From 0e1f40ad308a2020801dbc9aa91ac6f6d24e6226 Mon Sep 17 00:00:00 2001
From: Ishaan Bhardwaj <sashlilac109@gmail.com>
Date: Fri, 27 Aug 2021 17:18:06 -0400
Subject: [PATCH] Amend the copying functions

---
 funcs.lua | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/funcs.lua b/funcs.lua
index 5de574b..70697f3 100644
--- a/funcs.lua
+++ b/funcs.lua
@@ -1,10 +1,20 @@
 function copy(t)
-	-- returns deep copy of t (as opposed to the shallow copy you get from var = t)
+	-- returns top-layer shallow copy of t
 	if type(t) ~= "table" then return t end
-	local meta = getmetatable(t)
 	local target = {}
-	for k, v in pairs(t) do target[k] = v end
-	setmetatable(target, meta)
+	for k, v in next, t do target[k] = v end
+	setmetatable(target, getmetatable(t))
+	return target
+end
+
+function deepcopy(t)
+    -- returns infinite-layer deep copy of t
+	if type(t) ~= "table" then return t end
+	local target = {}
+	for k, v in next, t do
+		target[deepcopy(k)] = deepcopy(v)
+	end
+	setmetatable(target, deepcopy(getmetatable(t)))
 	return target
 end