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

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