porterskyandQwen 3.8 27B
a65e84e796
Extend the Ex42 observer pattern with Hint objects so each observer receives the reason for the update instead of querying the subject: - Subject::notify() and Observer::update() now take a const Hint& argument. - Add LightHint and WaitHint carrying the traffic light state and WAIT button state, defined in Pelican.h. - Pole dispatches on hint type using dynamic_cast. - The Pole constructor sets its initial lights directly from the Pelican's current state, since no notification is sent at startup. Stopgap until the initial update is handled properly. Co-authored-by: Qwen 3.8 27B <qwen3.8_27b-q3_k_xl@lmstudio.local>
13 lines
297 B
C++
13 lines
297 B
C++
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#include "Subject.h"
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#include "Observer.h"
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void Subject::attach(Observer &obs) { myObservers.insert(&obs); }
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void Subject::notify(const Hint& hint) const {
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for (ObsList::const_iterator iter = myObservers.begin(); iter != myObservers.end(); ++iter) {
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(*iter)->update(hint);
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}
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}
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