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26 lines
774 B
Rust
26 lines
774 B
Rust
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// Copyright 2012 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_closures)]
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use std::ops::FnMut;
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fn make_adder(x: int) -> Box<FnMut<(int,),int>> {
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(box |&mut: y: int| -> int { x + y }) as Box<FnMut<(int,),int>>
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}
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pub fn main() {
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let mut adder = make_adder(3);
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let z = adder.call_mut((2,));
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println!("{}", z);
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assert_eq!(z, 5);
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}
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