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2014-09-30 14:13:09 | ||
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=>
eval:2:0: Type Checker: Polymorphic function `map' could not
be applied to arguments:
Types: (-> a c) (Pairof a (Listof a)) -> (Pairof c (Listof
c))
(-> a b ... b c) (Listof a) (Listof b) ... b ->
(Listof c)
Arguments: (-> (Rec B (U Symbol (Listof B))) String) (Rec A
(Listof (U Symbol A)))
Expected result: (Listof String)
in: xs