author | lbessard |
Tue, 29 May 2007 09:45:50 +0200 | |
changeset 31 | c6959b0f539d |
parent 22 | 08bcc40be1fa |
child 32 | 289256ec66f1 |
permissions | -rw-r--r-- |
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/* |
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* (c) 2003 Mario de Sousa |
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* |
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* Offered to the public under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 of the |
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* License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General |
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* Public License for more details. |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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|
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/* |
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* An IEC 61131-3 IL and ST compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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|
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/* Determine the data type of an ST expression. |
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* A reference to the relevant type definition is returned. |
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* |
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* For example: |
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* 2 + 3 -> returns reference to a int_type_name_c object. |
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* 22.2 - 5 -> returns reference to a real_type_name_c object. |
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* etc... |
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*/ |
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class search_expression_type_c: public search_constant_type_c { |
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private: |
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search_varfb_instance_type_c *search_varfb_instance_type; |
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search_base_type_c search_base_type; |
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public: |
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search_expression_type_c(symbol_c *search_scope) { |
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search_varfb_instance_type = new search_varfb_instance_type_c(search_scope); |
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} |
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virtual ~search_expression_type_c(void) { |
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delete search_varfb_instance_type; |
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} |
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/* A helper function... */ |
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bool is_bool_type(symbol_c *type_symbol) { |
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return (typeid(*type_symbol) == typeid(bool_type_name_c)); |
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} |
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/* A helper function... */ |
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bool is_time_compatible(symbol_c *type_symbol) { |
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if (typeid(*type_symbol) == typeid(time_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(date_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(tod_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dt_type_name_c)) {return true;} |
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return false; |
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} |
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/* A helper function... */ |
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bool is_numeric_compatible(symbol_c *type_symbol) { |
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if (typeid(*type_symbol) == typeid(sint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(int_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(usint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(uint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(udint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(ulint_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(real_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lreal_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(bool_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(byte_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(word_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(dword_type_name_c)) {return true;} |
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if (typeid(*type_symbol) == typeid(lword_type_name_c)) {return true;} |
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return false; |
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} |
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private: |
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static bool_type_name_c bool_type_name; |
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/* A helper function... */ |
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void *compute_boolean_expression(symbol_c *left_type, symbol_c *right_type) { |
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if (typeid(*left_type) == typeid(bool_type_name_c) and typeid(*right_type) == typeid(bool_type_name_c)) {return (void *)left_type;} |
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if (is_numeric_compatible(left_type) && is_numeric_compatible(right_type)) {return (void *)left_type;} |
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ERROR; |
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return NULL; |
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} |
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/* A helper function... */ |
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void *compute_numeric_expression(symbol_c *left_type, symbol_c *right_type) { |
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if (is_numeric_compatible(left_type) && is_numeric_compatible(right_type)) {return (void *)left_type;} |
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ERROR; |
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return NULL; |
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} |
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/* a helper function... */ |
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symbol_c *base_type(symbol_c *symbol) { |
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return (symbol_c *)symbol->accept(search_base_type); |
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} |
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/*********************/ |
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/* B 1.4 - Variables */ |
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/*********************/ |
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void *visit(symbolic_variable_c *symbol) { |
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symbol_c *res; |
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|
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/* Nope, now we assume it is a variable, and determine its type... */ |
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res = search_varfb_instance_type->get_type(symbol); |
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if (NULL != res) return res; |
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return NULL; |
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} |
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/*************************************/ |
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/* B 1.4.2 - Multi-element variables */ |
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/*************************************/ |
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void *visit(array_variable_c *symbol) { |
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symbol_c *res; |
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/* Nope, now we assume it is a variable, and determine its type... */ |
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res = search_varfb_instance_type->get_type(symbol); |
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if (NULL != res) return res; |
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return NULL; |
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} |
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133 |
|
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void *visit(structured_variable_c *symbol) { |
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135 |
symbol_c *res; |
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|
136 |
|
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137 |
/* Nope, now we assume it is a variable, and determine its type... */ |
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|
138 |
res = search_varfb_instance_type->get_type(symbol); |
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|
139 |
if (NULL != res) return res; |
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|
140 |
|
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|
141 |
return NULL; |
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|
142 |
} |
16
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|
143 |
|
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144 |
/***************************************/ |
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145 |
/* B.3 - Language ST (Structured Text) */ |
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146 |
/***************************************/ |
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147 |
/***********************/ |
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148 |
/* B 3.1 - Expressions */ |
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149 |
/***********************/ |
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150 |
void *visit(or_expression_c *symbol) { |
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|
151 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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152 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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return compute_boolean_expression(left_type, right_type); |
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154 |
} |
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|
155 |
|
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156 |
void *visit(xor_expression_c *symbol) { |
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|
157 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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|
158 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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|
159 |
return compute_boolean_expression(left_type, right_type); |
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|
160 |
} |
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|
161 |
|
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162 |
void *visit(and_expression_c *symbol) { |
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|
163 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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|
