From 5107345463be25bc471274bc82c503ba2acdf5b4 Mon Sep 17 00:00:00 2001
From: rebecca <ubq323@ubq323.website>
Date: Sat, 26 Sep 2026 21:46:41 +0100
Subject: class: add is(obj, cls)

---
 class.lua | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

(limited to 'class.lua')

diff --git a/class.lua b/class.lua
index 22cf217..fda1e24 100644
--- a/class.lua
+++ b/class.lua
@@ -23,9 +23,20 @@ local function extend(Base)
 	return T
 end
 
+local function is(obj, cls)
+	if not type(obj) == 'table' then return false end
+	local mt = getmetatable(obj).__index
+	while mt do
+		if rawequal(cls, mt) then return true end
+		mt = (getmetatable(mt) or {}).__index
+	end
+	return false
+end
+
 return setmetatable({
 	class=class,
-	extend=extend
+	extend=extend,
+	is=is,
 },{__call=class})
 
 
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