Fixed broken class instance check in FunctionToInstanceMethodPass.

Fixes #1081.

Author: tritao

src/Generator/Passes/FunctionToInstanceMethodPass.cs

@@ -18,6 +18,9 @@ public override bool VisitMethodDecl(Method method)
 
         public override bool VisitFunctionDecl(Function function)
         {
+            if (AlreadyVisited(function))
+                return false;
+
             if (!function.IsGenerated)
                 return false;
 
@@ -79,7 +82,7 @@ public static bool GetClassParameter(Parameter classParam, out Class @class)
             if (classParam.Type.IsPointerTo(out tag))
             {
                 @class = tag.Declaration as Class;
-                return true;
+                return @class != null;
             }
 
             return classParam.Type.TryGetClass(out @class);

tests/Native/Passes.h

@@ -77,3 +77,10 @@ class ClassWithAbstractOperator
 {
   virtual operator int() = 0;
 };
+
+enum ConnectionRole
+{
+    Role1, Role2
+};
+
+bool ConnectionRoleToString(const ConnectionRole& role, const char* role_str);