rust/src/test/run-pass/trait-inheritance-num.rs

// 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.

use std::cmp::{PartialEq, PartialOrd};
use std::num::NumCast;

pub trait NumExt: Num + NumCast + PartialEq + PartialOrd {}

pub trait FloatExt: NumExt {}

fn greater_than_one<T:NumExt>(n: &T) -> bool { *n > NumCast::from(1i).unwrap() }
fn greater_than_one_float<T:FloatExt>(n: &T) -> bool { *n > NumCast::from(1i).unwrap() }

pub fn main() {}