1 /* |
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2 * matiec - a compiler for the programming languages defined in IEC 61131-3 |
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3 * |
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4 * Copyright (C) 2009-2011 Mario de Sousa (msousa@fe.up.pt) |
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5 * Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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6 * |
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7 * This program is free software: you can redistribute it and/or modify |
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8 * it under the terms of the GNU General Public License as published by |
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9 * the Free Software Foundation, either version 3 of the License, or |
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10 * (at your option) any later version. |
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11 * |
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12 * This program is distributed in the hope that it will be useful, |
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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15 * GNU General Public License 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 this program. If not, see <http://www.gnu.org/licenses/>. |
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19 * |
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20 * |
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21 * This code is made available on the understanding that it will not be |
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22 * used in safety-critical situations without a full and competent review. |
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23 */ |
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24 |
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25 /* |
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26 * An IEC 61131-3 compiler. |
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27 * |
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28 * Based on the |
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29 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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30 * |
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31 */ |
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32 |
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33 |
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34 /* Verify whether the semantic rules of data type compatibility are being followed. |
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35 * |
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36 * For example: |
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37 */ |
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38 |
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39 #include "visit_expression_type.hh" |
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40 #include <typeinfo> |
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41 #include <list> |
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42 #include <string> |
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43 #include <string.h> |
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44 #include <strings.h> |
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45 |
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46 |
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47 #define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order) ? (symbol1) : (symbol2)) |
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48 #define LAST_(symbol1, symbol2) (((symbol1)->last_order > (symbol2)->last_order) ? (symbol1) : (symbol2)) |
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49 |
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50 #define STAGE3_ERROR(symbol1, symbol2, ...) { \ |
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51 fprintf(stderr, "%s:%d-%d..%d-%d: error : ", \ |
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52 FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column, \ |
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53 LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column); \ |
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54 fprintf(stderr, __VA_ARGS__); \ |
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55 fprintf(stderr, "\n"); \ |
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56 il_error = true; \ |
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57 error_found = true; \ |
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58 } |
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59 |
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60 |
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61 /* set to 1 to see debug info during execution */ |
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62 static int debug = 0; |
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63 |
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64 |
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65 void *visit_expression_type_c::visit(program_declaration_c *symbol) { |
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66 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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67 symbol->var_declarations->accept(*this); |
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68 if (debug) printf("checking semantics in body of program %s\n", ((token_c *)(symbol->program_type_name))->value); |
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69 il_parenthesis_level = 0; |
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70 il_error = false; |
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71 il_default_variable_type = NULL; |
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72 symbol->function_block_body->accept(*this); |
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73 il_default_variable_type = NULL; |
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74 delete search_varfb_instance_type; |
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75 search_varfb_instance_type = NULL; |
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76 return NULL; |
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77 } |
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78 |
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79 void *visit_expression_type_c::visit(function_declaration_c *symbol) { |
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80 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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81 symbol->var_declarations_list->accept(*this); |
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82 if (debug) printf("checking semantics in body of function %s\n", ((token_c *)(symbol->derived_function_name))->value); |
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83 il_parenthesis_level = 0; |
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84 il_error = false; |
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85 il_default_variable_type = NULL; |
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86 symbol->function_body->accept(*this); |
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87 il_default_variable_type = NULL; |
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88 delete search_varfb_instance_type; |
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89 search_varfb_instance_type = NULL; |
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90 return NULL; |
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91 } |
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92 |
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93 void *visit_expression_type_c::visit(function_block_declaration_c *symbol) { |
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94 search_varfb_instance_type = new search_varfb_instance_type_c(symbol); |
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95 symbol->var_declarations->accept(*this); |
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96 if (debug) printf("checking semantics in body of FB %s\n", ((token_c *)(symbol->fblock_name))->value); |
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97 il_parenthesis_level = 0; |
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98 il_error = false; |
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99 il_default_variable_type = NULL; |
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100 symbol->fblock_body->accept(*this); |
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101 il_default_variable_type = NULL; |
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102 delete search_varfb_instance_type; |
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103 search_varfb_instance_type = NULL; |
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104 return NULL; |
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105 } |
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106 |
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107 |
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108 |
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109 |
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110 |
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111 |
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112 |
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113 |
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114 |
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115 visit_expression_type_c::visit_expression_type_c(symbol_c *ignore) { |
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116 error_found = false; |
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117 } |
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118 |
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119 visit_expression_type_c::~visit_expression_type_c(void) { |
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120 } |
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121 |
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122 bool visit_expression_type_c::get_error_found(void) { |
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123 return error_found; |
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124 } |
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125 |
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126 |
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127 |
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128 /* NOTE on data type handling and literals... |
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129 * ========================================== |
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130 * |
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131 * Literals that are explicitly type cast |
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132 * e.g.: BYTE#42 |
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133 * INT#65 |
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134 * TIME#45h23m |
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135 * etc... |
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136 * are NOT considered literals in the following code. |
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137 * Since they are type cast, and their data type is fixed and well known, |
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138 * they are treated as a variable of that data type (except when determining lvalues) |
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139 * In other words, when calling search_constant_type_c on these constants, it returns |
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140 * a xxxxx_type_name_c, and not one of the xxxx_literal_c ! |
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141 * |
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142 * When the following code handles a literal, it is really a literal of unknown data type. |
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143 * e.g. 42, may be considered an int, a byte, a word, etc... |
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144 * |
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145 * NOTE: type_symbol == NULL is valid! |
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146 * This will occur, for example, when and undefined/undeclared symbolic_variable is used in the program. |
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147 * This will not be of any type, so we always return false. |
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148 */ |
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149 |
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150 /* A helper function... */ |
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151 bool visit_expression_type_c::is_ANY_ELEMENTARY_type(symbol_c *type_symbol) { |
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152 if (type_symbol == NULL) {return false;} |
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153 return is_ANY_MAGNITUDE_type(type_symbol) |
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154 || is_ANY_BIT_type (type_symbol) |
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155 || is_ANY_STRING_type (type_symbol) |
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156 || is_ANY_DATE_type (type_symbol); |
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157 } |
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158 |
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159 /* A helper function... */ |
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160 bool visit_expression_type_c::is_ANY_SAFEELEMENTARY_type(symbol_c *type_symbol) { |
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161 if (type_symbol == NULL) {return false;} |
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162 return is_ANY_SAFEMAGNITUDE_type(type_symbol) |
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163 || is_ANY_SAFEBIT_type (type_symbol) |
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164 || is_ANY_SAFESTRING_type (type_symbol) |
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165 || is_ANY_SAFEDATE_type (type_symbol); |
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166 } |
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167 |
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168 /* A helper function... */ |
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169 bool visit_expression_type_c::is_ANY_ELEMENTARY_compatible(symbol_c *type_symbol) { |
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170 if (type_symbol == NULL) {return false;} |
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171 /* NOTE: doing |
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172 * return is_ANY_SAFEELEMENTARY_type() || is_ANY_ELEMENTARY_type() |
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173 * is incorrect, as the literals would never be considered compatible... |
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174 */ |
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175 return is_ANY_MAGNITUDE_compatible(type_symbol) |
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176 || is_ANY_BIT_compatible (type_symbol) |
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177 || is_ANY_STRING_compatible (type_symbol) |
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178 || is_ANY_DATE_compatible (type_symbol); |
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179 } |
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180 |
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181 |
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182 /* A helper function... */ |
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183 bool visit_expression_type_c::is_ANY_MAGNITUDE_type(symbol_c *type_symbol) { |
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184 if (type_symbol == NULL) {return false;} |
