add const_assert for BitBoard

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"

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"

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