as_ref() type must be known at this point
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pronebird commented
Hi,
I have noticed that calling as_ref()
on error returned from anyhow::Result<T>
always errors with type must be known at this point
. It seems that simply casting to dyn Error
works fine however requires that weird hoop before I can call my own traits implemented for anything that looks like std::error::Error
:
let dyn_error = err.as_ref() as &dyn std::error::Error;
I looked at the source code and I am genuinely confused, what's going on there and how can one access &dyn std::error::Error
from anyhow::Error
without going through explicit cast?
Thanks.