template-haskell-2.12.0.0: Support library for Template Haskell

Safe HaskellSafe
LanguageHaskell2010

Language.Haskell.TH.Lib

Contents

Description

TH.Lib contains lots of useful helper functions for generating and manipulating Template Haskell terms

Synopsis

Library functions

Abbreviations

type InfoQ = Q Info Source #

type ExpQ = Q Exp Source #

type TExpQ a = Q (TExp a) Source #

type DecQ = Q Dec Source #

type DecsQ = Q [Dec] Source #

type ConQ = Q Con Source #

type TypeQ = Q Type Source #

type TyLitQ = Q TyLit Source #

type CxtQ = Q Cxt Source #

type PredQ = Q Pred Source #

type DerivClauseQ = Q DerivClause Source #

type MatchQ = Q Match Source #

type ClauseQ = Q Clause Source #

type BodyQ = Q Body Source #

type GuardQ = Q Guard Source #

type StmtQ = Q Stmt Source #

type RangeQ = Q Range Source #

type SourceStrictnessQ = Q SourceStrictness Source #

type SourceUnpackednessQ = Q SourceUnpackedness Source #

type BangQ = Q Bang Source #

type BangTypeQ = Q BangType Source #

type VarBangTypeQ = Q VarBangType Source #

type StrictTypeQ = Q StrictType Source #

type VarStrictTypeQ = Q VarStrictType Source #

type FieldExpQ = Q FieldExp Source #

type PatQ = Q Pat Source #

type FieldPatQ = Q FieldPat Source #

type RuleBndrQ = Q RuleBndr Source #

type TySynEqnQ = Q TySynEqn Source #

type PatSynDirQ = Q PatSynDir Source #

type PatSynArgsQ = Q PatSynArgs Source #

Constructors lifted to Q

Literals

intPrimL :: Integer -> Lit Source #

wordPrimL :: Integer -> Lit Source #

floatPrimL :: Rational -> Lit Source #

doublePrimL :: Rational -> Lit Source #

integerL :: Integer -> Lit Source #

rationalL :: Rational -> Lit Source #

charL :: Char -> Lit Source #

stringL :: String -> Lit Source #

stringPrimL :: [Word8] -> Lit Source #

charPrimL :: Char -> Lit Source #

Patterns

litP :: Lit -> PatQ Source #

varP :: Name -> PatQ Source #

tupP :: [PatQ] -> PatQ Source #

unboxedTupP :: [PatQ] -> PatQ Source #

unboxedSumP :: PatQ -> SumAlt -> SumArity -> PatQ Source #

conP :: Name -> [PatQ] -> PatQ Source #

uInfixP :: PatQ -> Name -> PatQ -> PatQ Source #

parensP :: PatQ -> PatQ Source #

infixP :: PatQ -> Name -> PatQ -> PatQ Source #

tildeP :: PatQ -> PatQ Source #

bangP :: PatQ -> PatQ Source #

asP :: Name -> PatQ -> PatQ Source #

wildP :: PatQ Source #

recP :: Name -> [FieldPatQ] -> PatQ Source #

listP :: [PatQ] -> PatQ Source #

sigP :: PatQ -> TypeQ -> PatQ Source #

viewP :: ExpQ -> PatQ -> PatQ Source #

fieldPat :: Name -> PatQ -> FieldPatQ Source #

Pattern Guards

normalB :: ExpQ -> BodyQ Source #

guardedB :: [Q (Guard, Exp)] -> BodyQ Source #

normalG :: ExpQ -> GuardQ Source #

normalGE :: ExpQ -> ExpQ -> Q (Guard, Exp) Source #

patG :: [StmtQ] -> GuardQ Source #

patGE :: [StmtQ] -> ExpQ -> Q (Guard, Exp) Source #

match :: PatQ -> BodyQ -> [DecQ] -> MatchQ Source #

Use with caseE

clause :: [PatQ] -> BodyQ -> [DecQ] -> ClauseQ Source #

Use with funD

Expressions

dyn :: String -> ExpQ Source #

Dynamically binding a variable (unhygenic)

varE :: Name -> ExpQ Source #

unboundVarE :: Name -> ExpQ Source #

conE :: Name -> ExpQ Source #

litE :: Lit -> ExpQ Source #

appE :: ExpQ -> ExpQ -> ExpQ Source #

appTypeE :: ExpQ -> TypeQ -> ExpQ Source #

uInfixE :: ExpQ -> ExpQ -> ExpQ -> ExpQ Source #

parensE :: ExpQ -> ExpQ Source #

staticE :: ExpQ -> ExpQ Source #

staticE x = [| static x |]

