(

(library "alterto.yql")
(import alterto_module '"alterto.yql")

(let config (DataSource 'config))
(let res_sink (DataSink 'result))

# Int32? -> Uint16
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1)) (DataType 'Uint16) (Uint16 '12345)))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1000000)) (DataType 'Uint16) (Uint16 '12345)))
(let world (Apply (bind alterto_module 'doAlterTo) world (Nothing (OptionalType (DataType 'Int32))) (DataType 'Uint16) (Uint16 '12345)))

# Int32? -> Uint16?
(let targetType (OptionalType (DataType 'Uint16)))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1)) targetType (Just (Uint16 '12345))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1000000)) targetType (Just (Uint16 '12345))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Nothing (OptionalType (DataType 'Int32))) targetType (Just (Uint16 '12345))))

# Int32? -> Uint16???
(let targetType (OptionalType (OptionalType (OptionalType (DataType 'Uint16)))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1)) targetType (Just (Just (Just (Uint16 '12345))))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Int32 '1000000)) targetType (Just (Just (Just (Uint16 '12345))))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Nothing (OptionalType (DataType 'Int32))) targetType (Just (Just (Just (Uint16 '12345))))))

# Int32??? -> Uint16?
(let targetType (OptionalType (DataType 'Uint16)))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Just (Just (Int32 '1)))) targetType (Just (Uint16 '12345))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Just (Just (Int32 '1000000)))) targetType (Just (Uint16 '12345))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Nothing (OptionalType (OptionalType (OptionalType (DataType 'Int32))))) targetType (Just (Uint16 '12345))))
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Nothing (OptionalType (OptionalType (DataType 'Int32))))) targetType (Just (Uint16 '12345)))) 
(let world (Apply (bind alterto_module 'doAlterTo) world (Just (Just (Nothing (OptionalType (DataType 'Int32))))) targetType (Just (Uint16 '12345))))

# Int32? -> Null
(let targetType (NullType))
(let alterToResult (AlterTo (Just (Int32 '1))  targetType (lambda '(x) (String '"converted")) (String '"not converted")))
(let world (Write! world res_sink (Key) alterToResult '('('type))))
(let alterToResult (AlterTo (Nothing (OptionalType (DataType 'Int32))) targetType (lambda '(x) (String '"converted")) (String '"not converted")))
(let world (Write! world res_sink (Key) alterToResult '('('type))))

# Int64? -> Null?
(let targetType (NullType))
(let alterToResult (AlterTo (Just (Int64 '1))  targetType (lambda '(x) (String '"converted")) (String '"not converted")))
(let world (Write! world res_sink (Key) alterToResult '('('type))))
(let alterToResult (AlterTo (Nothing (OptionalType (DataType 'Int64))) targetType (lambda '(x) (String '"converted")) (String '"not converted")))
(let world (Write! world res_sink (Key) alterToResult '('('type))))

(let world (Commit! world res_sink))
(return world)

)