[GHC] #15959: If a type signature is too long to read left-to-right then let it read top-to-bottom.

27 Nov 2018

      #15959: If a type signature is too long to read left-to-right then let it read top-
to-bottom.
-------------------------------------+-------------------------------------
           Reporter:  philderbeast   |             Owner:  (none)
               Type:  feature        |            Status:  new
  request                            |
           Priority:  normal         |         Milestone:  8.6.3
          Component:  Compiler       |           Version:  8.6.2
           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 pretty printing a type signature that is too long to show in one
 line, can we please break the lines on the top-level punctuation of the
 type signature, on {{{::}}}, {{{=>}}} and {{{->}}} as shown in the second
 listing below?

 {{{
 FlareTiming/Task/Score.hs:186:1: warning: [-Wmissing-signatures]
     Top-level binding with no type signature:
       showMax :: (Reflex t, Functor f) =>
                  (a -> b)
                  -> (f b -> b -> c) -> Dynamic t (f a) -> Dynamic t a ->
 Dynamic t c
     |
 186 | showMax getField f pt points =
     | ^^^^^^^
 }}}

 {{{
 FlareTiming/Task/Score.hs:186:1: warning: [-Wmissing-signatures]
     Top-level binding with no type signature:
       showMax
         :: (Reflex t, Functor f)
         => (a -> b)
         -> (f b -> b -> c)
         -> Dynamic t (f a)
         -> Dynamic t a
         -> Dynamic t c

     |
 186 | showMax getField f pt points =
     | ^^^^^^^
 }}}

  If a type signature is too long to display in one line and read left-to-
 right then please let it read top-to-bottom.

-- 
Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/15959
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