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Add a helper to flatten Result<Result<T>> with tokio_util#210
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cgwalters merged 1 commit intoostreedev:mainfrom Jan 19, 2022
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Add a helper to flatten Result<Result<T>> with tokio_util#210cgwalters merged 1 commit intoostreedev:mainfrom
Result<Result<T>> with tokio_util#210cgwalters merged 1 commit intoostreedev:mainfrom
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jlebon
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lib/src/tokio_util.rs
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| Ok(Ok(v)) => Ok(v), | ||
| Ok(Err(e)) => Err(e), |
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Couldn't this be written:
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| Ok(Ok(v)) => Ok(v), | |
| Ok(Err(e)) => Err(e), | |
| Ok(x) => x, |
?
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Ah nice! I started to reply "No because..." then I realized if you just look at it, it's clearly true.
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In my defense this code was inspired by rust-lang/rust#70142 (comment) but they're trying to support a "flatten with" which we're hardcoding to be anyhow! effectively. This code is also not as general because it requires the inner to be an anyhow::Result today.
I think this is nicer than having `??` which still looks odd to me, and we can also drop a `map(anyhow::Error::msg)` in once place too. Prep for further work.
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jlebon
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I think this is nicer than having
??which still looks odd to me,and we can also drop a
map(anyhow::Error::msg)in once place too.Prep for further work.