rust/tests/ui/iterators/vec-on-unimplemented.rs

//@ run-rustfix
fn main() {
    let _ = vec![true, false].map(|v| !v).collect::<Vec<_>>();
    //~^ ERROR no method named `map` found for struct `Vec<bool>` in the current scope
}
Be more lax in `.into_iter()` suggestion when encountering `Iterator` methods on non-`Iterator` ``` error[E0599]: no method named `map` found for struct `Vec<bool>` in the current scope --> $DIR/vec-on-unimplemented.rs:3:23 \| LL \| vec![true, false].map(\|v\| !v).collect::<Vec<_>>(); \| ^^^ `Vec<bool>` is not an iterator \| help: call `.into_iter()` first \| LL \| vec![true, false].into_iter().map(\|v\| !v).collect::<Vec<_>>(); \| ++++++++++++ ``` We used to provide some help through `rustc_on_unimplemented` on non-`impl Trait` and non-type-params, but this lets us get rid of some otherwise unnecessary conditions in the annotation on `Iterator`. 2024-03-01 21:37:56 +00:00			`//@ run-rustfix`
Suggest using `iter()` or `into_iter()` for `Vec` We cannot do that for `&Vec` because `#[rustc_on_unimplemented]` is limited (it does not clean generic instantiation for references, only for ADTs). 2022-06-08 11:09:08 +00:00			`fn main() {`
Be more lax in `.into_iter()` suggestion when encountering `Iterator` methods on non-`Iterator` ``` error[E0599]: no method named `map` found for struct `Vec<bool>` in the current scope --> $DIR/vec-on-unimplemented.rs:3:23 \| LL \| vec![true, false].map(\|v\| !v).collect::<Vec<_>>(); \| ^^^ `Vec<bool>` is not an iterator \| help: call `.into_iter()` first \| LL \| vec![true, false].into_iter().map(\|v\| !v).collect::<Vec<_>>(); \| ++++++++++++ ``` We used to provide some help through `rustc_on_unimplemented` on non-`impl Trait` and non-type-params, but this lets us get rid of some otherwise unnecessary conditions in the annotation on `Iterator`. 2024-03-01 21:37:56 +00:00			`let _ = vec![true, false].map(\|v\| !v).collect::<Vec<_>>();`
			//~^ ERROR no method named `map` found for struct `Vec<bool>` in the current scope
Suggest using `iter()` or `into_iter()` for `Vec` We cannot do that for `&Vec` because `#[rustc_on_unimplemented]` is limited (it does not clean generic instantiation for references, only for ADTs). 2022-06-08 11:09:08 +00:00			`}`