//@ check-pass | |
//@ run-rustfix | |
//@ edition 2018 | |
#![warn(rust_2021_prelude_collisions)] | |
trait MyTrait<A> { | |
fn from_iter(x: Option<A>); | |
} | |
impl<T> MyTrait<()> for Vec<T> { | |
fn from_iter(_: Option<()>) {} | |
} | |
fn main() { | |
<Vec<i32> as MyTrait<_>>::from_iter(None); | |
//~^ WARNING trait-associated function `from_iter` will become ambiguous in Rust 2021 | |
//~^^ WARNING this is accepted in the current edition | |
} |