Comments (1)
djmitche
commented on June 18, 2024
Hm, it appears that FnOnce is not possible since this is embedded in the FnMut returned by fold_many*, which may, in fact, be called multiple times in the case of backtracking.
In which case, the Clone bounds was somewhat accurate: this initial value may need to be created multiple times. The supplier function is certainly more flexible! What confused me is that "rewrite init to move || init" isn't quite accurate -- it assumes init is Copy. More accurate is rewrite inittomove || init.clone()`.
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