Use "do ():" for compatibility with Nim 2.0.0

src/syndicate/actors.nim

@@ -393,7 +393,7 @@ proc spawn*(name: string; turn: var Turn; bootProc: TurnAction; initialAssertion
     var newOutBound: Table[Handle, OutboundAssertion]
     for key in initialAssertions:
       discard turn.facet.outbound.pop(key, newOutbound[key])
-    callSoon:
+    callSoon do ():
       discard newActor(name, bootProc, newOutBound)
 
 proc newInertRef*(): Ref =
@@ -413,7 +413,7 @@ proc terminate(actor; turn; reason: ref Exception) =
         actor.future.complete()
       else:
         actor.future.fail reason
-    callSoon:
+    callSoon do ():
       run(actor.root, finish, true)
 
 proc terminate*(facet; e: ref Exception) =
@@ -423,7 +423,7 @@ proc terminate*(facet; e: ref Exception) =
 proc asyncCheck*(turn; fut: FutureBase) =
   ## Sets a callback on `fut` which propagates exceptions to the facet of `turn`.
   let facet = turn.facet
-  fut.addCallback do:
+  fut.addCallback do ():
     if fut.failed: terminate(facet, fut.error)
 
 template tryFacet(facet; body: untyped) =
@@ -433,7 +433,7 @@ template tryFacet(facet; body: untyped) =
   #except: terminate(facet, getCurrentException())
 
 proc run(queues: Queues) =
-  callSoon:
+  callSoon do ():
     for facet, queue in queues:
       for action in queue: run(facet, action)
 
@@ -459,7 +459,7 @@ proc addCallback*(fut: FutureBase; turn: var Turn; act: TurnAction) =
   if fut.finished:
     enqueue(turn, facet, act)
   else:
-    fut.addCallback do:
+    fut.addCallback do ():
       run(facet, act)
 
 proc addCallback*[T](fut: Future[T]; turn: var Turn; cb: proc (t: var Turn; f: Future[T]) {.closure, gcsafe.}) =

src/syndicate/peers.nim

@@ -31,7 +31,7 @@ proc connectNet*(turn: var Turn; remote: RemoteSpecifier; cap: SturdyRef; bootPr
     reenable = facet.preventInertCheck()
     connectionClosedRef = newRef(turn, ShutdownEntity())
     conn = connectTcp(remote)
-  conn.onReady do:
+  conn.onReady do ():
     discard bootActor("net") do (turn: var Turn):
       var shutdownRef: Ref
       proc tapsWriter(pkt: sink Packet): Future[void] =
@@ -53,7 +53,7 @@ proc connectNet*(turn: var Turn; remote: RemoteSpecifier; cap: SturdyRef; bootPr
           terminate(facet, reason)
         conn.onReceiveError do (ctx: MessageContext; reason: ref Exception):
           terminate(facet, reason)
-        conn.onClosed do:
+        conn.onClosed do ():
           run(facet) do (turn: var Turn):
             stopActor(turn)
         var wireBuf = newBufferedDecoder()

src/syndicate/relays.nim

@@ -112,7 +112,7 @@ proc send(r: Relay; pkt: sink Packet): Future[void] =
 
 proc send(r: Relay; rOid: protocol.Oid; m: Event) =
   if r.pendingTurn.len == 0:
-    callSoon:
+    callSoon do ():
       r.facet.run do (turn: var Turn):
         var pkt = Packet(
           orKind: PacketKind.Turn,