| Safe Haskell | Safe |
|---|---|
| Language | Haskell2010 |
Language.Haskell.TH
Description
The public face of Template Haskell
For other documentation, refer to: http://www.haskell.org/haskellwiki/Template_Haskell
Synopsis
- data Q a
- runQ :: Quasi m => Q a -> m a
- reportError :: String -> Q ()
- reportWarning :: String -> Q ()
- report :: Bool -> String -> Q ()
- recover :: Q a -> Q a -> Q a
- location :: Q Loc
- data Loc = Loc {}
- runIO :: IO a -> Q a
- reify :: Name -> Q Info
- reifyModule :: Module -> Q ModuleInfo
- data Info
- data ModuleInfo = ModuleInfo [Module]
- type InstanceDec = Dec
- type ParentName = Name
- type SumAlt = Int
- type SumArity = Int
- type Arity = Int
- type Unlifted = Bool
- data Extension
- = Cpp
- | OverlappingInstances
- | UndecidableInstances
- | IncoherentInstances
- | UndecidableSuperClasses
- | MonomorphismRestriction
- | MonoPatBinds
- | MonoLocalBinds
- | RelaxedPolyRec
- | ExtendedDefaultRules
- | ForeignFunctionInterface
- | UnliftedFFITypes
- | InterruptibleFFI
- | CApiFFI
- | GHCForeignImportPrim
- | JavaScriptFFI
- | ParallelArrays
- | Arrows
- | TemplateHaskell
- | TemplateHaskellQuotes
- | QuasiQuotes
- | ImplicitParams
- | ImplicitPrelude
- | ScopedTypeVariables
- | AllowAmbiguousTypes
- | UnboxedTuples
- | UnboxedSums
- | UnliftedNewtypes
- | BangPatterns
- | TypeFamilies
- | TypeFamilyDependencies
- | TypeInType
- | OverloadedStrings
- | OverloadedLists
- | NumDecimals
- | DisambiguateRecordFields
- | RecordWildCards
- | RecordPuns
- | ViewPatterns
- | GADTs
- | GADTSyntax
- | NPlusKPatterns
- | DoAndIfThenElse
- | BlockArguments
- | RebindableSyntax
- | ConstraintKinds
- | PolyKinds
- | DataKinds
- | InstanceSigs
- | ApplicativeDo
- | StandaloneDeriving
- | DeriveDataTypeable
- | AutoDeriveTypeable
- | DeriveFunctor
- | DeriveTraversable
- | DeriveFoldable
- | DeriveGeneric
- | DefaultSignatures
- | DeriveAnyClass
- | DeriveLift
- | DerivingStrategies
- | DerivingVia
- | TypeSynonymInstances
- | FlexibleContexts
- | FlexibleInstances
- | ConstrainedClassMethods
- | MultiParamTypeClasses
- | NullaryTypeClasses
- | FunctionalDependencies
- | UnicodeSyntax
- | ExistentialQuantification
- | MagicHash
- | EmptyDataDecls
- | KindSignatures
- | RoleAnnotations
- | ParallelListComp
- | TransformListComp
- | MonadComprehensions
- | GeneralizedNewtypeDeriving
- | RecursiveDo
- | PostfixOperators
- | TupleSections
- | PatternGuards
- | LiberalTypeSynonyms
- | RankNTypes
- | ImpredicativeTypes
- | TypeOperators
- | ExplicitNamespaces
- | PackageImports
- | ExplicitForAll
- | AlternativeLayoutRule
- | AlternativeLayoutRuleTransitional
- | DatatypeContexts
- | NondecreasingIndentation
- | RelaxedLayout
- | TraditionalRecordSyntax
- | LambdaCase
- | MultiWayIf
- | BinaryLiterals
- | NegativeLiterals
- | HexFloatLiterals
- | DuplicateRecordFields
- | OverloadedLabels
- | EmptyCase
- | PatternSynonyms
- | PartialTypeSignatures
- | NamedWildCards
- | StaticPointers
- | TypeApplications
- | Strict
- | StrictData
- | MonadFailDesugaring
- | EmptyDataDeriving
- | NumericUnderscores
- | QuantifiedConstraints
- | StarIsType
- | ImportQualifiedPost
- | CUSKs
- | StandaloneKindSignatures
- extsEnabled :: Q [Extension]
- isExtEnabled :: Extension -> Q Bool
- lookupTypeName :: String -> Q (Maybe Name)
- lookupValueName :: String -> Q (Maybe Name)
- reifyFixity :: Name -> Q (Maybe Fixity)
- reifyType :: Name -> Q Type
- reifyInstances :: Name -> [Type] -> Q [InstanceDec]
- isInstance :: Name -> [Type] -> Q Bool
- reifyRoles :: Name -> Q [Role]
- reifyAnnotations :: Data a => AnnLookup -> Q [a]
- data AnnLookup
- reifyConStrictness :: Name -> Q [DecidedStrictness]
- data TExp (a :: TYPE (r :: RuntimeRep))
- unType :: TExp a -> Exp
- data Name
- data NameSpace
- mkName :: String -> Name
- newName :: String -> Q Name
- nameBase :: Name -> String
- nameModule :: Name -> Maybe String
- namePackage :: Name -> Maybe String
- nameSpace :: Name -> Maybe NameSpace
- tupleTypeName :: Int -> Name
- tupleDataName :: Int -> Name
- unboxedTupleTypeName :: Int -> Name
- unboxedTupleDataName :: Int -> Name
- unboxedSumTypeName :: SumArity -> Name
- unboxedSumDataName :: SumAlt -> SumArity -> Name
- data Dec
- = FunD Name [Clause]
- | ValD Pat Body [Dec]
- | DataD Cxt Name [TyVarBndr] (Maybe Kind) [Con] [DerivClause]
- | NewtypeD Cxt Name [TyVarBndr] (Maybe Kind) Con [DerivClause]
- | TySynD Name [TyVarBndr] Type
- | ClassD Cxt Name [TyVarBndr] [FunDep] [Dec]
- | InstanceD (Maybe Overlap) Cxt Type [Dec]
- | SigD Name Type
- | KiSigD Name Kind
- | ForeignD Foreign
- | InfixD Fixity Name
- | PragmaD Pragma
- | DataFamilyD Name [TyVarBndr] (Maybe Kind)
- | DataInstD Cxt (Maybe [TyVarBndr]) Type (Maybe Kind) [Con] [DerivClause]
- | NewtypeInstD Cxt (Maybe [TyVarBndr]) Type (Maybe Kind) Con [DerivClause]
- | TySynInstD TySynEqn
- | OpenTypeFamilyD TypeFamilyHead
- | ClosedTypeFamilyD TypeFamilyHead [TySynEqn]
- | RoleAnnotD Name [Role]
- | StandaloneDerivD (Maybe DerivStrategy) Cxt Type
- | DefaultSigD Name Type
- | PatSynD Name PatSynArgs PatSynDir Pat
- | PatSynSigD Name PatSynType
- | ImplicitParamBindD String Exp
- data Con
- data Clause = Clause [Pat] Body [Dec]
- data SourceUnpackedness
- data SourceStrictness
- data DecidedStrictness
- data Bang = Bang SourceUnpackedness SourceStrictness
- type Strict = Bang
- data Foreign
- data Callconv
- = CCall
- | StdCall
- | CApi
- | Prim
- | JavaScript
- data Safety
- = Unsafe
- | Safe
- | Interruptible
- data Pragma
- data Inline
- data RuleMatch
- data Phases
- data RuleBndr
- data AnnTarget
- data FunDep = FunDep [Name] [Name]
- data TySynEqn = TySynEqn (Maybe [TyVarBndr]) Type Type
- data TypeFamilyHead = TypeFamilyHead Name [TyVarBndr] FamilyResultSig (Maybe InjectivityAnn)
- data Fixity = Fixity Int FixityDirection
- data FixityDirection
- defaultFixity :: Fixity
- maxPrecedence :: Int
- data PatSynDir
- data PatSynArgs
- = PrefixPatSyn [Name]
- | InfixPatSyn Name Name
- | RecordPatSyn [Name]
- data Exp
- = VarE Name
- | ConE Name
- | LitE Lit
- | AppE Exp Exp
- | AppTypeE Exp Type
- | InfixE (Maybe Exp) Exp (Maybe Exp)
- | UInfixE Exp Exp Exp
- | ParensE Exp
- | LamE [Pat] Exp
- | LamCaseE [Match]
- | TupE [Maybe Exp]
- | UnboxedTupE [Maybe Exp]
- | UnboxedSumE Exp SumAlt SumArity
- | CondE Exp Exp Exp
- | MultiIfE [(Guard, Exp)]
- | LetE [Dec] Exp
- | CaseE Exp [Match]
- | DoE [Stmt]
- | MDoE [Stmt]
- | CompE [Stmt]
