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>
porterskyandQwen 3.8 27B
a65e84e796