[GHC] #11660: Remove Type pretty-printer in favor of IfaceType

[GHC]

#11660: Remove Type pretty-printer in favor of IfaceType
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  patch
        Priority:  high              |            Milestone:  8.2.1
       Component:  Compiler          |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #12550, #12447,   |  Differential Rev(s):  Phab:D2528
  #11786, #11549, #12024, #12697,    |
  #12510                             |
       Wiki Page:                    |
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Comment (by Ben Gamari <ben@…>):

 In [changeset:"6c0f10fac767c49b65ed71e8eb8e78ca4f9062d5/ghc" 6c0f10f/ghc]:
 {{{
 #!CommitTicketReference repository="ghc"
 revision="6c0f10fac767c49b65ed71e8eb8e78ca4f9062d5"
 Kill Type pretty-printer

 Here we consolidate the pretty-printing logic for types in IfaceType. We
 need IfaceType regardless and the printer for Type can be implemented in
 terms of that for IfaceType. See #11660.

 Note that this is very much a work-in-progress. Namely I still have yet
 to ponder how to ease the hs-boot file situation, still need to rip out
 more dead code, need to move some of the special cases for, e.g., `*` to
 the IfaceType printer, and need to get it to validate. That being said,
 it comes close to validating as-is.

 Test Plan: Validate

 Reviewers: goldfire, austin

 Subscribers: goldfire, thomie, simonpj

 Differential Revision: https://phabricator.haskell.org/D2528

 GHC Trac Issues: #11660
 }}}

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11660#comment:19>
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