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path: root/tests/ui/deriving/deriving-from-wrong-target.rs
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2025-08-19Avoid using `()` in `derive(From)` output.Nicholas Nethercote-2/+0
Using an error type instead of `()` avoids the duplicated errors on `struct SUnsizedField` in `deriving-from-wrong-target.rs`. It also improves the expanded output from this: ``` struct S2(u32, u32); impl ::core::convert::From<()> for S2 { #[inline] fn from(value: ()) -> S2 { (/*ERROR*/) } } ``` to this: ``` struct S2(u32, u32); impl ::core::convert::From<(/*ERROR*/)> for S2 { #[inline] fn from(value: (/*ERROR*/)) -> S2 { (/*ERROR*/) } } ``` The new code also only matchs on `item.kind` once.
2025-08-18Remove the `From` derive macro from preludeJakub Beránek-1/+2
To avoid backwards compatibility problems.
2025-08-15Implement `#[derive(From)]`Jakub Beránek-0/+38