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annotate anagram/agcore/mrule.h @ 21:1c9dac05d040

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Add lint-style FALLTHROUGH annotations to fallthrough cases. (in the parse engine and thus the output code) Document this, because the old output causes warnings with gcc10.
author David A. Holland
date Mon, 13 Jun 2022 00:04:38 -0400
parents 13d2b8934445
children
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1 /*
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2 * AnaGram, A System for Syntax Directed Programming
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3 * Copyright 1993-2002 Parsifal Software. All Rights Reserved.
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4 * See the file COPYING for license and usage terms.
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5 *
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6 * mrule.h - marked rules
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7 */
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8
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9 #ifndef MRULE_H
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10 #define MRULE_H
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11
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12 #include "rule.h"
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13
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14 class MarkedRule {
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15 public:
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16 Rule rule;
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17 int index;
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18
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19 MarkedRule() : rule(0), index(0) {}
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20 MarkedRule(const Rule &r, int x) : rule(r), index(x) {}
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21 MarkedRule(const Rule &r) : rule(r), index(r->length()) {}
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22
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23 int operator < (const MarkedRule &r) const {
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24 if ((int) rule < (int) r.rule) return 1;
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25 if ((int) r.rule < (int) rule) return 0;
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26 return index < r.index;
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27 }
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28
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29 Token leftToken() { return rule.token(index - 1); }
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30 Token rightToken() { return rule.token(index); }
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31 int positionLeft() { return index == 0; }
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32 int positionRight() { return (unsigned) index == rule->length(); }
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33 MarkedRule nextLeft() { return MarkedRule(rule, index - 1); }
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34 MarkedRule nextRight() { return MarkedRule(rule, index + 1); }
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35 };
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36
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37
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38 #endif /* MRULE_H */