#[maybe_async_cfg::maybe(
    sync(feature = "is_sync"), 
)]
async fn async_fn() -> bool {
    true
}

#[maybe_async_cfg::maybe(
    idents(async_fn(fn)),
    sync(feature = "is_sync"), 
    async(not(feature = "is_sync")),
)]
async fn test_async_fn() {
    let res = async_fn().await;
    assert_eq!(res, true);
}

fn main() {

}