Replace mutable handles in-place

src/syndicate/actors.nim

@@ -291,6 +291,12 @@ proc replace*[T](turn: var Turn; `ref`: Ref; h: Handle; v: T): Handle =
   result = publish(turn, `ref`, v)
   retract(turn, h)
 
+proc replace*[T](turn: var Turn; `ref`: Ref; h: var Handle; v: T): Handle {.discardable.} =
+  var old = h
+  h = publish(turn, `ref`, v)
+  retract(turn, old)
+  h
+
 proc stop*(turn: var Turn) {.gcsafe.}
 
 proc run*(facet; action: TurnAction; zombieTurn = false) {.gcsafe.}

syndicate.nimble

@@ -1,6 +1,6 @@
 # Package
 
-version       = "1.3.0"
+version       = "1.3.1"
 author        = "Emery Hemingway"
 description   = "Syndicated actors for conversational concurrency"
 license       = "Unlicense"