| // Copyright 2014 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. |
| |
| // Issue #3902. We are (at least currently) unable to infer `Self` |
| // based on `T`, even though there is only a single impl, because of |
| // the possibility of associated types and other things (basically: no |
| // constraints on `Self` here at all). |
| |
| mod base { |
| pub trait HasNew<T> { |
| fn new() -> T; |
| fn dummy(&self) { } |
| } |
| |
| pub struct Foo { |
| dummy: (), |
| } |
| |
| impl HasNew<Foo> for Foo { |
| fn new() -> Foo { |
| Foo { dummy: () } |
| } |
| } |
| } |
| |
| pub fn foo() { |
| let _f: base::Foo = base::HasNew::new(); |
| //~^ ERROR type annotations required |
| } |
| |
| fn main() { } |
