1 // Copyright 2012 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 use std::cmp::PartialEq;
14 use std::num::NumCast;
16 pub trait NumExt: PartialEq + NumCast {}
18 impl NumExt for f32 {}
19 impl NumExt for int {}
21 fn num_eq_one<T:NumExt>() -> T {
22 NumCast::from(1).unwrap()
26 num_eq_one::<int>(); // you need to actually use the function to trigger the ICE