infixE :: Maybe ExpQ -> ExpQ -> Maybe ExpQ -> ExpQ Source #

infixApp :: ExpQ -> ExpQ -> ExpQ -> ExpQ Source #

sectionL :: ExpQ -> ExpQ -> ExpQ Source #

sectionR :: ExpQ -> ExpQ -> ExpQ Source #

lamE :: [PatQ] -> ExpQ -> ExpQ Source #

lam1E :: PatQ -> ExpQ -> ExpQ Source #

Single-arg lambda

lamCaseE :: [MatchQ] -> ExpQ Source #

tupE :: [ExpQ] -> ExpQ Source #

unboxedTupE :: [ExpQ] -> ExpQ Source #

unboxedSumE :: ExpQ -> SumAlt -> SumArity -> ExpQ Source #

condE :: ExpQ -> ExpQ -> ExpQ -> ExpQ Source #

multiIfE :: [Q (Guard, Exp)] -> ExpQ Source #

letE :: [DecQ] -> ExpQ -> ExpQ Source #

caseE :: ExpQ -> [MatchQ] -> ExpQ Source #

appsE :: [ExpQ] -> ExpQ Source #

listE :: [ExpQ] -> ExpQ Source #

sigE :: ExpQ -> TypeQ -> ExpQ Source #

recConE :: Name -> [Q (Name, Exp)] -> ExpQ Source #

recUpdE :: ExpQ -> [Q (Name, Exp)] -> ExpQ Source #

stringE :: String -> ExpQ Source #

fieldExp :: Name -> ExpQ -> Q (Name, Exp) Source #

Ranges

fromE :: ExpQ -> ExpQ Source #

fromThenE :: ExpQ -> ExpQ -> ExpQ Source #

fromToE :: ExpQ -> ExpQ -> ExpQ Source #

fromThenToE :: ExpQ -> ExpQ -> ExpQ -> ExpQ Source #

Ranges with more indirection

arithSeqE :: RangeQ -> ExpQ Source #

fromR :: ExpQ -> RangeQ Source #

fromThenR :: ExpQ -> ExpQ -> RangeQ Source #

fromToR :: ExpQ -> ExpQ -> RangeQ Source #

fromThenToR :: ExpQ -> ExpQ -> ExpQ -> RangeQ Source #

Statements

doE :: [StmtQ] -> ExpQ Source #

compE :: [StmtQ] -> ExpQ Source #

bindS :: PatQ -> ExpQ -> StmtQ Source #

letS :: [DecQ] -> StmtQ Source #

noBindS :: ExpQ -> StmtQ Source #

parS :: [[StmtQ]] -> StmtQ Source #

Types

forallT :: [TyVarBndr] -> CxtQ -> TypeQ -> TypeQ Source #

varT :: Name -> TypeQ Source #

conT :: Name -> TypeQ Source #

appT :: TypeQ -> TypeQ -> TypeQ Source #

arrowT :: TypeQ Source #

infixT :: TypeQ -> Name -> TypeQ -> TypeQ Source #

uInfixT :: TypeQ -> Name -> TypeQ -> TypeQ Source #

parensT :: TypeQ -> TypeQ Source #

equalityT :: TypeQ Source #

listT :: TypeQ Source #

tupleT :: Int -> TypeQ Source #

unboxedTupleT :: Int -> TypeQ Source #

unboxedSumT :: SumArity -> TypeQ Source #

sigT :: TypeQ -> Kind -> TypeQ Source #

litT :: TyLitQ -> TypeQ Source #

wildCardT :: TypeQ Source #

promotedT :: Name -> TypeQ Source #

promotedTupleT :: Int -> TypeQ Source #

promotedNilT :: TypeQ Source #

promotedConsT :: TypeQ Source #

Type literals

numTyLit :: Integer -> TyLitQ Source #

strTyLit :: String -> TyLitQ Source #

Strictness

noSourceUnpackedness :: SourceUnpackednessQ Source #

sourceNoUnpack :: SourceUnpackednessQ Source #

sourceUnpack :: SourceUnpackednessQ Source #

noSourceStrictness :: SourceStrictnessQ Source #

sourceLazy :: SourceStrictnessQ Source #

sourceStrict :: SourceStrictnessQ Source #

isStrict :: Q Strict Source #

Deprecated: Use bang. See https://ghc.haskell.org/trac/ghc/wiki/Migration/8.0. Example usage: 'bang noSourceUnpackedness sourceStrict'

