From 9ee1a0228d02a0a35c4aa47356cb49867259dc3a Mon Sep 17 00:00:00 2001
From: Aryadev Chavali <aryadev@aryadevchavali.com>
Date: Tue, 7 Apr 2026 12:29:49 +0100
Subject: [PATCH] card:hash: implement hashing for ranks, suits, playing cards

---
 src/card/hash.rs | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/src/card/hash.rs b/src/card/hash.rs
index 84f7840..7457f12 100644
--- a/src/card/hash.rs
+++ b/src/card/hash.rs
@@ -1,6 +1,26 @@
-use crate::card::Card;
+use crate::card::{Card, PlayingCard, Rank, Suit};
 use std::hash::{Hash, Hasher};
 
+impl Hash for Rank {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        (*self as i64).hash(state);
+    }
+}
+
+impl Hash for Suit {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        (*self as i64).hash(state);
+    }
+}
+
+impl Hash for PlayingCard {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        // NOTE: We're using the i64 conversion of card for the hash since that
+        // should generate unique numbers per card.
+        i64::from(*self).hash(state);
+    }
+}
+
 impl Hash for Card {
     fn hash<H: Hasher>(&self, state: &mut H) {
         // NOTE: We're using the i64 conversion of card for the hash since that