Re: [Haskell-beginners] How do ambigious types compile with Aeson

That explains it, thank you! On Sun, Sep 13, 2015, 03:20 Brandon Allbery wrote:

On Sat, Sep 12, 2015 at 9:15 PM, Sevcsik András wrote:

...

How it's decided what type should Aeson try to decode to? What type is that gives me Nothing on whatever JSON input I give?

ghci has ExtendedDefaultRules enabled, which means that many things will infer a type of () if one cannot otherwise be determined. This is not something Aeson has control over. Try ":seti -XNoExtendedDefaultRules" and ask ghci again; it should produce an ambiguous type error.

-- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners

-- Minden jót, Sevcsik András