21 lines
752 B
Rust
21 lines
752 B
Rust
// Copyright 2017 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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trait Stream { type Item; }
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impl<'a> Stream for &'a str { type Item = u8; }
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fn f<'s>(s: &'s str) -> (&'s str, <&'s str as Stream>::Item) {
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(s, 42)
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}
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fn main() {
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let fx = f as for<'t> fn(&'t str) -> (&'t str, <&'t str as Stream>::Item);
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assert_eq!(fx("hi"), ("hi", 42));
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}
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