- | ArithSeqE Range
- | ListE [Exp]
- | SigE Exp Type
- | RecConE Name [FieldExp]
- | RecUpdE Exp [FieldExp]
- | StaticE Exp
- | UnboundVarE Name
- | LabelE String
- | ImplicitParamVarE String
- data Match = Match Pat Body [Dec]
- data Body
- data Guard
- data Stmt
- data Range
- data Lit
- data Pat
- type FieldExp = (Name, Exp)
- type FieldPat = (Name, Pat)
- data Type
- = ForallT [TyVarBndr] Cxt Type
- | ForallVisT [TyVarBndr] Type
- | AppT Type Type
- | AppKindT Type Kind
- | SigT Type Kind
- | VarT Name
- | ConT Name
- | PromotedT Name
- | InfixT Type Name Type
- | UInfixT Type Name Type
- | ParensT Type
- | TupleT Int
- | UnboxedTupleT Int
- | UnboxedSumT SumArity
- | ArrowT
- | EqualityT
- | ListT
- | PromotedTupleT Int
- | PromotedNilT
- | PromotedConsT
- | StarT
- | ConstraintT
- | LitT TyLit
- | WildCardT
- | ImplicitParamT String Type
- data TyVarBndr
- data TyLit
- type Kind = Type
- type Cxt = [Pred]
- type Pred = Type
- data Role
- data FamilyResultSig
- data InjectivityAnn = InjectivityAnn Name [Name]
- type PatSynType = Type
- module Language.Haskell.TH.Lib
- class Ppr a where
- pprint :: Ppr a => a -> String
- pprExp :: Precedence -> Exp -> Doc
- pprLit :: Precedence -> Lit -> Doc
- pprPat :: Precedence -> Pat -> Doc
- pprParendType :: Type -> Doc
The monad and its operations
Instances
Administration: errors, locations and IO
reportError :: String -> Q () Source #
Report an error to the user, but allow the current splice's computation to carry on. To abort the computation, use fail.
reportWarning :: String -> Q () Source #
Report a warning to the user, and carry on.
report :: Bool -> String -> Q () Source #
Deprecated: Use reportError or reportWarning instead
Report an error (True) or warning (False),
but carry on; use fail to stop.
Recover from errors raised by reportError or fail.
Constructors
| Loc | |
Fields
| |
Instances
| Eq Loc Source # | |
| Data Loc Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Loc -> c Loc # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Loc # dataTypeOf :: Loc -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Loc) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Loc) # gmapT :: (forall b. Data b => b -> b) -> Loc -> Loc # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Loc -> r # gmapQ :: (forall d. Data d => d -> u) -> Loc -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Loc -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Loc -> m Loc # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Loc -> m Loc # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Loc -> m Loc # | |
| Ord Loc Source # | |
| Show Loc Source # | |
| Generic Loc Source # | |
| Binary Loc Source # | |
| Ppr Loc Source # | |
| type Rep Loc Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Loc = D1 ('MetaData "Loc" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Loc" 'PrefixI 'True) ((S1 ('MetaSel ('Just "loc_filename") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String) :*: S1 ('MetaSel ('Just "loc_package") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String)) :*: (S1 ('MetaSel ('Just "loc_module") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String) :*: (S1 ('MetaSel ('Just "loc_start") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CharPos) :*: S1 ('MetaSel ('Just "loc_end") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CharPos))))) | |
The runIO function lets you run an I/O computation in the Q monad.
Take care: you are guaranteed the ordering of calls to runIO within
a single Q computation, but not about the order in which splices are run.
Note: for various murky reasons, stdout and stderr handles are not necessarily flushed when the compiler finishes running, so you should flush them yourself.
Querying the compiler
Reify
reify :: Name -> Q Info Source #
reify looks up information about the Name.
It is sometimes useful to construct the argument name using lookupTypeName or lookupValueName
to ensure that we are reifying from the right namespace. For instance, in this context:
data D = D
which D does reify (mkName "D") return information about? (Answer: D-the-type, but don't rely on it.)
To ensure we get information about D-the-value, use lookupValueName:
do Just nm <- lookupValueName "D" reify nm
and to get information about D-the-type, use lookupTypeName.
reifyModule :: Module -> Q ModuleInfo Source #
reifyModule mod looks up information about module mod. To
look up the current module, call this function with the return
value of thisModule.
Constructors
| ClassI Dec [InstanceDec] | A class, with a list of its visible instances |
| ClassOpI Name Type ParentName | A class method |
| TyConI Dec | A "plain" type constructor. "Fancier" type constructors are returned
using |
| FamilyI Dec [InstanceDec] | A type or data family, with a list of its visible instances. A closed type family is returned with 0 instances. |
| PrimTyConI Name Arity Unlifted | A "primitive" type constructor, which can't be expressed with a |
| DataConI Name Type ParentName | A data constructor |
| PatSynI Name PatSynType | A pattern synonym |
| VarI Name Type (Maybe Dec) | A "value" variable (as opposed to a type variable, see The |
| TyVarI Name Type | A type variable. The |
Instances
data ModuleInfo Source #
Obtained from reifyModule in the Q Monad.
Constructors
| ModuleInfo [Module] | Contains the import list of the module. |
Instances
type InstanceDec = Dec Source #
InstanceDec desribes a single instance of a class or type function.
It is just a Dec, but guaranteed to be one of the following:
InstanceD(with empty[)Dec]DataInstDorNewtypeInstD(with empty derived[)Name]TySynInstD
In UnboxedSumE and UnboxedSumP, the number associated with a
particular data constructor. SumAlts are one-indexed and should never
exceed the value of its corresponding SumArity. For example:
In UnboxedSumE, UnboxedSumT, and UnboxedSumP, the total number of
SumAlts. For example, (#|#) has a SumArity of 2.
In PrimTyConI, arity of the type constructor
In PrimTyConI, is the type constructor unlifted?
Language extension lookup
The language extensions known to GHC.
Note that there is an orphan Binary instance for this type supplied by
the GHC.LanguageExtensions module provided by ghc-boot. We can't provide
here as this would require adding transitive dependencies to the
template-haskell package, which must have a minimal dependency set.
