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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) 2009-2012 Mario de Sousa (msousa@fe.up.pt)
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* Copyright (C) 2012 Manuele Conti (conti.ma@alice.it)
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*
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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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#include <vector>
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#include "../absyntax_utils/absyntax_utils.hh"
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#include "datatype_functions.hh"
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/*
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* In this class we implemented all lvalue check.
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* With lvalue check we mean all semantic error about
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* assignment with wrong access
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*/
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class lvalue_check_c: public iterator_visitor_c {
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private:
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search_varfb_instance_type_c *search_varfb_instance_type;
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search_var_instance_decl_c *search_var_instance_decl;
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search_base_type_c search_base_type;
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int error_found;
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int current_display_error_level;
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std::vector <symbol_c *> control_variables;
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symbol_c *base_type(symbol_c *symbol);
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void check_for_controlvar_assignment(symbolic_variable_c *lvalue);
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void check_output_assignment(symbolic_variable_c *lvalue);
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void check_constant_assignment(symbolic_variable_c *lvalue);
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void check_function_call_parameter(function_invocation_c *f_call);
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public:
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lvalue_check_c(symbol_c *ignore);
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virtual ~lvalue_check_c(void);
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int get_error_found();
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/**************************************/
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/* B 1.5 - Program organisation units */
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/**************************************/
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/***********************/
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/* B 1.5.1 - Functions */
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/***********************/
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void *visit(function_declaration_c *symbol);
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/*****************************/
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/* B 1.5.2 - Function blocks */
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/*****************************/
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void *visit(function_block_declaration_c *symbol);
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/**********************/
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/* B 1.5.3 - Programs */
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/**********************/
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void *visit(program_declaration_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(function_invocation_c *symbol);
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/*********************************/
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/* B 3.2.1 Assignment Statements */
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/*********************************/
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void *visit(assignment_statement_c *symbol);
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/********************************/
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/* B 3.2.4 Iteration Statements */
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/********************************/
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void *visit(for_statement_c *symbol);
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}; /* lvalue_check_c */
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