= IfStmt Expr [Stmt] [Stmt]
| WhileStmt Expr [Stmt]
| AssStmt VarDef Expr
- | FunStmt String [Expr]
+ | FunStmt String [Expr] [FieldSelector]
| ReturnStmt (Maybe Expr)
instance toString Pos
instance toString FieldSelector
instance toString Op2
instance toString Expr
+instance toString VarDecl
instance zero Pos
instance == Op1