Constructors
Instances
| Bounded Extension Source # | |
| Enum Extension Source # | |
Defined in GHC.LanguageExtensions.Type Methods succ :: Extension -> Extension # pred :: Extension -> Extension # fromEnum :: Extension -> Int # enumFrom :: Extension -> [Extension] # enumFromThen :: Extension -> Extension -> [Extension] # enumFromTo :: Extension -> Extension -> [Extension] # enumFromThenTo :: Extension -> Extension -> Extension -> [Extension] # | |
| Eq Extension Source # | |
| Show Extension Source # | |
| Generic Extension Source # | |
| Binary Extension Source # | |
| Outputable Extension Source # | |
| type Rep Extension Source # | |
Defined in GHC.LanguageExtensions.Type type Rep Extension = D1 ('MetaData "Extension" "GHC.LanguageExtensions.Type" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) ((((((C1 ('MetaCons "Cpp" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "OverlappingInstances" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UndecidableInstances" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "IncoherentInstances" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UndecidableSuperClasses" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "MonomorphismRestriction" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "MonoPatBinds" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: ((C1 ('MetaCons "MonoLocalBinds" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "RelaxedPolyRec" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ExtendedDefaultRules" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "ForeignFunctionInterface" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UnliftedFFITypes" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "InterruptibleFFI" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "CApiFFI" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "GHCForeignImportPrim" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "JavaScriptFFI" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ParallelArrays" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "Arrows" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TemplateHaskell" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "TemplateHaskellQuotes" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "QuasiQuotes" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "ImplicitParams" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ImplicitPrelude" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ScopedTypeVariables" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AllowAmbiguousTypes" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "UnboxedTuples" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UnboxedSums" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "UnliftedNewtypes" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "BangPatterns" 'PrefixI 'False) (U1 :: Type -> Type)))))) :+: ((((C1 ('MetaCons "TypeFamilies" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "TypeFamilyDependencies" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeInType" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "OverloadedStrings" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "OverloadedLists" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NumDecimals" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DisambiguateRecordFields" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "RecordWildCards" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "RecordPuns" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ViewPatterns" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "GADTs" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "GADTSyntax" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NPlusKPatterns" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "DoAndIfThenElse" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "BlockArguments" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "RebindableSyntax" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "ConstraintKinds" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "PolyKinds" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "DataKinds" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "InstanceSigs" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ApplicativeDo" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "StandaloneDeriving" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "DeriveDataTypeable" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AutoDeriveTypeable" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "DeriveFunctor" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DeriveTraversable" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "DeriveFoldable" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DeriveGeneric" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "DefaultSignatures" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DeriveAnyClass" 'PrefixI 'False) (U1 :: Type -> Type))))))) :+: (((((C1 ('MetaCons "DeriveLift" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "DerivingStrategies" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DerivingVia" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "TypeSynonymInstances" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "FlexibleContexts" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "FlexibleInstances" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ConstrainedClassMethods" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "MultiParamTypeClasses" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NullaryTypeClasses" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "FunctionalDependencies" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UnicodeSyntax" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "ExistentialQuantification" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "MagicHash" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "EmptyDataDecls" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "KindSignatures" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "RoleAnnotations" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "ParallelListComp" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TransformListComp" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "MonadComprehensions" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "GeneralizedNewtypeDeriving" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "RecursiveDo" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "PostfixOperators" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "TupleSections" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "PatternGuards" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "LiberalTypeSynonyms" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "RankNTypes" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "ImpredicativeTypes" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeOperators" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ExplicitNamespaces" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "PackageImports" 'PrefixI 'False) (U1 :: Type -> Type)))))) :+: ((((C1 ('MetaCons "ExplicitForAll" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "AlternativeLayoutRule" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AlternativeLayoutRuleTransitional" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "DatatypeContexts" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NondecreasingIndentation" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "RelaxedLayout" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TraditionalRecordSyntax" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "LambdaCase" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "MultiWayIf" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "BinaryLiterals" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NegativeLiterals" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "HexFloatLiterals" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DuplicateRecordFields" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "OverloadedLabels" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "EmptyCase" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "PatternSynonyms" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "PartialTypeSignatures" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NamedWildCards" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "StaticPointers" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeApplications" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "Strict" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "StrictData" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: (((C1 ('MetaCons "MonadFailDesugaring" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "EmptyDataDeriving" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NumericUnderscores" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "QuantifiedConstraints" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "StarIsType" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ImportQualifiedPost" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "CUSKs" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "StandaloneKindSignatures" 'PrefixI 'False) (U1 :: Type -> Type)))))))) | |
extsEnabled :: Q [Extension] Source #
List all enabled language extensions.
isExtEnabled :: Extension -> Q Bool Source #
Determine whether the given language extension is enabled in the Q monad.
Name lookup
lookupTypeName :: String -> Q (Maybe Name) Source #
Look up the given name in the (type namespace of the) current splice's scope. See Language.Haskell.TH.Syntax for more details.
lookupValueName :: String -> Q (Maybe Name) Source #
Look up the given name in the (value namespace of the) current splice's scope. See Language.Haskell.TH.Syntax for more details.
Fixity lookup
reifyFixity :: Name -> Q (Maybe Fixity) Source #
reifyFixity nm attempts to find a fixity declaration for nm. For
example, if the function foo has the fixity declaration infixr 7 foo, then
reifyFixity 'foo would return . If the function
Just (Fixity 7 InfixR)bar does not have a fixity declaration, then reifyFixity 'bar returns
Nothing, so you may assume bar has defaultFixity.
Type lookup
reifyType :: Name -> Q Type Source #
reifyType nm attempts to find the type or kind of nm. For example,
reifyType 'not returns Bool -> Bool, and
reifyType ''Bool returns Type.
This works even if there's no explicit signature and the type or kind is inferred.
Instance lookup
reifyInstances :: Name -> [Type] -> Q [InstanceDec] Source #
reifyInstances nm tys returns a list of visible instances of nm tys. That is,
if nm is the name of a type class, then all instances of this class at the types tys
are returned. Alternatively, if nm is the name of a data family or type family,
all instances of this family at the types tys are returned.
Note that this is a "shallow" test; the declarations returned merely have
instance heads which unify with nm tys, they need not actually be satisfiable.
reifyInstances ''Eq [contains theTupleT2 `AppT`ConT''A `AppT`ConT''B ]instance (Eq a, Eq b) => Eq (a, b)regardless of whetherAandBthemselves implementEqreifyInstances ''Show [produces every available instance ofVarT(mkName"a") ]Eq
There is one edge case: reifyInstances ''Typeable tys currently always
produces an empty list (no matter what tys are given).
isInstance :: Name -> [Type] -> Q Bool Source #
Is the list of instances returned by reifyInstances nonempty?
Roles lookup
reifyRoles :: Name -> Q [Role] Source #
reifyRoles nm returns the list of roles associated with the parameters of
the tycon nm. Fails if nm cannot be found or is not a tycon.
The returned list should never contain InferR.
Annotation lookup
reifyAnnotations :: Data a => AnnLookup -> Q [a] Source #
reifyAnnotations target returns the list of annotations
associated with target. Only the annotations that are
appropriately typed is returned. So if you have Int and String
annotations for the same target, you have to call this function twice.
Annotation target for reifyAnnotations
Constructors
| AnnLookupModule Module | |
| AnnLookupName Name |
Instances
| Eq AnnLookup Source # | |
| Data AnnLookup Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> AnnLookup -> c AnnLookup # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c AnnLookup # toConstr :: AnnLookup -> Constr # dataTypeOf :: AnnLookup -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c AnnLookup) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c AnnLookup) # gmapT :: (forall b. Data b => b -> b) -> AnnLookup -> AnnLookup # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> AnnLookup -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> AnnLookup -> r # gmapQ :: (forall d. Data d => d -> u) -> AnnLookup -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> AnnLookup -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> AnnLookup -> m AnnLookup # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> AnnLookup -> m AnnLookup # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> AnnLookup -> m AnnLookup # | |
| Ord AnnLookup Source # | |
| Show AnnLookup Source # | |
| Generic AnnLookup Source # | |
| Binary AnnLookup Source # | |
| type Rep AnnLookup Source # | |
Defined in Language.Haskell.TH.Syntax type Rep AnnLookup = D1 ('MetaData "AnnLookup" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "AnnLookupModule" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Module)) :+: C1 ('MetaCons "AnnLookupName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name))) | |
Constructor strictness lookup
reifyConStrictness :: Name -> Q [DecidedStrictness] Source #
reifyConStrictness nm looks up the strictness information for the fields
of the constructor with the name nm. Note that the strictness information
that reifyConStrictness returns may not correspond to what is written in
the source code. For example, in the following data declaration:
data Pair a = Pair a a
reifyConStrictness would return [ under most
circumstances, but it would return DecidedLazy, DecidedLazy][ if the
DecidedStrict, DecidedStrict]-XStrictData language extension was enabled.
