fixes #531

tests/manyloc/named_argument_bug/gui.nim

@@ -0,0 +1,44 @@
+import
+  tri_engine/gfx/gl/primitive,
+  tri_engine/gfx/tex,
+  tri_engine/gfx/color,
+  tri_engine/math/rect,
+  tri_engine/math/vec
+
+type
+  TWidgetLayer* = enum
+    wlBg      = 100,
+    wlOverlap = 200,
+    wlMain    = 300,
+    wlOverlay = 400,
+    wlCursor  = 500
+  TWidgetLayerType = TWidgetLayer|int
+  TWidgetType* = enum
+    wtImg
+  PWidget* = ref object
+    `type`* : TWidgetType
+    layer*  : TWidgetLayer
+    rect*   : TRect
+    prim*   : PPrimitive
+
+const
+  baseZ = 5000
+
+proc newWidget*(`type`: TWidgetType, layer: TWidgetLayerType, rect: TRect): PWidget =
+  new(result)
+  result.`type` = `type`
+  result.layer = layer
+  result.rect = rect
+
+  var verts = newVert(rect)
+
+  # This works because z is accessible at this scope.
+  #var z = baseZ + layer.int
+  #result.prim = newPrimitive(verts, z=z)
+
+  # Doesn't work, because the compiler looks for a symbol called z in this scope,
+  # but it should only check that it is the name of one of the params.
+  #result.prim = newPrimitive(verts, z=baseZ + layer.int)
+
+  # This doesn't work either.
+  result.prim = newPrimitive(verts, z=0)