notStrict :: Q Strict Source #

Deprecated: Use bang. See https://ghc.haskell.org/trac/ghc/wiki/Migration/8.0. Example usage: 'bang noSourceUnpackedness noSourceStrictness'

unpacked :: Q Strict Source #

Deprecated: Use bang. See https://ghc.haskell.org/trac/ghc/wiki/Migration/8.0. Example usage: 'bang sourceUnpack sourceStrict'

bang :: SourceUnpackednessQ -> SourceStrictnessQ -> BangQ Source #

bangType :: BangQ -> TypeQ -> BangTypeQ Source #

varBangType :: Name -> BangTypeQ -> VarBangTypeQ Source #

strictType :: Q Strict -> TypeQ -> StrictTypeQ Source #

Deprecated: As of template-haskell-2.11.0.0, StrictType has been replaced by BangType. Please use bangType instead.

varStrictType :: Name -> StrictTypeQ -> VarStrictTypeQ Source #

Deprecated: As of template-haskell-2.11.0.0, VarStrictType has been replaced by VarBangType. Please use varBangType instead.

Class Contexts

cxt :: [PredQ] -> CxtQ Source #

classP :: Name -> [Q Type] -> Q Pred Source #

Deprecated: As of template-haskell-2.10, constraint predicates (Pred) are just types (Type), in keeping with ConstraintKinds. Please use conT and appT.

equalP :: TypeQ -> TypeQ -> PredQ Source #

Deprecated: As of template-haskell-2.10, constraint predicates (Pred) are just types (Type), in keeping with ConstraintKinds. Please see equalityT.

Constructors

normalC :: Name -> [BangTypeQ] -> ConQ Source #

recC :: Name -> [VarBangTypeQ] -> ConQ Source #

infixC :: Q (Bang, Type) -> Name -> Q (Bang, Type) -> ConQ Source #

forallC :: [TyVarBndr] -> CxtQ -> ConQ -> ConQ Source #

gadtC :: [Name] -> [StrictTypeQ] -> TypeQ -> ConQ Source #

recGadtC :: [Name] -> [VarStrictTypeQ] -> TypeQ -> ConQ Source #

Kinds

varK :: Name -> Kind Source #

conK :: Name -> Kind Source #

tupleK :: Int -> Kind Source #

arrowK :: Kind Source #

listK :: Kind Source #

appK :: Kind -> Kind -> Kind Source #

starK :: Kind Source #

constraintK :: Kind Source #

Type variable binders

plainTV :: Name -> TyVarBndr Source #

kindedTV :: Name -> Kind -> TyVarBndr Source #

Roles

nominalR :: Role Source #

representationalR :: Role Source #

phantomR :: Role Source #

inferR :: Role Source #

Top Level Declarations

Data

valD :: PatQ -> BodyQ -> [DecQ] -> DecQ Source #

funD :: Name -> [ClauseQ] -> DecQ Source #

tySynD :: Name -> [TyVarBndr] -> TypeQ -> DecQ Source #

dataD :: CxtQ -> Name -> [TyVarBndr] -> Maybe Kind -> [ConQ] -> [DerivClauseQ] -> DecQ Source #

newtypeD :: CxtQ -> Name -> [TyVarBndr] -> Maybe Kind -> ConQ -> [DerivClauseQ] -> DecQ Source #

derivClause :: Maybe DerivStrategy -> [PredQ] -> DerivClauseQ Source #

data DerivClause Source #

A single deriving clause at the end of a datatype.

Constructors

DerivClause (Maybe DerivStrategy) Cxt
{ deriving stock (Eq, Ord) }

Instances

Eq DerivClause # 
Data DerivClause # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> DerivClause -> c DerivClause Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c DerivClause Source #

toConstr :: DerivClause -> Constr Source #

dataTypeOf :: DerivClause -> DataType Source #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c DerivClause) Source #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c DerivClause) Source #

gmapT :: (forall b. Data b => b -> b) -> DerivClause -> DerivClause Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> DerivClause -> r Source #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> DerivClause -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> DerivClause -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> DerivClause -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> DerivClause -> m DerivClause Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> DerivClause -> m DerivClause Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> DerivClause -> m DerivClause Source #

Ord DerivClause # 
Show DerivClause # 
Generic DerivClause # 

Associated Types

type Rep DerivClause :: * -> * Source #

Methods

from :: DerivClause -> Rep DerivClause x Source #

to :: Rep DerivClause x -> DerivClause Source #

type Rep DerivClause # 

data DerivStrategy Source #

What the user explicitly requests when deriving an instance.

