[Haskell-cafe] Type inference doesn't always calculate the most generic type?

Brandon Allbery allbery.b at gmail.com
Thu May 28 21:00:15 UTC 2015

On Thu, May 28, 2015 at 4:54 PM, Francesco Ariis <fa-ml at ariis.it> wrote:

> I just fired up ghci:
>     λ> let mapabs = map abs
>     λ> :t mapabs
>     mapabs :: Num b => [b] -> [b]
> ghc 7.10.1

Sufficiently recent ghc disables the monomorphism restriction inside ghci
(only --- compiled code, including code compiled by ghci, as opposed to
code entered at the prompt, still uses it).
Try ":seti".

brandon s allbery kf8nh                               sine nomine associates
allbery.b at gmail.com                                  ballbery at sinenomine.net
unix, openafs, kerberos, infrastructure, xmonad        http://sinenomine.net
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