Typed expressions
data TExp (a :: TYPE (r :: RuntimeRep)) Source #
Represents an expression which has type a. Built on top of Exp, typed
expressions allow for type-safe splicing via:
- typed quotes, written as
[|| ... ||]where...is an expression; if that expression has typea, then the quotation has typeQ(TExpa) - typed splices inside of typed quotes, written as
$$(...)where...is an arbitrary expression of typeQ(TExpa)
Traditional expression quotes and splices let us construct ill-typed expressions:
>>>fmap ppr $ runQ [| True == $( [| "foo" |] ) |]GHC.Types.True GHC.Classes.== "foo">>>GHC.Types.True GHC.Classes.== "foo"<interactive> error: • Couldn't match expected type ‘Bool’ with actual type ‘[Char]’ • In the second argument of ‘(==)’, namely ‘"foo"’ In the expression: True == "foo" In an equation for ‘it’: it = True == "foo"
With typed expressions, the type error occurs when constructing the Template Haskell expression:
>>>fmap ppr $ runQ [|| True == $$( [|| "foo" ||] ) ||]<interactive> error: • Couldn't match type ‘[Char]’ with ‘Bool’ Expected type: Q (TExp Bool) Actual type: Q (TExp [Char]) • In the Template Haskell quotation [|| "foo" ||] In the expression: [|| "foo" ||] In the Template Haskell splice $$([|| "foo" ||])
Names
An abstract type representing names in the syntax tree.
Names can be constructed in several ways, which come with different
name-capture guarantees (see Language.Haskell.TH.Syntax for
an explanation of name capture):
- the built-in syntax
'fand''Tcan be used to construct names, The expression'fgives aNamewhich refers to the valuefcurrently in scope, and''Tgives aNamewhich refers to the typeTcurrently in scope. These names can never be captured. lookupValueNameandlookupTypeNameare similar to'fand''Trespectively, but theNames are looked up at the point where the current splice is being run. These names can never be captured.newNamemonadically generates a new name, which can never be captured.mkNamegenerates a capturable name.
Names constructed using newName and mkName may be used in bindings
(such as let x = ... or x -> ...), but names constructed using
lookupValueName, lookupTypeName, 'f, ''T may not.
Instances
| Eq Name Source # | |
| Data Name Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Name -> c Name # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Name # dataTypeOf :: Name -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Name) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Name) # gmapT :: (forall b. Data b => b -> b) -> Name -> Name # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Name -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Name -> r # gmapQ :: (forall d. Data d => d -> u) -> Name -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Name -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Name -> m Name # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Name -> m Name # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Name -> m Name # | |
| Ord Name Source # | |
| Show Name Source # | |
| Generic Name Source # | |
| Binary Name Source # | |
| Ppr Name Source # | |
| type Rep Name Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Name = D1 ('MetaData "Name" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Name" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 OccName) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 NameFlavour))) | |
Instances
| Eq NameSpace Source # | |
| Data NameSpace Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> NameSpace -> c NameSpace # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c NameSpace # toConstr :: NameSpace -> Constr # dataTypeOf :: NameSpace -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c NameSpace) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c NameSpace) # gmapT :: (forall b. Data b => b -> b) -> NameSpace -> NameSpace # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> NameSpace -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> NameSpace -> r # gmapQ :: (forall d. Data d => d -> u) -> NameSpace -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> NameSpace -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> NameSpace -> m NameSpace # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> NameSpace -> m NameSpace # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> NameSpace -> m NameSpace # | |
| Ord NameSpace Source # | |
| Show NameSpace Source # | |
| Generic NameSpace Source # | |
| Binary NameSpace Source # | |
| type Rep NameSpace Source # | |
Defined in Language.Haskell.TH.Syntax type Rep NameSpace = D1 ('MetaData "NameSpace" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "VarName" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "DataName" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TcClsName" 'PrefixI 'False) (U1 :: Type -> Type))) | |
Constructing names
mkName :: String -> Name Source #
Generate a capturable name. Occurrences of such names will be resolved according to the Haskell scoping rules at the occurrence site.
For example:
f = [| pi + $(varE (mkName "pi")) |] ... g = let pi = 3 in $f
In this case, g is desugared to
g = Prelude.pi + 3
Note that mkName may be used with qualified names:
mkName "Prelude.pi"
See also dyn for a useful combinator. The above example could
be rewritten using dyn as
f = [| pi + $(dyn "pi") |]
newName :: String -> Q Name Source #
Generate a fresh name, which cannot be captured.
For example, this:
f = $(do nm1 <- newName "x" let nm2 =mkName"x" return (LamE[VarPnm1] (LamE [VarP nm2] (VarEnm1))) )
will produce the splice
f = \x0 -> \x -> x0
In particular, the occurrence VarE nm1 refers to the binding VarP nm1,
and is not captured by the binding VarP nm2.
Although names generated by newName cannot be captured, they can
capture other names. For example, this:
g = $(do nm1 <- newName "x" let nm2 = mkName "x" return (LamE [VarP nm2] (LamE [VarP nm1] (VarE nm2))) )
will produce the splice
g = \x -> \x0 -> x0
since the occurrence VarE nm2 is captured by the innermost binding
of x, namely VarP nm1.
Deconstructing names
nameBase :: Name -> String Source #
The name without its module prefix.
Examples
>>>nameBase ''Data.Either.Either"Either">>>nameBase (mkName "foo")"foo">>>nameBase (mkName "Module.foo")"foo"
nameModule :: Name -> Maybe String Source #
Module prefix of a name, if it exists.
Examples
>>>nameModule ''Data.Either.EitherJust "Data.Either">>>nameModule (mkName "foo")Nothing>>>nameModule (mkName "Module.foo")Just "Module"
namePackage :: Name -> Maybe String Source #
A name's package, if it exists.
Examples
>>>namePackage ''Data.Either.EitherJust "base">>>namePackage (mkName "foo")Nothing>>>namePackage (mkName "Module.foo")Nothing
nameSpace :: Name -> Maybe NameSpace Source #
Returns whether a name represents an occurrence of a top-level variable
(VarName), data constructor (DataName), type constructor, or type class
(TcClsName). If we can't be sure, it returns Nothing.
Examples
>>>nameSpace 'Prelude.idJust VarName>>>nameSpace (mkName "id")Nothing -- only works for top-level variable names>>>nameSpace 'Data.Maybe.JustJust DataName>>>nameSpace ''Data.Maybe.MaybeJust TcClsName>>>nameSpace ''Data.Ord.OrdJust TcClsName
Built-in names
tupleTypeName :: Int -> Name Source #
Tuple type constructor
tupleDataName :: Int -> Name Source #
Tuple data constructor
unboxedTupleTypeName :: Int -> Name Source #
Unboxed tuple type constructor
unboxedTupleDataName :: Int -> Name Source #
Unboxed tuple data constructor
unboxedSumTypeName :: SumArity -> Name Source #
Unboxed sum type constructor
The algebraic data types
The lowercase versions (syntax operators) of these constructors are
preferred to these constructors, since they compose better with
quotations ([| |]) and splices ($( ... ))
Declarations
Constructors
| FunD Name [Clause] | { f p1 p2 = b where decs } |
| ValD Pat Body [Dec] | { p = b where decs } |
| DataD Cxt Name [TyVarBndr] (Maybe Kind) [Con] [DerivClause] | { data Cxt x => T x = A x | B (T x)
deriving (Z,W)
deriving stock Eq } |
| NewtypeD Cxt Name [TyVarBndr] (Maybe Kind) Con [DerivClause] | { newtype Cxt x => T x = A (B x)
deriving (Z,W Q)
deriving stock Eq } |
| TySynD Name [TyVarBndr] Type | { type T x = (x,x) } |
| ClassD Cxt Name [TyVarBndr] [FunDep] [Dec] | { class Eq a => Ord a where ds } |
| InstanceD (Maybe Overlap) Cxt Type [Dec] | { instance {-# OVERLAPS #-}
Show w => Show [w] where ds } |
| SigD Name Type | { length :: [a] -> Int } |
| KiSigD Name Kind | { type TypeRep :: k -> Type } |
| ForeignD Foreign | { foreign import ... }
{ foreign export ... } |
| InfixD Fixity Name | { infix 3 foo } |
| PragmaD Pragma | { {-# INLINE [1] foo #-} } |
| DataFamilyD Name [TyVarBndr] (Maybe Kind) | { data family T a b c :: * } |
| DataInstD Cxt (Maybe [TyVarBndr]) Type (Maybe Kind) [Con] [DerivClause] | { data instance Cxt x => T [x]
= A x | B (T x)
deriving (Z,W)
deriving stock Eq } |
| NewtypeInstD Cxt (Maybe [TyVarBndr]) Type (Maybe Kind) Con [DerivClause] | { newtype instance Cxt x => T [x]
= A (B x)
deriving (Z,W)
deriving stock Eq } |
| TySynInstD TySynEqn | { type instance ... } |
| OpenTypeFamilyD TypeFamilyHead | { type family T a b c = (r :: *) | r -> a b } |
| ClosedTypeFamilyD TypeFamilyHead [TySynEqn] | { type family F a b = (r :: *) | r -> a where ... } |
| RoleAnnotD Name [Role] | { type role T nominal representational } |
| StandaloneDerivD (Maybe DerivStrategy) Cxt Type | { deriving stock instance Ord a => Ord (Foo a) } |
| DefaultSigD Name Type | { default size :: Data a => a -> Int } |
| PatSynD Name PatSynArgs PatSynDir Pat |
also, besides prefix pattern synonyms, both infix and record
pattern synonyms are supported. See |
| PatSynSigD Name PatSynType | A pattern synonym's type signature. |
| ImplicitParamBindD String Exp | { ?x = expr }Implicit parameter binding declaration. Can only be used in let and where clauses which consist entirely of implicit bindings. |
Instances
A single data constructor.
