Make diagnostics clearer for ? operator#75029
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JohnTitor wants to merge 1 commit intorust-lang:masterfrom
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Make diagnostics clearer for ? operator#75029JohnTitor wants to merge 1 commit intorust-lang:masterfrom
? operator#75029JohnTitor wants to merge 1 commit intorust-lang:masterfrom
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JohnTitor
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Aug 1, 2020
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| = note: `?` operator cannot convert from `isize` to `std::result::Result<isize, ()>` | ||
| = help: `?` operator unwraps `Result` or `Option` and propagates its `Err` or `None` |
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In my opinion this last note is not necessary. The clarification with concrete types of the first note should be enough, and people may be using the try_trait feature with custom types where this won't apply.
Though I can see this as The explanation that makes it clear for some people.
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I agree, I feel the second note is probably unnecessary, no-one is likely to try to use ? without knowing that Result and Option are supported.
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☔ The latest upstream changes (presumably #74862) made this pull request unmergeable. Please resolve the merge conflicts. |
estebank
reviewed
Sep 4, 2020
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| LL | let y: u32 = x?.try_into().unwrap(); | ||
| | ^^^^^^^^^^^^^^^^^^^^^^ |
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The suggestion seems to be using the incorrect Span. It should be replacing the ? with the new code.
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Closing this due to inactivity. |
JohnTitor
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Sep 17, 2021
Make diagnostics clearer for `?` operators Re-submission of rust-lang#75029, fixes rust-lang#71309 This also revives the `content` methods removed by rust-lang#83185. r? `@estebank`
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9 participants
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Fixes #71309
r? @estebank