From f4af8004e39ff6f0066fda7dd7eb5457371e1e64 Mon Sep 17 00:00:00 2001 From: Kim Alvefur Date: Wed, 15 Jan 2020 21:18:30 +0100 Subject: util.set: Fix equality metamethod in Lua 5.3 --- util/set.lua | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'util/set.lua') diff --git a/util/set.lua b/util/set.lua index 02fabc6a..827a9158 100644 --- a/util/set.lua +++ b/util/set.lua @@ -8,6 +8,7 @@ local ipairs, pairs, setmetatable, next, tostring = ipairs, pairs, setmetatable, next, tostring; +local getmetatable = getmetatable; local t_concat = table.concat; local _ENV = nil; @@ -146,6 +147,11 @@ function set_mt.__div(set, func) return new_set; end function set_mt.__eq(set1, set2) + if getmetatable(set1) ~= set_mt or getmetatable(set2) ~= set_mt then + -- Lua 5.3+ calls this if both operands are tables, even if metatables differ + return false; + end + set1, set2 = set1._items, set2._items; for item in pairs(set1) do if not set2[item] then -- cgit v1.2.3