The constructors for Con can roughly be divided up into two categories:
those for constructors with "vanilla" syntax (NormalC, RecC, and
InfixC), and those for constructors with GADT syntax (GadtC and
RecGadtC). The ForallC constructor, which quantifies additional type
variables and class contexts, can surround either variety of constructor.
However, the type variables that it quantifies are different depending
on what constructor syntax is used:
- If a
ForallCsurrounds a constructor with vanilla syntax, then theForallCwill only quantify existential type variables. For example:
data Foo a = forall b. MkFoo a b
In MkFoo, ForallC will quantify b, but not a.
- If a
ForallCsurrounds a constructor with GADT syntax, then theForallCwill quantify all type variables used in the constructor. For example:
data Bar a b where
MkBar :: (a ~ b) => c -> MkBar a b
In MkBar, ForallC will quantify a, b, and c.
Constructors
| NormalC Name [BangType] | C Int a |
| RecC Name [VarBangType] | C { v :: Int, w :: a } |
| InfixC BangType Name BangType | Int :+ a |
| ForallC [TyVarBndr] Cxt Con | forall a. Eq a => C [a] |
| GadtC [Name] [BangType] Type | C :: a -> b -> T b Int |
| RecGadtC [Name] [VarBangType] Type | C :: { v :: Int } -> T b Int |
Instances
Instances
| Eq Clause Source # | |
| Data Clause Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Clause -> c Clause # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Clause # toConstr :: Clause -> Constr # dataTypeOf :: Clause -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Clause) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Clause) # gmapT :: (forall b. Data b => b -> b) -> Clause -> Clause # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Clause -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Clause -> r # gmapQ :: (forall d. Data d => d -> u) -> Clause -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Clause -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Clause -> m Clause # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Clause -> m Clause # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Clause -> m Clause # | |
| Ord Clause Source # | |
| Show Clause Source # | |
| Generic Clause Source # | |
| Binary Clause Source # | |
| Ppr Clause Source # | |
| type Rep Clause Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Clause = D1 ('MetaData "Clause" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Clause" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Pat]) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Body) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Dec])))) | |
data SourceUnpackedness Source #
Constructors
| NoSourceUnpackedness | C a |
| SourceNoUnpack | C { {-# NOUNPACK #-} } a |
| SourceUnpack | C { {-# UNPACK #-} } a |
Instances
data SourceStrictness Source #
Constructors
| NoSourceStrictness | C a |
| SourceLazy | C {~}a |
| SourceStrict | C {!}a |
Instances
data DecidedStrictness Source #
Unlike SourceStrictness and SourceUnpackedness, DecidedStrictness
refers to the strictness that the compiler chooses for a data constructor
field, which may be different from what is written in source code. See
reifyConStrictness for more information.
Constructors
| DecidedLazy | |
| DecidedStrict | |
| DecidedUnpack |
Instances
Constructors
| Bang SourceUnpackedness SourceStrictness | C { {-# UNPACK #-} !}a |
Instances
| Eq Bang Source # | |
| Data Bang Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Bang -> c Bang # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Bang # dataTypeOf :: Bang -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Bang) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Bang) # gmapT :: (forall b. Data b => b -> b) -> Bang -> Bang # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Bang -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Bang -> r # gmapQ :: (forall d. Data d => d -> u) -> Bang -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Bang -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Bang -> m Bang # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Bang -> m Bang # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Bang -> m Bang # | |
| Ord Bang Source # | |
| Show Bang Source # | |
| Generic Bang Source # | |
| Binary Bang Source # | |
| Ppr Bang Source # | |
| type Rep Bang Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Bang = D1 ('MetaData "Bang" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Bang" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SourceUnpackedness) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SourceStrictness))) | |
Instances
Constructors
| CCall | |
| StdCall | |
| CApi | |
| Prim | |
| JavaScript |
Instances
| Eq Callconv Source # | |
| Data Callconv Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Callconv -> c Callconv # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Callconv # toConstr :: Callconv -> Constr # dataTypeOf :: Callconv -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Callconv) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Callconv) # gmapT :: (forall b. Data b => b -> b) -> Callconv -> Callconv # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Callconv -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Callconv -> r # gmapQ :: (forall d. Data d => d -> u) -> Callconv -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Callconv -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Callconv -> m Callconv # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Callconv -> m Callconv # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Callconv -> m Callconv # | |
| Ord Callconv Source # | |
Defined in Language.Haskell.TH.Syntax | |
| Show Callconv Source # | |
| Generic Callconv Source # | |
| Binary Callconv Source # | |
| type Rep Callconv Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Callconv = D1 ('MetaData "Callconv" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) ((C1 ('MetaCons "CCall" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "StdCall" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "CApi" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "Prim" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "JavaScript" 'PrefixI 'False) (U1 :: Type -> Type)))) | |
Constructors
| Unsafe | |
| Safe | |
| Interruptible |
Instances
| Eq Safety Source # | |
| Data Safety Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Safety -> c Safety # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Safety # toConstr :: Safety -> Constr # dataTypeOf :: Safety -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Safety) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Safety) # gmapT :: (forall b. Data b => b -> b) -> Safety -> Safety # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Safety -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Safety -> r # gmapQ :: (forall d. Data d => d -> u) -> Safety -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Safety -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Safety -> m Safety # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Safety -> m Safety # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Safety -> m Safety # | |
| Ord Safety Source # | |
| Show Safety Source # | |
| Generic Safety Source # | |
| Binary Safety Source # | |
| type Rep Safety Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Safety = D1 ('MetaData "Safety" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Unsafe" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "Safe" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Interruptible" 'PrefixI 'False) (U1 :: Type -> Type))) | |
Constructors
| InlineP Name Inline RuleMatch Phases | |
| SpecialiseP Name Type (Maybe Inline) Phases | |
| SpecialiseInstP Type | |
| RuleP String (Maybe [TyVarBndr]) [RuleBndr] Exp Exp Phases | |
| AnnP AnnTarget Exp | |
| LineP Int String | |
| CompleteP [Name] (Maybe Name) | { {-# COMPLETE C_1, ..., C_i [ :: T ] #-} } |
Instances
Instances
| Eq Inline Source # | |
| Data Inline Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Inline -> c Inline # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Inline # toConstr :: Inline -> Constr # dataTypeOf :: Inline -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Inline) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Inline) # gmapT :: (forall b. Data b => b -> b) -> Inline -> Inline # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Inline -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Inline -> r # gmapQ :: (forall d. Data d => d -> u) -> Inline -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Inline -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Inline -> m Inline # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Inline -> m Inline # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Inline -> m Inline # | |
| Ord Inline Source # | |
| Show Inline Source # | |
| Generic Inline Source # | |
| Binary Inline Source # | |
| Ppr Inline Source # | |
| type Rep Inline Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Inline = D1 ('MetaData "Inline" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "NoInline" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "Inline" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "Inlinable" 'PrefixI 'False) (U1 :: Type -> Type))) | |
Instances
| Eq RuleMatch Source # | |
| Data RuleMatch Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> RuleMatch -> c RuleMatch # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c RuleMatch # toConstr :: RuleMatch -> Constr # dataTypeOf :: RuleMatch -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c RuleMatch) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RuleMatch) # gmapT :: (forall b. Data b => b -> b) -> RuleMatch -> RuleMatch # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> RuleMatch -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> RuleMatch -> r # gmapQ :: (forall d. Data d => d -> u) -> RuleMatch -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> RuleMatch -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> RuleMatch -> m RuleMatch # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> RuleMatch -> m RuleMatch # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> RuleMatch -> m RuleMatch # | |
