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{-# LANGUAGE LambdaCase #-}
{-# OPTIONS_GHC -fno-warn-orphans #-} -- instance Diagnostic {DriverMessage, GhcMessage}
module GHC.Driver.Errors.Ppr where
import GHC.Prelude
import GHC.Driver.Errors.Types
import GHC.Driver.Flags
import GHC.Driver.Session
import GHC.HsToCore.Errors.Ppr ()
import GHC.Parser.Errors.Ppr (pprPsError)
import GHC.Tc.Errors.Ppr ()
import GHC.Types.Error
import GHC.Unit.Types
import GHC.Utils.Outputable
import GHC.Unit.Module
--
-- Suggestions
--
-- | Suggests a list of 'InstantiationSuggestion' for the '.hsig' file to the user.
suggestInstantiatedWith :: ModuleName -> GenInstantiations UnitId -> [InstantiationSuggestion]
suggestInstantiatedWith pi_mod_name insts =
[ InstantiationSuggestion k v | (k,v) <- ((pi_mod_name, mkHoleModule pi_mod_name) : insts) ]
instance Diagnostic GhcMessage where
diagnosticMessage = \case
GhcPsMessage m
-> diagnosticMessage m
GhcTcRnMessage m
-> diagnosticMessage m
GhcDsMessage m
-> diagnosticMessage m
GhcDriverMessage m
-> diagnosticMessage m
GhcUnknownMessage m
-> diagnosticMessage m
diagnosticReason = \case
GhcPsMessage m
-> diagnosticReason m
GhcTcRnMessage m
-> diagnosticReason m
GhcDsMessage m
-> diagnosticReason m
GhcDriverMessage m
-> diagnosticReason m
GhcUnknownMessage m
-> diagnosticReason m
instance Diagnostic DriverMessage where
diagnosticMessage = \case
DriverUnknownMessage m
-> diagnosticMessage m
DriverPsHeaderMessage desc hints
-> mkSimpleDecorated $ pprPsError desc hints
DriverMissingHomeModules missing buildingCabalPackage
-> let msg | buildingCabalPackage == YesBuildingCabalPackage
= hang
(text "These modules are needed for compilation but not listed in your .cabal file's other-modules: ")
4
(sep (map ppr missing))
| otherwise
=
hang
(text "Modules are not listed in command line but needed for compilation: ")
4
(sep (map ppr missing))
in mkSimpleDecorated msg
DriverUnusedPackages unusedArgs
-> let msg = vcat [ text "The following packages were specified" <+>
text "via -package or -package-id flags,"
, text "but were not needed for compilation:"
, nest 2 (vcat (map (withDash . pprUnusedArg) unusedArgs))
]
in mkSimpleDecorated msg
where
withDash :: SDoc -> SDoc
withDash = (<+>) (text "-")
pprUnusedArg :: PackageArg -> SDoc
pprUnusedArg (PackageArg str) = text str
pprUnusedArg (UnitIdArg uid) = ppr uid
DriverUnnecessarySourceImports mod
-> mkSimpleDecorated (text "{-# SOURCE #-} unnecessary in import of " <+> quotes (ppr mod))
DriverDuplicatedModuleDeclaration mod files
-> mkSimpleDecorated $
text "module" <+> quotes (ppr mod) <+>
text "is defined in multiple files:" <+>
sep (map text files)
DriverModuleNotFound mod
-> mkSimpleDecorated (text "module" <+> quotes (ppr mod) <+> text "cannot be found locally")
DriverFileModuleNameMismatch actual expected
-> mkSimpleDecorated $
text "File name does not match module name:"
$$ text "Saw :" <+> quotes (ppr actual)
$$ text "Expected:" <+> quotes (ppr expected)
DriverUnexpectedSignature pi_mod_name buildingCabalPackage suggestions
-> let suggested_instantiated_with =
hcat (punctuate comma $
[ ppr k <> text "=" <> ppr v
| InstantiationSuggestion k v <- suggestions
])
msg = text "Unexpected signature:" <+> quotes (ppr pi_mod_name)
$$ if buildingCabalPackage == YesBuildingCabalPackage
then parens (text "Try adding" <+> quotes (ppr pi_mod_name)
<+> text "to the"
<+> quotes (text "signatures")
<+> text "field in your Cabal file.")
else parens (text "Try passing -instantiated-with=\"" <>
suggested_instantiated_with <> text "\"" $$
text "replacing <" <> ppr pi_mod_name <> text "> as necessary.")
in mkSimpleDecorated msg
DriverFileNotFound hsFilePath
-> mkSimpleDecorated (text "Can't find" <+> text hsFilePath)
DriverStaticPointersNotSupported
-> mkSimpleDecorated (text "StaticPointers is not supported in GHCi interactive expressions.")
DriverBackpackModuleNotFound modname
-> mkSimpleDecorated (text "module" <+> ppr modname <+> text "was not found")
diagnosticReason = \case
DriverUnknownMessage m
-> diagnosticReason m
DriverPsHeaderMessage {}
-> ErrorWithoutFlag
DriverMissingHomeModules{}
-> WarningWithFlag Opt_WarnMissingHomeModules
DriverUnusedPackages{}
-> WarningWithFlag Opt_WarnUnusedPackages
DriverUnnecessarySourceImports{}
-> WarningWithFlag Opt_WarnUnusedImports
DriverDuplicatedModuleDeclaration{}
-> ErrorWithoutFlag
DriverModuleNotFound{}
-> ErrorWithoutFlag
DriverFileModuleNameMismatch{}
-> ErrorWithoutFlag
DriverUnexpectedSignature{}
-> ErrorWithoutFlag
DriverFileNotFound{}
-> ErrorWithoutFlag
DriverStaticPointersNotSupported
-> WarningWithoutFlag
DriverBackpackModuleNotFound{}
-> ErrorWithoutFlag
|
