29 lines
526 B
Rust
29 lines
526 B
Rust
type pair<A,B> = {
|
|
a: A, b: B
|
|
};
|
|
|
|
enum rec<A> = _rec<A>;
|
|
type _rec<A> = {
|
|
val: A,
|
|
mutable rec: option<@rec<A>>
|
|
};
|
|
|
|
fn make_cycle<A:copy>(a: A) {
|
|
let g: @rec<A> = @rec({val: a, mutable rec: none});
|
|
g.rec = some(g);
|
|
}
|
|
|
|
fn f<A:send,B:send>(a: A, b: B) -> fn@() -> (A, B) {
|
|
fn@() -> (A, B) { (a, b) }
|
|
}
|
|
|
|
fn main() {
|
|
let x = 22_u8;
|
|
let y = 44_u64;
|
|
let z = f(~x, y);
|
|
make_cycle(z);
|
|
let (a, b) = z();
|
|
#debug["a=%u b=%u", *a as uint, b as uint];
|
|
assert *a == x;
|
|
assert b == y;
|
|
} |