Assume msg.url if no cb is provided

britzl · Sep 24, 2017 · f8b92b2 · f8b92b2
1 parent b0808e6
commit f8b92b2
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/ludobits/m/signal.lua b/ludobits/m/signal.lua
@@ -9,7 +9,7 @@ function M.create(signal_id)
 	local listeners = {}
 
 	function signal.add(cb)
-		assert(cb, "You must provide a callback")
+		cb = cb or msg.url()
 		if type(cb) == "function" then
 			listeners[cb] = { fn = cb }
 		else
@@ -19,7 +19,7 @@ function M.create(signal_id)
 	end
 
 	function signal.remove(cb)
-		assert(cb, "You must provide a callback")
+		cb = cb or msg.url()
 		if type(cb) == "function" then
 			listeners[cb] = nil
 		else