b2f6406b6f
After selecting all (enabled) transitions for a microstep, filter out any conflicting transition. The actual conflict resulution is done by ordering the transitions in order of the states that selected them. For example: if an event would trigger two transitions in a parallel state where one would exit that state and the other would not, this filtering prevents the state machine from selecting both states (as this case is an invalid state of the whole machine). This also fixes the exit set calculation for parallel states when one of its substates is exited and subsequently re-entered in the same transition. Previously, the parallel state was not exited, and subsequent re-entry was ignored (because it was still active). Now it is correctly exited and re-entered. A side-effect of the transition ordering mentioned above is it also fixes the non-deterministic behavior of which of the conflicting transitions is taken. [ChangeLog][QtCore] Fixed an issue where the state machine could end up in an invalid state when transitions from a parallel state were not checked for conflicts. [ChangeLog][QtCore] Fixed a case where a parallel state was not exited and re-entered when one of its substates was exited and subsequently re-entered. [ChangeLog][QtCore] Fixed the non-deterministic behavior of picking a transition from a set of conflicting transitions. Task-number: QTBUG-44783 Change-Id: I2ee72b6a2f552077bfa7aa4d369474ab62f4c2f0 Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@theqtcompany.com> Reviewed-by: Kevin Funk <kevin.funk@kdab.com> |
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| corelib.pro | ||