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//@ run-pass
// A smoke test for recursive enum structures using Box<T>.
// This test constructs a linked list-like structure to exercise memory allocation and ownership.
// Originally introduced in 2010, this is one of Rust’s earliest test cases.
#![allow(dead_code)]
enum List {
Cons(isize, Box<List>),
Nil,
}
fn main() {
List::Cons(
10,
Box::new(List::Cons(
11,
Box::new(List::Cons(12, Box::new(List::Nil))),
)),
);
}
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