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