (); |
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145 |
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146 if (expr) |
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147 expr->accept (*this); |
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148 |
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149 tree_statement_list *list = cmd.body (); |
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150 |
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151 if (list) |
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152 list->accept (*this); |
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153 } |
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154 |
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155 void |
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156 tree_checker::visit_complex_for_command (tree_complex_for_command& cmd) |
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157 { |
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158 tree_argument_list *lhs = cmd.left_hand_side (); |
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159 |
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160 if (lhs) |
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161 { |
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162 int len = lhs->length (); |
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163 |
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164 if (len == 0 || len > 2) |
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165 gripe ("invalid number of output arguments in for command", |
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166 cmd.line ()); |
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167 |
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168 do_lvalue_check = true; |
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169 |
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170 lhs->accept (*this); |
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171 |
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172 do_lvalue_check = false; |
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173 } |
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174 |
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175 tree_expression *expr = cmd.control_expr (); |
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176 |
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177 if (expr) |
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178 expr->accept (*this); |
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179 |
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180 tree_statement_list *list = cmd.body (); |
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181 |
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182 if (list) |
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183 list->accept (*this); |
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184 } |
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185 |
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186 void |
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187 tree_checker::visit_octave_user_function (octave_user_function& fcn) |
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188 { |
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189 tree_statement_list *cmd_list = fcn.body (); |
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190 |
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191 if (cmd_list) |
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192 cmd_list->accept (*this); |
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193 } |
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194 |
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195 void |
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196 tree_checker::visit_identifier (tree_identifier& /* id */) |
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197 { |
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198 } |
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199 |
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200 void |
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201 tree_checker::visit_if_clause (tree_if_clause& cmd) |
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202 { |
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203 tree_expression *expr = cmd.condition (); |
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204 |
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205 if (expr) |
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206 expr->accept (*this); |
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207 |
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208 tree_statement_list *list = cmd.commands (); |
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209 |
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210 if (list) |
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211 list->accept (*this); |
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212 } |
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213 |
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214 void |
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215 tree_checker::visit_if_command (tree_if_command& cmd) |
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216 { |
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217 tree_if_command_list *list = cmd.cmd_list (); |
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218 |
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219 if (list) |
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220 list->accept (*this); |
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221 } |
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222 |
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223 void |
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224 tree_checker::visit_if_command_list (tree_if_command_list& lst) |
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225 { |
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226 tree_if_command_list::iterator p = lst.begin (); |
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227 |
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228 while (p != lst.end ()) |
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229 { |
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230 tree_if_clause *elt = *p++; |
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231 |
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232 if (elt) |
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233 elt->accept (*this); |
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234 } |
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235 } |
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236 |
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237 void |
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238 tree_checker::visit_index_expression (tree_index_expression& expr) |
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239 { |
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240 tree_expression *e = expr.expression (); |
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241 |
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242 if (e) |
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243 e->accept (*this); |
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244 |
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245 std::list<tree_argument_list *> lst = expr.arg_lists (); |
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246 |
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247 std::list<tree_argument_list *>::iterator p = lst.begin (); |
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248 |
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249 while (p != lst.end ()) |
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250 { |
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251 tree_argument_list *elt = *p++; |
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252 |
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253 if (elt) |
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254 elt->accept (*this); |
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255 } |
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256 } |
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257 |
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258 void |
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259 tree_checker::visit_matrix (tree_matrix& lst) |
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260 { |
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261 tree_matrix::iterator p = lst.begin (); |
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262 |
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263 while (p != lst.end ()) |
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264 { |
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265 tree_argument_list *elt = *p++; |
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266 |
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267 if (elt) |
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268 elt->accept (*this); |
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269 } |
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270 } |
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271 |
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272 void |
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273 tree_checker::visit_cell (tree_cell& lst) |
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274 { |
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275 tree_matrix::iterator p = lst.begin (); |
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276 |
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277 while (p != lst.end ()) |
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278 { |
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279 tree_argument_list *elt = *p++; |
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280 |
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281 if (elt) |
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282 elt->accept (*this); |
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283 } |
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284 } |
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285 |
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286 void |
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287 tree_checker::visit_multi_assignment (tree_multi_assignment& expr) |
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288 { |
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289 tree_argument_list *lhs = expr.left_hand_side (); |
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290 |
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291 if (lhs) |
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292 { |
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293 do_lvalue_check = true; |
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294 |
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295 lhs->accept (*this); |
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296 |
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297 do_lvalue_check = false; |
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298 } |
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299 |
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300 tree_expression *rhs = expr.right_hand_side (); |
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301 |
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302 if (rhs) |
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303 rhs->accept (*this); |
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304 } |
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305 |
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306 void |
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307 tree_checker::visit_no_op_command (tree_no_op_command& /* cmd */) |
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308 { |
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309 } |
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310 |
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311 void |
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312 tree_checker::visit_constant (tree_constant& /* val */) |
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313 { |
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314 } |
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315 |
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316 void |
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317 tree_checker::visit_fcn_handle (tree_fcn_handle& /* fh */) |
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318 { |
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319 } |
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320 |
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321 void |
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322 tree_checker::visit_parameter_list (tree_parameter_list& lst) |
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323 { |
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324 tree_parameter_list::iterator p = lst.begin (); |
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325 |
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326 while (p != lst.end ()) |
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327 { |
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328 tree_identifier *elt = *p++; |
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329 |
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330 if (elt) |
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331 elt->accept (*this); |
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332 } |
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333 } |
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334 |
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335 void |
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336 tree_checker::visit_postfix_expression (tree_postfix_expression& expr) |
