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// revisions: min_tait full_tait
#![feature(min_type_alias_impl_trait)]
#![cfg_attr(full_tait, feature(type_alias_impl_trait))]
#![feature(impl_trait_in_bindings)]
#![allow(incomplete_features)]
type FooArg<'a> = &'a dyn ToString;
type FooRet = impl std::fmt::Debug;
type FooItem = Box<dyn Fn(FooArg) -> FooRet>;
type Foo = impl Iterator<Item = FooItem>; //~ ERROR: type mismatch
#[repr(C)]
struct Bar(u8);
impl Iterator for Bar {
type Item = FooItem;
fn next(&mut self) -> Option<Self::Item> {
Some(Box::new(quux))
}
}
fn quux(st: FooArg) -> FooRet {
Some(st.to_string())
}
fn ham() -> Foo {
Bar(1)
}
fn oof() -> impl std::fmt::Debug {
let mut bar = ham();
let func = bar.next().unwrap();
return func(&"oof");
}
fn main() {
let _ = oof();
}
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