{-# LANGUAGE GADTs #-}
{-# 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 ()
import GHC.Tc.Errors.Ppr ()
import GHC.Types.Error
import GHC.Unit.Types
import GHC.Utils.Outputable
import GHC.Unit.Module
import GHC.Unit.State
import GHC.Types.Hint
import GHC.Types.SrcLoc
import Data.Version

import Language.Haskell.Syntax.Decls (RuleDecl(..))

--
-- Suggestions
--

-- | Suggests a list of 'InstantiationSuggestion' for the '.hsig' file to the user.
suggestInstantiatedWith :: ModuleName -> GenInstantiations UnitId -> [InstantiationSuggestion]
suggestInstantiatedWith :: ModuleName -> GenInstantiations UnitId -> [InstantiationSuggestion]
suggestInstantiatedWith ModuleName
pi_mod_name GenInstantiations UnitId
insts =
  [ ModuleName -> Module -> InstantiationSuggestion
InstantiationSuggestion ModuleName
k Module
v | (ModuleName
k,Module
v) <- ((ModuleName
pi_mod_name, ModuleName -> Module
forall u. ModuleName -> GenModule (GenUnit u)
mkHoleModule ModuleName
pi_mod_name) (ModuleName, Module)
-> GenInstantiations UnitId -> GenInstantiations UnitId
forall a. a -> [a] -> [a]
: GenInstantiations UnitId
insts) ]


instance Diagnostic GhcMessage where
  diagnosticMessage :: GhcMessage -> DecoratedSDoc
diagnosticMessage = \case
    GhcPsMessage PsMessage
m
      -> PsMessage -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage PsMessage
m
    GhcTcRnMessage TcRnMessage
m
      -> TcRnMessage -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage TcRnMessage
m
    GhcDsMessage DsMessage
m
      -> DsMessage -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage DsMessage
m
    GhcDriverMessage DriverMessage
m
      -> DriverMessage -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage DriverMessage
m
    GhcUnknownMessage a
m
      -> a -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage a
m

  diagnosticReason :: GhcMessage -> DiagnosticReason
diagnosticReason = \case
    GhcPsMessage PsMessage
m
      -> PsMessage -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason PsMessage
m
    GhcTcRnMessage TcRnMessage
m
      -> TcRnMessage -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason TcRnMessage
m
    GhcDsMessage DsMessage
m
      -> DsMessage -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason DsMessage
m
    GhcDriverMessage DriverMessage
m
      -> DriverMessage -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason DriverMessage
m
    GhcUnknownMessage a
m
      -> a -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason a
m

  diagnosticHints :: GhcMessage -> [GhcHint]
diagnosticHints = \case
    GhcPsMessage PsMessage
m
      -> PsMessage -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints PsMessage
m
    GhcTcRnMessage TcRnMessage
m
      -> TcRnMessage -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints TcRnMessage
m
    GhcDsMessage DsMessage
m
      -> DsMessage -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints DsMessage
m
    GhcDriverMessage DriverMessage
m
      -> DriverMessage -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints DriverMessage
m
    GhcUnknownMessage a
m
      -> a -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints a
m

