Fix panics in try_cast_slice_box etc
#254
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Casting from non-empty non-ZST slices to ZST slices now returns Err(SizeMismatch) (instead of panicking). Casting from empty non-ZST slices to ZST slices is allowed and returns an empty slice (instead of panicking). Casting from ZST slices to non-ZST slices is allowed and returns an empty slice (status quo).
Lokathor
approved these changes
Jul 21, 2024
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Addresses the panics described in #253, but does not change the other inconsistencies (i.e. option 1 overall "status quo" + option 1 for the panic "Allow empty source slices for
[NonZst] -> [Zst], return an error on non-empty source slices").