mirror of https://github.com/rust-lang/rust
23 lines
360 B
Rust
23 lines
360 B
Rust
#![feature(type_alias_impl_trait)]
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pub type Successors<'a> = impl Iterator<Item = &'a ()>;
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pub fn f<'a>() -> Successors<'a> {
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None.into_iter()
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}
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pub trait Tr {
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type Item;
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}
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impl<'a> Tr for &'a () {
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type Item = Successors<'a>;
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}
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pub fn kazusa<'a>() -> <&'a () as Tr>::Item {
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None.into_iter()
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//~^ ERROR mismatched types
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}
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fn main() {}
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