fn c<'a, 'g: 'a, 'f: 'g, A: 'a, B, C, F: Fn(B) -> C + 'f, G: Fn(A) -> B + 'g>(f: F, g: G) -> impl Fn(A) -> C + 'a {
    move |x: A| { f(g(x)) }
}

fn main() {
    println!("{}", c(|x| x + 1, |x| x * 2)(1u8));
}