From 7f34b9f5efe805d604b4ef15e1afbe52c4701391 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bitbucket@bruce-hill.com>
Date: Thu, 30 Aug 2018 14:21:18 -0700
Subject: Added safety check to detect non-number keys in lists.

---
 containers.moon | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'containers.moon')

diff --git a/containers.moon b/containers.moon
index deb5684..2441ccf 100644
--- a/containers.moon
+++ b/containers.moon
@@ -50,6 +50,10 @@ _list_mt =
                 if x == item
                     return i
             return nil
+    -- TODO: remove this safety check to get better performance?
+    __newindex: (k,v)=>
+        assert type(k) == 'number', "List indices must be numbers"
+        rawset(@, k, v)
 
 list = (t)-> setmetatable(t, _list_mt)
 
-- 
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