36 lines
810 B
Rust
36 lines
810 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.
|
|
|
|
// Test that you can supply `&F` where `F: Fn()`.
|
|
|
|
#![feature(lang_items)]
|
|
|
|
fn a<F:Fn() -> i32>(f: F) -> i32 {
|
|
f()
|
|
}
|
|
|
|
fn b(f: &Fn() -> i32) -> i32 {
|
|
a(f)
|
|
}
|
|
|
|
fn c<F:Fn() -> i32>(f: &F) -> i32 {
|
|
a(f)
|
|
}
|
|
|
|
fn main() {
|
|
let z: isize = 7;
|
|
|
|
let x = b(&|| 22);
|
|
assert_eq!(x, 22);
|
|
|
|
let x = c(&|| 22);
|
|
assert_eq!(x, 22);
|
|
}
|