AK: Add decrement operator to Checked

1 files changed, 13 insertions, 0 deletions

diff --git a/AK/Checked.h b/AK/Checked.h
index 3ed63f0132..eaeb1bc3f2 100644
--- a/AK/Checked.h
+++ b/AK/Checked.h
@@ -251,6 +251,19 @@ public:
         return old;
     }
 
+    constexpr Checked& operator--()
+    {
+        sub(1);
+        return *this;
+    }
+
+    constexpr Checked operator--(int)
+    {
+        Checked old { *this };
+        sub(1);
+        return old;
+    }
+
     template<typename U, typename V>
     static constexpr bool addition_would_overflow(U u, V v)
     {