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-rw-r--r--compiler/GHC/Hs/Pat.hs11
1 files changed, 5 insertions, 6 deletions
diff --git a/compiler/GHC/Hs/Pat.hs b/compiler/GHC/Hs/Pat.hs
index a98070c6a7..43f161f9bd 100644
--- a/compiler/GHC/Hs/Pat.hs
+++ b/compiler/GHC/Hs/Pat.hs
@@ -82,7 +82,6 @@ import GHC.Types.Name (Name)
import GHC.Driver.Session
import qualified GHC.LanguageExtensions as LangExt
import Data.Data
-import Data.Void
type instance XWildPat GhcPs = NoExtField
@@ -139,7 +138,7 @@ type instance XViewPat GhcTc = Type
type instance XSplicePat GhcPs = NoExtField
type instance XSplicePat GhcRn = NoExtField
-type instance XSplicePat GhcTc = Void -- See Note [Constructor cannot occur]
+type instance XSplicePat GhcTc = DataConCantHappen
type instance XLitPat (GhcPass _) = NoExtField
@@ -155,7 +154,7 @@ type instance XSigPat GhcPs = EpAnn [AddEpAnn]
type instance XSigPat GhcRn = NoExtField
type instance XSigPat GhcTc = Type
-type instance XXPat GhcPs = NoExtCon
+type instance XXPat GhcPs = DataConCantHappen
type instance XXPat GhcRn = HsPatExpansion (Pat GhcRn) (Pat GhcRn)
-- Original pattern and its desugaring/expansion.
-- See Note [Rebindable syntax and HsExpansion].
@@ -356,7 +355,7 @@ pprPat (ConPat { pat_con = con
pprPat (XPat ext) = case ghcPass @p of
#if __GLASGOW_HASKELL__ < 811
- GhcPs -> noExtCon ext
+ GhcPs -> dataConCantHappen ext
#endif
GhcRn -> case ext of
HsPatExpanded orig _ -> pprPat orig
@@ -567,7 +566,7 @@ isIrrefutableHsPat' is_strict = goL
go (XPat ext) = case ghcPass @p of
#if __GLASGOW_HASKELL__ < 811
- GhcPs -> noExtCon ext
+ GhcPs -> dataConCantHappen ext
#endif
GhcRn -> case ext of
HsPatExpanded _ pat -> go pat
@@ -630,7 +629,7 @@ patNeedsParens p = go @p
go (ViewPat {}) = True
go (XPat ext) = case ghcPass @q of
#if __GLASGOW_HASKELL__ < 901
- GhcPs -> noExtCon ext
+ GhcPs -> dataConCantHappen ext
#endif
GhcRn -> case ext of
HsPatExpanded orig _ -> go orig