| // Copyright 2018 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| use std::fmt::Debug; |
| use std::option; |
| |
| fn parametrized_type_is_allowed() -> Option<impl Debug> { |
| Some(5i32) |
| } |
| |
| fn path_parametrized_type_is_allowed() -> option::Option<impl Debug> { |
| Some(5i32) |
| } |
| |
| fn projection_is_disallowed(x: impl Iterator) -> <impl Iterator>::Item { |
| //~^ ERROR `impl Trait` is not allowed in path parameters |
| //~^^ ERROR ambiguous associated type |
| x.next().unwrap() |
| } |
| |
| fn projection_with_named_trait_is_disallowed(x: impl Iterator) |
| -> <impl Iterator as Iterator>::Item |
| //~^ ERROR `impl Trait` is not allowed in path parameters |
| { |
| x.next().unwrap() |
| } |
| |
| fn projection_with_named_trait_inside_path_is_disallowed() |
| -> <::std::ops::Range<impl Debug> as Iterator>::Item |
| //~^ ERROR `impl Trait` is not allowed in path parameters |
| { |
| (1i32..100).next().unwrap() |
| } |
| |
| fn projection_from_impl_trait_inside_dyn_trait_is_disallowed() |
| -> <dyn Iterator<Item = impl Debug> as Iterator>::Item |
| //~^ ERROR `impl Trait` is not allowed in path parameters |
| { |
| panic!() |
| } |
| |
| fn main() {} |