GHC.Rename.Env

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Result of looking up an occurrence that might be an ambiguous field.

Constructors

UnambiguousGre GreName	Occurrence picked out a single name, which may or may not belong to a field (or might be unbound, if an error has been reported already, per Note [ Unbound vs Ambiguous Names ]).
AmbiguousFields	Occurrence picked out two or more fields, and no non-fields. For now this is allowed by DuplicateRecordFields in certain circumstances, as the type-checker may be able to disambiguate later.

lookupExprOccRn :: RdrName -> RnM (Maybe GreName) Source #

Look up a RdrName used as a variable in an expression.

This may be a local variable, global variable, or one or more record selector functions. It will not return record fields created with the NoFieldSelectors extension (see Note [NoFieldSelectors]).

If the name is not in scope at the term level, but its promoted equivalent is in scope at the type level, the lookup will succeed (so that the type-checker can report a more informative error later). See Note [Promotion].

lookupRecFieldOcc :: Maybe Name -> RdrName -> RnM Name Source #

Look up an occurrence of a field in record construction or pattern matching (but not update). When the -XDisambiguateRecordFields flag is on, take account of the data constructor name to disambiguate which field to use.

See Note [DisambiguateRecordFields] and Note [NoFieldSelectors].

lookupRecFieldOcc_update :: DuplicateRecordFields -> RdrName -> RnM AmbiguousResult Source #

Look up an occurrence of a field in a record update, returning the selector name.

Unlike construction and pattern matching with -XDisambiguateRecordFields (see lookupRecFieldOcc), there is no data constructor to help disambiguate, so this may be ambiguous if the field is in scope multiple times. However we ignore non-fields in scope with the same name if -XDisambiguateRecordFields is on (see Note [DisambiguateRecordFields for updates]).

Here a field is in scope even if NoFieldSelectors was enabled at its definition site (see Note [NoFieldSelectors]).

data ChildLookupResult Source #

Constructors

NameNotFound
IncorrectParent Name GreName [Name]
FoundChild Parent GreName

Instances

Instances details

Outputable ChildLookupResult Source #
Instance details Defined in GHC.Rename.Env Methods ppr :: ChildLookupResult -> SDoc Source #

lookupSubBndrOcc_helper :: Bool -> Bool -> Name -> RdrName -> RnM ChildLookupResult Source #

Used in export lists to lookup the children.

combineChildLookupResult :: [RnM ChildLookupResult] -> RnM ChildLookupResult Source #

Specialised version of msum for RnM ChildLookupResult

data HsSigCtxt Source #

Constructors

TopSigCtxt NameSet
LocalBindCtxt NameSet
ClsDeclCtxt Name
InstDeclCtxt NameSet
HsBootCtxt NameSet
RoleAnnotCtxt NameSet

Instances

Instances details

Outputable HsSigCtxt Source #
Instance details Defined in GHC.Rename.Env Methods ppr :: HsSigCtxt -> SDoc Source #

lookupLocalTcNames :: HsSigCtxt -> SDoc -> RdrName -> RnM [(RdrName, Name)] Source #

lookupSigOccRn :: HsSigCtxt -> Sig GhcPs -> LocatedA RdrName -> RnM (LocatedA Name) Source #

lookupSigOccRnN :: HsSigCtxt -> Sig GhcPs -> LocatedN RdrName -> RnM (LocatedN Name) Source #

lookupSigCtxtOccRn Source #

Arguments

:: HsSigCtxt
-> SDoc	description of thing we're looking up, like "type family"
-> LocatedA RdrName
-> RnM (LocatedA Name)

Lookup a name in relation to the names in a HsSigCtxt

lookupSigCtxtOccRnN Source #

Arguments

:: HsSigCtxt
-> SDoc	description of thing we're looking up, like "type family"
-> LocatedN RdrName
-> RnM (LocatedN Name)

Lookup a name in relation to the names in a HsSigCtxt

lookupInstDeclBndr :: Name -> SDoc -> RdrName -> RnM Name Source #

lookupFamInstName :: Maybe Name -> LocatedN RdrName -> RnM (LocatedN Name) Source #

lookupConstructorFields :: Name -> RnM [FieldLabel] Source #

lookupGreAvailRn :: RdrName -> RnM (Name, AvailInfo) Source #

lookupSyntax :: Name -> RnM (SyntaxExpr GhcRn, FreeVars) Source #

lookupSyntaxExpr Source #

Arguments

:: Name	The standard name
-> RnM (HsExpr GhcRn, FreeVars)	Possibly a non-standard name

lookupSyntaxNames :: [Name] -> RnM ([HsExpr GhcRn], FreeVars) Source #

lookupSyntaxName Source #

Arguments

:: Name

The standard name

-> RnM (Name, FreeVars)

Possibly a non-standard name Lookup a Name that may be subject to Rebindable Syntax (RS).

When RS is off, just return the supplied (standard) Name
When RS is on, look up the OccName of the supplied Name; return what we find, or the supplied Name if there is nothing in scope

lookupIfThenElse :: RnM (Maybe Name) Source #

lookupQualifiedDoExpr :: HsStmtContext p -> Name -> RnM (HsExpr GhcRn, FreeVars) Source #

lookupQualifiedDo :: HsStmtContext p -> Name -> RnM (SyntaxExpr GhcRn, FreeVars) Source #

lookupQualifiedDoName :: HsStmtContext p -> Name -> RnM (Name, FreeVars) Source #

lookupNameWithQualifier :: Name -> ModuleName -> RnM (Name, FreeVars) Source #

addUsedGRE :: Bool -> GlobalRdrElt -> RnM () Source #

addUsedGREs :: [GlobalRdrElt] -> RnM () Source #

addUsedDataCons :: GlobalRdrEnv -> TyCon -> RnM () Source #

dataTcOccs :: RdrName -> [RdrName] Source #