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337 { |
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338 tree_expression *e = expr.operand (); |
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339 |
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340 if (e) |
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341 e->accept (*this); |
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342 } |
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343 |
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344 void |
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345 tree_checker::visit_prefix_expression (tree_prefix_expression& expr) |
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346 { |
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347 tree_expression *e = expr.operand (); |
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348 |
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349 if (e) |
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350 e->accept (*this); |
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351 } |
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352 |
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353 void |
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354 tree_checker::visit_return_command (tree_return_command&) |
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355 { |
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356 } |
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357 |
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358 void |
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359 tree_checker::visit_return_list (tree_return_list& lst) |
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360 { |
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361 tree_return_list::iterator p = lst.begin (); |
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362 |
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363 while (p != lst.end ()) |
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364 { |
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365 tree_index_expression *elt = *p++; |
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366 |
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367 if (elt) |
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368 elt->accept (*this); |
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369 } |
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370 } |
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371 |
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372 void |
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373 tree_checker::visit_simple_assignment (tree_simple_assignment& expr) |
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374 { |
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375 tree_expression *lhs = expr.left_hand_side (); |
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376 |
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377 if (lhs) |
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378 { |
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379 if (! lhs->lvalue_ok ()) |
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380 gripe ("invalid lvalue in assignment", expr.line ()); |
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381 } |
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382 |
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383 tree_expression *rhs = expr.right_hand_side (); |
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384 |
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385 if (rhs) |
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386 rhs->accept (*this); |
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387 } |
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388 |
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389 void |
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390 tree_checker::visit_statement (tree_statement& stmt) |
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391 { |
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392 tree_command *cmd = stmt.command (); |
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393 |
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394 if (cmd) |
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395 cmd->accept (*this); |
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396 else |
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397 { |
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398 tree_expression *expr = stmt.expression (); |
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399 |
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400 if (expr) |
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401 expr->accept (*this); |
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402 } |
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403 } |
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404 |
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405 void |
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406 tree_checker::visit_statement_list (tree_statement_list& lst) |
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407 { |
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408 for (tree_statement_list::iterator p = lst.begin (); p != lst.end (); p++) |
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409 { |
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410 tree_statement *elt = *p; |
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411 |
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412 if (elt) |
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413 elt->accept (*this); |
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414 } |
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415 } |
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416 |
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417 void |
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418 tree_checker::visit_switch_case (tree_switch_case& cs) |
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419 { |
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420 tree_expression *label = cs.case_label (); |
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421 |
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422 if (label) |
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423 label->accept (*this); |
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424 |
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425 tree_statement_list *list = cs.commands (); |
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426 |
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427 if (list) |
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428 list->accept (*this); |
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429 } |
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430 |
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431 void |
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432 tree_checker::visit_switch_case_list (tree_switch_case_list& lst) |
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433 { |
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434 tree_switch_case_list::iterator p = lst.begin (); |
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435 |
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436 while (p != lst.end ()) |
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437 { |
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438 tree_switch_case *elt = *p++; |
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439 |
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440 if (elt) |
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441 elt->accept (*this); |
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442 } |
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443 } |
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444 |
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445 void |
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446 tree_checker::visit_switch_command (tree_switch_command& cmd) |
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447 { |
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448 tree_expression *expr = cmd.switch_value (); |
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449 |
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450 if (expr) |
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451 expr->accept (*this); |
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452 |
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453 tree_switch_case_list *list = cmd.case_list (); |
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454 |
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455 if (list) |
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456 list->accept (*this); |
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457 } |
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458 |
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459 void |
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460 tree_checker::visit_try_catch_command (tree_try_catch_command& cmd) |
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461 { |
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462 tree_statement_list *try_code = cmd.body (); |
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463 |
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464 if (try_code) |
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465 try_code->accept (*this); |
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466 |
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467 tree_statement_list *catch_code = cmd.cleanup (); |
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468 |
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469 if (catch_code) |
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470 catch_code->accept (*this); |
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471 } |
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472 |
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473 void |
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474 tree_checker::visit_unwind_protect_command |
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475 (tree_unwind_protect_command& cmd) |
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476 { |
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477 tree_statement_list *unwind_protect_code = cmd.body (); |
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478 |
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479 if (unwind_protect_code) |
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480 unwind_protect_code->accept (*this); |
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481 |
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482 tree_statement_list *cleanup_code = cmd.cleanup (); |
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483 |
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484 if (cleanup_code) |
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485 cleanup_code->accept (*this); |
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486 } |
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487 |
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488 void |
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489 tree_checker::visit_while_command (tree_while_command& cmd) |
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490 { |
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491 tree_expression *expr = cmd.condition (); |
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492 |
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493 if (expr) |
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494 expr->accept (*this); |
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495 |
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496 tree_statement_list *list = cmd.body (); |
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497 |
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498 if (list) |
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499 list->accept (*this); |
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500 } |
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501 |
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502 void |
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4229
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503 tree_checker::visit_do_until_command (tree_do_until_command& cmd) |
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504 { |
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505 tree_statement_list *list = cmd.body (); |
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506 |
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507 if (list) |
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508 list->accept (*this); |
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509 |
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510 tree_expression *expr = cmd.condition (); |
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511 |
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512 if (expr) |
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513 expr->accept (*this); |
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514 } |
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515 |
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516 void |
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3523
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517 tree_checker::gripe (const std::string& msg, int line) |
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3011
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518 { |
|
|
519 if (curr_fcn_file_name.empty ()) |
|
|
520 error ("%s", msg.c_str ()); |
|
|
521 else |
|
|
522 error ("%s: %d: %s", curr_fcn_file_name.c_str (), line, msg.c_str ()); |
|
|
523 } |
|
|
524 |
|
|
525 /* |
|
|
526 ;;; Local Variables: *** |
|
|
527 ;;; mode: C++ *** |
|
|
528 ;;; End: *** |
|
|
529 */ |
