Pretty Rust Cards

cards.rs

use std::fmt;
use std::str;

#[derive(Debug)]
pub enum Rank {
    Ace,
    Two,
    Three,
    Four,
    Five,
    Six,
    Seven,
    Eight,
    Nine,
    Ten,
    Jack,
    Queen,
    King,
}

#[derive(Debug)]
pub enum Suit {
    Clubs,    // ♣
    Diamonds, // ♦
    Hearts,   // ♥
    Spades,   // ♠
}

#[derive(Debug)]
pub struct Card {
    pub suit: Suit,
    pub rank: Rank,
}

impl fmt::Display for Card {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let mut card = vec![0xf0, 0x9f];

        match self.suit {
            Suit::Clubs => card.extend([0x83, 0x90].iter().cloned()),
            Suit::Diamonds => card.extend([0x83, 0x80].iter().cloned()),
            Suit::Hearts => card.extend([0x82, 0xb0].iter().cloned()),
            Suit::Spades => card.extend([0x82, 0xa0].iter().cloned()),
        }

        card[3] += match self.rank {
            Rank::Ace => 0x01,
            Rank::Two => 0x02,
            Rank::Three => 0x03,
            Rank::Four => 0x04,
            Rank::Five => 0x05,
            Rank::Six => 0x06,
            Rank::Seven => 0x07,
            Rank::Eight => 0x08,
            Rank::Nine => 0x09,
            Rank::Ten => 0x0a,
            Rank::Jack => 0x0b,
            Rank::Queen => 0x0d,
            Rank::King => 0x0e,
        };

        write!(f, "{}", str::from_utf8(&card).unwrap())
    }
}