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//@ run-pass
use std::ops::Deref;
struct ArenaSet<U: Deref, V=<U as Deref>::Target>(U, &'static V)
where V: 'static + ?Sized;
static Z: [u8; 4] = [1,2,3,4];
fn arena() -> &'static ArenaSet<Vec<u8>> {
fn __static_ref_initialize() -> ArenaSet<Vec<u8>> {
ArenaSet(vec![], &Z)
}
unsafe {
use std::sync::Once;
fn require_sync<T: Sync>(_: &T) { }
unsafe fn __stability() -> &'static ArenaSet<Vec<u8>> {
use std::mem::transmute;
static mut DATA: *const ArenaSet<Vec<u8>> = std::ptr::null_mut();
static mut ONCE: Once = Once::new();
ONCE.call_once(|| {
DATA = transmute
::<Box<ArenaSet<Vec<u8>>>, *const ArenaSet<Vec<u8>>>
(Box::new(__static_ref_initialize()));
});
&*DATA
}
let static_ref = __stability();
require_sync(static_ref);
static_ref
}
}
fn main() {
let &ArenaSet(ref u, v) = arena();
assert!(u.is_empty());
assert_eq!(v, Z);
}
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