36 lines
922 B
Rust
36 lines
922 B
Rust
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// Copyright 2012 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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// Tests that you can use a fn lifetime parameter as part of
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// the value for a type parameter in a bound.
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trait GetRef<'a, T> {
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fn get(&self) -> &'a T;
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}
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struct Box<'a, T> {
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t: &'a T
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}
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impl<'a,T:Clone> GetRef<'a,T> for Box<'a,T> {
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fn get(&self) -> &'a T {
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self.t
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}
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}
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fn add<'a,G:GetRef<'a, int>>(g1: G, g2: G) -> int {
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*g1.get() + *g2.get()
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}
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pub fn main() {
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let b1 = Box { t: &3 };
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assert_eq!(add(b1, b1), 6);
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}
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