mjsousa@1000: /*
mjsousa@1000:  *  matiec - a compiler for the programming languages defined in IEC 61131-3
mjsousa@1000:  *
mjsousa@1000:  *  Copyright (C) 2015  Mario de Sousa (msousa@fe.up.pt)
mjsousa@1000:  *
mjsousa@1000:  *
mjsousa@1000:  *  This program is free software: you can redistribute it and/or modify
mjsousa@1000:  *  it under the terms of the GNU General Public License as published by
mjsousa@1000:  *  the Free Software Foundation, either version 3 of the License, or
mjsousa@1000:  *  (at your option) any later version.
mjsousa@1000:  *
mjsousa@1000:  *  This program is distributed in the hope that it will be useful,
mjsousa@1000:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
mjsousa@1000:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
mjsousa@1000:  *  GNU General Public License for more details.
mjsousa@1000:  *
mjsousa@1000:  *  You should have received a copy of the GNU General Public License
mjsousa@1000:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
mjsousa@1000:  *
mjsousa@1000:  *
mjsousa@1000:  * This code is made available on the understanding that it will not be
mjsousa@1000:  * used in safety-critical situations without a full and competent review.
mjsousa@1000:  */
mjsousa@1000: 
mjsousa@1000: /*
mjsousa@1000:  * An IEC 61131-3 compiler.
mjsousa@1000:  *
mjsousa@1000:  * Based on the
mjsousa@1000:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
mjsousa@1000:  *
mjsousa@1000:  */
mjsousa@1000: 
mjsousa@1000: 
mjsousa@1000: /*
mjsousa@1000:  * Case Options Checking:
mjsousa@1000:  *   - Check whether the options in a case statement are repeated, either directly, or in a range.
mjsousa@1000:  *       For example:
mjsousa@1000:  *         case var of
mjsousa@1000:  *           1: ...   <- OK
mjsousa@1000:  *           2: ...   <- OK
mjsousa@1000:  *           1: ...   <- OK (not an error), but produce a warning!
mjsousa@1000:  *           0..8: ...<- OK (not an error), but produce a warning!
mjsousa@1000:  */
mjsousa@1000: 
mjsousa@1000: #include "../absyntax_utils/absyntax_utils.hh"
mjsousa@1000: 
mjsousa@1000: 
mjsousa@1000: 
mjsousa@1000: class case_elements_check_c: public iterator_visitor_c {
mjsousa@1000: 
mjsousa@1000:   private:
mjsousa@1000:     bool warning_found;
mjsousa@1000:     int error_count;
mjsousa@1000:     int current_display_error_level;
mjsousa@1000: 
mjsousa@1000:     std::vector<symbol_c *> case_elements_list;
mjsousa@1000:     void check_subr_subr(symbol_c *s1, symbol_c *s2);
mjsousa@1000:     void check_subr_symb(symbol_c *s1, symbol_c *s2);
mjsousa@1000:     void check_symb_symb(symbol_c *s1, symbol_c *s2);
mjsousa@1000:   
mjsousa@1000: 
mjsousa@1000:   public:
mjsousa@1000:     case_elements_check_c(symbol_c *ignore);
mjsousa@1000:     virtual ~case_elements_check_c(void);
mjsousa@1000:     int get_error_count();
mjsousa@1000: 
mjsousa@1000:     /***************************************/
mjsousa@1000:     /* B.3 - Language ST (Structured Text) */
mjsousa@1000:     /***************************************/
mjsousa@1000:     /********************/
mjsousa@1000:     /* B 3.2 Statements */
mjsousa@1000:     /********************/
mjsousa@1000:     /********************************/
mjsousa@1000:     /* B 3.2.3 Selection Statements */
mjsousa@1000:     /********************************/
mjsousa@1000:     void *visit(case_statement_c *symbol);
mjsousa@1000:     void *visit(case_list_c      *symbol);
mjsousa@1000: }; /* case_elements_check_c */
mjsousa@1000: 
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