author | Mario de Sousa <msousa@fe.up.pt> |
Mon, 23 Apr 2012 16:44:05 +0100 | |
changeset 528 | 6510ee2eaab9 |
parent 350 | 2c3c4dc34979 |
child 665 | 50fca2d3abd9 |
permissions | -rwxr-xr-x |
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (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, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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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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* An IEC 61131-3 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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/* 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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/* WARNING WARNING WARNING |
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* |
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* When taking into consideration calls to functions, this search_expression_type_c |
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* class will use internal atributes (i.e. anotation) in the function_invocation_c symbol |
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* in the abstract syntax tree. |
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* |
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* Since this anotation/atribute is only set/populated with the correct value |
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* during stage3 (semantic verification), this class will only work correctly |
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* after the semantic verification in stage 3 has been executed |
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* (to be more exact, the data type checking of stage 3). |
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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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virtual ~search_expression_type_c(void); |
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/* A helper function... */ |
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bool is_bool_type(symbol_c *type_symbol); |
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bool is_time_type(symbol_c *type_symbol); |
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bool is_string_type(symbol_c *type_symbol); |
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bool is_literal_integer_type(symbol_c *type_symbol); |
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bool is_integer_type(symbol_c *type_symbol); |
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bool is_literal_real_type(symbol_c *type_symbol); |
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bool is_real_type(symbol_c *type_symbol); |
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bool is_num_type(symbol_c *type_symbol); |
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bool is_nbinary_type(symbol_c *type_symbol); |
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bool is_binary_type(symbol_c *type_symbol); |
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bool is_same_type(symbol_c *first_type, symbol_c *second_type); |
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symbol_c* common_type(symbol_c *first_type, symbol_c *second_type); |
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symbol_c* default_literal_type(symbol_c *symbol); |
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/* |
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#include "search_type_code.c" |
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*/ |
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void *compute_standard_function_default(function_invocation_c *st_symbol, il_formal_funct_call_c *il_symbol); |
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void *compute_standard_function_il(il_function_call_c *symbol, symbol_c *param_data_type); |
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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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/* A helper function... */ |
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void *compute_numeric_expression(symbol_c *left_type, symbol_c *right_type); |
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/* a helper function... */ |
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symbol_c *base_type(symbol_c *symbol); |
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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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/********************************************/ |
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/* B 1.4.1 - Directly Represented Variables */ |
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/********************************************/ |
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void *visit(direct_variable_c *symbol); |
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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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void *visit(structured_variable_c *symbol); |
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/***************************************/ |
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/* B.3 - Language ST (Structured Text) */ |
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/***************************************/ |
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/***********************/ |
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/* B 3.1 - Expressions */ |
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/***********************/ |
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void *visit(or_expression_c *symbol); |
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void *visit(xor_expression_c *symbol); |
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void *visit(and_expression_c *symbol); |
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void *visit(equ_expression_c *symbol); |
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void *visit(notequ_expression_c *symbol); |
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void *visit(lt_expression_c *symbol); |
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void *visit(gt_expression_c *symbol); |
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void *visit(le_expression_c *symbol); |
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void *visit(ge_expression_c *symbol); |
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void *visit(add_expression_c *symbol); |
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void *visit(sub_expression_c *symbol); |
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void *visit(mul_expression_c *symbol); |
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void *visit(div_expression_c *symbol); |
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void *visit(mod_expression_c *symbol); |
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void *visit(power_expression_c *symbol); |
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void *visit(neg_expression_c *symbol); |
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void *visit(not_expression_c *symbol); |
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void *visit(function_invocation_c *symbol); |
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static integer_c integer; |
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}; // search_expression_type_c |
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