[GHC] #9789: Make GHC accept .format+lhs as extension for literate haskell files

[GHC]

#9789: Make GHC accept .format+lhs as extension for literate haskell files
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              Reporter:  merijn      |            Owner:  merijn
                  Type:  feature     |           Status:  new
  request                            |        Milestone:
              Priority:  normal      |          Version:  7.9
             Component:  Compiler    |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:              |  Related Tickets:
  None/Unknown                       |
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by thomie):

 Some hopefully constructive comments:

 * This proposal could use a [wiki:WorkingConventions/AddingFeatures wiki
 page] I think. It would describe the problem being addressed, the
 different proposals that were made, and why this solution was chosen
 (accepting `.format+lhs` as a file extension).

 * Maybe some combination of `-o` and
 [https://www.haskell.org/ghc/docs/7.8.3/html/users_guide/modes.html
 #overriding-suffixes  -x] command line options could be used to get the
 same effect?

 * This [https://www.haskell.org/pipermail/glasgow-haskell-
 users/2014-March/024757.html mail] (proposing `.hs.format`) and
 [https://www.haskell.org/pipermail/glasgow-haskell-
 users/2014-March/024747.html this one] (prososing a textual fingerprint in
 the module itself) never got a reply.

 * How does this feature interact with
 [https://www.haskell.org/ghc/docs/latest/html/users_guide/separate-
 compilation.html boot files]: "Currently, if you use a literate source
 file A.lhs you must also use a literate boot file, A.lhs-boot; and vice
 versa."

 * How does this change affect other compilers (JHC was mentioned)?

 * Would this change need to go into a feature language report? Is it a
 language feature, does it need a flag? (I'm just trying to think if this
 change is a big deal or not, maybe I am overthinking things.)

--
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9789#comment:1>
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