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//@ run-pass
#![allow(dead_code)]
#![allow(non_upper_case_globals)]
struct CustomAutoRooterVFTable {
trace: unsafe extern "C" fn(this: *mut i32, trc: *mut u32),
}
unsafe trait CustomAutoTraceable: Sized {
const vftable: CustomAutoRooterVFTable = CustomAutoRooterVFTable {
trace: Self::trace,
};
unsafe extern "C" fn trace(this: *mut i32, trc: *mut u32) {
let this = this as *const Self;
let this = this.as_ref().unwrap();
Self::do_trace(this, trc);
}
fn do_trace(&self, trc: *mut u32);
}
unsafe impl CustomAutoTraceable for () {
fn do_trace(&self, _: *mut u32) {
// nop
}
}
fn main() {
let _ = <()>::vftable;
}
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