38 lines
964 B
Rust
38 lines
964 B
Rust
// Copyright 2012 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(fn_traits, unboxed_closures)]
|
|
|
|
use std::ops::FnMut;
|
|
|
|
struct S {
|
|
x: isize,
|
|
y: isize,
|
|
}
|
|
|
|
impl FnMut<isize> for S {
|
|
extern "rust-call" fn call_mut(&mut self, z: isize) -> isize {
|
|
self.x + self.y + z
|
|
}
|
|
}
|
|
|
|
impl FnOnce<isize> for S {
|
|
type Output = isize;
|
|
extern "rust-call" fn call_once(mut self, z: isize) -> isize { self.call_mut(z) }
|
|
}
|
|
|
|
fn main() {
|
|
let mut s = S {
|
|
x: 1,
|
|
y: 2,
|
|
};
|
|
drop(s(3)) //~ ERROR cannot use call notation
|
|
}
|