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annotate anagram/support/agnotify.h @ 12:aab9ff6af791

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Strengthen the build hack for non-DOS targets.
author David A. Holland
date Tue, 31 May 2022 00:58:42 -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 1997-2002 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 * agnotify.h
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7 */
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8
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9 #ifndef AGNOTIFY_H
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10 #define AGNOTIFY_H
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11
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12 #include "agstack.h"
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13
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14
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15 class AgNotifierBase;
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16
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17 class AgNotificationActionBase {
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18 protected:
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19 AgStack<AgNotifierBase *> notifierStack;
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20 public:
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21 AgNotificationActionBase() {}
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22 virtual ~AgNotificationActionBase();
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23 virtual void perform() {}
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24 AgNotificationActionBase &attach(AgNotifierBase *notifier);
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25 void remove(AgNotifierBase *notifier);
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26 };
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27
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28 template <class T>
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29 class AgNotificationAction : public AgNotificationActionBase {
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30 protected:
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31 T *object;
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32 void (T::*memberFunction)();
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33 public:
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34 AgNotificationAction(T *x, void (T::*f)()): object(x), memberFunction(f) {}
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35 void perform() { (object->*memberFunction)(); }
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36 };
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37
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38 class AgNotifierBase {
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39 protected:
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40 AgStack<AgNotificationActionBase *> notifyStack;
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41 void notify();
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42
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43 public:
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44 AgNotifierBase() {}
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45 virtual ~AgNotifierBase();
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46 void attach(AgNotificationActionBase *action) {
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47 notifyStack.push(action);
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48 }
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49 void remove(AgNotificationActionBase *action);
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50 };
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51
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52 template <class T>
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53 class AgNotifier : public AgNotifierBase {
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54 protected:
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55 T contents;
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56
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57 public:
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58 AgNotifier(const T &d) : contents(d) {}
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59 AgNotifier(const AgNotifier<T> &d) : contents(d.contents) {}
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60 operator T &() { return contents; }
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61 //T &data() { return contents; }
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62 T *pointer() { return &contents; }
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63 virtual void initialize(const T &d) {
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64 contents = d;
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65 }
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66 virtual T &operator = (const T &d) {
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67 contents = d;
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68 notify();
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69 return contents;
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70 }
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71 };
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72
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73
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74 #endif /* AGNOTIFY_H */