Create type with macro that depends on other types in a type block

[enthus1ast]

I create a type in a macro which depends on other type ( i create the World 
type) The issue is that the world type depends on other types (Store and 
Entity) which are in the same typeblock. It seems that i cannot call the create 
macro inside the type block to create the type. When i call the gen macro above 
or below the type block there are types missing. Any idea how i can do this?
    
    
    type
      #  i want to create the world type
      World = ref object
        guids: GUID
        storeHealthAble: Store[CompHealthAble]
        storeDrawAble: Store[CompDrawAble]
        storeNameAble: Store[CompNameAble]
      Entity = object
        id: GUID
        world: World
      Store[T] = Table[Entity,T]
      
      # Following for completeness.
      Component = enum
        DrawAble, HealthAble, NameAble
    
    
    
    Run

the type creation macro which creates World:
    
    
    macro genWorld() =
      
      var typeTree = newNimNode(nnkRecList)
      typeTree.add nnkIdentDefs.newTree(
          newIdentNode("guids"),
          newIdentNode("GUID"),
          newEmptyNode()
        )
      for component in Component:
        typeTree.add nnkIdentDefs.newTree(
          newIdentNode("store" & $component ),
          nnkBracketExpr.newTree(
            newIdentNode("Store"),
            newIdentNode("Comp" & $component)
          ),
          newEmptyNode()
        )
      
      result = nnkStmtList.newTree(
        nnkTypeSection.newTree(
          nnkTypeDef.newTree(
            newIdentNode("World"),
            newEmptyNode(),
            nnkRefTy.newTree(
              nnkObjectTy.newTree(
                newEmptyNode(),
                newEmptyNode(),
                typeTree
              )
            )
          )
        )
      )
    
    
    Run