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Basically, cmp::Ordering::Less is an enum so a match using it is guaranteed to be exhaustive, whereas you need to be careful when doing an if/else chain that you cover all cases.
Here’s a good example.
Basically,
cmp::Ordering::Lessis an enum so a match using it is guaranteed to be exhaustive, whereas you need to be careful when doing an if/else chain that you cover all cases.