31 lines
740 B
Rust
31 lines
740 B
Rust
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// 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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pub struct Foo;
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pub trait Bar {
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fn bar(&self);
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}
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pub trait Baz {}
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impl<T: Baz> Bar for T {
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fn bar(&self) {}
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}
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impl Baz for Foo {}
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pub fn foo(t: Box<Foo>) {
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t.bar(); // ~Foo doesn't implement Baz
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(*t).bar(); // ok b/c Foo implements Baz
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}
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fn main() {}
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