a63003fe1a
by-reference upvars. This partially implements RFC 38. A snapshot will be needed to turn this on, because stage0 cannot yet parse the keyword. Part of #12381.
24 lines
686 B
Rust
24 lines
686 B
Rust
// 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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fn each<T>(x: &[T], f: |&T|) {
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for val in x.iter() {
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f(val)
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}
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}
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fn main() {
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let mut sum = 0u;
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let elems = [ 1u, 2, 3, 4, 5 ];
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each(elems, ref |val| sum += *val);
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assert_eq!(sum, 15);
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}
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