#![feature(fn_traits, unboxed_closures)]
#[allow(non_camel_case_types)]

struct get_max;
fn get_max_fn_body<T: PartialOrd>(a: T, b: T) -> T {
    if a > b { a } else { b }
}

impl FnOnce<(i32, i32)> for get_max {
    type Output = i32;
    #[inline(always)]
    extern "rust-call" fn call_once(self, args: (i32, i32)) -> Self::Output {
        get_max_fn_body.call_once(args)
    }
}

impl FnMut<(i32, i32)> for get_max {
    #[inline(always)]
    extern "rust-call" fn call_mut(&mut self, args: (i32, i32)) -> Self::Output {
        get_max_fn_body.call_once(args)
    }
}


fn main() {
    let x = get_max.call_mut(1,2);
    println!("x: {}", x);
}