| Ord RuleMatch Source # | |
| Show RuleMatch Source # | |
| Generic RuleMatch Source # | |
| Binary RuleMatch Source # | |
| Ppr RuleMatch Source # | |
| type Rep RuleMatch Source # | |
Defined in Language.Haskell.TH.Syntax | |
Constructors
| AllPhases | |
| FromPhase Int | |
| BeforePhase Int |
Instances
| Eq Phases Source # | |
| Data Phases Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Phases -> c Phases # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Phases # toConstr :: Phases -> Constr # dataTypeOf :: Phases -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Phases) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Phases) # gmapT :: (forall b. Data b => b -> b) -> Phases -> Phases # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Phases -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Phases -> r # gmapQ :: (forall d. Data d => d -> u) -> Phases -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Phases -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Phases -> m Phases # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Phases -> m Phases # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Phases -> m Phases # | |
| Ord Phases Source # | |
| Show Phases Source # | |
| Generic Phases Source # | |
| Binary Phases Source # | |
| Ppr Phases Source # | |
| type Rep Phases Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Phases = D1 ('MetaData "Phases" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "AllPhases" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "FromPhase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int)) :+: C1 ('MetaCons "BeforePhase" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int)))) | |
Constructors
| RuleVar Name | |
| TypedRuleVar Name Type |
Instances
| Eq RuleBndr Source # | |
| Data RuleBndr Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> RuleBndr -> c RuleBndr # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c RuleBndr # toConstr :: RuleBndr -> Constr # dataTypeOf :: RuleBndr -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c RuleBndr) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c RuleBndr) # gmapT :: (forall b. Data b => b -> b) -> RuleBndr -> RuleBndr # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> RuleBndr -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> RuleBndr -> r # gmapQ :: (forall d. Data d => d -> u) -> RuleBndr -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> RuleBndr -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> RuleBndr -> m RuleBndr # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> RuleBndr -> m RuleBndr # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> RuleBndr -> m RuleBndr # | |
| Ord RuleBndr Source # | |
Defined in Language.Haskell.TH.Syntax | |
| Show RuleBndr Source # | |
| Generic RuleBndr Source # | |
| Binary RuleBndr Source # | |
| Ppr RuleBndr Source # | |
| type Rep RuleBndr Source # | |
Defined in Language.Haskell.TH.Syntax type Rep RuleBndr = D1 ('MetaData "RuleBndr" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "RuleVar" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name)) :+: C1 ('MetaCons "TypedRuleVar" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type))) | |
Constructors
| ModuleAnnotation | |
| TypeAnnotation Name | |
| ValueAnnotation Name |
Instances
| Eq AnnTarget Source # | |
| Data AnnTarget Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> AnnTarget -> c AnnTarget # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c AnnTarget # toConstr :: AnnTarget -> Constr # dataTypeOf :: AnnTarget -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c AnnTarget) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c AnnTarget) # gmapT :: (forall b. Data b => b -> b) -> AnnTarget -> AnnTarget # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> AnnTarget -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> AnnTarget -> r # gmapQ :: (forall d. Data d => d -> u) -> AnnTarget -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> AnnTarget -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> AnnTarget -> m AnnTarget # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> AnnTarget -> m AnnTarget # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> AnnTarget -> m AnnTarget # | |
| Ord AnnTarget Source # | |
| Show AnnTarget Source # | |
| Generic AnnTarget Source # | |
| Binary AnnTarget Source # | |
| type Rep AnnTarget Source # | |
Defined in Language.Haskell.TH.Syntax type Rep AnnTarget = D1 ('MetaData "AnnTarget" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "ModuleAnnotation" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "TypeAnnotation" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name)) :+: C1 ('MetaCons "ValueAnnotation" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name)))) | |
Instances
| Eq FunDep Source # | |
| Data FunDep Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> FunDep -> c FunDep # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c FunDep # toConstr :: FunDep -> Constr # dataTypeOf :: FunDep -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c FunDep) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c FunDep) # gmapT :: (forall b. Data b => b -> b) -> FunDep -> FunDep # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> FunDep -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> FunDep -> r # gmapQ :: (forall d. Data d => d -> u) -> FunDep -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> FunDep -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> FunDep -> m FunDep # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> FunDep -> m FunDep # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> FunDep -> m FunDep # | |
| Ord FunDep Source # | |
| Show FunDep Source # | |
| Generic FunDep Source # | |
| Binary FunDep Source # | |
| Ppr FunDep Source # | |
| type Rep FunDep Source # | |
Defined in Language.Haskell.TH.Syntax type Rep FunDep = D1 ('MetaData "FunDep" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "FunDep" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Name]))) | |
One equation of a type family instance or closed type family. The arguments are the left-hand-side type and the right-hand-side result.
For instance, if you had the following type family:
type family Foo (a :: k) :: k where forall k (a :: k). Foo @k a = a
The Foo @k a = a equation would be represented as follows:
TySynEqn(Just[PlainTVk,KindedTVa (VarTk)]) (AppT(AppKindT(ConT''Foo) (VarTk)) (VarTa)) (VarTa)
Instances
| Eq TySynEqn Source # | |
| Data TySynEqn Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> TySynEqn -> c TySynEqn # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c TySynEqn # toConstr :: TySynEqn -> Constr # dataTypeOf :: TySynEqn -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c TySynEqn) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TySynEqn) # gmapT :: (forall b. Data b => b -> b) -> TySynEqn -> TySynEqn # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> TySynEqn -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> TySynEqn -> r # gmapQ :: (forall d. Data d => d -> u) -> TySynEqn -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> TySynEqn -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> TySynEqn -> m TySynEqn # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> TySynEqn -> m TySynEqn # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> TySynEqn -> m TySynEqn # | |
| Ord TySynEqn Source # | |
Defined in Language.Haskell.TH.Syntax | |
| Show TySynEqn Source # | |
| Generic TySynEqn Source # | |
| Binary TySynEqn Source # | |
| type Rep TySynEqn Source # | |
Defined in Language.Haskell.TH.Syntax type Rep TySynEqn = D1 ('MetaData "TySynEqn" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "TySynEqn" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe [TyVarBndr])) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type)))) | |
data TypeFamilyHead Source #
Common elements of OpenTypeFamilyD and ClosedTypeFamilyD. By
analogy with "head" for type classes and type class instances as
defined in Type classes: an exploration of the design space, the
TypeFamilyHead is defined to be the elements of the declaration
between type family and where.
Constructors
| TypeFamilyHead Name [TyVarBndr] FamilyResultSig (Maybe InjectivityAnn) |
Instances
Constructors
| Fixity Int FixityDirection |
Instances
| Eq Fixity Source # | |
| Data Fixity Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Fixity -> c Fixity # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Fixity # toConstr :: Fixity -> Constr # dataTypeOf :: Fixity -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Fixity) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Fixity) # gmapT :: (forall b. Data b => b -> b) -> Fixity -> Fixity # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Fixity -> r # gmapQ :: (forall d. Data d => d -> u) -> Fixity -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Fixity -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Fixity -> m Fixity # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Fixity -> m Fixity # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Fixity -> m Fixity # | |
| Ord Fixity Source # | |
| Show Fixity Source # | |
| Generic Fixity Source # | |
| Binary Fixity Source # | |
| type Rep Fixity Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Fixity = D1 ('MetaData "Fixity" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Fixity" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 FixityDirection))) | |
data FixityDirection Source #
Instances
defaultFixity :: Fixity Source #
Default fixity: infixl 9
maxPrecedence :: Int Source #
Highest allowed operator precedence for Fixity constructor (answer: 9)
A pattern synonym's directionality.
