[GHC] #11955: Haddock documentation for pattern synonyms printed with explicit forall quantifiers

19 Apr 2016

      #11955: Haddock documentation for pattern synonyms printed with explicit forall
quantifiers
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           Reporter:  darchon        |             Owner:
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.0.1
          Component:  Compiler       |           Version:  8.0.1-rc3
           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:
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 Running haddock on:

 {{{#!hs
 {-# LANGUAGE PatternSynonyms #-}

 module Foo ( A(..), pattern P ) where

 data A a = A a

 pattern P :: a -> A a
 pattern P a <- A a
 }}}

 in GHC 7.10.3 gives haddock documentation for P in the form of:

 {{{
 pattern P :: a -> A a
 }}}

 while the haddock in GHC 8.0.1-rc3 gives haddock documentation for P in
 the form of:

 {{{
 pattern P :: forall a. a -> A a
 }}}

 I think GHC/Haddock should not be adding the forall quantifier, and hence
 think the behaviour in GHC 8.0.1-rc3 is wrong, and the behaviour of GHC
 7.10.3 is preferred.

--
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11955
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