Added support for null and undefined JS types

.gitignore

@@ -1,3 +1,4 @@
 go.sum
 webfiles/ab0x.go
-.vscode/
+.vscode/
+/*.dll

muon.go

@@ -180,12 +180,20 @@ func (w *Window) makeIPCCallback(f *ipf) func(JSContextRef, JSObjectRef, JSObjec
 			panic("Javascript does not support more than 1 return value!")
 		}
 
+		if len(val) == 0 {
+			return JSValueMakeNull(ctx)
+		}
+
 		return toJSValue(ctx, val[0])
 
 	}
 }
 
 func fromJSValue(ctx JSContextRef, value JSValueRef, rtype reflect.Type) (reflect.Value, error) {
+	if rtype == nil {
+		rtype = reflect.TypeOf(struct{}{})
+	}
+
 	var rv reflect.Value
 	var err error
 
@@ -205,7 +213,7 @@ func fromJSValue(ctx JSContextRef, value JSValueRef, rtype reflect.Type) (reflec
 			val, err := fromJSValue(ctx, ref, rtype.Elem())
 
 			if err != nil {
-				return reflect.Value{}, err
+				return reflect.Zero(rtype), err
 			}
 
 			values.Index(i).Set(val)
@@ -232,8 +240,8 @@ func fromJSValue(ctx JSContextRef, value JSValueRef, rtype reflect.Type) (reflec
 		}
 
 		JSStringRelease(ref)
-	default:
-		panic("Not implemented")
+	case KJSTypeUndefined, KJSTypeNull:
+		rv = reflect.Zero(rtype)
 	}
 
 	return rv, err

muon_test.go

@@ -95,3 +95,31 @@ func TestArrayType(t *testing.T) {
 		t.Errorf("nums[2] was not 3, got %f", nums[2])
 	}
 }
+
+func TestEmptyType(t *testing.T) {
+	cfg := &Config{
+		Height: 1,
+		Width:  1,
+	}
+
+	m := New(cfg, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {}))
+
+	m.Bind("test", func(nullValue string, undefinedValue string) {
+		if nullValue != "" {
+			t.Errorf("nullType was not empty!")
+		}
+		if undefinedValue != "" {
+			t.Errorf("undefinedType was not empty!")
+		}
+	})
+
+	go func() {
+		m.Start()
+	}()
+
+	_, err := m.Eval(`test(null, undefined)`, nil)
+
+	if err != nil {
+		t.Error(err)
+	}
+}