39 lines
940 B
Rust
39 lines
940 B
Rust
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// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(unboxed_closure_sugar)]
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use std::ops::FnMut;
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struct S;
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impl FnMut<(int,),int> for S {
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extern "rust-call" fn call_mut(&mut self, (x,): (int,)) -> int {
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x * x
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}
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}
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fn call_it<F:|int|->int>(mut f: F, x: int) -> int {
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f.call_mut((x,)) + 3
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}
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fn call_box(f: &mut |&mut: int|->int, x: int) -> int {
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f.call_mut((x,)) + 3
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}
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fn main() {
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let x = call_it(S, 1);
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let y = call_box(&mut S, 1);
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assert!(x == 4);
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assert!(y == 4);
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}
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