src/test/ui/consts/const-enum-tuplestruct.rs

// run-pass
#![allow(dead_code)]

enum E { V16(u16), V32(u32) }
struct S(E, u16, u16);
static C: S = S(E::V16(0xDEAD), 0x600D, 0xBAD);

pub fn main() {
    let S(_, n, _) = C;
    assert!(n != 0xBAD);
    assert_eq!(n, 0x600D);
}