instance Diagnostic DriverMessage where
  diagnosticMessage :: DriverMessage -> DecoratedSDoc
diagnosticMessage = \case
    DriverUnknownMessage a
m
      -> a -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage a
m
    DriverPsHeaderMessage PsMessage
m
      -> PsMessage -> DecoratedSDoc
forall a. Diagnostic a => a -> DecoratedSDoc
diagnosticMessage PsMessage
m
    DriverMissingHomeModules [ModuleName]
missing BuildingCabalPackage
buildingCabalPackage
      -> let msg :: SDoc
msg | BuildingCabalPackage
buildingCabalPackage BuildingCabalPackage -> BuildingCabalPackage -> Bool
forall a. Eq a => a -> a -> Bool
== BuildingCabalPackage
YesBuildingCabalPackage
                 = SDoc -> Int -> SDoc -> SDoc
hang
                     (String -> SDoc
text String
"These modules are needed for compilation but not listed in your .cabal file's other-modules: ")
                     Int
4
                     ([SDoc] -> SDoc
sep ((ModuleName -> SDoc) -> [ModuleName] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ModuleName]
missing))
                 | Bool
otherwise
                 =
                   SDoc -> Int -> SDoc -> SDoc
hang
                     (String -> SDoc
text String
"Modules are not listed in command line but needed for compilation: ")
                     Int
4
                     ([SDoc] -> SDoc
sep ((ModuleName -> SDoc) -> [ModuleName] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ModuleName]
missing))
         in SDoc -> DecoratedSDoc
mkSimpleDecorated SDoc
msg
    DriverUnknownHiddenModules [ModuleName]
missing
      -> let msg :: SDoc
msg = SDoc -> Int -> SDoc -> SDoc
hang
                     (String -> SDoc
text String
"Modules are listened as hidden but not part of the unit: ")
                     Int
4
                     ([SDoc] -> SDoc
sep ((ModuleName -> SDoc) -> [ModuleName] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ModuleName]
missing))
         in SDoc -> DecoratedSDoc
mkSimpleDecorated SDoc
msg
    DriverUnknownReexportedModules [ModuleName]
missing
      -> let msg :: SDoc
msg = SDoc -> Int -> SDoc -> SDoc
hang
                     (String -> SDoc
text String
"Modules are listened as reexported but can't be found in any dependency: ")
                     Int
4
                     ([SDoc] -> SDoc
sep ((ModuleName -> SDoc) -> [ModuleName] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr [ModuleName]
missing))
         in SDoc -> DecoratedSDoc
mkSimpleDecorated SDoc
msg
    DriverUnusedPackages [(UnitId, PackageName, Version, PackageArg)]
unusedArgs
      -> let msg :: SDoc
msg = [SDoc] -> SDoc
vcat [ String -> SDoc
text String
"The following packages were specified" SDoc -> SDoc -> SDoc
<+>
                          String -> SDoc
text String
"via -package or -package-id flags,"
                        , String -> SDoc
text String
"but were not needed for compilation:"
                        , Int -> SDoc -> SDoc
nest Int
2 ([SDoc] -> SDoc
vcat (((UnitId, PackageName, Version, PackageArg) -> SDoc)
-> [(UnitId, PackageName, Version, PackageArg)] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (SDoc -> SDoc
withDash (SDoc -> SDoc)
-> ((UnitId, PackageName, Version, PackageArg) -> SDoc)
-> (UnitId, PackageName, Version, PackageArg)
-> SDoc
forall b c a. (b -> c) -> (a -> b) -> a -> c
. (UnitId, PackageName, Version, PackageArg) -> SDoc
forall a a. Outputable a => (a, a, Version, PackageArg) -> SDoc
displayOneUnused) [(UnitId, PackageName, Version, PackageArg)]
unusedArgs))
                        ]
         in SDoc -> DecoratedSDoc
mkSimpleDecorated SDoc
msg
         where
            withDash :: SDoc -> SDoc
            withDash :: SDoc -> SDoc
withDash = SDoc -> SDoc -> SDoc
(<+>) (String -> SDoc
text String
"-")

            displayOneUnused :: (a, a, Version, PackageArg) -> SDoc
displayOneUnused (a
_uid, a
pn , Version
v, PackageArg
f) =
              a -> SDoc
forall a. Outputable a => a -> SDoc
ppr a
pn SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
"-"  SDoc -> SDoc -> SDoc
<> String -> SDoc
text (Version -> String
showVersion Version
v)
                     SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
parens (PackageArg -> SDoc
suffix PackageArg
f)

            suffix :: PackageArg -> SDoc
suffix PackageArg
f = String -> SDoc
text String
"exposed by flag" SDoc -> SDoc -> SDoc
<+> PackageArg -> SDoc
pprUnusedArg PackageArg
f

            pprUnusedArg :: PackageArg -> SDoc
            pprUnusedArg :: PackageArg -> SDoc
pprUnusedArg (PackageArg String
str) = String -> SDoc
text String
"-package" SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
str
            pprUnusedArg (UnitIdArg Unit
uid) = String -> SDoc
text String
"-package-id" SDoc -> SDoc -> SDoc
<+> Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr Unit
uid