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185 if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;} |
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186 return is_ANY_NUM_type(type_symbol); |
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187 } |
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188 |
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189 /* A helper function... */ |
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190 bool visit_expression_type_c::is_ANY_SAFEMAGNITUDE_type(symbol_c *type_symbol) { |
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191 if (type_symbol == NULL) {return false;} |
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192 if (typeid(*type_symbol) == typeid(safetime_type_name_c)) {return true;} |
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193 return is_ANY_SAFENUM_type(type_symbol); |
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194 } |
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195 |
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196 /* A helper function... */ |
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197 bool visit_expression_type_c::is_ANY_MAGNITUDE_compatible(symbol_c *type_symbol) { |
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198 if (type_symbol == NULL) {return false;} |
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199 if (is_ANY_MAGNITUDE_type (type_symbol)) {return true;} |
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200 if (is_ANY_SAFEMAGNITUDE_type(type_symbol)) {return true;} |
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201 |
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202 return is_ANY_NUM_compatible(type_symbol); |
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203 } |
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204 |
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205 /* A helper function... */ |
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206 bool visit_expression_type_c::is_ANY_NUM_type(symbol_c *type_symbol) { |
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207 if (type_symbol == NULL) {return false;} |
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208 if (is_ANY_REAL_type(type_symbol)) {return true;} |
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209 if (is_ANY_INT_type(type_symbol)) {return true;} |
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210 return false; |
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211 } |
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212 |
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213 /* A helper function... */ |
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214 bool visit_expression_type_c::is_ANY_SAFENUM_type(symbol_c *type_symbol) { |
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215 if (type_symbol == NULL) {return false;} |
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216 return is_ANY_SAFEREAL_type(type_symbol) |
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217 || is_ANY_SAFEINT_type (type_symbol); |
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218 } |
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219 |
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220 /* A helper function... */ |
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221 bool visit_expression_type_c::is_ANY_NUM_compatible(symbol_c *type_symbol) { |
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222 if (type_symbol == NULL) {return false;} |
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223 if (is_ANY_REAL_compatible(type_symbol)) {return true;} |
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224 if (is_ANY_INT_compatible(type_symbol)) {return true;} |
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225 return false; |
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226 } |
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227 |
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228 /* A helper function... */ |
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229 bool visit_expression_type_c::is_ANY_DATE_type(symbol_c *type_symbol) { |
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230 if (type_symbol == NULL) {return false;} |
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231 if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;} |
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232 if (typeid(*type_symbol) == typeid(tod_type_name_c)) {return true;} |
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233 if (typeid(*type_symbol) == typeid(dt_type_name_c)) {return true;} |
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234 return false; |
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235 } |
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236 |
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237 /* A helper function... */ |
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238 bool visit_expression_type_c::is_ANY_SAFEDATE_type(symbol_c *type_symbol) { |
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239 if (type_symbol == NULL) {return false;} |
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240 if (typeid(*type_symbol) == typeid(safedate_type_name_c)) {return true;} |
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241 if (typeid(*type_symbol) == typeid(safetod_type_name_c)) {return true;} |
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242 if (typeid(*type_symbol) == typeid(safedt_type_name_c)) {return true;} |
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243 return false; |
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244 } |
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245 |
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246 /* A helper function... */ |
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247 bool visit_expression_type_c::is_ANY_DATE_compatible(symbol_c *type_symbol) { |
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248 if (type_symbol == NULL) {return false;} |
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249 if (is_ANY_DATE_type (type_symbol)) {return true;} |
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250 if (is_ANY_SAFEDATE_type(type_symbol)) {return true;} |
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251 return false; |
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252 } |
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253 |
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254 /* A helper function... */ |
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255 bool visit_expression_type_c::is_ANY_STRING_type(symbol_c *type_symbol) { |
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256 if (type_symbol == NULL) {return false;} |
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257 if (typeid(*type_symbol) == typeid(string_type_name_c)) {return true;} |
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258 if (typeid(*type_symbol) == typeid(wstring_type_name_c)) {return true;} |
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259 // TODO literal_string ??? |
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260 return false; |
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261 } |
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262 |
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263 /* A helper function... */ |
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264 bool visit_expression_type_c::is_ANY_SAFESTRING_type(symbol_c *type_symbol) { |
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265 if (type_symbol == NULL) {return false;} |
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266 if (typeid(*type_symbol) == typeid(safestring_type_name_c)) {return true;} |
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267 if (typeid(*type_symbol) == typeid(safewstring_type_name_c)) {return true;} |
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268 return false; |
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269 } |
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270 |
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271 /* A helper function... */ |
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272 bool visit_expression_type_c::is_ANY_STRING_compatible(symbol_c *type_symbol) { |
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273 if (type_symbol == NULL) {return false;} |
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274 if (is_ANY_STRING_type (type_symbol)) {return true;} |
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275 if (is_ANY_SAFESTRING_type(type_symbol)) {return true;} |
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276 return false; |
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277 } |
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278 |
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279 /* A helper function... */ |
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280 bool visit_expression_type_c::is_ANY_INT_type(symbol_c *type_symbol) { |
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281 if (type_symbol == NULL) {return false;} |
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282 if (typeid(*type_symbol) == typeid(sint_type_name_c)) {return true;} |
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283 if (typeid(*type_symbol) == typeid(int_type_name_c)) {return true;} |
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284 if (typeid(*type_symbol) == typeid(dint_type_name_c)) {return true;} |
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285 if (typeid(*type_symbol) == typeid(lint_type_name_c)) {return true;} |
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286 if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;} |
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287 if (typeid(*type_symbol) == typeid(uint_type_name_c)) {return true;} |
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288 if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;} |
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289 if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;} |
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290 return false; |
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291 } |
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292 |
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293 /* A helper function... */ |
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294 bool visit_expression_type_c::is_ANY_SAFEINT_type(symbol_c *type_symbol) { |
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295 if (type_symbol == NULL) {return false;} |
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296 if (typeid(*type_symbol) == typeid(safesint_type_name_c)) {return true;} |
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297 if (typeid(*type_symbol) == typeid(safeint_type_name_c)) {return true;} |
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298 if (typeid(*type_symbol) == typeid(safedint_type_name_c)) {return true;} |
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299 if (typeid(*type_symbol) == typeid(safelint_type_name_c)) {return true;} |
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300 if (typeid(*type_symbol) == typeid(safeusint_type_name_c)) {return true;} |
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301 if (typeid(*type_symbol) == typeid(safeuint_type_name_c)) {return true;} |
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302 if (typeid(*type_symbol) == typeid(safeudint_type_name_c)) {return true;} |
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303 if (typeid(*type_symbol) == typeid(safeulint_type_name_c)) {return true;} |
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304 return false; |
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305 } |
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306 |
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307 /* A helper function... */ |
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308 bool visit_expression_type_c::is_ANY_INT_compatible(symbol_c *type_symbol) { |
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309 if (type_symbol == NULL) {return false;} |
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310 if (is_ANY_INT_type (type_symbol)) {return true;} |
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311 if (is_ANY_SAFEINT_type(type_symbol)) {return true;} |
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312 if (is_literal_integer_type(type_symbol)) {return true;} |
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313 return false; |
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314 } |
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315 |
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316 /* A helper function... */ |
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317 bool visit_expression_type_c::is_ANY_REAL_type(symbol_c *type_symbol) { |
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318 if (type_symbol == NULL) {return false;} |
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319 if (typeid(*type_symbol) == typeid(real_type_name_c)) {return true;} |
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320 if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;} |
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321 return false; |
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322 } |
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323 |
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324 /* A helper function... */ |
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325 bool visit_expression_type_c::is_ANY_SAFEREAL_type(symbol_c *type_symbol) { |
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326 if (type_symbol == NULL) {return false;} |
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327 if (typeid(*type_symbol) == typeid(safereal_type_name_c)) {return true;} |
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328 if (typeid(*type_symbol) == typeid(safelreal_type_name_c)) {return true;} |
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329 return false; |
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330 } |
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331 |
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332 /* A helper function... */ |
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333 bool visit_expression_type_c::is_ANY_REAL_compatible(symbol_c *type_symbol) { |
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334 if (type_symbol == NULL) {return false;} |
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335 if (is_ANY_REAL_type (type_symbol)) {return true;} |
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336 if (is_ANY_SAFEREAL_type(type_symbol)) {return true;} |
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337 if (is_literal_real_type(type_symbol)) {return true;} |
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338 return false; |
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339 } |
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340 |
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341 /* A helper function... */ |
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342 bool visit_expression_type_c::is_ANY_BIT_type(symbol_c *type_symbol) { |
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343 if (type_symbol == NULL) {return false;} |
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344 if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;} |
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345 if (typeid(*type_symbol) == typeid(byte_type_name_c)) {return true;} |
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346 if (typeid(*type_symbol) == typeid(word_type_name_c)) {return true;} |
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347 if (typeid(*type_symbol) == typeid(dword_type_name_c)) {return true;} |
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348 if (typeid(*type_symbol) == typeid(lword_type_name_c)) {return true;} |
