| // 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. |
| |
| use std::borrow::Cow; |
| |
| pub trait IntoCow<'a, B: ?Sized> where B: ToOwned { |
| fn into_cow(self) -> Cow<'a, B>; |
| } |
| |
| impl<'a> IntoCow<'a, str> for String { |
| fn into_cow(self) -> Cow<'a, str> { |
| Cow::Owned(self) |
| } |
| } |
| |
| fn main() { |
| <String as IntoCow>::into_cow("foo".to_string()); |
| //~^ ERROR wrong number of type arguments: expected 1, found 0 |
| } |