164 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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|
165 |
return compute_boolean_expression(left_type, right_type); |
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|
166 |
} |
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|
167 |
|
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|
168 |
void *visit(equ_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
169 |
void *visit(notequ_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
170 |
void *visit(lt_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
171 |
void *visit(gt_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
172 |
void *visit(le_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
173 |
void *visit(ge_expression_c *symbol) {return (void *)&bool_type_name;} |
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|
174 |
|
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|
175 |
void *visit(add_expression_c *symbol) { |
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|
176 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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|
177 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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|
178 |
if (is_time_compatible(left_type) && is_time_compatible(right_type)) {return left_type;} |
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|
179 |
return compute_numeric_expression(left_type, right_type); |
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|
180 |
} |
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changeset
|
181 |
|
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|
182 |
void *visit(sub_expression_c *symbol) { |
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|
183 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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|
184 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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|
185 |
if (is_time_compatible(left_type) && is_time_compatible(right_type)) {return left_type;} |
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|
186 |
return compute_numeric_expression(left_type, right_type); |
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|
187 |
} |
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changeset
|
188 |
|
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|
189 |
void *visit(mul_expression_c *symbol) { |
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changeset
|
190 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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changeset
|
191 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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changeset
|
192 |
if (is_time_compatible(left_type) && is_time_compatible(right_type)) {return left_type;} |
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changeset
|
193 |
return compute_numeric_expression(left_type, right_type); |
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|
194 |
} |
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changeset
|
195 |
|
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|
196 |
void *visit(div_expression_c *symbol) { |
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changeset
|
197 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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changeset
|
198 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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parents:
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changeset
|
199 |
return compute_numeric_expression(left_type, right_type); |
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Support for struct Time data Types manipulation into ST and IL added
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changeset
|
200 |
} |
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parents:
diff
changeset
|
201 |
|
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
202 |
void *visit(mod_expression_c *symbol) { |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
203 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
204 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
205 |
return compute_numeric_expression(left_type, right_type); |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
206 |
} |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
207 |
|
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
208 |
void *visit(power_expression_c *symbol) { |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
209 |
symbol_c *left_type = base_type((symbol_c *)symbol->l_exp->accept(*this)); |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
210 |
symbol_c *right_type = base_type((symbol_c *)symbol->r_exp->accept(*this)); |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
211 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(sint_type_name_c)) {return (void *)left_type;} |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
212 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(int_type_name_c)) {return (void *)left_type;} |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
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changeset
|
213 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(dint_type_name_c)) {return (void *)left_type;} |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
214 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(lint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
215 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(usint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
216 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(uint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
217 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(udint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
218 |
if (typeid(*left_type) == typeid(real_type_name_c) and typeid(*right_type) == typeid(ulint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
219 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(sint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
220 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(int_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
221 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(dint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
222 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(lint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
223 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(usint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
224 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(uint_type_name_c)) {return (void *)left_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
225 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(udint_type_name_c)) {return (void *)left_type;} |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
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changeset
|
226 |
if (typeid(*left_type) == typeid(lreal_type_name_c) and typeid(*right_type) == typeid(ulint_type_name_c)) {return (void *)left_type;} |
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Support for struct Time data Types manipulation into ST and IL added
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|
227 |
ERROR; |
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Support for struct Time data Types manipulation into ST and IL added
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|
228 |
return NULL; |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
229 |
} |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
230 |
|
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
231 |
void *visit(neg_expression_c *symbol) { |
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Support for struct Time data Types manipulation into ST and IL added
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parents:
diff
changeset
|
232 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
233 |
if (typeid(*exp_type) == typeid(sint_type_name_c)) {return (void *)exp_type;} |
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Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
234 |
if (typeid(*exp_type) == typeid(int_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
235 |
if (typeid(*exp_type) == typeid(dint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
236 |
if (typeid(*exp_type) == typeid(lint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
237 |
if (typeid(*exp_type) == typeid(usint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
238 |
if (typeid(*exp_type) == typeid(uint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
239 |
if (typeid(*exp_type) == typeid(udint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
240 |
if (typeid(*exp_type) == typeid(ulint_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
241 |
if (typeid(*exp_type) == typeid(real_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
242 |
if (typeid(*exp_type) == typeid(lreal_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
243 |
if (typeid(*exp_type) == typeid(time_type_name_c)) {return (void *)exp_type;} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
244 |
ERROR; |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
245 |
return NULL; |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
246 |
} |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
247 |
|
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
248 |
void *visit(not_expression_c *symbol) { |
e8b99f896416
Support for struct Time data Types manipulation into ST and IL added
lbessard
parents:
diff
changeset
|
249 |
symbol_c *exp_type = base_type((symbol_c *)symbol->exp->accept(*this)); |
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250 |
if (typeid(*exp_type) == typeid(bool_type_name_c)) {return (void *)exp_type;} |
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251 |
ERROR; |
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252 |
return NULL; |
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253 |
} |
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254 |
|
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255 |
void *visit(function_invocation_c *symbol) { |
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256 |
function_declaration_c *f_decl = function_symtable.find_value(symbol->function_name); |
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|
257 |
|
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258 |
if (f_decl == function_symtable.end_value()) |
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/* should never occur. The function being called MUST be in the symtable... */ |
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260 |
ERROR; |
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|
261 |
|
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262 |
return base_type(f_decl->type_name); |
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263 |
} |
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264 |
|
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265 |
}; |
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266 |
|
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267 |
bool_type_name_c search_expression_type_c::bool_type_name; |
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268 |