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並前往https://pcarleton.com/2021/04/28/rust-what-to-pick-for-the-type-when-writing-your-own-result-type/

Rust: What to pick for the Error type when writing your own ...

I ended up going with option 2b -- an enum with From impl's. Option 1: Re-use an existing Result type. The first option is to not define a new ...

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