added a `noforward` pragma that enables a new compilation strategy

not requiring forward declarations on a per-module basis

compiler/semcall.nim

@@ -32,6 +32,8 @@ proc sameMethodDispatcher(a, b: PSym): bool =
       # be disambiguated by the programmer; this way the right generic is
       # instantiated.
   
+proc determineType(c: PContext, s: PSym)
+
 proc resolveOverloads(c: PContext, n, orig: PNode, 
                       filter: TSymKinds): TCandidate =
   var initialBinding: PNode
@@ -58,6 +60,7 @@ proc resolveOverloads(c: PContext, n, orig: PNode,
 
   while sym != nil:
     if sym.kind in filter:
+      determineType(c, sym)
       initCandidate(z, sym, initialBinding, o.lastOverloadScope)
       z.calleeSym = sym
       matches(c, n, orig, z)