From 783eec9b4592ff3fa54ffa1a855dda2a71f2db64 Mon Sep 17 00:00:00 2001
From: Bruce Hill <bruce@bruce-hill.com>
Date: Wed, 13 Mar 2019 20:55:24 -0700
Subject: Made iteration easier to work with by using .__inext and .__next for
 custom iteration, and a custom ipairs() and pairs() to use that.

---
 builtin_metatables.lua | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

(limited to 'builtin_metatables.lua')

diff --git a/builtin_metatables.lua b/builtin_metatables.lua
index 63d865c..3b29e39 100644
--- a/builtin_metatables.lua
+++ b/builtin_metatables.lua
@@ -186,8 +186,11 @@ co_mt = {
     return math.huge
   end,
   __call = coroutine.resume,
-  __next = function(self, k)
+  __inext = function(self, k)
     local ok, val = coroutine.resume(self)
+    if coroutine.status(self) == 'dead' then
+      return 
+    end
     if ok then
       return (k or 0) + 1, val
     end
@@ -207,6 +210,7 @@ co_mt = {
     return co_mt[k]
   end
 }
+co_mt.__next = co_mt.__inext
 debug.setmetatable(coroutine.create(function() end), co_mt)
 local nil_mt = {
   __type = "Nil",
-- 
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