| // 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. |
| |
| // Check that coercions unify the expected return type of a polymorphic |
| // function call, instead of leaving the type variables as they were. |
| |
| // pretty-expanded FIXME #23616 |
| |
| struct Foo; |
| impl Foo { |
| fn foo<T>(self, x: T) -> Option<T> { Some(x) } |
| } |
| |
| pub fn main() { |
| let _: Option<fn()> = Some(main); |
| let _: Option<fn()> = Foo.foo(main); |
| |
| // The same two cases, with implicit type variables made explicit. |
| let _: Option<fn()> = Some::<_>(main); |
| let _: Option<fn()> = Foo.foo::<_>(main); |
| } |
