• Alan Zimmerman's avatar
    Remove fun_infix from Funbind, as it is now in Match · f0f9365f
    Alan Zimmerman authored
    One of the changes D538 introduced is to add `m_fun_id_infix` to `Match`
    data Match id body
      = Match {
            m_fun_id_infix :: (Maybe (Located id,Bool)),
              -- fun_id and fun_infix for functions with multiple equations
              -- only present for a RdrName. See note [fun_id in Match]
            m_pats :: [LPat id], -- The patterns
            m_type :: (Maybe (LHsType id)),
                                     -- A type signature for the result of the match
                                     -- Nothing after typechecking
            m_grhss :: (GRHSs id body)
      } deriving (Typeable)
    This was done to track the individual locations and fixity of the
    `fun_id` for each of the defining equations for a function when there
    are more than one.
    For example, the function `(&&&)` is defined with some prefix and some
    infix equations below.
        (&&&  ) [] [] =  []
        xs    &&&   [] =  xs
        (  &&&  ) [] ys =  ys
    This means that the fun_infix is now superfluous in the `FunBind`. This
    has not been removed as a potentially risky change just before 7.10 RC2,
    and so must be done after.
    This ticket captures that task, which includes processing these fields
    through the renamer and beyond.
    Ticket #9988 introduced these fields into `Match` through renaming, this
    ticket it to continue through type checking and then remove it from
    `FunBind` completely.
    The split happened so that #9988 could land in 7.10
    Trac ticket : #10061
    Test Plan: ./validate
    Reviewers: goldfire, austin, simonpj, bgamari
    Reviewed By: bgamari
    Subscribers: simonpj, thomie, mpickering
    Differential Revision: https://phabricator.haskell.org/D1285
    GHC Trac Issues: #10061
TcPatSyn.hs 27.2 KB