next steps for full closure support

tests/run/tinterf.nim

@@ -1,20 +1,24 @@
 discard """
-  output: '''56'''
+  output: '''56 66'''
 """
 
 type
   ITest = tuple[
     setter: proc(v: int) {.closure.},
-    getter: proc(): int {.closure.}]
+    getter1: proc(): int {.closure.},
+    getter2: proc(): int {.closure.}]
 
 proc getInterf(): ITest =
-  var shared: int
+  var shared, shared2: int
   
-  return (setter: proc (x: int) = shared = x,
-          getter: proc (): int = return shared)
+  return (setter: proc (x: int) = 
+            shared = x
+            shared2 = x + 10,
+          getter1: proc (): int = result = shared,
+          getter2: proc (): int = return shared2)
 
 var i = getInterf()
 i.setter(56)
 
-echo i.getter()
+echo i.getter1(), " ", i.getter2()