Constructors
| Unidir | pattern P x {<-} p |
| ImplBidir | pattern P x {=} p |
| ExplBidir [Clause] | pattern P x {<-} p where P x = e |
Instances
| Eq PatSynDir Source # | |
| Data PatSynDir Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> PatSynDir -> c PatSynDir # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c PatSynDir # toConstr :: PatSynDir -> Constr # dataTypeOf :: PatSynDir -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c PatSynDir) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c PatSynDir) # gmapT :: (forall b. Data b => b -> b) -> PatSynDir -> PatSynDir # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> PatSynDir -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> PatSynDir -> r # gmapQ :: (forall d. Data d => d -> u) -> PatSynDir -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> PatSynDir -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> PatSynDir -> m PatSynDir # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> PatSynDir -> m PatSynDir # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> PatSynDir -> m PatSynDir # | |
| Ord PatSynDir Source # | |
| Show PatSynDir Source # | |
| Generic PatSynDir Source # | |
| Binary PatSynDir Source # | |
| Ppr PatSynDir Source # | |
| type Rep PatSynDir Source # | |
Defined in Language.Haskell.TH.Syntax type Rep PatSynDir = D1 ('MetaData "PatSynDir" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Unidir" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "ImplBidir" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ExplBidir" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Clause])))) | |
data PatSynArgs Source #
A pattern synonym's argument type.
Constructors
| PrefixPatSyn [Name] | pattern P {x y z} = p |
| InfixPatSyn Name Name | pattern {x P y} = p |
| RecordPatSyn [Name] | pattern P { {x,y,z} } = p |
Instances
Expressions
Constructors
| VarE Name | { x } |
| ConE Name | data T1 = C1 t1 t2; p = {C1} e1 e2 |
| LitE Lit | { 5 or 'c'} |
| AppE Exp Exp | { f x } |
| AppTypeE Exp Type | { f @Int } |
| InfixE (Maybe Exp) Exp (Maybe Exp) | {x + y} or {(x+)} or {(+ x)} or {(+)} |
| UInfixE Exp Exp Exp | {x + y} |
| ParensE Exp | { (e) } |
| LamE [Pat] Exp | { \ p1 p2 -> e } |
| LamCaseE [Match] | { \case m1; m2 } |
| TupE [Maybe Exp] | { (e1,e2) }The (1,) translates to TupE [Just (LitE (IntegerL 1)),Nothing] |
| UnboxedTupE [Maybe Exp] | { (# e1,e2 #) }The (# 'c', #) translates to UnboxedTupE [Just (LitE (CharL 'c')),Nothing] |
| UnboxedSumE Exp SumAlt SumArity | { (#|e|#) } |
| CondE Exp Exp Exp | { if e1 then e2 else e3 } |
| MultiIfE [(Guard, Exp)] | { if | g1 -> e1 | g2 -> e2 } |
| LetE [Dec] Exp | { let { x=e1; y=e2 } in e3 } |
| CaseE Exp [Match] | { case e of m1; m2 } |
| DoE [Stmt] | { do { p <- e1; e2 } } |
| MDoE [Stmt] | { mdo { x <- e1 y; y <- e2 x; } } |
| CompE [Stmt] | { [ (x,y) | x <- xs, y <- ys ] }The result expression of the comprehension is
the last of the E.g. translation: [ f x | x <- xs ] CompE [BindS (VarP x) (VarE xs), NoBindS (AppE (VarE f) (VarE x))] |
| ArithSeqE Range | { [ 1 ,2 .. 10 ] } |
| ListE [Exp] | { [1,2,3] } |
| SigE Exp Type | { e :: t } |
| RecConE Name [FieldExp] | { T { x = y, z = w } } |
| RecUpdE Exp [FieldExp] | { (f x) { z = w } } |
| StaticE Exp | { static e } |
| UnboundVarE Name | { _x }This is used for holes or unresolved identifiers in AST quotes. Note that it could either have a variable name or constructor name. |
| LabelE String |
|
| ImplicitParamVarE String |
|
Instances
Instances
| Eq Match Source # | |
| Data Match Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Match -> c Match # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Match # dataTypeOf :: Match -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Match) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Match) # gmapT :: (forall b. Data b => b -> b) -> Match -> Match # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Match -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Match -> r # gmapQ :: (forall d. Data d => d -> u) -> Match -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Match -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Match -> m Match # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Match -> m Match # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Match -> m Match # | |
| Ord Match Source # | |
| Show Match Source # | |
| Generic Match Source # | |
| Binary Match Source # | |
| Ppr Match Source # | |
| type Rep Match Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Match = D1 ('MetaData "Match" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "Match" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Pat) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Body) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Dec])))) | |
Constructors
| GuardedB [(Guard, Exp)] | f p { | e1 = e2
| e3 = e4 }
where ds |
| NormalB Exp | f p { = e } where ds |
Instances
| Eq Body Source # | |
| Data Body Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Body -> c Body # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Body # dataTypeOf :: Body -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Body) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Body) # gmapT :: (forall b. Data b => b -> b) -> Body -> Body # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Body -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Body -> r # gmapQ :: (forall d. Data d => d -> u) -> Body -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Body -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Body -> m Body # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Body -> m Body # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Body -> m Body # | |
| Ord Body Source # | |
| Show Body Source # | |
| Generic Body Source # | |
| Binary Body Source # | |
| type Rep Body Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Body = D1 ('MetaData "Body" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "GuardedB" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [(Guard, Exp)])) :+: C1 ('MetaCons "NormalB" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Exp))) | |
Instances
| Eq Guard Source # | |
| Data Guard Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Guard -> c Guard # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Guard # dataTypeOf :: Guard -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Guard) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Guard) # gmapT :: (forall b. Data b => b -> b) -> Guard -> Guard # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Guard -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Guard -> r # gmapQ :: (forall d. Data d => d -> u) -> Guard -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Guard -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Guard -> m Guard # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Guard -> m Guard # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Guard -> m Guard # | |
| Ord Guard Source # | |
| Show Guard Source # | |
| Generic Guard Source # | |
| Binary Guard Source # | |
| type Rep Guard Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Guard = D1 ('MetaData "Guard" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "NormalG" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Exp)) :+: C1 ('MetaCons "PatG" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Stmt]))) | |
Constructors
| BindS Pat Exp | p <- e |
| LetS [Dec] | { let { x=e1; y=e2 } } |
| NoBindS Exp | e |
| ParS [[Stmt]] |
|
| RecS [Stmt] | rec { s1; s2 } |
Instances
Instances
Constructors
| CharL Char | |
| StringL String | |
| IntegerL Integer | Used for overloaded and non-overloaded literals. We don't have a good way to represent non-overloaded literals at the moment. Maybe that doesn't matter? |
| RationalL Rational | |
| IntPrimL Integer | |
| WordPrimL Integer | |
| FloatPrimL Rational | |
| DoublePrimL Rational | |
| StringPrimL [Word8] | A primitive C-style string, type |
| BytesPrimL Bytes | Some raw bytes, type |
| CharPrimL Char |
Instances
Patterns
Pattern in Haskell given in {}
Constructors
| LitP Lit | { 5 or 'c' } |
| VarP Name | { x } |
| TupP [Pat] | { (p1,p2) } |
| UnboxedTupP [Pat] | { (# p1,p2 #) } |
| UnboxedSumP Pat SumAlt SumArity | { (#|p|#) } |
| ConP Name [Pat] | data T1 = C1 t1 t2; {C1 p1 p1} = e |
| InfixP Pat Name Pat | foo ({x :+ y}) = e |
| UInfixP Pat Name Pat | foo ({x :+ y}) = e |
| ParensP Pat | {(p)} |
| TildeP Pat | { ~p } |
| BangP Pat | { !p } |
| AsP Name Pat | { x @ p } |
| WildP | { _ } |
| RecP Name [FieldPat] | f (Pt { pointx = x }) = g x |
| ListP [Pat] | { [1,2,3] } |
| SigP Pat Type | { p :: t } |
| ViewP Exp Pat | { e -> p } |
Instances
Types
Constructors
| ForallT [TyVarBndr] Cxt Type | forall <vars>. <ctxt> => <type> |
| ForallVisT [TyVarBndr] Type | forall <vars> -> <type> |
| AppT Type Type | T a b |
