55 lines
1.1 KiB
Rust
55 lines
1.1 KiB
Rust
// Copyright 2013-2014 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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// Tests that everything still compiles and runs fine even when
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// we reorder the bounds.
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trait A {
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fn a(&self) -> uint;
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}
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trait B {
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fn b(&self) -> uint;
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}
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trait C {
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fn combine<T:A+B>(&self, t: &T) -> uint;
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}
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struct Foo;
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impl A for Foo {
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fn a(&self) -> uint { 1 }
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}
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impl B for Foo {
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fn b(&self) -> uint { 2 }
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}
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struct Bar;
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impl C for Bar {
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// Note below: bounds in impl decl are in reverse order.
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fn combine<T:B+A>(&self, t: &T) -> uint {
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(t.a() * 100) + t.b()
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}
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}
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fn use_c<S:C, T:B+A>(s: &S, t: &T) -> uint {
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s.combine(t)
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}
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pub fn main() {
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let foo = Foo;
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let bar = Bar;
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let r = use_c(&bar, &foo);
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assert_eq!(r, 102);
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}
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