30 Sep
2014
30 Sep
'14
2:11 p.m.
On Tue, Sep 30, 2014 at 1:52 PM, Doug McIlroy
Ghci complains, "Could not deduce (Show a) arising from the superclasses of an instance declaration from the context (Num a)". Yet Show is a superclass of Num. Hugs accepts the code.
Show used to be a superclass of Num. It's not in current ghc, and will probably be removed from the next version of the language standard. -- brandon s allbery kf8nh sine nomine associates allbery.b@gmail.com ballbery@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net