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349 return false; |
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350 } |
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351 |
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352 /* A helper function... */ |
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353 bool visit_expression_type_c::is_ANY_SAFEBIT_type(symbol_c *type_symbol) { |
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354 if (type_symbol == NULL) {return false;} |
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355 if (typeid(*type_symbol) == typeid(safebool_type_name_c)) {return true;} |
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356 if (typeid(*type_symbol) == typeid(safebyte_type_name_c)) {return true;} |
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357 if (typeid(*type_symbol) == typeid(safeword_type_name_c)) {return true;} |
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358 if (typeid(*type_symbol) == typeid(safedword_type_name_c)) {return true;} |
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359 if (typeid(*type_symbol) == typeid(safelword_type_name_c)) {return true;} |
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360 return false; |
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361 } |
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362 |
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363 /* A helper function... */ |
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364 bool visit_expression_type_c::is_ANY_BIT_compatible(symbol_c *type_symbol) { |
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365 if (type_symbol == NULL) {return false;} |
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366 if (is_ANY_BIT_type (type_symbol)) {return true;} |
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367 if (is_ANY_SAFEBIT_type(type_symbol)) {return true;} |
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368 if (is_nonneg_literal_integer_type(type_symbol)) {return true;} |
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369 if (is_literal_bool_type(type_symbol)) {return true;} |
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370 return false; |
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371 } |
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372 |
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373 /* A helper function... */ |
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374 bool visit_expression_type_c::is_BOOL_type(symbol_c *type_symbol) { |
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375 if (type_symbol == NULL) {return false;} |
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376 if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;} |
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377 return false; |
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378 } |
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379 |
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380 /* A helper function... */ |
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381 bool visit_expression_type_c::is_SAFEBOOL_type(symbol_c *type_symbol){ |
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382 if (type_symbol == NULL) {return false;} |
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383 if (typeid(*type_symbol) == typeid(safebool_type_name_c)) {return true;} |
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384 return false; |
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385 } |
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386 |
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387 /* A helper function... */ |
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388 bool visit_expression_type_c::is_ANY_BOOL_compatible(symbol_c *type_symbol) { |
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389 if (type_symbol == NULL) {return false;} |
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390 if (is_BOOL_type (type_symbol)) {return true;} |
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391 if (is_SAFEBOOL_type(type_symbol)) {return true;} |
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392 if (is_literal_bool_type(type_symbol)) {return true;} |
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393 return false; |
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394 } |
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395 |
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396 |
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397 #define is_type(type_name_symbol, type_name_class) ((type_name_symbol == NULL) ? false : (typeid(*type_name_symbol) == typeid(type_name_class))) |
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398 |
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399 |
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400 #define sizeoftype(symbol) get_sizeof_datatype_c::getsize(symbol) |
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401 |
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402 |
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403 /* A helper function... */ |
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404 bool visit_expression_type_c::is_literal_integer_type(symbol_c *type_symbol) { |
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405 if (type_symbol == NULL) {return false;} |
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406 if (typeid(*type_symbol) == typeid(neg_integer_c)) {return true;} |
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407 return is_nonneg_literal_integer_type(type_symbol); |
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408 } |
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409 |
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410 |
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411 /* A helper function... */ |
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412 bool visit_expression_type_c::is_nonneg_literal_integer_type(symbol_c *type_symbol) { |
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413 if (type_symbol == NULL) {return false;} |
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414 if (typeid(*type_symbol) == typeid(integer_c)) {return true;} |
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415 if (typeid(*type_symbol) == typeid(binary_integer_c)) {return true;} |
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416 if (typeid(*type_symbol) == typeid(octal_integer_c)) {return true;} |
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417 if (typeid(*type_symbol) == typeid(hex_integer_c)) {return true;} |
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418 return false; |
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419 } |
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420 |
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421 |
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422 /* A helper function... */ |
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423 bool visit_expression_type_c::is_literal_real_type(symbol_c *type_symbol) { |
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424 if (type_symbol == NULL) {return false;} |
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425 if (typeid(*type_symbol) == typeid(real_c)) {return true;} |
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426 if (typeid(*type_symbol) == typeid(neg_real_c)) {return true;} |
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427 return false; |
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428 } |
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429 |
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430 |
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431 /* A helper function... */ |
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432 bool visit_expression_type_c::is_literal_bool_type(symbol_c *type_symbol) { |
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433 bool_type_name_c bool_t; |
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434 |
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435 if (type_symbol == NULL) {return false;} |
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436 if (typeid(*type_symbol) == typeid(boolean_true_c)) {return true;} |
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437 if (typeid(*type_symbol) == typeid(boolean_false_c)) {return true;} |
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438 if (is_nonneg_literal_integer_type(type_symbol)) |
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439 if (sizeoftype(&bool_t) >= sizeoftype(type_symbol)) {return true;} |
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440 return false; |
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441 } |
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442 |
|
443 bool visit_expression_type_c::is_ANY_ELEMENTARY_OR_ENUMERATED_compatible(symbol_c *type_symbol) { |
|
444 if (type_symbol == NULL) {return false;} |
|
445 if (search_base_type.type_is_enumerated(type_symbol)) {return true;} |
|
446 return is_ANY_ELEMENTARY_compatible(type_symbol); |
|
447 } |
|
448 |
|
449 |
|
450 /* Determine the common data type between two data types. |
|
451 * If no common data type found, return NULL. |
|
452 * |
|
453 * If data types are identical, return the first (actually any would do...). |
|
454 * If any of the data types is a literal, we confirm that |
|
455 * the literal uses less bits than the fixed size data type. |
|
456 * e.g. BYTE and 1024 returns NULL |
|
457 * BYTE and 255 returns BYTE |
|
458 * |
|
459 * If two literals, then return the literal that requires more bits... |
|
460 */ |
|
461 |
|
462 symbol_c *visit_expression_type_c::common_type__(symbol_c *first_type, symbol_c *second_type) { |
|
463 if (first_type == NULL && second_type == NULL) {return NULL;} |
|
464 if (first_type == NULL) {return second_type;} |
|
465 if (second_type == NULL) {return first_type;} |
|
466 |
|
467 if (is_literal_integer_type(first_type) && is_literal_integer_type(second_type)) |
|
468 {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);} |
|
469 |
|
470 if (is_literal_real_type(first_type) && is_literal_real_type(second_type)) |
|
471 {return ((sizeoftype(first_type) > sizeoftype(second_type))? first_type:second_type);} |
|
472 |
|
473 if (is_literal_bool_type(first_type) && is_literal_bool_type(second_type)) |
|
474 {return first_type;} |
|
475 |
|
476 /* The following check can only be made after the is_literal_XXXX checks */ |
|
477 /* When two literals of the same type, with identical typeid's are checked, |
|
478 * we must return the one that occupies more bits... This is done above. |
|
479 */ |
|
480 if (typeid(*first_type) == typeid(*second_type)) {return first_type;} |
|
481 |
|
482 /* NOTE Although a BOOL is also an ANY_BIT, we must check it explicitly since some |
|
483 * literal bool values are not literal integers... |
|
484 */ |
|
485 if (is_BOOL_type(first_type) && is_literal_bool_type(second_type)) {return first_type;} |
|
486 if (is_BOOL_type(second_type) && is_literal_bool_type(first_type)) {return second_type;} |
|
487 |
|
488 if (is_SAFEBOOL_type(first_type) && is_literal_bool_type(second_type)) {return first_type;} |
|
489 if (is_SAFEBOOL_type(second_type) && is_literal_bool_type(first_type)) {return second_type;} |
|
490 |
|
491 if (is_SAFEBOOL_type(first_type) && is_BOOL_type(second_type)) {return second_type;} |
|
492 if (is_SAFEBOOL_type(second_type) && is_BOOL_type(first_type)) {return first_type;} |
|
493 |
|
494 if (is_ANY_BIT_type(first_type) && is_nonneg_literal_integer_type(second_type)) |
|
495 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
496 if (is_ANY_BIT_type(second_type) && is_nonneg_literal_integer_type(first_type)) |
|
497 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
498 |
|
499 if (is_ANY_SAFEBIT_type(first_type) && is_nonneg_literal_integer_type(second_type)) |
|
500 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
501 if (is_ANY_SAFEBIT_type(second_type) && is_nonneg_literal_integer_type(first_type)) |
|
502 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
503 |
|
504 if (is_ANY_SAFEBIT_type(first_type) && is_ANY_BIT_type(second_type)) |
|
505 {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);} |
|
506 if (is_ANY_SAFEBIT_type(second_type) && is_ANY_BIT_type(first_type)) |
|
507 {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);} |
|
508 |
|
509 if (is_ANY_INT_type(first_type) && is_literal_integer_type(second_type)) |
|
510 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
511 if (is_ANY_INT_type(second_type) && is_literal_integer_type(first_type)) |
|
512 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
513 |
|
514 if (is_ANY_SAFEINT_type(first_type) && is_literal_integer_type(second_type)) |
|
515 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
516 if (is_ANY_SAFEINT_type(second_type) && is_literal_integer_type(first_type)) |
|
517 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
518 |
|
519 if (is_ANY_SAFEINT_type(first_type) && is_ANY_INT_type(second_type)) |
|
520 {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);} |
|
521 if (is_ANY_SAFEINT_type(second_type) && is_ANY_INT_type(first_type)) |
|
522 {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);} |
|
523 |
|
524 if (is_ANY_REAL_type(first_type) && is_literal_real_type(second_type)) |
|
525 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
526 if (is_ANY_REAL_type(second_type) && is_literal_real_type(first_type)) |
|
527 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
528 |
|
529 if (is_ANY_SAFEREAL_type(first_type) && is_literal_real_type(second_type)) |
|
530 {return ((sizeoftype(first_type) >= sizeoftype(second_type))? first_type :NULL);} |
|
531 if (is_ANY_SAFEREAL_type(second_type) && is_literal_real_type(first_type)) |
|
532 {return ((sizeoftype(second_type) >= sizeoftype(first_type)) ? second_type:NULL);} |
|
533 |
|
534 if (is_ANY_SAFEREAL_type(first_type) && is_ANY_REAL_type(second_type)) |
|
535 {return ((sizeoftype(first_type) == sizeoftype(second_type))? second_type:NULL);} |
|
536 if (is_ANY_SAFEREAL_type(second_type) && is_ANY_REAL_type(first_type)) |
|
537 {return ((sizeoftype(first_type) == sizeoftype(second_type))? first_type :NULL);} |
|
538 |
|
539 /* the Time and Date types... */ |
|
540 if (is_type(first_type, safetime_type_name_c) && is_type(second_type, time_type_name_c)) {return second_type;} |
|
541 if (is_type(second_type, safetime_type_name_c) && is_type( first_type, time_type_name_c)) {return first_type;} |
|
542 |
|
543 if (is_type(first_type, safedate_type_name_c) && is_type(second_type, date_type_name_c)) {return second_type;} |
|
544 if (is_type(second_type, safedate_type_name_c) && is_type( first_type, date_type_name_c)) {return first_type;} |
|
545 |
|
546 if (is_type(first_type, safedt_type_name_c) && is_type(second_type, dt_type_name_c)) {return second_type;} |
|
547 if (is_type(second_type, safedt_type_name_c) && is_type( first_type, dt_type_name_c)) {return first_type;} |
|
548 |
|
549 if (is_type(first_type, safetod_type_name_c) && is_type(second_type, tod_type_name_c)) {return second_type;} |
|
550 if (is_type(second_type, safetod_type_name_c) && is_type( first_type, tod_type_name_c)) {return first_type;} |
|
551 |
|
552 /* no common type */ |
|
553 return NULL; |
|
554 } |
|
555 |
|
556 /* Determine the common data type between two data types. |
|
557 * Unlike the common_type__() function, we stop the compiler with an ERROR |
|
558 * if no common data type is found. |
|
559 */ |
|
560 symbol_c *visit_expression_type_c::common_type(symbol_c *first_type, symbol_c *second_type) { |
|
561 /* |
|
562 symbol_c *res = common_type__(first_type, second_type); |
|
563 if (NULL == res) ERROR; |
|
564 return res; |
|
565 */ |
|
566 return common_type__(first_type, second_type); |
|
567 } |
|
568 |
|
569 |
|
570 /* Return TRUE if the second (value) data type may be assigned to a variable of the first (variable) data type |
|
