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Diffstat (limited to 'compiler/GHC/Tc/Errors/Types/PromotionErr.hs')
| -rw-r--r-- | compiler/GHC/Tc/Errors/Types/PromotionErr.hs | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/compiler/GHC/Tc/Errors/Types/PromotionErr.hs b/compiler/GHC/Tc/Errors/Types/PromotionErr.hs new file mode 100644 index 0000000000..2de61c5aa3 --- /dev/null +++ b/compiler/GHC/Tc/Errors/Types/PromotionErr.hs @@ -0,0 +1,47 @@ +module GHC.Tc.Errors.Types.PromotionErr where + +import GHC.Prelude +import GHC.Core.Type (ThetaType) +import GHC.Utils.Outputable +import GHC.Utils.Misc + +data PromotionErr + = TyConPE -- TyCon used in a kind before we are ready + -- data T :: T -> * where ... + | ClassPE -- Ditto Class + + | FamDataConPE -- Data constructor for a data family + -- See Note [AFamDataCon: not promoting data family constructors] + -- in GHC.Tc.Utils.Env. + | ConstrainedDataConPE ThetaType -- Data constructor with a context + -- See Note [No constraints in kinds] in GHC.Tc.Validity + | PatSynPE -- Pattern synonyms + -- See Note [Don't promote pattern synonyms] in GHC.Tc.Utils.Env + + | RecDataConPE -- Data constructor in a recursive loop + -- See Note [Recursion and promoting data constructors] in GHC.Tc.TyCl + | TermVariablePE -- See Note [Promoted variables in types] + | NoDataKindsDC -- -XDataKinds not enabled (for a datacon) + +instance Outputable PromotionErr where + ppr ClassPE = text "ClassPE" + ppr TyConPE = text "TyConPE" + ppr PatSynPE = text "PatSynPE" + ppr FamDataConPE = text "FamDataConPE" + ppr (ConstrainedDataConPE theta) = text "ConstrainedDataConPE" <+> parens (ppr theta) + ppr RecDataConPE = text "RecDataConPE" + ppr NoDataKindsDC = text "NoDataKindsDC" + ppr TermVariablePE = text "TermVariablePE" + +pprPECategory :: PromotionErr -> SDoc +pprPECategory = text . capitalise . peCategory + +peCategory :: PromotionErr -> String +peCategory ClassPE = "class" +peCategory TyConPE = "type constructor" +peCategory PatSynPE = "pattern synonym" +peCategory FamDataConPE = "data constructor" +peCategory ConstrainedDataConPE{} = "data constructor" +peCategory RecDataConPE = "data constructor" +peCategory NoDataKindsDC = "data constructor" +peCategory TermVariablePE = "term variable"
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