úÎIâDD0      !"#$%&'()*+,-./None&'(2346=HJKM as is a cluss, where as) is a list of type patterns. Normally, as; is concrete and does not contain any type variables, like /In [Binary (->) (Show >|< This), Type String] a. When a satisfies In as a, you can use the method  ::  as f -> f a. TClusses call for some language extensions. Basically, this language pragma will do.  <{-# LANGUAGE DataKinds, FlexibleContexts, TypeOperators #-} 3Internally, "type pattern matching" is executed by 0R, a closed type family, which cannot check if a type satisfies a constraint. If as' has many type patterns that can match a, only the first one matches a.  as f- is a tuple that contains values of the type f a , where a can be any type that satisfies In as aE. Each value corresponds to each type pattern, and the values in  as f3 must be in the same order as the type patterns in as. 1, 2, 3, ..., 4& are used to combine the values and 5- must be added at the end. You have to use 1 for  a, 2 for  a p, 3 for  a p , ..., 4 for  a p.  (Is a) b == (a ~ b) 0(p >|||||< q) a b c d e f == (p a b c d e, q f) +(p >||||< q) a b c d e == (p a b c d, q e) &(p >|||< q) a b c d == (p a b c, q d) !(p >||< q) a b c == (p a b, q c) (p >|< q) a b == (p a, q b)  =(p >++++++< q) a b c d e f == (p a b c d e f, q a b c d e f)  6(p >+++++< q) a b c d e == (p a b c d e, q a b c d e)  /(p >++++< q) a b c d == (p a b c d, q a b c d)  ((p >+++< q) a b c == (p a b c, q a b c)  !(p >++< q) a b == (p a b, q a b)  (p >+< q) a == (p a, q a)  a' is equivalent to the empty constraint ().  Pure a == () ( creates a recursion. In other words,  will work as  as7 itself when used in the type list (first parameter) as of , combined with , <|, , , ..., , >+<, >++<, ..., >++++++<, >|<, >||<, ..., >|||||<.  Note that  won't be expanded into  asa if the condition described above is not satisfied. Internally, the expansion is executed by 6, 7, ..., 8. The instance of - itself can't be created since the context  True~False will never be satisfied. ŸThere is no predetermined limit of recursion depth, but GHC has a fixed-depth recursion stack for safety, so you may need to increase the stack depth with -fcontext-stack=N. a <| p, with a being of the kind  i -> i' -> i'' -> i''' -> i'''' -> i''''' -> k and p,  i -> i' -> i'' -> i''' -> i'''' -> i''''' -> 9. a <| p, with a being of the kind  i -> i' -> i'' -> i''' -> i'''' -> k and p,  i -> i' -> i'' -> i''' -> i'''' -> 9. a <| p, with a being of the kind  i -> i' -> i'' -> i''' -> k and p,  i -> i' -> i'' -> i''' -> 9. a <| p, with a being of the kind  i -> i' -> i'' -> k and p,  i -> i' -> i'' -> 9. a <| p, with a being of the kind  i -> i' -> k and p,  i -> i' -> 9. a <| p, with a being of the kind i -> k and p, i -> 9. The empty type a <| p is a type pattern, where a is a type constructor, and pE is a constraint function for the type variables for the constructor a". For example, the type pattern  [] <| Show corresponds to $instance (Show a) => C [a] where ... (C is a type class). You can replace any of , , ...,  with <|F, but you can sometimes save the effort of annotating kinds using , , ...,  instead of <|, especially when using  PolyKinds< extension, because kinds of parameters are restricted in , , ..., . The empty type Type a4 is a type pattern. For example, the type pattern Type Int corresponds to instance C Int where ... (C1 is a type class). Note that the type variable a can be of any kind. m:;<=>?@A8BCD760 EFG54HIJ321 !"#$%&'()*+,-./KLMNOPQRSTUVWXYZ[\]^_`abcdefghijklm8 54HIJ321 !"#$%&'()*+,-./0  !"#$%&'()*+,-./_:;<=>?@A8BCD760 EFG !"#$%&'()*+,-./KLMNOPQRSTUVWXYZ5[4\H]I^J_3`2a1bcdefghijklm!           4HIJ321 !"#$'()*+,-n      !"#$%&'()*+,-./0123456789:;<=>>?@@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnop cluss-0.1 Type.ClussAllOfF'AllOfFAllOfI'AllOfIInprojAllOf'AllOfIs>|||||<>||||<>|||<>||<>|<>++++++<>+++++<>++++<>+++<>++<>+<PureThisSenaryQuinary QuaternaryTernaryBinaryUnary<|TypeandIandI1andI2andI3andI4andI5andI6noneIprojIandFandF1andF2andF3andF4andF5andF6noneFprojFWhereAndAnd1And2And6NoneModifyModify2Modify6ghc-primGHC.Prim ConstraintFuncunFuncIdunIdIn'proj'Modify5Modify4Modify3No_I_Don't_Have_That Look_At_Tail Look_At_HeadAnd5And4And3$fIn'kLook_At_Tailts:a$fIn'kLook_At_Tailts:a0$fIn'kLook_At_Tailts:a1$fIn'kLook_At_Tailts:a2$fIn'kLook_At_Tailts:a3$fIn'kLook_At_Tailts:a4$fIn'kLook_At_Tailts:a5$fIn'kLook_At_Headts:a$fIn'kLook_At_Headts:a0$fIn'kLook_At_Headts:a1$fIn'kLook_At_Headts:a2$fIn'kLook_At_Headts:a3$fIn'kLook_At_Headts:a4$fIn'kLook_At_Headts:a5$fInkasaTFCo:R:AllOf'kts[]fTFCo:R:AllOf'kts:fTFCo:R:AllOf'kts:f0TFCo:R:AllOf'kts:f1TFCo:R:AllOf'kts:f2TFCo:R:AllOf'kts:f3TFCo:R:AllOf'kts:f4TFCo:R:AllOf'kts:f5$f>|||||||||||||||+++++++++++++++++++++