feat(ecs): check if value is too large in BitMask::field_prep

1 files changed, 9 insertions, 0 deletions

diff --git a/ecs/src/util.rs b/ecs/src/util.rs
index 17436ff..6f7aed7 100644
--- a/ecs/src/util.rs
+++ b/ecs/src/util.rs
@@ -252,6 +252,8 @@ impl BitMask<u64>
     #[must_use]
     pub const fn field_prep(self, field_value: u64) -> u64
     {
+        debug_assert!(field_value < 1 << self.mask.count_ones());
+
         ((field_value) << self.mask.trailing_zeros()) & (self.mask)
     }
 }
@@ -319,4 +321,11 @@ mod tests
     {
         assert_eq!(BitMask::new(0b11000).field_prep(3), 0b11000);
     }
+
+    #[test]
+    #[should_panic]
+    fn bitmask_field_prep_too_large_value_panics()
+    {
+        let _ = BitMask::new(0b001110).field_prep(9);
+    }
 }