Only suggest removing semicolon when expression is compatible with impl Trait
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oh, hey, it r?'ed the person i was gonna cc in this followup comment... that being said, @estebank, I don't know the context that you have in this FIXME: // FIXME(estebank): When encountering a method with a trait
// bound not satisfied in the return type with a body that has
// no return, suggest removal of semicolon on last statement.
// Once that is added, close #54771.What more work needs to be done to improve this? I'd love to investigate more. |
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| LL | fn bar() -> impl Bar { | ||
| | ^^^^^^^^ the trait `Bar` is not implemented for `()` |
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Should we add a span label pointing at the last statement saying "this is a statement, which are always of type ()" and maybe mention the type of the expression in that statement if it were a tail expression, explaining that it doesn't match the trait?
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r=me after removing unnecessary comment. Feel free to address some of the nitpicks at your leisure. |
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Also changed the equiavlent "consider removing semicolon" to just say "remove" (e.g. @bors r=estebank |
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📌 Commit dfe13db has been approved by |
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…bank Only suggest removing semicolon when expression is compatible with `impl Trait` rust-lang#54771 (comment) > It still needs checking that the last statement's expr can actually conform to the trait, but the naïve behavior is there. Only suggest removing a semicolon when the type behind the semicolon actually implements the trait in an RPIT `-> impl Trait`. Also upgrade the label that suggests removing the semicolon to a suggestion (should it be verbose?). cc rust-lang#54771
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…bank Only suggest removing semicolon when expression is compatible with `impl Trait` rust-lang#54771 (comment) > It still needs checking that the last statement's expr can actually conform to the trait, but the naïve behavior is there. Only suggest removing a semicolon when the type behind the semicolon actually implements the trait in an RPIT `-> impl Trait`. Also upgrade the label that suggests removing the semicolon to a suggestion (should it be verbose?). cc rust-lang#54771
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…bank Only suggest removing semicolon when expression is compatible with `impl Trait` rust-lang#54771 (comment) > It still needs checking that the last statement's expr can actually conform to the trait, but the naïve behavior is there. Only suggest removing a semicolon when the type behind the semicolon actually implements the trait in an RPIT `-> impl Trait`. Also upgrade the label that suggests removing the semicolon to a suggestion (should it be verbose?). cc rust-lang#54771
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…bank Only suggest removing semicolon when expression is compatible with `impl Trait` rust-lang#54771 (comment) > It still needs checking that the last statement's expr can actually conform to the trait, but the naïve behavior is there. Only suggest removing a semicolon when the type behind the semicolon actually implements the trait in an RPIT `-> impl Trait`. Also upgrade the label that suggests removing the semicolon to a suggestion (should it be verbose?). cc rust-lang#54771
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⌛ Testing commit dfe13db with merge 6a4851f22a7d3cd2b908b9e3a3cd8daff692da07... |
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@bors retry yield to rollup containing this pr |
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☀️ Test successful - checks-actions |
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#54771 (comment)
Only suggest removing a semicolon when the type behind the semicolon actually implements the trait in an RPIT
-> impl Trait. Also upgrade the label that suggests removing the semicolon to a suggestion (should it be verbose?).cc #54771