From 993af2a1916485f854dddc08848d132b3471b67b Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@proton.me>
Date: Wed, 12 Feb 2025 10:35:54 -0500
Subject: [PATCH] add const_assert for BitBoard

---
 Cargo.lock      | 7 +++++++
 Cargo.toml      | 1 +
 src/bitboard.rs | 7 +++++++
 3 files changed, 15 insertions(+)

diff --git a/Cargo.lock b/Cargo.lock
index 85f0bea..9995774 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -170,6 +170,7 @@ dependencies = [
  "num",
  "rand",
  "rayon",
+ "static_assertions",
 ]
 
 [[package]]
@@ -250,6 +251,12 @@ dependencies = [
  "crossbeam-utils",
 ]
 
+[[package]]
+name = "static_assertions"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
+
 [[package]]
 name = "syn"
 version = "2.0.98"
diff --git a/Cargo.toml b/Cargo.toml
index 05560b9..edfb972 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,3 +14,4 @@ lazy_static = "1.5.0"
 num = "0.4"
 rand = "0.9"
 rayon = "1.10"
+static_assertions = "1.1.0"
diff --git a/src/bitboard.rs b/src/bitboard.rs
index 6dd9330..5996ce2 100644
--- a/src/bitboard.rs
+++ b/src/bitboard.rs
@@ -1,4 +1,11 @@
 use crate::board::BOARD_SIZE;
+use static_assertions::const_assert_eq;
+
+// BitBoard should be big enough to fit all points on the board
+const_assert_eq!(
+    std::mem::size_of::<BitBoard>() * 8,
+    (BOARD_SIZE * BOARD_SIZE)
+);
 
 /// 8x8
 /// TODO! look into variable length bit arrays in rust