[GHC] #10900: Suggestions for improvement of the PatternSynonyms chapter in the User's Guide

[GHC]

#10900: Suggestions for improvement of the PatternSynonyms chapter in the User's
Guide
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        Reporter:  thomie            |                   Owner:  mpickering
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:
       Component:  Documentation     |                 Version:  7.10.2
      Resolution:                    |                Keywords:
                                     |  PatternSynonms
Operating System:  Unknown/Multiple  |            Architecture:
 Type of failure:  Documentation     |  Unknown/Multiple
  bug                                |               Test Case:
      Blocked By:                    |                Blocking:
 Related Tickets:                    |  Differential Revisions:
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Changes (by mpickering):

 * owner:   => mpickering


Comment:

 Thanks Thomas for the notes. I think much of the confusion around
 *pattern* synonyms is that the pattern part is (now) only a small part of
 what they are. A perhaps nicer way to think about them is as normal data
 constructors but not attached to a specific type like normal data
 constructors. After declaring a bidirectional synonym

 {{{
 pattern P x = [x]
 }}}

 then `P` should behave (nearly) exactly like a data constructor but
 instead of constructing some type `Q`, constructs lists.

 I will try to improve this section whilst working on D1152.

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10900#comment:1>
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