39 lines
998 B
Rust
39 lines
998 B
Rust
// 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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type pair<A,B> = {
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a: A, b: B
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};
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enum rec<A> = _rec<A>;
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type _rec<A> = {
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val: A,
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mut rec: Option<@rec<A>>
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};
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fn make_cycle<A:Copy>(a: A) {
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let g: @rec<A> = @rec({val: a, mut rec: None});
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g.rec = Some(g);
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}
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fn f<A:Owned Copy, B:Owned Copy>(a: A, b: B) -> fn@() -> (A, B) {
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fn@() -> (A, B) { (a, b) }
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}
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fn main() {
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let x = 22_u8;
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let y = 44_u64;
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let z = f(~x, y);
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make_cycle(z);
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let (a, b) = z();
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debug!("a=%u b=%u", *a as uint, b as uint);
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assert *a == x;
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assert b == y;
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} |