1 // Copyright 2014 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.
11 // Checks that the Fn trait hierarchy rules permit
12 // FnMut or FnOnce to be used where FnMut is implemented.
14 // pretty-expanded FIXME #23616
16 #![feature(unboxed_closures, core)]
18 use std::ops::{FnMut,FnOnce};
22 impl FnMut<(i32,)> for S {
25 extern "rust-call" fn call_mut(&mut self, (x,): (i32,)) -> i32 {
30 fn call_it_mut<F:FnMut(i32)->i32>(f: &mut F, x: i32) -> i32 {
34 fn call_it_once<F:FnOnce(i32)->i32>(f: F, x: i32) -> i32 {
39 let y = call_it_mut(&mut S, 22);
40 let z = call_it_once(S, 22);