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Figure out how context should interact with downcasting #32

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dtolnay opened this issue Oct 22, 2019 · 1 comment · Fixed by #34

Owner

dtolnay commented Oct 22, 2019

For example if we have:

let e = fs::read("/...").context(ReadFailed).unwrap_err();
match e.downcast_ref::<ReadFailed>() {

should this downcast succeed or fail?

Owner Author

dtolnay commented Oct 22, 2019

For that matter, should e.downcast_ref::<io::Error>() succeed?

dtolnay mentioned this issue

Support downcasting errors with context to C *or* E #34

Merged

dtolnay closed this as completed in #34

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