Currently GHCi shows the "real" type of an expression (i.e., the inferred generalized type), when you ask it: Prelude> :t 1 1 :: Num a => a Note that there is no defaulting happening, at least at the top level---of course if there were local things that needed to be defaulted while the expression was being type-checked then those would be defaulted. If you ask GHCi to *evaluate* a polymorphic expression, then it will try to default the type when it is figuring out how to show the result. The alternative would be to say "sorry, I can't evaluate this, because it is polymorphic, so please tell me what type do you mean". This is probably a bit too inconvenient for practical use. -Iavor On Thu, Apr 28, 2016 at 5:24 AM, Johannes Waldmann < johannes.waldmann@htwk-leipzig.de> wrote:
.. :type should report the real type
What about defaulting? Is it real? https://ghc.haskell.org/trac/ghc/ticket/11994
- J.W. _______________________________________________ ghc-devs mailing list ghc-devs@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs