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Incorrect type inferred for untypable expression #6

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jdh30 opened this issue Sep 16, 2018 · 0 comments

jdh30 commented Sep 16, 2018

The inference:

> (fun a -> (fun b -> a(a b))) (fun c -> (fun d -> (fun e -> e c d)))
(('a -> (('b -> ('a -> 'c)) -> 'c)) -> ('a -> ((('a -> (('b -> ('a -> 'c)) -> 'c)) -> ('a -> 'c)) -> 'c)))

is wrong. The actual type is recursive:

# (fun a -> (fun b -> a(a b))) (fun c -> (fun d -> (fun e -> e c d)));;
- : ('_b -> ('a -> '_b -> '_c) -> '_c as 'a) -> 'a = <fun>

So it should be rejected by Algorithm W.

The text was updated successfully, but these errors were encountered:

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