Constructors

StockStrategy

A "standard" derived instance

AnyclassStrategy
-XDeriveAnyClass
NewtypeStrategy
-XGeneralizedNewtypeDeriving

Instances

Eq DerivStrategy # 
Data DerivStrategy # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> DerivStrategy -> c DerivStrategy Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c DerivStrategy Source #

toConstr :: DerivStrategy -> Constr Source #

dataTypeOf :: DerivStrategy -> DataType Source #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c DerivStrategy) Source #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c DerivStrategy) Source #

gmapT :: (forall b. Data b => b -> b) -> DerivStrategy -> DerivStrategy Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> DerivStrategy -> r Source #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> DerivStrategy -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> DerivStrategy -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> DerivStrategy -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> DerivStrategy -> m DerivStrategy Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> DerivStrategy -> m DerivStrategy Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> DerivStrategy -> m DerivStrategy Source #

Ord DerivStrategy # 
Show DerivStrategy # 
Generic DerivStrategy # 
type Rep DerivStrategy # 
type Rep DerivStrategy = D1 * (MetaData "DerivStrategy" "Language.Haskell.TH.Syntax" "template-haskell" False) ((:+:) * (C1 * (MetaCons "StockStrategy" PrefixI False) (U1 *)) ((:+:) * (C1 * (MetaCons "AnyclassStrategy" PrefixI False) (U1 *)) (C1 * (MetaCons "NewtypeStrategy" PrefixI False) (U1 *))))

Class

classD :: CxtQ -> Name -> [TyVarBndr] -> [FunDep] -> [DecQ] -> DecQ Source #

instanceD :: CxtQ -> TypeQ -> [DecQ] -> DecQ Source #

instanceWithOverlapD :: Maybe Overlap -> CxtQ -> TypeQ -> [DecQ] -> DecQ Source #

data Overlap Source #

Varieties of allowed instance overlap.

Constructors

Overlappable

May be overlapped by more specific instances

Overlapping

May overlap a more general instance

Overlaps

Both Overlapping and Overlappable

Incoherent

Both Overlappable and Overlappable, and pick an arbitrary one if multiple choices are available.

Instances

Eq Overlap # 

Methods

(==) :: Overlap -> Overlap -> Bool #

(/=) :: Overlap -> Overlap -> Bool #

Data Overlap # 

Methods

gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> Overlap -> c Overlap Source #

gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c Overlap Source #

toConstr :: Overlap -> Constr Source #

dataTypeOf :: Overlap -> DataType Source #

dataCast1 :: Typeable (* -> *) t => (forall d. Data d => c (t d)) -> Maybe (c Overlap) Source #

dataCast2 :: Typeable (* -> * -> *) t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c Overlap) Source #

gmapT :: (forall b. Data b => b -> b) -> Overlap -> Overlap Source #

gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Overlap -> r Source #

gmapQr :: (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Overlap -> r Source #

gmapQ :: (forall d. Data d => d -> u) -> Overlap -> [u] Source #

gmapQi :: Int -> (forall d. Data d => d -> u) -> Overlap -> u Source #

gmapM :: Monad m => (forall d. Data d => d -> m d) -> Overlap -> m Overlap Source #

gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Overlap -> m Overlap Source #

gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Overlap -> m Overlap Source #

Ord Overlap # 
Show Overlap # 
Generic Overlap # 

Associated Types

type Rep Overlap :: * -> * Source #

Methods

from :: Overlap -> Rep Overlap x Source #

to :: Rep Overlap x -> Overlap Source #

type Rep Overlap # 
type Rep Overlap = D1 * (MetaData "Overlap" "Language.Haskell.TH.Syntax" "template-haskell" False) ((:+:) * ((:+:) * (C1 * (MetaCons "Overlappable" PrefixI False) (U1 *)) (C1 * (MetaCons "Overlapping" PrefixI False) (U1 *))) ((:+:) * (C1 * (MetaCons "Overlaps" PrefixI False) (U1 *)) (C1 * (MetaCons "Incoherent" PrefixI False) (U1 *))))

sigD :: Name -> TypeQ -> DecQ Source #

standaloneDerivD :: CxtQ -> TypeQ -> DecQ Source #

standaloneDerivWithStrategyD :: Maybe DerivStrategy -> CxtQ -> TypeQ -> DecQ Source #

