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https://github.com/rust-lang/rust
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28 lines
756 B
Rust
28 lines
756 B
Rust
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// Copyright 2015 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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enum Sexpression {
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Num(()),
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Cons(&'static mut Sexpression)
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}
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fn causes_ice(mut l: &mut Sexpression)
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{
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loop { match l {
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&mut Sexpression::Num(ref mut n) => {},
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&mut Sexpression::Cons(ref mut expr) => {
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l = &mut **expr;
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}
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}}
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}
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fn main() {
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}
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