attributes: update #[instrument]
to support async-trait
0.1.43+
#1291
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This backports #1228 from
master
tov0.1.x
.It works with both the old and new version of async-trait (except for
one doc test that failed previously, and that works with the new
version). One nice thing is that the code is simpler (e.g.g no self
renaming to _self, which will enable some simplifications in the
future).
A minor nitpick is that I disliked the deeply nested pattern matching in
get_async_trait_kind (previously: get_async_trait_function), so I
"flattened" that a bit.
Fixes #1219.