36 lines
837 B
Rust
36 lines
837 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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pub trait MyNum {
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fn from_int(_: isize) -> Self;
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}
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pub trait NumExt: MyNum { }
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struct S { v: isize }
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impl MyNum for S {
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fn from_int(i: isize) -> S {
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S {
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v: i
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}
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}
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}
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impl NumExt for S { }
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fn greater_than_one<T:NumExt>() -> T { MyNum::from_int(1) }
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pub fn main() {
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let v: S = greater_than_one();
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assert_eq!(v.v, 1);
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}
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