Function calling in structs

tests/struct.grnd

@@ -2,23 +2,28 @@ struct -point
     init &xpos -int
     init &ypos -int
 
-    fun -void !init -int &x -int &y
+    fun -int !init -int &x -int &y
         set &xpos $x
         set &ypos $y
-        return
+        return 0
     endfun
 
     fun -string !toString
-        # do stuff
-        return "placeholder"
-    endfun
-
-    fun -int !dingle
-        return 23
+        tostring $xpos &xposstr
+        tostring $ypos &yposstr
+        add "x: " $xposstr &str
+        add $str ", y: " &str
+        add $str $yposstr &str
+        return $str
     endfun
 endstruct
 
 init &myPoint -point
 
-set &myPoint.xpos 20
+pusharg 30 15
+!myPoint.init &out
 println $myPoint.xpos
+
+!myPoint.toString &out
+
+println $out