From a278dc21348287ca1dca91aa836a436a808b16f6 Mon Sep 17 00:00:00 2001
From: Matthew Wild <mwild1@gmail.com>
Date: Sun, 12 Sep 2021 10:51:27 +0100
Subject: util.set: Add :contains_set() method

---
 util/set.lua | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'util/set.lua')

diff --git a/util/set.lua b/util/set.lua
index 7e600ebd..69dfef5d 100644
--- a/util/set.lua
+++ b/util/set.lua
@@ -52,6 +52,15 @@ local function new(list)
 		return items[item];
 	end
 
+	function set:contains_set(other_set)
+		for item in other_set do
+			if not self:contains(item) then
+				return false;
+			end
+		end
+		return true;
+	end
+
 	function set:items()
 		return next, items;
 	end
-- 
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