571 * such as: |
|
572 * var_type value_type |
|
573 * BOOL BYTE#7 -> returns false |
|
574 * INT INT#7 -> returns true |
|
575 * INT 7 -> returns true |
|
576 * REAL 7.89 -> returns true |
|
577 * REAL 7 -> returns true |
|
578 * INT 7.89 -> returns false |
|
579 * SAFEBOOL BOOL#1 -> returns false !!! |
|
580 * etc... |
|
581 * |
|
582 * NOTE: It is assumed that the var_type is the data type of an lvalue |
|
583 */ |
|
584 bool visit_expression_type_c::is_valid_assignment(symbol_c *var_type, symbol_c *value_type) { |
|
585 if (var_type == NULL) {/* STAGE3_ERROR(value_type, value_type, "Var_type == NULL"); */ return false;} |
|
586 if (value_type == NULL) {/* STAGE3_ERROR(var_type, var_type, "Value_type == NULL"); */ return false;} |
|
587 |
|
588 symbol_c *common_type = common_type__(var_type, value_type); |
|
589 if (NULL == common_type) |
|
590 return false; |
|
591 return (typeid(*var_type) == typeid(*common_type)); |
|
592 } |
|
593 |
|
594 |
|
595 /* Return TRUE if there is a common data type, otherwise return FALSE |
|
596 * i.e., return TRUE if both data types may be used simultaneously in an expression |
|
597 * such as: |
|
598 * BOOL#0 AND BYTE#7 -> returns false |
|
599 * 0 AND BYTE#7 -> returns true |
|
600 * INT#10 AND INT#7 -> returns true |
|
601 * INT#10 AND 7 -> returns true |
|
602 * REAL#34.3 AND 7.89 -> returns true |
|
603 * REAL#34.3 AND 7 -> returns true |
|
604 * INT#10 AND 7.89 -> returns false |
|
605 * SAFEBOOL#0 AND BOOL#1 -> returns true !!! |
|
606 * etc... |
|
607 */ |
|
608 bool visit_expression_type_c::is_compatible_type(symbol_c *first_type, symbol_c *second_type) { |
|
609 if (first_type == NULL || second_type == NULL) {return false;} |
|
610 return (NULL != common_type__(first_type, second_type)); |
|
611 } |
|
612 |
|
613 |
|
614 |
|
615 |
|
616 /* A helper function... */ |
|
617 /* |
|
618 symbol_c *visit_expression_type_c::compute_boolean_expression(symbol_c *left_type, symbol_c *right_type, |
|
619 is_data_type_t is_data_type) { |
|
620 */ |
|
621 symbol_c *visit_expression_type_c::compute_expression(symbol_c *left_type, symbol_c *right_type, is_data_type_t is_data_type, |
|
622 symbol_c *left_expr, symbol_c *right_expr) { |
|
623 bool error = false; |
|
624 |
|
625 if (!(this->*is_data_type)(left_type)) { |
|
626 if (debug) printf("visit_expression_type_c::compute_expression(): invalid left_type\n"); |
|
627 if (left_expr != NULL) |
|
628 STAGE3_ERROR(left_expr, left_expr, "Invalid data type of operand, or of data resulting from previous IL instructions."); |
|
629 error = true; |
|
630 } |
|
631 if (!(this->*is_data_type)(right_type)) { |
|
632 if (debug) printf("visit_expression_type_c::compute_expression(): invalid right_type\n"); |
|
633 if (right_expr != NULL) |
|
634 STAGE3_ERROR(right_expr, right_expr, "Invalid data type of operand."); |
|
635 error = true; |
|
636 } |
|
637 if (!is_compatible_type(left_type, right_type)) { |
|
638 if (debug) printf("visit_expression_type_c::compute_expression(): left_type & right_type are incompatible\n"); |
|
639 if ((left_expr != NULL) && (right_expr != NULL)) |
|
640 STAGE3_ERROR(left_expr, right_expr, "Type mismatch between operands."); |
|
641 error = true; |
|
642 } |
|
643 |
|
644 if (error) |
|
645 return NULL; |
|
646 else |
|
647 return common_type(left_type, right_type); |
|
648 } |
|
649 |
|
650 |
|
651 |
|
652 |
|
653 /* A helper function... */ |
|
654 /* check the semantics of a FB or Function non-formal call */ |
|
655 /* e.g. foo(1, 2, 3, 4); */ |
|
656 /* If error_count pointer is != NULL, we do not really print out the errors, |
|
657 * but rather only count how many errors were found. |
|
658 * This is used to support overloaded functions, where we have to check each possible |
|
659 * function, one at a time, untill we find a function call without any errors. |
|
660 */ |
|
661 void visit_expression_type_c::check_nonformal_call(symbol_c *f_call, symbol_c *f_decl, bool use_il_defvar, int *error_count) { |
|
662 symbol_c *call_param_value, *call_param_type, *param_type; |
|
663 identifier_c *param_name; |
|
664 function_param_iterator_c fp_iterator(f_decl); |
|
665 function_call_param_iterator_c fcp_iterator(f_call); |
|
666 int extensible_parameter_highest_index = -1; |
|
667 |
|
668 /* reset error counter */ |
|
669 if (error_count != NULL) *error_count = 0; |
|
670 /* if use_il_defvar, then the first parameter for the call comes from the il_default_variable */ |
|
671 if (use_il_defvar) { |
|
672 /* The first parameter of the function corresponds to the il_default_variable_type of the function call */ |
|
673 do { |
|
674 param_name = fp_iterator.next(); |
|
675 if(param_name == NULL) break; |
|
676 /* The EN and ENO parameters are default parameters. |
|
677 * In the non-formal invocation of a function there can be no assignment of |
|
678 * values to these parameters. Therefore, we ignore the parameters declared |
|
679 * in the function. |
|
680 */ |
|
681 } while ((strcmp(param_name->value, "EN") == 0) || (strcmp(param_name->value, "ENO") == 0)); |
|
682 /* If the function does not have any parameters (param_name == NULL) |
|
683 * then we cannot compare its type with the il_default_variable_type. |
|
684 * |
|
685 * However, I (Mario) think this is invalid syntax, as it seems to me all functions must |
|
686 * have at least one parameter. |
|
687 * However, we will make this semantic verification consider it possible, as later |
|
688 * versions of the standard may change that syntax. |
|
689 * So, instead of generating a syntax error message, we simply check whether the call |
|
690 * is passing any more parameters besides the default variable (the il default variable may be ignored |
|
691 * in this case, and not consider it as being a parameter being passed to the function). |
|
692 * If it does, then we have found a semantic error, otherwise the function call is |
|
693 * correct, and we simply return. |
|
694 */ |
|
695 if(param_name == NULL) { |
|
696 if (fcp_iterator.next_nf() != NULL) |
|
697 STAGE3_ERROR(f_call, f_call, "Too many parameters in function/FB call."); |
|
698 return; |
|
699 } else { |
|
700 /* param_name != NULL */ |
|
701 param_type = fp_iterator.param_type(); |
|
702 if(!is_valid_assignment(param_type, il_default_variable_type)) { |
|
703 if (error_count != NULL) (*error_count)++; |
|
704 else STAGE3_ERROR(f_call, f_call, "In function/FB call, first parameter has invalid data type."); |
|
705 } |
|
706 } |
|
707 |
|
708 /* the fisrt parameter (il_def_variable) is correct */ |
|
709 if (extensible_parameter_highest_index < fp_iterator.extensible_param_index()) { |
|
710 extensible_parameter_highest_index = fp_iterator.extensible_param_index(); |
|
711 } |
|
712 } // if (use_il_defvar) |
|
713 |
|
714 |
|
715 |
|
716 /* Iterating through the non-formal parameters of the function call */ |
|
717 while((call_param_value = fcp_iterator.next_nf()) != NULL) { |
|
718 /* Obtaining the type of the value being passed in the function call */ |
|
719 call_param_type = base_type((symbol_c*)call_param_value->accept(*this)); |
|
720 if (call_param_type == NULL) { |
|
721 if (error_count != NULL) (*error_count)++; |
|
722 /* the following error will usually occur when ST code uses an identifier, that could refer to an enumerated constant, |
|
723 * but was not actually used as a constant in any definitions of an enumerated data type |
|
724 */ |
|
725 else STAGE3_ERROR(call_param_value, call_param_value, "Could not determine data type of value being passed in function/FB call."); |
|
726 continue; |
|
727 } |
|
728 |
|
729 /* Iterate to the next parameter of the function being called. |
|
730 * Get the name of that parameter, and ignore if EN or ENO. |
|
731 */ |
|
732 do { |
|
733 param_name = fp_iterator.next(); |
|
734 /* If there is no other parameter declared, then we are passing too many parameters... */ |
|
735 if(param_name == NULL) { |
|
736 if (error_count != NULL) (*error_count)++; |
|
737 /* Note: We don't want to print out the follwoing error message multiple times, so we return instead of continuing with 'break' */ |
|
738 else STAGE3_ERROR(f_call, f_call, "Too many parameters in function/FB call."); return; |
|
739 } |
|
740 } while ((strcmp(param_name->value, "EN") == 0) || (strcmp(param_name->value, "ENO") == 0)); |
|
741 |
|
742 /* Get the parameter type */ |
|
743 param_type = base_type(fp_iterator.param_type()); |
|
744 /* If the declared parameter and the parameter from the function call do not have the same type */ |
|
745 if(!is_valid_assignment(param_type, call_param_type)) { |
|
746 if (error_count != NULL) (*error_count)++; |
|
747 else STAGE3_ERROR(call_param_value, call_param_value, "Type mismatch in function/FB call parameter."); |
|
748 } |
|
749 |
|
750 if (extensible_parameter_highest_index < fp_iterator.extensible_param_index()) { |
|
751 extensible_parameter_highest_index = fp_iterator.extensible_param_index(); |
|
752 } |
|
753 } |
|
754 |
|
755 /* The function call may not have any errors! */ |
|
756 /* In the case of a call to an extensible function, we store the highest index |
|
757 * of the extensible parameters this particular call uses, in the symbol_c object |
|
758 * of the function call itself! |
|
759 * In calls to non-extensible functions, this value will be set to -1. |
|
760 * This information is later used in stage4 to correctly generate the |
|
761 * output code. |
|
762 */ |
|
763 int extensible_param_count = -1; |
|
764 if (extensible_parameter_highest_index >=0) /* if call to extensible function */ |
|
765 extensible_param_count = 1 + extensible_parameter_highest_index - fp_iterator.first_extensible_param_index(); |
|
766 il_function_call_c *il_function_call = dynamic_cast<il_function_call_c *>(f_call); |
|
767 function_invocation_c *function_invocation = dynamic_cast<function_invocation_c *>(f_call); |
|
768 if (il_function_call != NULL) il_function_call ->extensible_param_count = extensible_param_count; |
|
769 else if (function_invocation != NULL) function_invocation->extensible_param_count = extensible_param_count; |
|
770 // else ERROR; /* this function is also called by Function Blocks, so this is not an error! */ |
|
771 } |
|
772 |
|
773 |
|
774 /* check semantics of FB call in the IL language using input operators */ |
|
775 /* e.g. CU, CLK, IN, PT, SR, ... */ |
|
776 void visit_expression_type_c::check_il_fbcall(symbol_c *il_operator, const char *il_operator_str) { |
|
777 symbol_c *call_param_type = il_default_variable_type; |
|
778 symbol_c *fb_decl = il_operand_type; |
|
779 /* The following should never occur. The function block must be defined, |
|
780 * and the FB type being called MUST be in the symtable... |
|
781 * This was all already checked at stage 2! |
|
782 */ |
|
783 if (NULL == fb_decl) ERROR; |
|
784 if (call_param_type == NULL) ERROR; |
|
785 |
|
786 /* We also create an identifier_c object, so we can later use it to find the equivalent FB parameter */ |
|
787 /* Note however that this symbol does not have the correct location (file name and line numbers) |
|
788 * so any error messages must use the il_operator symbol to generate the error location |
|
789 */ |
|
790 identifier_c call_param_name(il_operator_str); |
|
791 |
|
792 /* Obtaining the type of the value being passed in the function call */ |
|
793 call_param_type = base_type(call_param_type); |
|
794 if (call_param_type == NULL) STAGE3_ERROR(il_operator, il_operator, "Could not determine data type of value being passed in FB call."); |
|
795 |
|
796 /* Find the corresponding parameter of the function being called */ |
|
797 function_param_iterator_c fp_iterator(fb_decl); |
|
798 if(fp_iterator.search(&call_param_name) == NULL) { |
|
799 STAGE3_ERROR(il_operand, il_operand, "Called FB does not have an input parameter named %s.", il_operator_str); |
|
800 } else { |
|
801 /* Get the parameter type */ |
|
802 symbol_c *param_type = base_type(fp_iterator.param_type()); |
|
803 /* If the declared parameter and the parameter from the function call have the same type */ |
|
804 if(!is_valid_assignment(param_type, call_param_type)) STAGE3_ERROR(il_operator, il_operator, "Type mismatch in FB call parameter."); |
|
805 } |
|
806 } |
|
807 |
|
808 |
|
809 /* A helper function... */ |
|
810 /* check the semantics of a FB or Function formal call */ |
|
811 /* e.g. foo(IN1 := 1, OUT1 =>x, EN := true); */ |
|
812 /* If error_count pointer is != NULL, we do not really print out the errors, |
|
813 * but rather only count how many errors were found. |
|
814 * This is used to support overloaded functions, where we have to check each possible |
|
815 * function, one at a time, untill we find a function call without any errors. |
|
816 */ |
|
817 void visit_expression_type_c::check_formal_call(symbol_c *f_call, symbol_c *f_decl, int *error_count) { |
|
818 symbol_c *call_param_value, *call_param_type, *call_param_name, *param_type; |
|
819 symbol_c *verify_duplicate_param; |
|
820 identifier_c *param_name; |
|
821 function_param_iterator_c fp_iterator(f_decl); |
|
822 function_call_param_iterator_c fcp_iterator(f_call); |
|
823 int extensible_parameter_highest_index = -1; |
|
824 identifier_c *extensible_parameter_name; |
|
825 |
|
826 /* reset error counter */ |
|
827 if (error_count != NULL) *error_count = 0; |
|
828 |
|
829 /* Iterating through the formal parameters of the function call */ |
|
830 while((call_param_name = fcp_iterator.next_f()) != NULL) { |
|
831 |
|
832 /* Obtaining the value being passed in the function call */ |
|
833 call_param_value = fcp_iterator.get_current_value(); |
|
834 /* the following should never occur. If it does, then we have a bug in our code... */ |
|
835 if (NULL == call_param_value) ERROR; |
|
836 |
|
837 /* Checking if there are duplicated parameter values */ |
|
838 verify_duplicate_param = fcp_iterator.search_f(call_param_name); |
|
839 if(verify_duplicate_param != call_param_value){ |
|
840 if (error_count != NULL) (*error_count)++; |
|
841 else STAGE3_ERROR(call_param_name, verify_duplicate_param, "Duplicated parameter values."); |
|
842 } |
|
843 |
|
844 /* Obtaining the type of the value being passed in the function call */ |
|
845 call_param_type = (symbol_c*)call_param_value->accept(*this); |
|
846 if (call_param_type == NULL) { |
|
847 if (error_count != NULL) (*error_count)++; |
|
848 else STAGE3_ERROR(call_param_name, call_param_value, "Could not determine data type of value being passed in function/FB call."); |
|
849 /* The data value being passed is possibly any enumerated type value. |
|
850 * We do not yet handle semantic verification of enumerated types. |
|
851 */ |
|
852 ERROR; |
|
853 } |
|
854 call_param_type = base_type(call_param_type); |
|
855 if (call_param_type == NULL) STAGE3_ERROR(call_param_name, call_param_value, "Could not determine data type of value being passed in function/FB call."); |
|
856 |
|
857 /* Find the corresponding parameter of the function being called */ |
|
858 param_name = fp_iterator.search(call_param_name); |
|
859 if(param_name == NULL) { |
|
860 if (error_count != NULL) (*error_count)++; |
|
861 else STAGE3_ERROR(call_param_name, call_param_name, "Invalid parameter in function/FB call."); |
|
862 } else { |
|
863 /* Get the parameter type */ |
|
864 param_type = base_type(fp_iterator.param_type()); |
|
865 /* If the declared parameter and the parameter from the function call have the same type */ |
|
866 if(!is_valid_assignment(param_type, call_param_type)) { |
|
867 if (error_count != NULL) (*error_count)++; |
|
868 else STAGE3_ERROR(call_param_name, call_param_value, "Type mismatch function/FB call parameter."); |
|
869 } |
|
870 if (extensible_parameter_highest_index < fp_iterator.extensible_param_index()) { |
|
871 extensible_parameter_highest_index = fp_iterator.extensible_param_index(); |
|
872 extensible_parameter_name = param_name; |
|
873 } |
|
874 } |
|
875 } |
|
876 |
|
877 /* In the case of a call to an extensible function, we store the highest index |
|
878 * of the extensible parameters this particular call uses, in the symbol_c object |
|
