| // Copyright 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. |
| |
| // pretty-expanded FIXME #23616 |
| |
| pub trait OpInt { fn call(&mut self, isize, isize) -> isize; } |
| |
| impl<F> OpInt for F where F: FnMut(isize, isize) -> isize { |
| fn call(&mut self, a:isize, b:isize) -> isize { |
| (*self)(a, b) |
| } |
| } |
| |
| fn squarei<'a>(x: isize, op: &'a mut OpInt) -> isize { op.call(x, x) } |
| |
| fn muli(x:isize, y:isize) -> isize { x * y } |
| |
| pub fn main() { |
| let mut f = |x, y| muli(x, y); |
| { |
| let g = &mut f; |
| let h = g as &mut OpInt; |
| squarei(3, h); |
| } |
| } |