    DriverUnnecessarySourceImports ModuleName
mod
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (String -> SDoc
text String
"{-# SOURCE #-} unnecessary in import of " SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
mod))
    DriverDuplicatedModuleDeclaration Module
mod [String]
files
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           String -> SDoc
text String
"module" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr Module
mod) SDoc -> SDoc -> SDoc
<+>
           String -> SDoc
text String
"is defined in multiple files:" SDoc -> SDoc -> SDoc
<+>
           [SDoc] -> SDoc
sep ((String -> SDoc) -> [String] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map String -> SDoc
text [String]
files)
    DriverModuleNotFound ModuleName
mod
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (String -> SDoc
text String
"module" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
mod) SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"cannot be found locally")
    DriverFileModuleNameMismatch ModuleName
actual ModuleName
expected
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           String -> SDoc
text String
"File name does not match module name:"
           SDoc -> SDoc -> SDoc
$$ String -> SDoc
text String
"Saw     :" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
actual)
           SDoc -> SDoc -> SDoc
$$ String -> SDoc
text String
"Expected:" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
expected)

    DriverUnexpectedSignature ModuleName
pi_mod_name BuildingCabalPackage
_buildingCabalPackage GenInstantiations UnitId
_instantiations
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$ String -> SDoc
text String
"Unexpected signature:" SDoc -> SDoc -> SDoc
<+> SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
pi_mod_name)
    DriverFileNotFound String
hsFilePath
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (String -> SDoc
text String
"Can't find" SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
hsFilePath)
    DriverMessage
DriverStaticPointersNotSupported
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (String -> SDoc
text String
"StaticPointers is not supported in GHCi interactive expressions.")
    DriverBackpackModuleNotFound ModuleName
modname
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (String -> SDoc
text String
"module" SDoc -> SDoc -> SDoc
<+> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
modname SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"was not found")
    DriverUserDefinedRuleIgnored (HsRule { rd_name :: forall pass. RuleDecl pass -> XRec pass (SourceText, RuleName)
rd_name = XRec GhcTc (SourceText, RuleName)
n })
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
            String -> SDoc
text String
"Rule \"" SDoc -> SDoc -> SDoc
<> RuleName -> SDoc
ftext ((SourceText, RuleName) -> RuleName
forall a b. (a, b) -> b
snd ((SourceText, RuleName) -> RuleName)
-> (SourceText, RuleName) -> RuleName
forall a b. (a -> b) -> a -> b
$ GenLocated (SrcAnn NoEpAnns) (SourceText, RuleName)
-> (SourceText, RuleName)
forall l e. GenLocated l e -> e
unLoc GenLocated (SrcAnn NoEpAnns) (SourceText, RuleName)
XRec GhcTc (SourceText, RuleName)
n) SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
"\" ignored" SDoc -> SDoc -> SDoc
$+$
            String -> SDoc
text String
"Defining user rules is disabled under Safe Haskell"
    DriverMixedSafetyImport ModuleName
modName
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           String -> SDoc
text String
"Module" SDoc -> SDoc -> SDoc
<+> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
modName SDoc -> SDoc -> SDoc
<+> String -> SDoc
text (String
"is imported both as a safe and unsafe import!")
    DriverCannotLoadInterfaceFile Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           String -> SDoc
text String
"Can't load the interface file for" SDoc -> SDoc -> SDoc
<+> Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr Module
m
           SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
", to check that it can be safely imported"
    DriverInferredSafeModule Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (ModuleName -> SDoc) -> ModuleName -> SDoc
forall a b. (a -> b) -> a -> b
$ Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m) SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"has been inferred as safe!"
    DriverInferredSafeImport Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           [SDoc] -> SDoc
sep
             [ String -> SDoc
text String
"Importing Safe-Inferred module "
                 SDoc -> SDoc -> SDoc
<> ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m)
                 SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
" from explicitly Safe module"
             ]
    DriverMarkedTrustworthyButInferredSafe Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (ModuleName -> SDoc) -> ModuleName -> SDoc
forall a b. (a -> b) -> a -> b
$ Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m) SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"is marked as Trustworthy but has been inferred as safe!"
    DriverCannotImportUnsafeModule Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           [SDoc] -> SDoc
sep [ ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m)
                   SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
": Can't be safely imported!"
               , String -> SDoc
text String
"The module itself isn't safe." ]
    DriverMissingSafeHaskellMode Module
modName
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           Module -> SDoc
forall a. Outputable a => a -> SDoc
ppr Module
modName SDoc -> SDoc -> SDoc
<+> String -> SDoc
text String
"is missing Safe Haskell mode"
    DriverPackageNotTrusted UnitState
state UnitId
pkg
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           UnitState -> SDoc -> SDoc
pprWithUnitState UnitState
state
             (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$ String -> SDoc
text String
"The package ("
                SDoc -> SDoc -> SDoc
<> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
pkg
                SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
") is required to be trusted but it isn't!"
    DriverCannotImportFromUntrustedPackage UnitState
state Module
m
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$
           [SDoc] -> SDoc
sep [ ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> ModuleName
forall unit. GenModule unit -> ModuleName
moduleName Module
m)
                   SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
": Can't be safely imported!"
               , String -> SDoc
text String
"The package ("
                   SDoc -> SDoc -> SDoc
<> (UnitState -> SDoc -> SDoc
pprWithUnitState UnitState
state (SDoc -> SDoc) -> SDoc -> SDoc
forall a b. (a -> b) -> a -> b
$ Unit -> SDoc
forall a. Outputable a => a -> SDoc
ppr (Module -> Unit
forall unit. GenModule unit -> unit
moduleUnit Module
m))
                   SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
") the module resides in isn't trusted."
               ]
    DriverRedirectedNoMain ModuleName
mod_name
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$ (String -> SDoc
text
                       (String
"Output was redirected with -o, " String -> String -> String
forall a. [a] -> [a] -> [a]
++
                       String
"but no output will be generated.") SDoc -> SDoc -> SDoc
$$
                       (String -> SDoc
text String
"There is no module named" SDoc -> SDoc -> SDoc
<+>
                       SDoc -> SDoc
quotes (ModuleName -> SDoc
forall a. Outputable a => a -> SDoc
ppr ModuleName
mod_name) SDoc -> SDoc -> SDoc
<> String -> SDoc
text String
"."))
    DriverHomePackagesNotClosed [UnitId]
needed_unit_ids
      -> SDoc -> DecoratedSDoc
mkSimpleDecorated (SDoc -> DecoratedSDoc) -> SDoc -> DecoratedSDoc
forall a b. (a -> b) -> a -> b
$ [SDoc] -> SDoc
vcat ([String -> SDoc
text String
"Home units are not closed."
                                  , String -> SDoc
text String
"It is necessary to also load the following units:" ]
                                  [SDoc] -> [SDoc] -> [SDoc]
forall a. [a] -> [a] -> [a]
++ (UnitId -> SDoc) -> [UnitId] -> [SDoc]
forall a b. (a -> b) -> [a] -> [b]
map (\UnitId
uid -> String -> SDoc
text String
"-" SDoc -> SDoc -> SDoc
<+> UnitId -> SDoc
forall a. Outputable a => a -> SDoc
ppr UnitId
uid) [UnitId]
needed_unit_ids)