879 * of the function call itself! |
|
880 * In calls to non-extensible functions, this value will be set to -1. |
|
881 * This information is later used in stage4 to correctly generate the |
|
882 * output code. |
|
883 */ |
|
884 int extensible_param_count = -1; |
|
885 if (extensible_parameter_highest_index >=0) /* if call to extensible function */ |
|
886 extensible_param_count = 1 + extensible_parameter_highest_index - fp_iterator.first_extensible_param_index(); |
|
887 il_formal_funct_call_c *il_formal_funct_call = dynamic_cast<il_formal_funct_call_c *>(f_call); |
|
888 function_invocation_c *function_invocation = dynamic_cast<function_invocation_c *>(f_call); |
|
889 if (il_formal_funct_call != NULL) il_formal_funct_call->extensible_param_count = extensible_param_count; |
|
890 else if (function_invocation != NULL) function_invocation->extensible_param_count = extensible_param_count; |
|
891 // else ERROR; /* this function is also called by Function Blocks, so this is not an error! */ |
|
892 |
|
893 /* We have iterated through all the formal parameters of the function call, |
|
894 * and everything seems fine. |
|
895 * If the function being called in an extensible function, we now check |
|
896 * whether the extensible paramters in the formal invocation do not skip |
|
897 * any indexes... |
|
898 * |
|
899 * f(in1:=0, in2:=0, in4:=0) --> ERROR!! |
|
900 */ |
|
901 if (extensible_parameter_highest_index >=0) { /* if call to extensible function */ |
|
902 for (int i=fp_iterator.first_extensible_param_index(); i < extensible_parameter_highest_index; i++) { |
|
903 char tmp[256]; |
|
904 if (snprintf(tmp, 256, "%s%d", extensible_parameter_name->value, i) >= 256) ERROR; |
|
905 if (fcp_iterator.search_f(tmp) == NULL) { |
|
906 /* error in invocation of extensible function */ |
|
907 if (error_count != NULL) (*error_count)++; |
|
908 else STAGE3_ERROR(f_call, f_call, "Missing extensible parameters in call to extensible function."); |
|
909 } |
|
910 } |
|
911 } |
|
912 } |
|
913 |
|
914 |
|
915 |
|
916 |
|
917 /* a helper function... */ |
|
918 symbol_c *visit_expression_type_c::base_type(symbol_c *symbol) { |
|
919 /* NOTE: symbol == NULL is valid. It will occur when, for e.g., an undefined/undeclared symbolic_variable is used |
|
920 * in the code. |
|
921 */ |
|
922 if (symbol == NULL) return NULL; |
|
923 return (symbol_c *)symbol->accept(search_base_type); |
|
924 } |
|
925 |
|
926 |
|
927 /* a helper function... */ |
|
928 void *visit_expression_type_c::verify_null(symbol_c *symbol){ |
|
929 if(il_default_variable_type == NULL){ |
|
930 STAGE3_ERROR(symbol, symbol, "Missing LD instruction (or equivalent) before this instruction."); |
|
931 } |
|
932 if(il_operand_type == NULL){ |
|
933 STAGE3_ERROR(symbol, symbol, "This instruction requires an operand."); |
|
934 } |
|
935 return NULL; |
|
936 } |
|
937 |
|
938 |
|
939 /********************************/ |
|
940 /* B 1.3.3 - Derived data types */ |
|
941 /********************************/ |
|
942 void *visit_expression_type_c::visit(data_type_declaration_c *symbol) { |
|
943 // TODO !!! |
|
944 /* for the moment we must return NULL so semantic analysis of remaining code is not interrupted! */ |
|
945 return NULL; |
|
946 } |
|
947 |
|
948 |
|
949 /*********************/ |
|
950 /* B 1.4 - Variables */ |
|
951 /*********************/ |
|
952 |
|
953 void *visit_expression_type_c::visit(symbolic_variable_c *symbol) { |
|
954 return search_varfb_instance_type->get_basetype_decl(symbol); |
|
955 } |
|
956 |
|
957 /********************************************/ |
|
958 /* B 1.4.1 - Directly Represented Variables */ |
|
959 /********************************************/ |
|
960 void *visit_expression_type_c::visit(direct_variable_c *symbol) { |
|
961 switch (symbol->value[2]) { |
|
962 case 'X': // bit - 1 bit |
|
963 return (void *)&bool_type_name; |
|
964 case 'B': // byte - 8 bits |
|
965 return (void *)&byte_type_name; |
|
966 case 'W': // word - 16 bits |
|
967 return (void *)&word_type_name; |
|
968 case 'D': // double word - 32 bits |
|
969 return (void *)&dword_type_name; |
|
970 case 'L': // long word - 64 bits |
|
971 return (void *)&lword_type_name; |
|
972 default: // if none of the above, then the empty string was used <=> boolean |
|
973 return (void *)&bool_type_name; |
|
974 } |
|
975 } |
|
976 |
|
977 /*************************************/ |
|
978 /* B 1.4.2 - Multi-element variables */ |
|
979 /*************************************/ |
|
980 void *visit_expression_type_c::visit(array_variable_c *symbol) { |
|
981 return search_varfb_instance_type->get_basetype_decl(symbol); |
|
982 } |
|
983 |
|
984 void *visit_expression_type_c::visit(structured_variable_c *symbol) { |
|
985 return search_varfb_instance_type->get_basetype_decl(symbol); |
|
986 } |
|
987 |
|
988 |
|
989 |
|
990 /********************************/ |
|
991 /* B 1.7 Configuration elements */ |
|
992 /********************************/ |
|
993 void *visit_expression_type_c::visit(configuration_declaration_c *symbol) { |
|
994 // TODO !!! |
|
995 /* for the moment we must return NULL so semantic analysis of remaining code is not interrupted! */ |
|
996 return NULL; |
|
997 } |
|
998 |
|
999 |
|
1000 /****************************************/ |
|
1001 /* B.2 - Language IL (Instruction List) */ |
|
1002 /****************************************/ |
|
1003 /***********************************/ |
|
1004 /* B 2.1 Instructions and Operands */ |
|
1005 /***********************************/ |
|
1006 /*| instruction_list il_instruction */ |
|
1007 /* The visitor of the base class search_visitor_c will handle calling each instruction in the list. |
|
1008 * We do not need to do anything here... |
|
1009 */ |
|
1010 // void *visit_expression_type_c::visit(instruction_list_c *symbol) |
|
1011 |
|
1012 /* | label ':' [il_incomplete_instruction] eol_list */ |
|
1013 //SYM_REF2(il_instruction_c, label, il_instruction) |
|
1014 // void *visit_expression_type_c::visit(il_instruction_c *symbol); |
|
1015 |
|
1016 |
|
1017 /* | il_simple_operator [il_operand] */ |
|
1018 // SYM_REF2(il_simple_operation_c, il_simple_operator, il_operand) |
|
1019 void *visit_expression_type_c::visit(il_simple_operation_c *symbol) { |
|
1020 if (il_error) |
|
1021 return NULL; |
|
1022 |
|
1023 /* determine the data type of the operand */ |
|
1024 il_operand = symbol->il_operand; |
|
1025 if (symbol->il_operand != NULL){ |
|
1026 il_operand_type = base_type((symbol_c *)symbol->il_operand->accept(*this)); |
|
1027 } else { |
|
1028 il_operand_type = NULL; |
|
1029 } |
|
1030 /* recursive call to see whether data types are compatible */ |
|
1031 symbol->il_simple_operator->accept(*this); |
|
1032 |
|
1033 il_operand_type = NULL; |
|
1034 il_operand = NULL; |
|
1035 return NULL; |
|
1036 } |
|
1037 |
|
1038 // | function_name [il_operand_list] */ |
|
1039 //SYM_REF2(il_function_call_c, function_name, il_operand_list) |
|
1040 void *visit_expression_type_c::visit(il_function_call_c *symbol) { |
|
1041 if (il_error) |
|
1042 return NULL; |
|
1043 |
|
1044 symbol_c *return_data_type = NULL; |
|
1045 |
|
1046 /* First find the declaration of the function being called! */ |
|
1047 function_symtable_t::iterator lower = function_symtable.lower_bound(symbol->function_name); |
|
1048 function_symtable_t::iterator upper = function_symtable.upper_bound(symbol->function_name); |
|
1049 if (lower == function_symtable.end()) ERROR; |
|
1050 |
|
1051 int error_count = 0; |
|
1052 int *error_count_ptr = NULL; |
|
1053 |
|
1054 function_symtable_t::iterator second = lower; |
|
1055 second++; |
|
1056 if (second != upper) |
|
1057 /* This is a call to an overloaded function... */ |
|
1058 error_count_ptr = &error_count; |
|
1059 |
|
1060 for(; lower != upper; lower++) { |
|
1061 function_declaration_c *f_decl = function_symtable.get_value(lower); |
|
1062 |
|
1063 check_nonformal_call(symbol, f_decl, true, error_count_ptr); |
|
1064 |
|
1065 if (0 == error_count) { |
|
1066 /* Either: |
|
1067 * (i) we have a call to a non-overloaded function (error_cnt_ptr is NULL!, so error_count won't change!) |
|
1068 * (ii) we have a call to an overloaded function, with no errors! |
|
1069 */ |
|
1070 |
|
1071 /* Store the pointer to the declaration of the function being called. |
|
1072 * This data will be used by stage 4 to call the correct function. |
|
1073 * Mostly needed to disambiguate overloaded functions... |
|
1074 * See comments in absyntax.def for more details |
|
1075 */ |
|
1076 symbol->called_function_declaration = f_decl; |
|
1077 /* determine the base data type returned by the function being called... */ |
|
1078 return_data_type = base_type(f_decl->type_name); |
|
1079 /* If the following occurs, then we must have some big bug in the syntax parser (stage 2)... */ |
|
1080 if (NULL == return_data_type) ERROR; |
|
1081 /* set the new data type of the default variable for the following verifications... */ |
|
1082 il_default_variable_type = return_data_type; |
|
1083 return NULL; |
|
1084 } |
|
1085 } |
|
1086 |
|
1087 /* No compatible function was found for this function call */ |
|
1088 STAGE3_ERROR(symbol, symbol, "Call to an overloaded function with invalid parameter type."); |
|
1089 return NULL; |
|
1090 } |
|
1091 |
|
1092 |
|
1093 /* | il_expr_operator '(' [il_operand] eol_list [simple_instr_list] ')' */ |
|
1094 // SYM_REF3(il_expression_c, il_expr_operator, il_operand, simple_instr_list); |
|
1095 void *visit_expression_type_c::visit(il_expression_c *symbol) { |
|
1096 if (il_error) |
|
1097 return NULL; |
|
1098 |
|
1099 symbol_c *il_default_variable_type_back = il_default_variable_type; |
|
1100 |
|
1101 il_parenthesis_level++; |
|
1102 |
|
1103 if(symbol->il_operand != NULL) { |
|
1104 il_default_variable_type = base_type((symbol_c *)symbol->il_operand->accept(*this)); |
|
1105 } else { |
|
1106 il_default_variable_type = NULL; |
|
1107 } |
|
1108 |
|
1109 if(symbol->simple_instr_list != NULL) { |
|
1110 symbol->simple_instr_list->accept(*this); |
|
1111 } |
|
1112 |
|
1113 il_parenthesis_level--; |
|
1114 if (il_parenthesis_level < 0) ERROR; |
|
1115 |
|
1116 il_operand = symbol->simple_instr_list; |
|
1117 il_operand_type = il_default_variable_type; |
|
1118 il_default_variable_type = il_default_variable_type_back; |
|
1119 |
|
1120 /* Now check the if the data type semantics of operation are correct, |
|
1121 * but only if no previous error has been found... |
|
1122 */ |
|
1123 if (!il_error) |
|
1124 symbol->il_expr_operator->accept(*this); |
|
1125 |
|
1126 il_operand_type = NULL; |
|
1127 il_operand = NULL; |
|
1128 return NULL; |
|
1129 } |
|
1130 |
|
1131 |
|
1132 #if 0 |
|
1133 /* il_jump_operator label */ |
|
1134 SYM_REF2(il_jump_operation_c, il_jump_operator, label) |
|
1135 void *visit_expression_type_c::visit(il_jump_operation_c *symbol); |
|
1136 #endif |
|
1137 |
|
1138 |
|
1139 /* il_call_operator prev_declared_fb_name |
|
1140 * | il_call_operator prev_declared_fb_name '(' ')' |
|
1141 * | il_call_operator prev_declared_fb_name '(' eol_list ')' |
|
1142 * | il_call_operator prev_declared_fb_name '(' il_operand_list ')' |
|
1143 * | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')' |
|
1144 */ |
|
1145 /* SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list) */ |
|
1146 void *visit_expression_type_c::visit(il_fb_call_c *symbol) { |
|
1147 if (il_error) |
|
1148 return NULL; |
|
1149 |
|
1150 /* first check whether the il_default_variable is of the correct type |
|
1151 * for the CAL / CALC / CALCN operator being used... |
|
1152 */ |
|
1153 symbol->il_call_operator->accept(*this); |
|
1154 |
|
1155 /* Now check the FB call itself... */ |
|
1156 |
|
1157 /* First we find the declaration of the FB type of the FB instance being called... */ |
|
1158 /* e.g. Function_block foo_fb_type |
|
1159 * ... |
|
1160 * End_Function_Block |
|
1161 * |
|
1162 * Program test |
|
1163 * var fb1 : foo_fb_type; end_var |
|
1164 * fb1(...) |
|
1165 * End_Program |
|
1166 * |
|
1167 * search_varfb_instance_type->get_basetype_decl( identifier_c("fb1") ) |
|
1168 * in the scope of Program 'test' |
|
1169 * will return the fb declaration of foo_fb_type !! |
|
1170 */ |
|
1171 #if 0 |
|
1172 symbol_c *fb_decl_symbol = search_varfb_instance_type->get_basetype_decl(symbol->fb_name); |
|
1173 /* The following should never occur. The function block must be defined, |
|
1174 * and the FB type being called MUST be in the symtable... |
|
1175 * This was all already checked at stage 2! |
|
1176 */ |
|
1177 if (NULL == fb_decl_symbol) ERROR; |
|
1178 |
|
1179 function_block_declaration_c *fb_decl = dynamic_cast<function_block_declaration_c *>(fb_decl_symbol); |
|
1180 /* should never occur. ... */ |
|
1181 if (NULL == fb_decl) ERROR; |
|
1182 #endif |
|
1183 symbol_c *fb_decl = search_varfb_instance_type->get_basetype_decl(symbol->fb_name); |
|
1184 /* The following should never occur. The function block must be defined, |
|
1185 * and the FB type being called MUST be in the symtable... |
|
1186 * This was all already checked at stage 2! |
|
1187 */ |
|
1188 if (NULL == fb_decl) ERROR; |
|
1189 |
|
1190 /* now check the semantics of the fb call... */ |
|
1191 /* If the syntax parser is working correctly, exactly one of the |
|
1192 * following two symbols will be NULL, while the other is != NULL. |
|
1193 */ |
|
1194 if (NULL != symbol->il_operand_list) check_nonformal_call(symbol, fb_decl); |
|
1195 if (NULL != symbol->il_param_list) check_formal_call (symbol, fb_decl); |
|
1196 |
|
1197 return NULL; |
|
1198 } |
|
1199 |
|
1200 |
|
1201 |
|
1202 /* | function_name '(' eol_list [il_param_list] ')' */ |
|
1203 /* SYM_REF2(il_formal_funct_call_c, function_name, il_param_list) */ |
|
1204 void *visit_expression_type_c::visit(il_formal_funct_call_c *symbol) { |
|
1205 if (il_error) |
|
1206 return NULL; |
|
1207 |
|
1208 symbol_c *return_data_type = NULL; |
|
1209 function_symtable_t::iterator lower = function_symtable.lower_bound(symbol->function_name); |
|
1210 function_symtable_t::iterator upper = function_symtable.upper_bound(symbol->function_name); |
|
1211 |
|
1212 if (lower == function_symtable.end()) { |
|
1213 function_type_t current_function_type = get_function_type((identifier_c *)symbol->function_name); |
|
1214 if (current_function_type == function_none) ERROR; |
|
1215 return NULL; |
|
1216 } |
|
1217 |
|
1218 int error_count = 0; |
|
1219 int *error_count_ptr = NULL; |
|
1220 |
|
1221 function_symtable_t::iterator second = lower; |
|
1222 second++; |
|
1223 if (second != upper) |
|
1224 /* This is a call to an overloaded function... */ |
|
1225 error_count_ptr = &error_count; |
|
1226 |
|
1227 for(; lower != upper; lower++) { |
|
1228 function_declaration_c *f_decl = function_symtable.get_value(lower); |
|
1229 |
|
1230 /* check semantics of data passed in the function call... */ |
|
1231 check_formal_call(symbol, f_decl, error_count_ptr); |
|
1232 |
|
1233 if (0 == error_count) { |
|
1234 /* Either: |
|
1235 * (i) we have a call to a non-overloaded function (error_cnt_ptr is NULL!, so error_count won't change!) |
|
1236 * (ii) we have a call to an overloaded function, with no errors! |
|
1237 */ |
|
1238 |
|
1239 /* Store the pointer to the declaration of the function being called. |
|
1240 * This data will be used by stage 4 to call the correct function. |
|
1241 * Mostly needed to disambiguate overloaded functions... |
|
1242 * See comments in absyntax.def for more details |
|
1243 */ |
|
1244 symbol->called_function_declaration = f_decl; |
|
1245 /* determine the base data type returned by the function being called... */ |
|
1246 return_data_type = base_type(f_decl->type_name); |
|
1247 /* the following should never occur. If it does, then we have a bug in the syntax parser (stage 2)... */ |
|
1248 if (NULL == return_data_type) ERROR; |
|
1249 /* the data type of the data returned by the function, and stored in the il default variable... */ |
|
1250 il_default_variable_type = return_data_type; |
|
1251 return NULL; |
|
1252 } |
|
1253 } |
|
1254 |
|
1255 /* No compatible function was found for this function call */ |
