Deck of cards in Rust

deck.rs

// Copyright © 2018 Bart Massey

// Simple deck of cards using enum_derive.

#[macro_use] extern crate custom_derive;
#[macro_use] extern crate enum_derive;

custom_derive! {

    #[derive(Debug, Clone, Copy, PartialEq, Eq, IterVariants(Suits))]
    enum Suit {
        Hearts,
        Diamonds,
        Clubs,
        Spades,
    }

}

custom_derive! {

    #[derive(Debug, Clone, Copy, PartialEq, Eq, IterVariants(Ranks))]
    enum Rank {
        Two = 2,
        Three,
        Four,
        Five,
        Six,
        Seven,
        Eight,
        Nine,
        Ten,
        Jack,
        Queen,
        King,
        Ace,
    }

}        

#[derive(Debug, Clone, Copy, PartialEq, Eq)]
struct Card {
    rank: Rank,
    suit: Suit,
}

#[derive(Debug)]
struct Deck {
    deck: Vec<Card>,
}

impl Deck {
    fn new() -> Self {
        let mut deck = Vec::new();
        for rank in Rank::iter_variants() {
            for suit in Suit::iter_variants() {
                deck.push(Card{ rank, suit });
            }
        }
        Deck { deck }
    }
}

fn main() {
    let deck = Deck::new();
    for card in deck.deck {
        println!("{:?}", card);
    }
}