#![allow(dead_code, deprecated, unused_variables, unused_mut)]
#![feature(once_cell_try)]
use std::cell::OnceCell;
fn main() {
    let cell = OnceCell::new();
    assert_eq!(cell.get_or_try_init(|| Err(())), Err(()));
    assert!(cell.get().is_none());
    let value = cell.get_or_try_init(|| -> Result<i32, ()> { Ok(92) });
    assert_eq!(value, Ok(& 92));
    assert_eq!(cell.get(), Some(& 92))
}