X-Git-Url: https://git.enpas.org/?a=blobdiff_plain;f=util%2Fset.lua;h=84bfe8c42c299e29bcb506ab153198b5677f91b0;hb=a80f2d734aaf6cf54728a7d9e4a68335f91af8f9;hp=bb318adf5290a207d41c3c7f0a2144acf4dd2dcd;hpb=35d012211b0504a3076bf55e3d02988329d63203;p=prosody.git

diff --git a/util/set.lua b/util/set.lua
index bb318adf..84bfe8c4 100644
--- a/util/set.lua
+++ b/util/set.lua
@@ -141,4 +141,8 @@ function intersection(set1, set2)
 	return set;
 end
 
+function xor(set1, set2)
+	return union(set1, set2) - intersection(set1, set2);
+end
+
 return _M;