[GHC] #10018: Cannot define custom fixity for infix data constructors in GHCi

[GHC]

#10018: Cannot define custom fixity for infix data constructors in GHCi
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        Reporter:  RyanGlScott       |                   Owner:
            Type:  bug               |                  Status:  new
        Priority:  normal            |               Milestone:  7.12.1
       Component:  GHCi              |                 Version:  7.10.1-rc2
      Resolution:                    |                Keywords:
Operating System:  Unknown/Multiple  |            Architecture:
                                     |  Unknown/Multiple
 Type of failure:  Incorrect result  |               Test Case:
  at runtime                         |  ghci/scripts/T10018
      Blocked By:                    |                Blocking:
 Related Tickets:  #9830, #2947,     |  Differential Revisions:  Phab:D1028
  #4929                              |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"e809ef57d841695f76ab9b2758f7aeb774d6b223/ghc" e809ef5/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="e809ef57d841695f76ab9b2758f7aeb774d6b223"
 ghci: fixity declarations for infix data constructors (#10018)

 Declaring a custom fixity for an infix data constructor should work:

     Prelude> data Infix a b = a :@: b; infixl 4 :@:

 This is a followup to #2947, which handled fixity declarations in ghci
 statements (e.g. let add = (+); infixl 6 `add`).

 Support for declarations (data, type, newtype, class, instance,
 deriving, and foreign) was added to GHCi in #4929.

 Reviewers: simonpj, austin, thomie

 Subscribers: thomie, bgamari

 Differential Revision: https://phabricator.haskell.org/D1028

 GHC Trac Issues: #10018
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10018#comment:7>
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