Joe Groff 4011b2f53c Add methods to determine the ownership behavior of patterns. ...

When matching against a noncopyable value, whether the match operation can
borrow the value in-place or needs to take ownership of it is significant.
This can generally be determined from the kind of pattern being used, except
in the case of expr patterns, where it depends on type-checking the `~=`
operator that was used.

2024-01-08 18:21:33 -08:00

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