tests/ui/type-alias-impl-trait/issue-101750.rs

#![feature(type_alias_impl_trait)]

//@ check-pass

pub trait Trait {}

pub type TAIT = impl Trait;

pub struct Concrete;
impl Trait for Concrete {}

#[define_opaque(TAIT)]
pub fn tait() -> TAIT {
    Concrete
}

trait OuterTrait {
    type Item;
}
struct Dummy<T> {
    t: T,
}
impl<T> OuterTrait for Dummy<T> {
    type Item = T;
}

fn tait_and_impl_trait() -> impl OuterTrait<Item = (TAIT, impl Trait)> {
    Dummy { t: (tait(), Concrete) }
}

fn tait_and_dyn_trait() -> impl OuterTrait<Item = (TAIT, Box<dyn Trait>)> {
    let b: Box<dyn Trait> = Box::new(Concrete);
    Dummy { t: (tait(), b) }
}

fn main() {}