[GHC] #2986: :info printing instances often isn't wanted

GHC cvs-ghc at haskell.org
Wed Feb 15 14:11:20 CET 2012


#2986: :info printing instances often isn't wanted
---------------------------------+------------------------------------------
    Reporter:  Remi              |       Owner:                  
        Type:  feature request   |      Status:  new             
    Priority:  lowest            |   Milestone:  7.6.1           
   Component:  GHCi              |     Version:  6.10.1          
    Keywords:  :info instances   |          Os:  Unknown/Multiple
Architecture:  Unknown/Multiple  |     Failure:  None/Unknown    
  Difficulty:  Unknown           |    Testcase:                  
   Blockedby:                    |    Blocking:                  
     Related:                    |  
---------------------------------+------------------------------------------

Comment(by simonpj):

 UI suggestion.  I suggest that
  * `:info C` never mentions instances of C
  * `:instance C` describes all instances involving C

 There's also a current bug which is that we don't currently report type-
 family instance at all.

 I personally dislike the "-" syntax; very un-discoverable.

 Simon

-- 
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2986#comment:16>
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