|
1256 STAGE3_ERROR(symbol, symbol, "Call to an overloaded function with invalid parameter type."); |
|
1257 return NULL; |
|
1258 } |
|
1259 |
|
1260 |
|
1261 #if 0 |
|
1262 /* | il_operand_list ',' il_operand */ |
|
1263 SYM_LIST(il_operand_list_c) |
|
1264 void *visit_expression_type_c::visit(il_operand_list_c *symbol); |
|
1265 |
|
1266 /* | simple_instr_list il_simple_instruction */ |
|
1267 SYM_LIST(simple_instr_list_c) |
|
1268 void *visit_expression_type_c::visit(simple_instr_list_c *symbol); |
|
1269 |
|
1270 /* | il_initial_param_list il_param_instruction */ |
|
1271 SYM_LIST(il_param_list_c) |
|
1272 void *visit_expression_type_c::visit(il_param_list_c *symbol); |
|
1273 |
|
1274 /* il_assign_operator il_operand |
|
1275 * | il_assign_operator '(' eol_list simple_instr_list ')' |
|
1276 */ |
|
1277 SYM_REF3(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list) |
|
1278 void *visit_expression_type_c::visit(il_param_assignment_c *symbol); |
|
1279 /* il_assign_out_operator variable */ |
|
1280 SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable) |
|
1281 void *visit_expression_type_c::visit(il_param_out_assignment_c *symbol); |
|
1282 |
|
1283 #endif |
|
1284 |
|
1285 |
|
1286 /*******************/ |
|
1287 /* B 2.2 Operators */ |
|
1288 /*******************/ |
|
1289 |
|
1290 //SYM_REF0(LD_operator_c) |
|
1291 void *visit_expression_type_c::visit(LD_operator_c *symbol) { |
|
1292 if (0 == il_parenthesis_level) |
|
1293 il_error = false; |
|
1294 |
|
1295 if(il_operand_type == NULL) |
|
1296 STAGE3_ERROR(symbol, symbol, "LD operator requires an operand."); |
|
1297 il_default_variable_type = il_operand_type; |
|
1298 return NULL; |
|
1299 } |
|
1300 |
|
1301 // SYM_REF0(LDN_operator_c) |
|
1302 void *visit_expression_type_c::visit(LDN_operator_c *symbol) { |
|
1303 if(il_operand_type == NULL) |
|
1304 STAGE3_ERROR(symbol, symbol, "LDN operator requires an operand."); |
|
1305 if(!is_ANY_BIT_compatible(il_operand_type)) |
|
1306 STAGE3_ERROR(symbol, il_operand, "invalid data type of LDN operand, should be of type ANY_BIT."); |
|
1307 il_default_variable_type = il_operand_type; |
|
1308 return NULL; |
|
1309 } |
|
1310 |
|
1311 // SYM_REF0(ST_operator_c) |
|
1312 void *visit_expression_type_c::visit(ST_operator_c *symbol) { |
|
1313 verify_null(symbol); |
|
1314 |
|
1315 if(!is_valid_assignment(il_operand_type, il_default_variable_type)) |
|
1316 STAGE3_ERROR(symbol, symbol, "Type mismatch in ST operation."); |
|
1317 /* TODO: check whether il_operand_type is an LVALUE !! */ |
|
1318 /* data type of il_default_variable_type is unchanged... */ |
|
1319 // il_default_variable_type = il_default_variable_type; |
|
1320 return NULL; |
|
1321 } |
|
1322 |
|
1323 // SYM_REF0(STN_operator_c) |
|
1324 void *visit_expression_type_c::visit(STN_operator_c *symbol) { |
|
1325 verify_null(symbol); |
|
1326 if(!is_valid_assignment(il_operand_type, il_default_variable_type)) |
|
1327 STAGE3_ERROR(symbol, symbol, "Type mismatch in ST operation."); |
|
1328 /* TODO: check whether il_operand_type is an LVALUE !! */ |
|
1329 if(!is_ANY_BIT_compatible(il_default_variable_type)) |
|
1330 STAGE3_ERROR(symbol, symbol, "invalid data type of il_default_variable for STN operand, should be of type ANY_BIT."); |
|
1331 if(!is_ANY_BIT_compatible(il_operand_type)) |
|
1332 STAGE3_ERROR(symbol, il_operand, "invalid data type of STN operand, should be of type ANY_BIT."); |
|
1333 /* data type of il_default_variable_type is unchanged... */ |
|
1334 // il_default_variable_type = il_default_variable_type; |
|
1335 return NULL; |
|
1336 } |
|
1337 |
|
1338 //SYM_REF0(NOT_operator_c) |
|
1339 void *visit_expression_type_c::visit(NOT_operator_c *symbol) { |
|
1340 if(il_operand_type != NULL){ |
|
1341 STAGE3_ERROR(symbol, il_operand, "NOT operator may not have an operand."); |
|
1342 return NULL; |
|
1343 } |
|
1344 if(il_default_variable_type == NULL) { |
|
1345 STAGE3_ERROR(symbol, symbol, "Il default variable should not be NULL."); |
|
1346 return NULL; |
|
1347 } |
|
1348 if(!is_ANY_BIT_compatible(il_default_variable_type)) { |
|
1349 STAGE3_ERROR(symbol, symbol, "Il default variable should be of type ANY_BIT."); |
|
1350 return NULL; |
|
1351 } |
|
1352 /* data type of il_default_variable_type is unchanged... */ |
|
1353 // il_default_variable_type = il_default_variable_type; |
|
1354 return NULL; |
|
1355 } |
|
1356 |
|
1357 // SYM_REF0(S_operator_c) |
|
1358 void *visit_expression_type_c::visit(S_operator_c *symbol) { |
|
1359 verify_null(symbol); |
|
1360 if (!is_BOOL_type(il_default_variable_type)) {STAGE3_ERROR(symbol, symbol, "IL default variable should be BOOL type.");} |
|
1361 if (!is_BOOL_type(il_operand_type)) {STAGE3_ERROR(symbol, il_operand, "operator S requires operand of type BOOL.");} |
|
1362 /* TODO: check whether il_operand_type is an LVALUE !! */ |
|
1363 /* data type of il_default_variable_type is unchanged... */ |
|
1364 // il_default_variable_type = il_default_variable_type; |
|
1365 return NULL; |
|
1366 } |
|
1367 |
|
1368 // SYM_REF0(R_operator_c) |
|
1369 void *visit_expression_type_c::visit(R_operator_c *symbol) { |
|
1370 verify_null(symbol); |
|
1371 if (!is_BOOL_type(il_default_variable_type)) {STAGE3_ERROR(symbol, symbol, "IL default variable should be BOOL type.");} |
|
1372 if (!is_BOOL_type(il_operand_type)) {STAGE3_ERROR(symbol, il_operand, "operator R requires operand of type BOOL.");} |
|
1373 /* TODO: check whether il_operand_type is an LVALUE !! */ |
|
1374 /* data type of il_default_variable_type is unchanged... */ |
|
1375 // il_default_variable_type = il_default_variable_type; |
|
1376 return NULL; |
|
1377 } |
|
1378 |
|
1379 |
|
1380 // SYM_REF0(S1_operator_c) |
|
1381 void *visit_expression_type_c::visit(S1_operator_c *symbol){ |
|
1382 check_il_fbcall(symbol, "S1"); |
|
1383 return NULL; |
|
1384 } |
|
1385 |
|
1386 // SYM_REF0(R1_operator_c) |
|
1387 void *visit_expression_type_c::visit(R1_operator_c *symbol) { |
|
1388 check_il_fbcall(symbol, "R1"); |
|
1389 return NULL; |
|
1390 } |
|
1391 |
|
1392 // SYM_REF0(CLK_operator_c) |
|
1393 void *visit_expression_type_c::visit(CLK_operator_c *symbol) { |
|
1394 check_il_fbcall(symbol, "CLK"); |
|
1395 return NULL; |
|
1396 } |
|
1397 |
|
1398 // SYM_REF0(CU_operator_c) |
|
1399 void *visit_expression_type_c::visit(CU_operator_c *symbol) { |
|
1400 check_il_fbcall(symbol, "CU"); |
|
1401 return NULL; |
|
1402 } |
|
1403 |
|
1404 // SYM_REF0(CD_operator_c) |
|
1405 void *visit_expression_type_c::visit(CD_operator_c *symbol) { |
|
1406 check_il_fbcall(symbol, "CD"); |
|
1407 return NULL; |
|
1408 } |
|
1409 |
|
1410 // SYM_REF0(PV_operator_c) |
|
1411 void *visit_expression_type_c::visit(PV_operator_c *symbol) { |
|
1412 check_il_fbcall(symbol, "PV"); |
|
1413 return NULL; |
|
1414 } |
|
1415 |
|
1416 // SYM_REF0(IN_operator_c) |
|
1417 void *visit_expression_type_c::visit(IN_operator_c *symbol) { |
|
1418 check_il_fbcall(symbol, "IN"); |
|
1419 return NULL; |
|
1420 } |
|
1421 |
|
1422 // SYM_REF0(PT_operator_c) |
|
1423 void *visit_expression_type_c::visit(PT_operator_c *symbol) { |
|
1424 check_il_fbcall(symbol, "PT"); |
|
1425 return NULL; |
|
1426 } |
|
1427 |
|
1428 //SYM_REF0(AND_operator_c) |
|
1429 void *visit_expression_type_c::visit(AND_operator_c *symbol) { |
|
1430 verify_null(symbol); |
|
1431 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1432 symbol , il_operand); |
|
1433 return NULL; |
|
1434 } |
|
1435 |
|
1436 //SYM_REF0(OR_operator_c) |
|
1437 void *visit_expression_type_c::visit(OR_operator_c *symbol) { |
|
1438 verify_null(symbol); |
|
1439 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1440 symbol , il_operand); |
|
1441 return NULL; |
|
1442 } |
|
1443 |
|
1444 //SYM_REF0(XOR_operator_c) |
|
1445 void *visit_expression_type_c::visit(XOR_operator_c *symbol) { |
|
1446 verify_null(symbol); |
|
1447 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1448 symbol , il_operand); |
|
1449 return NULL; |
|
1450 } |
|
1451 |
|
1452 // SYM_REF0(ANDN_operator_c) |
|
1453 void *visit_expression_type_c::visit(ANDN_operator_c *symbol) { |
|
1454 verify_null(symbol); |
|
1455 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1456 symbol , il_operand); |
|
1457 return NULL; |
|
1458 } |
|
1459 |
|
1460 // SYM_REF0(ORN_operator_c) |
|
1461 void *visit_expression_type_c::visit(ORN_operator_c *symbol) { |
|
1462 verify_null(symbol); |
|
1463 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1464 symbol , il_operand); |
|
1465 return NULL; |
|
1466 } |
|
1467 |
|
1468 // SYM_REF0(XORN_operator_c) |
|
1469 void *visit_expression_type_c::visit(XORN_operator_c *symbol) { |
|
1470 verify_null(symbol); |
|
1471 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_BIT_compatible, |
|
1472 symbol , il_operand); |
|
1473 return NULL; |
|
1474 } |
|
1475 |
|
1476 // SYM_REF0(ADD_operator_c) |
|
1477 void *visit_expression_type_c::visit(ADD_operator_c *symbol) { |
|
1478 verify_null(symbol); |
|
1479 symbol_c *left_type = il_default_variable_type; |
|
1480 symbol_c *right_type = il_operand_type; |
|
1481 |
|
1482 /* The following is not required, it is already handled by compute_expression() ... */ |
|
1483 /* |
|
1484 if (is_type(left_type, time_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1485 il_default_variable_type = &time_type_name; |
|
1486 */ |
|
1487 |
|
1488 if (is_type(left_type, tod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1489 il_default_variable_type = &tod_type_name; |
|
1490 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1491 il_default_variable_type = &tod_type_name; |
|
1492 else if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1493 il_default_variable_type = &tod_type_name; |
|
1494 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1495 il_default_variable_type = &safetod_type_name; |
|
1496 |
|
1497 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1498 il_default_variable_type = &dt_type_name; |
|
1499 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1500 il_default_variable_type = &dt_type_name; |
|
1501 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1502 il_default_variable_type = &dt_type_name; |
|
1503 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1504 il_default_variable_type = &safedt_type_name; |
|
1505 |
|
1506 else il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_MAGNITUDE_compatible, |
|
1507 symbol , il_operand); |
|
1508 return NULL; |
|
1509 } |
|
1510 |
|
1511 // SYM_REF0(SUB_operator_c) |
|
1512 void *visit_expression_type_c::visit(SUB_operator_c *symbol) { |
|
1513 verify_null(symbol); |
|
1514 symbol_c *left_type = il_default_variable_type; |
|
1515 symbol_c *right_type = il_operand_type;; |
|
1516 |
|
1517 /* The following is not required, it is already handled by compute_expression() ... */ |
|
1518 /* |
|
1519 if (typeid(*left_type) == typeid(time_type_name_c) && typeid(*right_type) == typeid(time_type_name_c)) |
|
1520 il_default_variable_type = &time_type_name; |
|
1521 */ |
|
1522 |
|
1523 if (is_type(left_type, tod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1524 il_default_variable_type = &tod_type_name; |
|
1525 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1526 il_default_variable_type = &tod_type_name; |
|
1527 else if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1528 il_default_variable_type = &tod_type_name; |
|
1529 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1530 il_default_variable_type = &safetod_type_name; |
|
1531 |
|
1532 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1533 il_default_variable_type = &dt_type_name; |
|
1534 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1535 il_default_variable_type = &dt_type_name; |
|
1536 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1537 il_default_variable_type = &dt_type_name; |
|
1538 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1539 il_default_variable_type = &safedt_type_name; |
|
1540 |
|
1541 else if (is_type(left_type, date_type_name_c) && is_type(right_type, date_type_name_c)) |
|
1542 il_default_variable_type = &time_type_name; |
|
1543 else if (is_type(left_type, safedate_type_name_c) && is_type(right_type, date_type_name_c)) |
|
1544 il_default_variable_type = &time_type_name; |
|
1545 else if (is_type(left_type, date_type_name_c) && is_type(right_type, safedate_type_name_c)) |
|
1546 il_default_variable_type = &time_type_name; |
|
1547 else if (is_type(left_type, safedate_type_name_c) && is_type(right_type, safedate_type_name_c)) |
|
1548 il_default_variable_type = &safetime_type_name; |
|
1549 |
|
1550 else if (is_type(left_type, tod_type_name_c) && is_type(right_type, tod_type_name_c)) |
|
1551 il_default_variable_type = &time_type_name; |
|
1552 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, tod_type_name_c)) |
|
1553 il_default_variable_type = &time_type_name; |
|
1554 else if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetod_type_name_c)) |
|
1555 il_default_variable_type = &time_type_name; |
|
1556 else if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetod_type_name_c)) |
|
1557 il_default_variable_type = &safetime_type_name; |
|
1558 |
|
1559 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, dt_type_name_c)) |
|
1560 il_default_variable_type = &time_type_name; |
|
1561 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, dt_type_name_c)) |
|
1562 il_default_variable_type = &time_type_name; |
|
1563 else if (is_type(left_type, dt_type_name_c) && is_type(right_type, safedt_type_name_c)) |
|
1564 il_default_variable_type = &time_type_name; |
|
1565 else if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safedt_type_name_c)) |
|
1566 il_default_variable_type = &safetime_type_name; |
|
1567 |
|
1568 else il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_MAGNITUDE_compatible, |
|
1569 symbol , il_operand); |
|
1570 return NULL; |
|
1571 } |
|
1572 |
|
1573 // SYM_REF0(MUL_operator_c) |
|
1574 void *visit_expression_type_c::visit(MUL_operator_c *symbol) { |
|
1575 verify_null(symbol); |
|
1576 symbol_c *left_type = il_default_variable_type; |
|
1577 symbol_c *right_type = il_operand_type; |
|
1578 |
|
1579 if (is_type(left_type, time_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1580 il_default_variable_type = &time_type_name; |
|
1581 else if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_type(right_type)) |
|
1582 il_default_variable_type = &time_type_name; |
|
1583 else if (is_type(left_type, safetime_type_name_c) && is_ANY_SAFENUM_type(right_type)) |
|
1584 il_default_variable_type = &safetime_type_name; |
|
1585 /* Since we have already checked for ANY_NUM_type and ANY_SAFENUM_type in the previous lines, |
|
1586 * this next line is really only to check for integers/reals of undefined type on 'right_type'... |
|
1587 */ |
|
1588 else if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1589 il_default_variable_type = &safetime_type_name; |
|
1590 |
|
1591 else il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_NUM_compatible, |
|
1592 symbol , il_operand); |
|
1593 return NULL; |
|
1594 } |
|
1595 |
|
1596 // SYM_REF0(DIV_operator_c) |
|
1597 void *visit_expression_type_c::visit(DIV_operator_c *symbol) { |
|
1598 verify_null(symbol); |
|
1599 symbol_c *left_type = il_default_variable_type; |
|
1600 symbol_c *right_type = il_operand_type; |
|
1601 |
|
1602 if (is_type(left_type, time_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1603 il_default_variable_type = &time_type_name; |
|
1604 else if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_type(right_type)) |
|
1605 il_default_variable_type = &time_type_name; |
|
1606 else if (is_type(left_type, safetime_type_name_c) && is_ANY_SAFENUM_type(right_type)) |
|
1607 il_default_variable_type = &safetime_type_name; |
|
1608 /* Since we have already checked for ANY_NUM_type and ANY_SAFENUM_type in the previous lines, |
|
1609 * this next line is really only to check for integers/reals of undefined type on 'right_type'... |
|
1610 */ |
|
1611 else if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1612 il_default_variable_type = &safetime_type_name; |
|
1613 |
|
1614 else il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_NUM_compatible, |
|
1615 symbol , il_operand); |
|
1616 return NULL; |
|
1617 } |
|
1618 |
|
1619 // SYM_REF0(MOD_operator_c) |
|
1620 void *visit_expression_type_c::visit(MOD_operator_c *symbol) { |
|
1621 verify_null(symbol); |
|
1622 il_default_variable_type = compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_INT_compatible, |
|
1623 symbol , il_operand); |
|
1624 return NULL; |
|
1625 } |
|
1626 |
|
1627 // SYM_REF0(GT_operator_c) |
|
1628 void *visit_expression_type_c::visit(GT_operator_c *symbol) { |
|
1629 verify_null(symbol); |
|
1630 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1631 symbol , il_operand); |
|
1632 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1633 return NULL; |
|
1634 } |
|
1635 |
|
1636 //SYM_REF0(GE_operator_c) |
|
1637 void *visit_expression_type_c::visit(GE_operator_c *symbol) { |
|
1638 verify_null(symbol); |
|
1639 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1640 symbol , il_operand); |
|
1641 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1642 return NULL; |
|
1643 } |
|
1644 |
|
1645 //SYM_REF0(EQ_operator_c) |
|
1646 void *visit_expression_type_c::visit(EQ_operator_c *symbol) { |
|
1647 verify_null(symbol); |
|
1648 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1649 symbol , il_operand); |
|
1650 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1651 return NULL; |
|
1652 } |
|
1653 |
|
1654 //SYM_REF0(LT_operator_c) |
|
1655 void *visit_expression_type_c::visit(LT_operator_c *symbol) { |
|
1656 verify_null(symbol); |
|
1657 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1658 symbol , il_operand); |
|
1659 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1660 return NULL; |
|
1661 } |
|
1662 |
|
1663 //SYM_REF0(LE_operator_c) |
|
1664 void *visit_expression_type_c::visit(LE_operator_c *symbol) { |
|
1665 verify_null(symbol); |
|
1666 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1667 symbol , il_operand); |
|
1668 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1669 return NULL; |
|
1670 } |
|
1671 |
|
1672 //SYM_REF0(NE_operator_c) |
|
1673 void *visit_expression_type_c::visit(NE_operator_c *symbol) { |
|
1674 verify_null(symbol); |
|
1675 compute_expression(il_default_variable_type, il_operand_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, |
|
1676 symbol , il_operand); |
|
1677 il_default_variable_type = &search_expression_type_c::bool_type_name; |
|
1678 return NULL; |
|
1679 } |
|
1680 |
|
1681 // SYM_REF0(CAL_operator_c) |
|
1682 void *visit_expression_type_c::visit(CAL_operator_c *symbol) { |
|
1683 return NULL; |
|
1684 } |
|
1685 |
|
1686 // SYM_REF0(CALC_operator_c) |
|
1687 void *visit_expression_type_c::visit(CALC_operator_c *symbol) { |
|
1688 if(il_default_variable_type == NULL) |
|
1689 STAGE3_ERROR(symbol, symbol, "CALC: il default variable should not be NULL."); |
|
1690 if (!is_BOOL_type(il_default_variable_type)) |
|
1691 STAGE3_ERROR(symbol, symbol, "CALC operator requires il_default_variable to be of type BOOL."); |
|
1692 return NULL; |
|
1693 } |
|
1694 |
|
1695 // SYM_REF0(CALCN_operator_c) |
|
1696 void *visit_expression_type_c::visit(CALCN_operator_c *symbol) { |
|
1697 if(il_default_variable_type == NULL) |
|
1698 STAGE3_ERROR(symbol, symbol, "CALCN: il_default_variable should not be NULL."); |
|
1699 if (!is_BOOL_type(il_default_variable_type)) |
|
1700 STAGE3_ERROR(symbol, symbol, "CALCN operator requires il_default_variable to be of type BOOL."); |
|
1701 return NULL; |
|
1702 } |
|
1703 |
|
1704 // SYM_REF0(RET_operator_c) |
|
1705 void *visit_expression_type_c::visit(RET_operator_c *symbol) { |
|
1706 return NULL; |
|
1707 } |
|
1708 |
|
1709 // SYM_REF0(RETC_operator_c) |
|
1710 void *visit_expression_type_c::visit(RETC_operator_c *symbol) { |
|
1711 if(il_default_variable_type == NULL) |
|
1712 STAGE3_ERROR(symbol, symbol, "RETC: il default variable should not be NULL."); |
|
1713 if (!is_BOOL_type(il_default_variable_type)) |
|
1714 STAGE3_ERROR(symbol, symbol, "RETC operator requires il_default_variable to be of type BOOL."); |
|
1715 return NULL; |
|
1716 } |
|
1717 |
|
1718 // SYM_REF0(RETCN_operator_c) |
|
1719 void *visit_expression_type_c::visit(RETCN_operator_c *symbol) { |
|
1720 if(il_default_variable_type == NULL) |
|
1721 STAGE3_ERROR(symbol, symbol, "RETCN: il_default_variable should not be NULL."); |
|
1722 if (!is_BOOL_type(il_default_variable_type)) |
|
1723 STAGE3_ERROR(symbol, symbol, "RETCN operator requires il_default_variable to be of type BOOL."); |
|
1724 return NULL; |
|
1725 } |
|
1726 |
|
1727 // SYM_REF0(JMP_operator_c) |
|
1728 void *visit_expression_type_c::visit(JMP_operator_c *symbol){ |
|
1729 return NULL; |
|
1730 } |
|
1731 |
|
1732 // SYM_REF0(JMPC_operator_c) |
|
1733 void *visit_expression_type_c::visit(JMPC_operator_c *symbol) { |
|
1734 if(il_default_variable_type == NULL) |
|
1735 STAGE3_ERROR(symbol, symbol, "JMPC: il default variable should not be NULL."); |
|
1736 if (!is_BOOL_type(il_default_variable_type)) |
|
1737 STAGE3_ERROR(symbol, symbol, "JMPC operator requires il_default_variable to be of type BOOL."); |
|
1738 return NULL; |
|
1739 } |
|
1740 |
|
1741 // SYM_REF0(JMPCN_operator_c) |
|
1742 void *visit_expression_type_c::visit(JMPCN_operator_c *symbol) { |
|
1743 if(il_default_variable_type == NULL) |
|
1744 STAGE3_ERROR(symbol, symbol, "JMPCN: il_default_variable should not be NULL."); |
|
1745 if (!is_BOOL_type(il_default_variable_type)) |
|
1746 STAGE3_ERROR(symbol, symbol, "JMPCN operator requires il_default_variable to be of type BOOL."); |
|
1747 return NULL; |
|
1748 } |
|
1749 |
|
1750 /* Symbol class handled together with function call checks */ |
|
1751 /* any_identifier ASSIGN */ |
|
1752 // SYM_REF1(il_assign_operator_c, variable_name) |
|
1753 // void *visit_expression_type_c::visit(il_assign_operator_c *symbol, variable_name); |
|
1754 |
|
1755 /* Symbol class handled together with function call checks */ |
|
1756 /*| [NOT] any_identifier SENDTO */ |
|
1757 // SYM_REF2(il_assign_out_operator_c, option, variable_name) |
|
1758 // void *visit_expression_type_c::visit(il_assign_operator_c *symbol, option, variable_name); |
|
1759 |
|
1760 |
|
1761 |
|
1762 |
|
1763 |
|
1764 /***************************************/ |
|
1765 /* B.3 - Language ST (Structured Text) */ |
|
1766 /***************************************/ |
|
1767 /***********************/ |
|
1768 /* B 3.1 - Expressions */ |
|
1769 /***********************/ |
|
1770 |
|
1771 void *visit_expression_type_c::visit(or_expression_c *symbol) { |
|
1772 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1773 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1774 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_BIT_compatible, symbol->l_exp, symbol->r_exp); |
|
1775 } |
|
1776 |
|
1777 |
|
1778 void *visit_expression_type_c::visit(xor_expression_c *symbol) { |
|
1779 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1780 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1781 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_BIT_compatible, symbol->l_exp, symbol->r_exp); |
|
1782 } |
|
1783 |
|
1784 |
|
1785 void *visit_expression_type_c::visit(and_expression_c *symbol) { |
|
1786 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1787 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1788 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_BIT_compatible, symbol->l_exp, symbol->r_exp); |
|
1789 } |
|
1790 |
|
1791 |
|
1792 void *visit_expression_type_c::visit(equ_expression_c *symbol) { |
|
1793 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1794 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1795 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_OR_ENUMERATED_compatible, symbol->l_exp, symbol->r_exp); |
|
1796 return &search_expression_type_c::bool_type_name; |
|
1797 } |
|
1798 |
|
1799 |
|
1800 void *visit_expression_type_c::visit(notequ_expression_c *symbol) { |
|
1801 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1802 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1803 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_OR_ENUMERATED_compatible, symbol->l_exp, symbol->r_exp); |
|
1804 return &search_expression_type_c::bool_type_name; |
|
1805 } |
|
1806 |
|
1807 |
|
1808 void *visit_expression_type_c::visit(lt_expression_c *symbol) { |
|
1809 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1810 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1811 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, symbol->l_exp, symbol->r_exp); |
|
1812 return &search_expression_type_c::bool_type_name; |
|
1813 } |
|
1814 |
|
1815 |
|
1816 void *visit_expression_type_c::visit(gt_expression_c *symbol) { |
|
1817 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1818 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1819 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, symbol->l_exp, symbol->r_exp); |
|
1820 return &search_expression_type_c::bool_type_name; |
|
1821 } |
|
1822 |
|
1823 |
|
1824 void *visit_expression_type_c::visit(le_expression_c *symbol) { |
|
1825 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1826 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1827 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, symbol->l_exp, symbol->r_exp); |
|
1828 return &search_expression_type_c::bool_type_name; |
|
1829 } |
|
1830 |
|
1831 |
|
1832 void *visit_expression_type_c::visit(ge_expression_c *symbol) { |
|
1833 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1834 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1835 compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_ELEMENTARY_compatible, symbol->l_exp, symbol->r_exp); |
|
1836 return &search_expression_type_c::bool_type_name; |
|
1837 } |
|
1838 |
|
1839 |
|
1840 void *visit_expression_type_c::visit(add_expression_c *symbol) { |
|
1841 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1842 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1843 |
|
1844 /* The following is already checked in compute_expression */ |
|
1845 /* |
|
1846 if (is_type(left_type, time_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1847 return (void *)&time_type_name; |
|
1848 */ |
|
1849 |
|
1850 if (is_type(left_type, tod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1851 return (void *)&tod_type_name; |
|
1852 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1853 return (void *)&tod_type_name; |
|
1854 if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1855 return (void *)&tod_type_name; |
|
1856 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1857 return (void *)&safetod_type_name; |
|
1858 |
|
1859 if (is_type(left_type, dt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1860 return (void *)&dt_type_name; |
|
1861 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1862 return (void *)&dt_type_name; |
|
1863 if (is_type(left_type, dt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1864 return (void *)&dt_type_name; |
|
1865 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1866 return (void *)&safedt_type_name; |
|
1867 |
|
1868 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_MAGNITUDE_compatible, symbol->l_exp, symbol->r_exp); |
|
1869 } |
|
1870 |
|
1871 |
|
1872 void *visit_expression_type_c::visit(sub_expression_c *symbol) { |
|
1873 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1874 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1875 |
|
1876 /* The following is already checked in compute_expression */ |
|
1877 /* |
|
1878 if (is_type(left_type, time_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1879 return (void *)&time_type_name; |
|
1880 */ |
|
1881 |
|
1882 if (is_type(left_type, tod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1883 return (void *)&tod_type_name; |
|
1884 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1885 return (void *)&tod_type_name; |
|
1886 if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1887 return (void *)&tod_type_name; |
|
1888 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1889 return (void *)&safetod_type_name; |
|
1890 |
|
1891 if (is_type(left_type, dt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1892 return (void *)&dt_type_name; |
|
1893 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, time_type_name_c)) |
|
1894 return (void *)&dt_type_name; |
|
1895 if (is_type(left_type, dt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1896 return (void *)&dt_type_name; |
|
1897 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safetime_type_name_c)) |
|
1898 return (void *)&safedt_type_name; |
|
1899 |
|
1900 if (is_type(left_type, tod_type_name_c) && is_type(right_type, tod_type_name_c)) |
|
1901 return (void *)&time_type_name; |
|
1902 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, tod_type_name_c)) |
|
1903 return (void *)&time_type_name; |
|
1904 if (is_type(left_type, tod_type_name_c) && is_type(right_type, safetod_type_name_c)) |
|
1905 return (void *)&time_type_name; |
|
1906 if (is_type(left_type, safetod_type_name_c) && is_type(right_type, safetod_type_name_c)) |
|
1907 return (void *)&safetime_type_name; |
|
1908 |
|
1909 if (is_type(left_type, date_type_name_c) && is_type(right_type, date_type_name_c)) |
|
1910 return (void *)&time_type_name; |
|
1911 if (is_type(left_type, safedate_type_name_c) && is_type(right_type, date_type_name_c)) |
|
1912 return (void *)&time_type_name; |
|
1913 if (is_type(left_type, date_type_name_c) && is_type(right_type, safedate_type_name_c)) |
|
1914 return (void *)&time_type_name; |
|
1915 if (is_type(left_type, safedate_type_name_c) && is_type(right_type, safedate_type_name_c)) |
|
1916 return (void *)&safetime_type_name; |
|
1917 |
|
1918 if (is_type(left_type, dt_type_name_c) && is_type(right_type, dt_type_name_c)) |
|
1919 return (void *)&time_type_name; |
|
1920 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, dt_type_name_c)) |
|
1921 return (void *)&time_type_name; |
|
1922 if (is_type(left_type, dt_type_name_c) && is_type(right_type, safedt_type_name_c)) |
|
1923 return (void *)&time_type_name; |
|
1924 if (is_type(left_type, safedt_type_name_c) && is_type(right_type, safedt_type_name_c)) |
|
1925 return (void *)&safetime_type_name; |
|
1926 |
|
1927 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_MAGNITUDE_compatible, symbol->l_exp, symbol->r_exp); |
|
1928 } |
|
1929 |
|
1930 |
|
1931 void *visit_expression_type_c::visit(mul_expression_c *symbol) { |
|
1932 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1933 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1934 |
|
1935 if (is_type(left_type, time_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1936 return (void *)&time_type_name; |
|
1937 if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_type(right_type)) |
|
1938 return (void *)&time_type_name; |
|
1939 if (is_type(left_type, safetime_type_name_c) && is_ANY_SAFENUM_type(right_type)) |
|
1940 return (void *)&safetime_type_name; |
|
1941 /* Since we have already checked for ANY_NUM_type and ANY_SAFENUM_type in the previous lines, |
|
1942 * this next line is really only to check for integers/reals of undefined type on 'right_type'... |
|
1943 */ |
|
1944 if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1945 return (void *)&safetime_type_name; |
|
1946 |
|
1947 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_NUM_compatible, symbol->l_exp, symbol->r_exp); |
|
1948 } |
|
1949 |
|
1950 |
|
1951 void *visit_expression_type_c::visit(div_expression_c *symbol) { |
|
1952 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1953 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1954 |
|
1955 if (is_type(left_type, time_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1956 return (void *)&time_type_name; |
|
1957 if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_type(right_type)) |
|
1958 return (void *)&time_type_name; |
|
1959 if (is_type(left_type, safetime_type_name_c) && is_ANY_SAFENUM_type(right_type)) |
|
1960 return (void *)&safetime_type_name; |
