1c998416ee
They now always say how many lifetime / type parameters were expected and are explicit about stating "lifetime" or "type" instead of just "parameter".
26 lines
838 B
Rust
26 lines
838 B
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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use std::borrow::Cow;
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pub trait IntoCow<'a, B: ?Sized> where B: ToOwned {
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fn into_cow(self) -> Cow<'a, B>;
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}
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impl<'a> IntoCow<'a, str> for String {
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fn into_cow(self) -> Cow<'a, str> {
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Cow::Owned(self)
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}
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}
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fn main() {
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<String as IntoCow>::into_cow("foo".to_string());
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//~^ ERROR too few type parameters provided: expected 1 type parameter
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}
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