From 476cd2b2518644a2918b10b257739dd1977c6084 Mon Sep 17 00:00:00 2001
From: Peter Zhu <peter@peterzhu.ca>
Date: Wed, 6 Mar 2024 10:37:57 -0500
Subject: [PATCH] [DOC] Add comment about RUBY_FL_SINGLETON

---
 class.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/class.c b/class.c
index 66a3d056b3..89fe59ae78 100644
--- a/class.c
+++ b/class.c
@@ -32,6 +32,8 @@
 
 /* Flags of T_CLASS
  *
+ * 0:    RUBY_FL_SINGLETON
+ *           This class is a singleton class.
  * 2:    RCLASS_SUPERCLASSES_INCLUDE_SELF
  *           The RCLASS_SUPERCLASSES contains the class as the last element.
  *           This means that this class owns the RCLASS_SUPERCLASSES list.