defaultSigD :: Name -> TypeQ -> DecQ Source #

Role annotations

roleAnnotD :: Name -> [Role] -> DecQ Source #

Type Family / Data Family

dataFamilyD :: Name -> [TyVarBndr] -> Maybe Kind -> DecQ Source #

openTypeFamilyD :: Name -> [TyVarBndr] -> FamilyResultSig -> Maybe InjectivityAnn -> DecQ Source #

closedTypeFamilyD :: Name -> [TyVarBndr] -> FamilyResultSig -> Maybe InjectivityAnn -> [TySynEqnQ] -> DecQ Source #

dataInstD :: CxtQ -> Name -> [TypeQ] -> Maybe Kind -> [ConQ] -> [DerivClauseQ] -> DecQ Source #

familyNoKindD :: FamFlavour -> Name -> [TyVarBndr] -> DecQ Source #

Deprecated: This function will be removed in the next stable release. Use openTypeFamilyD/dataFamilyD instead.

familyKindD :: FamFlavour -> Name -> [TyVarBndr] -> Kind -> DecQ Source #

Deprecated: This function will be removed in the next stable release. Use openTypeFamilyD/dataFamilyD instead.

closedTypeFamilyNoKindD :: Name -> [TyVarBndr] -> [TySynEqnQ] -> DecQ Source #

Deprecated: This function will be removed in the next stable release. Use closedTypeFamilyD instead.

closedTypeFamilyKindD :: Name -> [TyVarBndr] -> Kind -> [TySynEqnQ] -> DecQ Source #

Deprecated: This function will be removed in the next stable release. Use closedTypeFamilyD instead.

newtypeInstD :: CxtQ -> Name -> [TypeQ] -> Maybe Kind -> ConQ -> [DerivClauseQ] -> DecQ Source #

tySynInstD :: Name -> TySynEqnQ -> DecQ Source #

typeFam :: FamFlavour Source #

dataFam :: FamFlavour Source #

tySynEqn :: [TypeQ] -> TypeQ -> TySynEqnQ Source #

injectivityAnn :: Name -> [Name] -> InjectivityAnn Source #

noSig :: FamilyResultSig Source #

kindSig :: Kind -> FamilyResultSig Source #

tyVarSig :: TyVarBndr -> FamilyResultSig Source #

Fixity

infixLD :: Int -> Name -> DecQ Source #

infixRD :: Int -> Name -> DecQ Source #

infixND :: Int -> Name -> DecQ Source #

Foreign Function Interface (FFI)

cCall :: Callconv Source #

stdCall :: Callconv Source #

cApi :: Callconv Source #

prim :: Callconv Source #

javaScript :: Callconv Source #

unsafe :: Safety Source #

safe :: Safety Source #

interruptible :: Safety Source #

forImpD :: Callconv -> Safety -> String -> Name -> TypeQ -> DecQ Source #

Functional dependencies

funDep :: [Name] -> [Name] -> FunDep Source #

Pragmas

ruleVar :: Name -> RuleBndrQ Source #

typedRuleVar :: Name -> TypeQ -> RuleBndrQ Source #

valueAnnotation :: Name -> AnnTarget Source #

typeAnnotation :: Name -> AnnTarget Source #

moduleAnnotation :: AnnTarget Source #

pragInlD :: Name -> Inline -> RuleMatch -> Phases -> DecQ Source #

pragSpecD :: Name -> TypeQ -> Phases -> DecQ Source #

pragSpecInlD :: Name -> TypeQ -> Inline -> Phases -> DecQ Source #

pragSpecInstD :: TypeQ -> DecQ Source #

pragRuleD :: String -> [RuleBndrQ] -> ExpQ -> ExpQ -> Phases -> DecQ Source #

pragAnnD :: AnnTarget -> ExpQ -> DecQ Source #

pragLineD :: Int -> String -> DecQ Source #

pragCompleteD :: [Name] -> Maybe Name -> DecQ Source #

Pattern Synonyms

patSynD :: Name -> PatSynArgsQ -> PatSynDirQ -> PatQ -> DecQ Source #

Pattern synonym declaration

patSynSigD :: Name -> TypeQ -> DecQ Source #

Pattern synonym type signature

unidir :: PatSynDirQ Source #

implBidir :: PatSynDirQ Source #

explBidir :: [ClauseQ] -> PatSynDirQ Source #

prefixPatSyn :: [Name] -> PatSynArgsQ Source #

infixPatSyn :: Name -> Name -> PatSynArgsQ Source #

recordPatSyn :: [Name] -> PatSynArgsQ Source #

Reify

thisModule :: Q Module Source #

Return the Module at the place of splicing. Can be used as an input for reifyModule.