Created
August 12, 2015 06:41
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Existential Types Recovering
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| type printable = Printable : 'a * ('a-> string) -> printable;; | |
| let myList = [Printable (2, string_of_int); Printable (true, string_of_bool)];; | |
| let printPrintable: printable -> string = fun p -> | |
| let Printable (data, printer) = p in | |
| printer data | |
| ;; | |
| let printables = [Printable (2, string_of_int); Printable (true, string_of_bool)];; | |
| let results = List.map printPrintable printables;; |
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