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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) 2015 Mario de Sousa (msousa@fe.up.pt) |
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5 * |
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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 /* |
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35 * Case Options Checking: |
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36 * - Check whether the options in a case statement are repeated, either directly, or in a range. |
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37 * For example: |
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38 * case var of |
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39 * 1: ... <- OK |
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40 * 2: ... <- OK |
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41 * 1: ... <- OK (not an error), but produce a warning! |
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42 * 0..8: ...<- OK (not an error), but produce a warning! |
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43 */ |
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44 |
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45 #include "../absyntax_utils/absyntax_utils.hh" |
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46 |
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47 |
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48 |
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49 class case_elements_check_c: public iterator_visitor_c { |
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50 |
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51 private: |
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52 bool warning_found; |
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53 int error_count; |
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54 int current_display_error_level; |
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55 |
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56 std::vector<symbol_c *> case_elements_list; |
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57 void check_subr_subr(symbol_c *s1, symbol_c *s2); |
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58 void check_subr_symb(symbol_c *s1, symbol_c *s2); |
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59 void check_symb_symb(symbol_c *s1, symbol_c *s2); |
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60 |
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61 |
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62 public: |
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63 case_elements_check_c(symbol_c *ignore); |
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64 virtual ~case_elements_check_c(void); |
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65 int get_error_count(); |
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66 |
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67 /***************************************/ |
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68 /* B.3 - Language ST (Structured Text) */ |
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69 /***************************************/ |
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70 /********************/ |
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71 /* B 3.2 Statements */ |
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72 /********************/ |
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73 /********************************/ |
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74 /* B 3.2.3 Selection Statements */ |
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75 /********************************/ |
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76 void *visit(case_statement_c *symbol); |
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77 void *visit(case_list_c *symbol); |
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78 }; /* case_elements_check_c */ |
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79 |
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80 |
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81 |
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82 |
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83 |
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84 |
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85 |