src/test/ui/type-alias-impl-trait/type-alias-nested-impl-trait.rs

   1 // run-pass
   2
   3 // revisions: min_tait full_tait
   4 #![feature(min_type_alias_impl_trait)]
   5 #![cfg_attr(full_tait, feature(type_alias_impl_trait))]
   6 //[full_tait]~^ WARN incomplete
   7
   8 use std::iter::{once, Chain};
   9
  10 type I<A> = Chain<A, impl Iterator<Item = &'static str>>;
  11 fn test2<A: Iterator<Item = &'static str>>(x: A) -> I<A> {
  12     x.chain(once("5"))
  13 }
  14
  15 fn main() {
  16     assert_eq!(vec!["1", "3", "5"], test2(["1", "3"].iter().cloned()).collect::<Vec<_>>());
  17 }