#[no_mangle]
#[inline(never)]
pub fn try_op(a: Result<usize, usize>) -> Result<usize, usize> {
    Ok(a?)
}

#[no_mangle]
#[inline(never)]
pub fn try_macro(a: Result<usize, usize>) -> Result<usize, usize> {
    Ok(try!(a))
}

fn main() {
    println!("{:?}", try_op(Ok(1)));
    println!("{:?}", try_macro(Ok(1)));
}