  diagnosticReason :: DriverMessage -> DiagnosticReason
diagnosticReason = \case
    DriverUnknownMessage a
m
      -> a -> DiagnosticReason
forall a. Diagnostic a => a -> DiagnosticReason
diagnosticReason a
m
    DriverPsHeaderMessage {}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverMissingHomeModules{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnMissingHomeModules
    DriverUnknownHiddenModules {}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverUnknownReexportedModules {}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverUnusedPackages{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnUnusedPackages
    DriverUnnecessarySourceImports{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnUnusedImports
    DriverDuplicatedModuleDeclaration{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverModuleNotFound{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverFileModuleNameMismatch{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverUnexpectedSignature{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverFileNotFound{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverMessage
DriverStaticPointersNotSupported
      -> DiagnosticReason
WarningWithoutFlag
    DriverBackpackModuleNotFound{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverUserDefinedRuleIgnored{}
      -> DiagnosticReason
WarningWithoutFlag
    DriverMixedSafetyImport{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverCannotLoadInterfaceFile{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverInferredSafeModule{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnSafe
    DriverMarkedTrustworthyButInferredSafe{}
      ->WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnTrustworthySafe
    DriverInferredSafeImport{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnInferredSafeImports
    DriverCannotImportUnsafeModule{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverMissingSafeHaskellMode{}
      -> WarningFlag -> DiagnosticReason
WarningWithFlag WarningFlag
Opt_WarnMissingSafeHaskellMode
    DriverPackageNotTrusted{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverCannotImportFromUntrustedPackage{}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverRedirectedNoMain {}
      -> DiagnosticReason
ErrorWithoutFlag
    DriverHomePackagesNotClosed {}
      -> DiagnosticReason
ErrorWithoutFlag

  diagnosticHints :: DriverMessage -> [GhcHint]
diagnosticHints = \case
    DriverUnknownMessage a
m
      -> a -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints a
m
    DriverPsHeaderMessage PsMessage
psMsg
      -> PsMessage -> [GhcHint]
forall a. Diagnostic a => a -> [GhcHint]
diagnosticHints PsMessage
psMsg
    DriverMissingHomeModules{}
      -> [GhcHint]
noHints
    DriverUnknownHiddenModules {}
      -> [GhcHint]
noHints
    DriverUnknownReexportedModules {}
      -> [GhcHint]
noHints
    DriverUnusedPackages{}
      -> [GhcHint]
noHints
    DriverUnnecessarySourceImports{}
      -> [GhcHint]
noHints
    DriverDuplicatedModuleDeclaration{}
      -> [GhcHint]
noHints
    DriverModuleNotFound{}
      -> [GhcHint]
noHints
    DriverFileModuleNameMismatch{}
      -> [GhcHint]
noHints
    DriverUnexpectedSignature ModuleName
pi_mod_name BuildingCabalPackage
buildingCabalPackage GenInstantiations UnitId
instantiations
      -> if BuildingCabalPackage
buildingCabalPackage BuildingCabalPackage -> BuildingCabalPackage -> Bool
forall a. Eq a => a -> a -> Bool
== BuildingCabalPackage
YesBuildingCabalPackage
           then [ModuleName -> GhcHint
SuggestAddSignatureCabalFile ModuleName
pi_mod_name]
           else [ModuleName -> [InstantiationSuggestion] -> GhcHint
SuggestSignatureInstantiations ModuleName
pi_mod_name (ModuleName -> GenInstantiations UnitId -> [InstantiationSuggestion]
suggestInstantiatedWith ModuleName
pi_mod_name GenInstantiations UnitId
instantiations)]
    DriverFileNotFound{}
      -> [GhcHint]
noHints
    DriverMessage
DriverStaticPointersNotSupported
      -> [GhcHint]
noHints
    DriverBackpackModuleNotFound{}
      -> [GhcHint]
noHints
    DriverUserDefinedRuleIgnored{}
      -> [GhcHint]
noHints
    DriverMixedSafetyImport{}
      -> [GhcHint]
noHints
    DriverCannotLoadInterfaceFile{}
      -> [GhcHint]
noHints
    DriverInferredSafeModule{}
      -> [GhcHint]
noHints
    DriverInferredSafeImport{}
      -> [GhcHint]
noHints
    DriverCannotImportUnsafeModule{}
      -> [GhcHint]
noHints
    DriverMissingSafeHaskellMode{}
      -> [GhcHint]
noHints
    DriverPackageNotTrusted{}
      -> [GhcHint]
noHints
    DriverMarkedTrustworthyButInferredSafe{}
      -> [GhcHint]
noHints
    DriverCannotImportFromUntrustedPackage{}
      -> [GhcHint]
noHints
    DriverRedirectedNoMain {}
      -> [GhcHint]
noHints
    DriverHomePackagesNotClosed {}
      -> [GhcHint]
noHints