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//@ run-pass
static mut S: *const u8 = unsafe { &S as *const *const u8 as *const u8 };
//~^ WARN shared reference of mutable static is discouraged [static_mut_ref]
struct StaticDoubleLinked {
prev: &'static StaticDoubleLinked,
next: &'static StaticDoubleLinked,
data: i32,
head: bool,
}
static L1: StaticDoubleLinked = StaticDoubleLinked { prev: &L3, next: &L2, data: 1, head: true };
static L2: StaticDoubleLinked = StaticDoubleLinked { prev: &L1, next: &L3, data: 2, head: false };
static L3: StaticDoubleLinked = StaticDoubleLinked { prev: &L2, next: &L1, data: 3, head: false };
pub fn main() {
unsafe {
assert_eq!(S, *(S as *const *const u8));
}
let mut test_vec = Vec::new();
let mut cur = &L1;
loop {
test_vec.push(cur.data);
cur = cur.next;
if cur.head {
break;
}
}
assert_eq!(&test_vec, &[1, 2, 3]);
let mut test_vec = Vec::new();
let mut cur = &L1;
loop {
cur = cur.prev;
test_vec.push(cur.data);
if cur.head {
break;
}
}
assert_eq!(&test_vec, &[3, 2, 1]);
}
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