[GHC] #13843: Expand type information collected (:set +c), used by :all-types, :type-at, ..

[GHC]

#13843: Expand type information collected (:set +c), used by :all-types, :type-at,
..
-------------------------------------+-------------------------------------
           Reporter:  Iceland_jack   |             Owner:  (none)
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:
          Component:  Compiler       |           Version:  8.3
           Keywords:                 |  Operating System:  Unknown/Multiple
       Architecture:                 |   Type of failure:  None/Unknown
  Unknown/Multiple                   |
          Test Case:                 |        Blocked By:
           Blocking:                 |   Related Tickets:
Differential Rev(s):                 |         Wiki Page:
-------------------------------------+-------------------------------------
 When [collecting type information
 https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/ghci.html
 #ghci-cmd-:set%20+c] (`:set +c`) GHC does not collect type information
 from type variables in type synonyms

 {{{#!hs
 type Endo a = a -> a
 }}}

 data types and families

 {{{#!hs
 data List a = Nil | a ::: List a
 }}}

 fixity declarations

 {{{#!hs
 infixr 5 :::
 }}}

 type class declarations

 {{{#!hs
 class A a where
   getA :: a
 }}}

 and type families.. probably other things: the feature appeared one GHC
 version ago so, has this just not been implemented yet?

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13843>
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