use std::mem::size_of;

struct Coll<T> {
    first: T,
    second: Option<T>,
}

enum CollEnum<T> {
    F { first: T },
    S { first: T, second: T },
}

fn main() {
    println!(
        "|Coll<usize>| = {}, |CollEnum<usize>| = {}",
        size_of::<Coll<usize>>(),
        size_of::<CollEnum<usize>>()
    );
    // |Coll<usize>| = 24, |CollEnum<usize>| = 24

    println!(
        "|Coll<Option<usize>>| = {}, |CollEnum<Option<usize>>| = {}",
        size_of::<Coll<Option<usize>>>(),
        size_of::<CollEnum<Option<usize>>>()
    );
    // |Coll<Option<usize>>| = 32, |CollEnum<Option<usize>>| = 40

    println!(
        "|Coll<Option<Option<usize>>>| = {}, |CollEnum<Option<Option<usize>>>| = {}",
        size_of::<Coll<Option<Option<usize>>>>(),
        size_of::<CollEnum<Option<Option<usize>>>>()
    );
    // |Coll<Option<Option<usize>>>| = 32, |CollEnum<Option<Option<usize>>>| = 40
}