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1a4d82fc | 1 | // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
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2 | // file at the top-level directory of this distribution and at |
3 | // http://rust-lang.org/COPYRIGHT. | |
4 | // | |
5 | // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or | |
6 | // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license | |
7 | // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your | |
8 | // option. This file may not be copied, modified, or distributed | |
9 | // except according to those terms. | |
10 | ||
54a0048b SL |
11 | use std::borrow::Cow; |
12 | ||
13 | pub trait IntoCow<'a, B: ?Sized> where B: ToOwned { | |
14 | fn into_cow(self) -> Cow<'a, B>; | |
15 | } | |
16 | ||
17 | impl<'a> IntoCow<'a, str> for String { | |
18 | fn into_cow(self) -> Cow<'a, str> { | |
19 | Cow::Owned(self) | |
20 | } | |
21 | } | |
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22 | |
23 | fn main() { | |
85aaf69f | 24 | <String as IntoCow>::into_cow("foo".to_string()); |
62682a34 | 25 | //~^ ERROR too few type parameters provided: expected 1 parameter |
223e47cc | 26 | } |