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Lexer: Alternate Layout Rule injects actual not virtual braces

    • Closed Issue created by Alan Zimmerman @alanz

    When the alternate layout rule is activated via a pragma, it injects tokens for { and } to make sure that the source is parsed properly.

    But it injects ITocurly and ITccurly, rather than their virtual counterparts ITvocurly and ITvccurly.

    This causes problems for ghc-exactprint, which tries to print these.

    Test case (the existing T13087.hs)

    {-# LANGUAGE AlternativeLayoutRule #-}
{-# LANGUAGE LambdaCase            #-}

isOne :: Int -> Bool
isOne = \case 1 -> True
              _ -> False

main = return ()
    Trac metadata
    Trac field Value
    Version 8.6.3
    Type Bug
    TypeOfFailure OtherFailure
    Priority normal
    Resolution Unresolved
    Component Compiler (Parser)
    Test case
    Differential revisions
    BlockedBy
    Related
    Blocking
    CC
    Operating system
    Architecture
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