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 // any Fn trait to be used where Fn is implemented.
14 #![feature(unboxed_closure_sugar)]
15 #![feature(overloaded_calls)]
17 use std::ops::{Fn,FnMut,FnOnce};
21 impl Fn<(int,),int> for S {
22 extern "rust-call" fn call(&self, (x,): (int,)) -> int {
27 fn call_it<F:Fn(int)->int>(f: &F, x: int) -> int {
31 fn call_it_mut<F:FnMut(int)->int>(f: &mut F, x: int) -> int {
35 fn call_it_once<F:FnOnce(int)->int>(f: F, x: int) -> int {
40 let x = call_it(&S, 22);
41 let y = call_it_mut(&mut S, 22);
42 let z = call_it_once(S, 22);