|
1961 /* Since we have already checked for ANY_NUM_type and ANY_SAFENUM_type in the previous lines, |
|
1962 * this next line is really only to check for integers/reals of undefined type on 'right_type'... |
|
1963 */ |
|
1964 if (is_type(left_type, safetime_type_name_c) && is_ANY_NUM_compatible(right_type)) |
|
1965 return (void *)&safetime_type_name; |
|
1966 |
|
1967 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_NUM_compatible, symbol->l_exp, symbol->r_exp); |
|
1968 } |
|
1969 |
|
1970 |
|
1971 void *visit_expression_type_c::visit(mod_expression_c *symbol) { |
|
1972 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1973 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1974 return compute_expression(left_type, right_type, &visit_expression_type_c::is_ANY_INT_compatible, symbol->l_exp, symbol->r_exp); |
|
1975 } |
|
1976 |
|
1977 |
|
1978 void *visit_expression_type_c::visit(power_expression_c *symbol) { |
|
1979 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
1980 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
1981 if (!is_ANY_REAL_compatible(left_type)) |
|
1982 STAGE3_ERROR(symbol->l_exp, symbol->l_exp, "first operand of ** operator has invalid data type, should be of type ANY_REAL."); |
|
1983 if (!is_ANY_NUM_compatible(right_type)) |
|
1984 STAGE3_ERROR(symbol->r_exp, symbol->r_exp, "second operand of ** operator has invalid data type, should be of type ANY_NUM."); |
|
1985 |
|
1986 return (void *)left_type; |
|
1987 } |
|
1988 |
|
1989 |
|
1990 void *visit_expression_type_c::visit(neg_expression_c *symbol) { |
|
1991 symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
1992 if (!is_ANY_MAGNITUDE_compatible(exp_type)) |
|
1993 STAGE3_ERROR(symbol, symbol, "operand of negate expression '-' has invalid data type, should be of type ANY_MAGNITUDE."); |
|
1994 |
|
1995 return exp_type; |
|
1996 } |
|
1997 |
|
1998 |
|
1999 void *visit_expression_type_c::visit(not_expression_c *symbol) { |
|
2000 symbol_c *type = base_type((symbol_c *)symbol->exp->accept(*this)); |
|
2001 return compute_expression(type, type, &visit_expression_type_c::is_ANY_BIT_compatible, NULL, symbol->exp); |
|
2002 } |
|
2003 |
|
2004 |
|
2005 void *visit_expression_type_c::visit(function_invocation_c *symbol) { |
|
2006 function_symtable_t::iterator lower = function_symtable.lower_bound(symbol->function_name); |
|
2007 function_symtable_t::iterator upper = function_symtable.upper_bound(symbol->function_name); |
|
2008 if (lower == function_symtable.end()) ERROR; |
|
2009 |
|
2010 function_symtable_t::iterator second = lower; |
|
2011 second++; |
|
2012 if (second == upper) { |
|
2013 /* call to a function that is not overloaded. */ |
|
2014 /* now check the semantics of the function call... */ |
|
2015 /* If the syntax parser is working correctly, exactly one of the |
|
2016 * following two symbols will be NULL, while the other is != NULL. |
|
2017 */ |
|
2018 function_declaration_c *f_decl = function_symtable.get_value(lower); |
|
2019 if (symbol-> formal_param_list != NULL) check_formal_call (symbol, f_decl); |
|
2020 if (symbol->nonformal_param_list != NULL) check_nonformal_call(symbol, f_decl); |
|
2021 /* Store the pointer to the declaration of the function being called. |
|
2022 * This data will be used by stage 4 to call the correct function. |
|
2023 * Mostly needed to disambiguate overloaded functions... |
|
2024 * See comments in absyntax.def for more details |
|
2025 */ |
|
2026 symbol->called_function_declaration = f_decl; |
|
2027 return base_type(f_decl->type_name); |
|
2028 } |
|
2029 |
|
2030 /* This is a call to an overloaded function... */ |
|
2031 if (debug) printf("visit_expression_type_c::visit(function_invocation_c *symbol): FOUND CALL TO OVERLOADED FUNCTION!!\n"); |
|
2032 for(; lower != upper; lower++) { |
|
2033 if (debug) printf("visit_expression_type_c::visit(function_invocation_c *symbol): FOUND CALL TO OVERLOADED FUNCTION!! iterating...\n"); |
|
2034 int error_count = 0; |
|
2035 function_declaration_c *f_decl = function_symtable.get_value(lower); |
|
2036 if (symbol-> formal_param_list != NULL) check_formal_call (symbol, f_decl, &error_count); |
|
2037 if (symbol->nonformal_param_list != NULL) check_nonformal_call(symbol, f_decl, false, &error_count); |
|
2038 if (0 == error_count) { |
|
2039 /* Store the pointer to the declaration of the function being called. |
|
2040 * This data will be used by stage 4 to call the correct function. |
|
2041 * Mostly needed to disambiguate overloaded functions... |
|
2042 * See comments in absyntax.def for more details |
|
2043 */ |
|
2044 symbol->called_function_declaration = f_decl; |
|
2045 return base_type(f_decl->type_name); |
|
2046 } |
|
2047 } |
|
2048 |
|
2049 /* No compatible function was found for this function call */ |
|
2050 STAGE3_ERROR(symbol, symbol, "Call to an overloaded function with invalid parameter type."); |
|
2051 return NULL; |
|
2052 } |
|
2053 |
|
2054 /********************/ |
|
2055 /* B 3.2 Statements */ |
|
2056 /********************/ |
|
2057 // SYM_LIST(statement_list_c) |
|
2058 /* The visitor of the base class search_visitor_c will handle calling each instruction in the list. |
|
2059 * We do not need to do anything here... |
|
2060 */ |
|
2061 // void *visit_expression_type_c::visit(statement_list_c *symbol) |
|
2062 |
|
2063 |
|
2064 /*********************************/ |
|
2065 /* B 3.2.1 Assignment Statements */ |
|
2066 /*********************************/ |
|
2067 |
|
2068 void *visit_expression_type_c::visit(assignment_statement_c *symbol) { |
|
2069 symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
|
2070 symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
|
2071 |
|
2072 if (debug) { |
|
2073 printf("visit_expression_type_c::visit(assignment_statement_c) called. Checking --->"); |
|
2074 symbolic_variable_c *hi = dynamic_cast<symbolic_variable_c *>(symbol->l_exp); |
|
2075 if (hi != NULL) { |
|
2076 identifier_c *hi1 = dynamic_cast<identifier_c *>(hi->var_name); |
|
2077 if (hi1 != NULL) printf("%s", hi1->value); |
|
2078 } |
|
2079 printf(" := "); |
|
2080 hex_integer_c *hi2 = dynamic_cast<hex_integer_c *>(symbol->r_exp); |
|
2081 if (hi2 != NULL) printf("%s", hi2->value); |
|
2082 printf("\n"); |
|
2083 } // if (debug) |
|
2084 |
|
2085 if (NULL == left_type) { |
|
2086 STAGE3_ERROR(symbol->l_exp, symbol->l_exp, "Could not determine data type of expression (undefined variable, constant, or structure element?).\n"); |
|
2087 } else if (NULL == right_type) { |
|
2088 STAGE3_ERROR(symbol->r_exp, symbol->r_exp, "Could not determine data type of expression (undefined variable, constant, or structure element?).\n"); |
|
2089 } else if (!is_valid_assignment(left_type, right_type)) |
|
2090 STAGE3_ERROR(symbol, symbol, "data type mismatch in assignment statement!\n"); |
|
2091 |
|
2092 return NULL; |
|
2093 } |
|
2094 |
|
2095 |
|
2096 |
|
2097 /*****************************************/ |
|
2098 /* B 3.2.2 Subprogram Control Statements */ |
|
2099 /*****************************************/ |
|
2100 |
|
2101 /* RETURN */ |
|
2102 // SYM_REF0(return_statement_c) |
|
2103 |
|
2104 |
|
2105 /* fb_name '(' [param_assignment_list] ')' */ |
|
2106 /* param_assignment_list -> may be NULL ! */ |
|
2107 // SYM_REF3(fb_invocation_c, fb_name, formal_param_list, nonformal_param_list) |
|
2108 void *visit_expression_type_c::visit(fb_invocation_c *symbol) { |
|
2109 symbol_c *fb_decl = search_varfb_instance_type->get_basetype_decl(symbol->fb_name); |
|
2110 /* The following should never occur. The function block must be defined, |
|
2111 * and the FB type being called MUST be in the symtable... |
|
2112 * This was all already checked at stage 2! |
|
2113 */ |
|
2114 if (NULL == fb_decl) ERROR; |
|
2115 |
|
2116 /* now check the semantics of the fb call... */ |
|
2117 /* If the syntax parser is working correctly, exactly one of the |
|
2118 * following two symbols will be NULL, while the other is != NULL. |
|
2119 */ |
|
2120 if (symbol-> formal_param_list != NULL) check_formal_call (symbol, fb_decl); |
|
2121 if (symbol->nonformal_param_list != NULL) check_nonformal_call(symbol, fb_decl); |
|
2122 |
|
2123 return NULL; |
|
2124 } |
|
2125 |
|
2126 |
|
2127 #if 0 |
|
2128 /* helper symbol for fb_invocation */ |
|
2129 /* param_assignment_list ',' param_assignment */ |
|
2130 SYM_LIST(param_assignment_list_c) |
|
2131 |
|
2132 /* variable_name ASSIGN expression */ |
|
2133 SYM_REF2(input_variable_param_assignment_c, variable_name, expression) |
|
2134 |
|
2135 /* [NOT] variable_name '=>' variable */ |
|
2136 SYM_REF3(output_variable_param_assignment_c, not_param, variable_name, variable) |
|
2137 |
|
2138 /* helper CLASS for output_variable_param_assignment */ |
|
2139 SYM_REF0(not_paramassign_c) |
|
2140 #endif |
|
2141 |
|
2142 /********************************/ |
|
2143 /* B 3.2.3 Selection Statements */ |
|
2144 /********************************/ |
|
2145 |
|
2146 /* IF expression THEN statement_list elseif_statement_list ELSE statement_list END_IF */ |
|
2147 // SYM_REF4(if_statement_c, expression, statement_list, elseif_statement_list, else_statement_list) |
|
2148 void *visit_expression_type_c::visit(if_statement_c *symbol) { |
|
2149 symbol_c *expr_type = base_type((symbol_c*)symbol->expression->accept(*this)); |
|
2150 if (!is_BOOL_type(expr_type)) STAGE3_ERROR(symbol->expression,symbol->expression,"IF conditional expression is not of boolean type."); |
|
2151 if (NULL != symbol->statement_list) |
|
2152 symbol->statement_list->accept(*this); |
|
2153 if (NULL != symbol->elseif_statement_list) |
|
2154 symbol->elseif_statement_list->accept(*this); |
|
2155 if (NULL != symbol->else_statement_list) |
|
2156 symbol->else_statement_list->accept(*this); |
|
2157 return NULL; |
|
2158 } |
|
2159 |
|
2160 /* helper symbol for if_statement */ |
|
2161 // SYM_LIST(elseif_statement_list_c) |
|
2162 // void *visit_expression_type_c::visit(elseif_statement_list_c *symbol) { } |
|
2163 |
|
2164 /* helper symbol for elseif_statement_list */ |
|
2165 /* ELSIF expression THEN statement_list */ |
|
2166 // SYM_REF2(elseif_statement_c, expression, statement_list) |
|
2167 void *visit_expression_type_c::visit(elseif_statement_c *symbol) { |
|
2168 symbol_c *elseif_expr_type = base_type((symbol_c*)symbol->expression->accept(*this)); |
|
2169 if(!is_BOOL_type(elseif_expr_type)) STAGE3_ERROR(symbol->expression,symbol->expression,"ELSIF conditional expression is not of boolean type."); |
|
2170 if (NULL != symbol->statement_list) |
|
2171 symbol->statement_list->accept(*this); |
|
2172 return NULL; |
|
2173 } |
|
2174 |
|
2175 |
|
2176 /* CASE expression OF case_element_list ELSE statement_list END_CASE */ |
|
2177 // SYM_REF3(case_statement_c, expression, case_element_list, statement_list) |
|
2178 void *visit_expression_type_c::visit(case_statement_c *symbol) { |
|
2179 case_expression_type = base_type((symbol_c*)symbol->expression->accept(*this)); |
|
2180 if (NULL != case_expression_type) { |
|
2181 if (NULL != symbol->case_element_list) |
|
2182 symbol->case_element_list->accept(*this); |
|
2183 } |
|
2184 if (NULL != symbol->statement_list) |
|
2185 symbol->statement_list->accept(*this); |
|
2186 return NULL; |
|
2187 } |
|
2188 |
|
2189 #if 0 |
|
2190 /* helper symbol for case_statement */ |
|
2191 // SYM_LIST(case_element_list_c) |
|
2192 // void *visit_expression_type_c::visit(case_element_list_c *symbol); |
|
2193 |
|
2194 /* case_list ':' statement_list */ |
|
2195 // SYM_REF2(case_element_c, case_list, statement_list) |
|
2196 void *visit_expression_type_c::visit(case_element_c *symbol); |
|
2197 #endif |
|
2198 |
|
2199 // SYM_LIST(case_list_c) |
|
2200 void *visit_expression_type_c::visit(case_list_c *symbol) { |
|
2201 symbol_c *element_type; |
|
2202 for(int i = 0; i < symbol->n; i++) { |
|
2203 element_type = (symbol_c *)symbol->elements[i]->accept(*this); |
|
2204 if (NULL == element_type) { |
|
2205 STAGE3_ERROR(symbol->elements[i], symbol->elements[i], "Case list element has undefined data type."); |
|
2206 } else { |
|
2207 element_type = base_type(element_type); |
|
2208 if (NULL != element_type){ |
|
2209 /* The CASE value is only used for comparison (and not assingment), so we only check for compatibility! */ |
|
2210 if (!is_compatible_type(case_expression_type, element_type)) |
|
2211 STAGE3_ERROR(symbol->elements[i], symbol->elements[i], "Invalid data type of case list element."); |
|
2212 } |
|
2213 } |
|
2214 } |
|
2215 return NULL; |
|
2216 } |
|
2217 |
|
2218 /********************************/ |
|
2219 /* B 3.2.4 Iteration Statements */ |
|
2220 /********************************/ |
|
2221 |
|
2222 /* FOR control_variable ASSIGN expression TO expression [BY expression] DO statement_list END_FOR */ |
|
2223 // SYM_REF5(for_statement_c, control_variable, beg_expression, end_expression, by_expression, statement_list) |
|
2224 void *visit_expression_type_c::visit(for_statement_c *symbol) { |
|
2225 symbol_c *var_type = (symbol_c*)symbol->control_variable->accept(*this); |
|
2226 if (NULL == var_type) ERROR; |
|
2227 var_type = base_type(var_type); |
|
2228 if (NULL == var_type) ERROR; |
|
2229 // ASSIGN |
|
2230 symbol_c *beg_expr_type = base_type((symbol_c*)symbol->beg_expression->accept(*this)); |
|
2231 if (NULL != beg_expr_type) { |
|
2232 /* The BEG value is assigned to the variable, so we check for assignment validity! */ |
|
2233 if(!is_valid_assignment(var_type, beg_expr_type)) |
|
2234 STAGE3_ERROR(symbol->beg_expression, symbol->beg_expression, "Data type mismatch between control variable and initial value."); |
|
2235 } |
|
2236 // TO |
|
2237 symbol_c *end_expr_type = base_type((symbol_c*)symbol->end_expression->accept(*this)); |
|
2238 if (NULL != end_expr_type) { |
|
2239 /* The TO value is only used for comparison, so we only check for compatibility! */ |
|
2240 if(!is_compatible_type(var_type, end_expr_type)) |
|
2241 STAGE3_ERROR(symbol->end_expression, symbol->end_expression, "Data type mismatch between control variable and final value."); |
|
2242 } |
|
2243 // BY |
|
2244 if(symbol->by_expression != NULL) { |
|
2245 symbol_c *by_expr_type = base_type((symbol_c*)symbol->by_expression->accept(*this)); |
|
2246 if (NULL != end_expr_type) { |
|
2247 /* The BY value is used in an expression (add, sub, ...), so we only check for compatibility! */ |
|
2248 if(!is_compatible_type(var_type, by_expr_type)) |
|
2249 STAGE3_ERROR(symbol->by_expression, symbol->by_expression, "Data type mismatch between control variable and BY value."); |
|
2250 } |
|
2251 } |
|
2252 // DO |
|
2253 if (NULL != symbol->statement_list) |
|
2254 symbol->statement_list->accept(*this); |
|
2255 return NULL; |
|
2256 } |
|
2257 |
|
2258 |
|
2259 /* WHILE expression DO statement_list END_WHILE */ |
|
2260 // SYM_REF2(while_statement_c, expression, statement_list) |
|
2261 void *visit_expression_type_c::visit(while_statement_c *symbol) { |
|
2262 symbol_c *expr_type = base_type((symbol_c*)symbol->expression->accept(*this)); |
|
2263 if (NULL != expr_type) { |
|
2264 if(!is_BOOL_type(expr_type)) |
|
2265 STAGE3_ERROR(symbol->expression,symbol->expression,"WHILE conditional expression is not of boolean type."); |
|
2266 } |
|
2267 |
|
2268 if (NULL != symbol->statement_list) |
|
2269 symbol->statement_list->accept(*this); |
|
2270 return NULL; |
|
2271 } |
|
2272 |
|
2273 /* REPEAT statement_list UNTIL expression END_REPEAT */ |
|
2274 // SYM_REF2(repeat_statement_c, statement_list, expression) |
|
2275 void *visit_expression_type_c::visit(repeat_statement_c *symbol) { |
|
2276 if (NULL != symbol->statement_list) |
|
2277 symbol->statement_list->accept(*this); |
|
2278 |
|
2279 symbol_c *expr_type = base_type((symbol_c*)symbol->expression->accept(*this)); |
|
2280 if (NULL != expr_type) { |
|
2281 if(!is_BOOL_type(expr_type)) |
|
2282 STAGE3_ERROR(symbol->expression,symbol->expression,"REPEAT conditional expression is not of boolean type."); |
|
2283 } |
|
2284 return NULL; |
|
2285 } |
|
2286 |
|
2287 /* EXIT */ |
|
2288 // SYM_REF0(exit_statement_c) |
|
2289 |
|
2290 |
|
2291 |
|