| AppKindT Type Kind | T @k t |
| SigT Type Kind | t :: k |
| VarT Name | a |
| ConT Name | T |
| PromotedT Name | 'T |
| InfixT Type Name Type | T + T |
| UInfixT Type Name Type | T + T |
| ParensT Type | (T) |
| TupleT Int | (,), (,,), etc. |
| UnboxedTupleT Int | (#,#), (#,,#), etc. |
| UnboxedSumT SumArity | (#|#), (#||#), etc. |
| ArrowT | -> |
| EqualityT | ~ |
| ListT | [] |
| PromotedTupleT Int | '(), '(,), '(,,), etc. |
| PromotedNilT | '[] |
| PromotedConsT | (':) |
| StarT | * |
| ConstraintT | Constraint |
| LitT TyLit | 0,1,2, etc. |
| WildCardT | _ |
| ImplicitParamT String Type | ?x :: t |
Instances
Instances
| Eq TyVarBndr Source # | |
| Data TyVarBndr Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> TyVarBndr -> c TyVarBndr # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c TyVarBndr # toConstr :: TyVarBndr -> Constr # dataTypeOf :: TyVarBndr -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c TyVarBndr) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TyVarBndr) # gmapT :: (forall b. Data b => b -> b) -> TyVarBndr -> TyVarBndr # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> TyVarBndr -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> TyVarBndr -> r # gmapQ :: (forall d. Data d => d -> u) -> TyVarBndr -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> TyVarBndr -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> TyVarBndr -> m TyVarBndr # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> TyVarBndr -> m TyVarBndr # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> TyVarBndr -> m TyVarBndr # | |
| Ord TyVarBndr Source # | |
| Show TyVarBndr Source # | |
| Generic TyVarBndr Source # | |
| Binary TyVarBndr Source # | |
| Ppr TyVarBndr Source # | |
| type Rep TyVarBndr Source # | |
Defined in Language.Haskell.TH.Syntax type Rep TyVarBndr = D1 ('MetaData "TyVarBndr" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "PlainTV" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name)) :+: C1 ('MetaCons "KindedTV" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Kind))) | |
Instances
| Eq TyLit Source # | |
| Data TyLit Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> TyLit -> c TyLit # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c TyLit # dataTypeOf :: TyLit -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c TyLit) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c TyLit) # gmapT :: (forall b. Data b => b -> b) -> TyLit -> TyLit # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> TyLit -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> TyLit -> r # gmapQ :: (forall d. Data d => d -> u) -> TyLit -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> TyLit -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> TyLit -> m TyLit # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> TyLit -> m TyLit # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> TyLit -> m TyLit # | |
| Ord TyLit Source # | |
| Show TyLit Source # | |
| Generic TyLit Source # | |
| Binary TyLit Source # | |
| Ppr TyLit Source # | |
| type Rep TyLit Source # | |
Defined in Language.Haskell.TH.Syntax type Rep TyLit = D1 ('MetaData "TyLit" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) (C1 ('MetaCons "NumTyLit" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Integer)) :+: C1 ('MetaCons "StrTyLit" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 String))) | |
To avoid duplication between kinds and types, they
are defined to be the same. Naturally, you would never
have a type be StarT and you would never have a kind
be SigT, but many of the other constructors are shared.
Note that the kind Bool is denoted with ConT, not
PromotedT. Similarly, tuple kinds are made with TupleT,
not PromotedTupleT.
Since the advent of ConstraintKinds, constraints are really just types.
Equality constraints use the EqualityT constructor. Constraints may also
be tuples of other constraints.
Role annotations
Constructors
| NominalR | nominal |
| RepresentationalR | representational |
| PhantomR | phantom |
| InferR | _ |
Instances
| Eq Role Source # | |
| Data Role Source # | |
Defined in Language.Haskell.TH.Syntax Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Role -> c Role # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Role # dataTypeOf :: Role -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c Role) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Role) # gmapT :: (forall b. Data b => b -> b) -> Role -> Role # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Role -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Role -> r # gmapQ :: (forall d. Data d => d -> u) -> Role -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Role -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Role -> m Role # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Role -> m Role # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Role -> m Role # | |
| Ord Role Source # | |
| Show Role Source # | |
| Generic Role Source # | |
| Binary Role Source # | |
| Ppr Role Source # | |
| type Rep Role Source # | |
Defined in Language.Haskell.TH.Syntax type Rep Role = D1 ('MetaData "Role" "Language.Haskell.TH.Syntax" "ghc-lib-parser-8.10.4.20210206-Jn5qJce2z7IF65HRiYXDIY" 'False) ((C1 ('MetaCons "NominalR" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "RepresentationalR" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "PhantomR" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "InferR" 'PrefixI 'False) (U1 :: Type -> Type))) | |
data FamilyResultSig Source #
Type family result signature
Instances
data InjectivityAnn Source #
Injectivity annotation
Constructors
| InjectivityAnn Name [Name] |
Instances
type PatSynType = Type Source #
A pattern synonym's type. Note that a pattern synonym's fully specified type has a peculiar shape coming with two forall quantifiers and two constraint contexts. For example, consider the pattern synonym
pattern P x1 x2 ... xn = <some-pattern>
P's complete type is of the following form
pattern P :: forall universals. required constraints
=> forall existentials. provided constraints
=> t1 -> t2 -> ... -> tn -> tconsisting of four parts:
- the (possibly empty lists of) universally quantified type variables and required constraints on them.
- the (possibly empty lists of) existentially quantified type variables and the provided constraints on them.
- the types
t1,t2, ..,tnofx1,x2, ..,xn, respectively - the type
tof<some-pattern>, mentioning only universals.
Pattern synonym types interact with TH when (a) reifying a pattern synonym, (b) pretty printing, or (c) specifying a pattern synonym's type signature explicitly:
- Reification always returns a pattern synonym's fully specified type in abstract syntax.
- Pretty printing via
pprPatSynTypeabbreviates a pattern synonym's type unambiguously in concrete syntax: The rule of thumb is to print initial empty universals and the required context as() =>, if existentials and a provided context follow. If only universals and their required context, but no existentials are specified, only the universals and their required context are printed. If both or none are specified, so both (or none) are printed. - When specifying a pattern synonym's type explicitly with
PatSynSigDeither one of the universals, the existentials, or their contexts may be left empty.
See the GHC user's guide for more information on pattern synonyms and their types: https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/glasgow_exts.html#pattern-synonyms.
Library functions
module Language.Haskell.TH.Lib
Pretty-printer
Minimal complete definition
Instances
| Ppr Role Source # | |
| Ppr TyLit Source # | |
| Ppr InjectivityAnn Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr FamilyResultSig Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr TyVarBndr Source # | |
| Ppr Type Source # | |
| Ppr PatSynArgs Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr PatSynDir Source # | |
| Ppr Bang Source # | |
| Ppr Con Source # | |
| Ppr DecidedStrictness Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr SourceStrictness Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr SourceUnpackedness Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr RuleBndr Source # | |
| Ppr Phases Source # | |
| Ppr RuleMatch Source # | |
| Ppr Inline Source # | |
| Ppr Pragma Source # | |
| Ppr Foreign Source # | |
| Ppr FunDep Source # | |
| Ppr Dec Source # | |
| Ppr Range Source # | |
| Ppr Stmt Source # | |
| Ppr Exp Source # | |
| Ppr Clause Source # | |
| Ppr Match Source # | |
| Ppr Pat Source # | |
| Ppr Lit Source # | |
| Ppr ModuleInfo Source # | |
Defined in Language.Haskell.TH.Ppr | |
| Ppr Info Source # | |
| Ppr Loc Source # | |
| Ppr Name Source # | |
| Ppr Module Source # | |
| Ppr TypeArg Source # | |
| Ppr a => Ppr [a] Source # | |
pprParendType :: Type -> Doc Source #