32 lines
892 B
Rust
32 lines
892 B
Rust
// 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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trait Foo { fn f() -> int; }
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trait Bar : Foo { fn g() -> int; }
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trait Baz : Bar { fn h() -> int; }
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struct A { x: int }
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impl Foo for A { fn f() -> int { 10 } }
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impl Bar for A { fn g() -> int { 20 } }
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impl Baz for A { fn h() -> int { 30 } }
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// Call a function on Foo, given a T: Baz,
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// which is inherited via Bar
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fn gg<T:Baz>(a: &T) -> int {
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a.f()
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}
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pub fn main() {
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let a = &A { x: 3 };
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assert gg(a) == 10;
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}
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