[GHC] #15356: Template Haskell should turn off RebindableSyntax in quotes

GHC ghc-devs at haskell.org
Sun Jul 8 23:19:10 UTC 2018


#15356: Template Haskell should turn off RebindableSyntax in quotes
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           Reporter:  goldfire       |             Owner:  (none)
               Type:  bug            |            Status:  new
           Priority:  normal         |         Milestone:  8.6.1
          Component:  Template       |           Version:  8.4.3
  Haskell                            |
           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:
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 If I say

 {{{#!hs
 {-# LANGUAGE RebindableSyntax, TemplateHaskellQuotes #-}

 module Bug ( quote ) where

 quote = [| if 5>3 then 'x' else 'y' |]
 }}}

 GHC complains that `ifThenElse` and `fromInteger` are not in scope. If I
 then bring these into scope somehow, then the resulting quote does not use
 them.

 I think it's correct that the resulting quote doesn't use the rebindable
 syntax -- a quote should just stand for a convenient way or writing the TH
 AST. But then we shouldn't complain about missing rebindable syntax bits
 inside of a quote.

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15356>
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