| // Copyright 2012-2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Extending Num and using inherited static methods |
| |
| // pretty-expanded FIXME #23616 |
| |
| #![feature(core)] |
| |
| use std::cmp::PartialOrd; |
| |
| pub trait NumCast: Sized { |
| fn from(i: i32) -> Option<Self>; |
| } |
| |
| pub trait Num { |
| fn from_int(i: isize) -> Self; |
| fn gt(&self, other: &Self) -> bool; |
| } |
| |
| pub trait NumExt: NumCast + PartialOrd { } |
| |
| fn greater_than_one<T:NumExt>(n: &T) -> bool { |
| n.gt(&NumCast::from(1).unwrap()) |
| } |
| |
| pub fn main() {} |
