Help with Required Expression

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@paj418

It would be interesting to know if the Rule Machine can perform short circuit evaluations of IF expressions. I write my rules hoping it can, but have the feeling it probably doesn't

No, it does, which is why I put most likely bail out expression first. You can find Bruce’s reply to me in one of the RM 5.x threads when complex expressions were introduced and I asked.

EDIT: here it is:

Rule 5.1 Predicate and Repeat While/Until Rule

They don't happen, no queuing. If Predicate is false, subscriptions to trigger events are removed, so the rule is not triggered at all. When the Predicate becomes true, the event subscriptions are recreated, and the rule will be triggered again. Even with subscriptions active, the last state of the Predicate is checked before any actions are run, and if false, the rule exits. Net: Predicate false means the rule is not triggered. Correct, it is a strictly left to right evaluation, and onc…