38 lines
917 B
Rust
38 lines
917 B
Rust
|
// 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.
|
||
|
|
|
||
|
|
#![feature(overloaded_calls)]
|
||
|
|
|
||
|
|
use std::ops::FnMut;
|
||
|
|
|
||
|
|
fn call_f<F:FnMut<(),()>>(mut f: F) {
|
||
|
|
f();
|
||
|
|
}
|
||
|
|
|
||
|
|
fn f() {
|
||
|
|
println!("hello");
|
||
|
|
}
|
||
|
|
|
||
|
|
fn call_g<G:FnMut<(String,String),String>>(mut g: G, x: String, y: String)
|
||
|
|
-> String {
|
||
|
|
g(x, y)
|
||
|
|
}
|
||
|
|
|
||
|
|
fn g(x: String, y: String) -> String {
|
||
|
|
x.append(y.as_slice())
|
||
|
|
}
|
||
|
|
|
||
|
|
fn main() {
|
||
|
|
call_f(f);
|
||
|
|
assert_eq!(call_g(g, "foo".to_string(), "bar".to_string()).as_slice(),
|
||
|
|
"foobar");
|
||
|
|
}
|
||
|
|
|