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// run-pass
#[derive(PartialEq, Eq, PartialOrd, Ord)]
enum E<T> {
E0,
E1(T),
E2(T,T)
}
pub fn main() {
let e0 = E::E0;
let e11 = E::E1(1);
let e12 = E::E1(2);
let e21 = E::E2(1, 1);
let e22 = E::E2(1, 2);
// in order for both PartialOrd and Ord
let es = [e0, e11, e12, e21, e22];
for (i, e1) in es.iter().enumerate() {
for (j, e2) in es.iter().enumerate() {
let ord = i.cmp(&j);
let eq = i == j;
let lt = i < j;
let le = i <= j;
let gt = i > j;
let ge = i >= j;
// PartialEq
assert_eq!(*e1 == *e2, eq);
assert_eq!(*e1 != *e2, !eq);
// PartialOrd
assert_eq!(*e1 < *e2, lt);
assert_eq!(*e1 > *e2, gt);
assert_eq!(*e1 <= *e2, le);
assert_eq!(*e1 >= *e2, ge);
// Ord
assert_eq!(e1.cmp(e2), ord);
}
}
}
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