template-haskell-2.17.0.0: Support library for Template Haskell
Safe HaskellSafe
LanguageHaskell2010

Language.Haskell.TH.Lib

Description

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

Synopsis

Library functions

Abbreviations

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 CxtQ = Q Cxt Source #

type PatQ = Q Pat Source #

Constructors lifted to Q

Literals

mkBytes Source #

Arguments

:: ForeignPtr Word8

Pointer to the data

-> Word

Offset from the pointer

-> Word

Number of bytes

-> Bytes 

Create a Bytes datatype representing raw bytes to be embedded into the program/library binary.

Since: template-haskell-2.16.0.0

Patterns

litP :: Quote m => Lit -> m Pat Source #

varP :: Quote m => Name -> m Pat Source #

tupP :: Quote m => [m Pat] -> m Pat Source #

unboxedTupP :: Quote m => [m Pat] -> m Pat Source #

conP :: Quote m => Name -> [m Pat] -> m Pat Source #

uInfixP :: Quote m => m Pat -> Name -> m Pat -> m Pat Source #

parensP :: Quote m => m Pat -> m Pat Source #

infixP :: Quote m => m Pat -> Name -> m Pat -> m Pat Source #

tildeP :: Quote m => m Pat -> m Pat Source #

bangP :: Quote m => m Pat -> m Pat Source #

asP :: Quote m => Name -> m Pat -> m Pat Source #

wildP :: Quote m => m Pat Source #

recP :: Quote m => Name -> [m FieldPat] -> m Pat Source #

listP :: Quote m => [m Pat] -> m Pat Source #

sigP :: Quote m => m Pat -> m Type -> m Pat Source #

viewP :: Quote m => m Exp -> m Pat -> m Pat Source #

fieldPat :: Quote m => Name -> m Pat -> m FieldPat Source #

Pattern Guards

normalB :: Quote m => m Exp -> m Body Source #

guardedB :: Quote m => [m (Guard, Exp)] -> m Body Source #

normalG :: Quote m => m Exp -> m Guard Source #

normalGE :: Quote m => m Exp -> m Exp -> m (Guard, Exp) Source #

patG :: Quote m => [m Stmt] -> m Guard Source #

patGE :: Quote m => [m Stmt] -> m Exp -> m (Guard, Exp) Source #

match :: Quote m => m Pat -> m Body -> [m Dec] -> m Match Source #

Use with caseE

clause :: Quote m => [m Pat] -> m Body -> [m Dec] -> m Clause Source #

Use with funD

Expressions

dyn :: Quote m => String -> m Exp Source #

Dynamically binding a variable (unhygenic)

varE :: Quote m => Name -> m Exp Source #

labelE :: Quote m => String -> m Exp Source #

conE :: Quote m => Name -> m Exp Source #

litE :: Quote m => Lit -> m Exp Source #

staticE :: Quote m => m Exp -> m Exp Source #

staticE x = [| static x |]

appE :: Quote m => m Exp -> m Exp -> m Exp Source #

appTypeE :: Quote m => m Exp -> m Type -> m Exp Source #

uInfixE :: Quote m => m Exp -> m Exp -> m Exp -> m Exp Source #

parensE :: Quote m => m Exp -> m Exp Source #

infixE :: Quote m => Maybe (m Exp) -> m Exp -> Maybe (m Exp) -> m Exp Source #

infixApp :: Quote m => m Exp -> m Exp -> m Exp -> m Exp Source #

sectionL :: Quote m => m Exp -> m Exp -> m Exp Source #

sectionR :: Quote m => m Exp -> m Exp -> m Exp Source #

lamE :: Quote m => [m Pat] -> m Exp -> m Exp Source #

lam1E :: Quote m => m Pat -> m Exp -> m Exp Source #

Single-arg lambda

lamCaseE :: Quote m => [m Match] -> m Exp Source #

tupE :: Quote m => [m Exp] -> m Exp Source #

unboxedTupE :: Quote m => [m Exp] -> m Exp Source #

condE :: Quote m => m Exp -> m Exp -> m Exp -> m Exp Source #

multiIfE :: Quote m => [m (Guard, Exp)] -> m Exp Source #

letE :: Quote m => [m Dec] -> m Exp -> m Exp Source #

caseE :: Quote m => m Exp -> [m Match] -> m Exp Source #

appsE :: Quote m => [m Exp] -> m Exp Source #

listE :: Quote m => [m Exp] -> m Exp Source #

sigE :: Quote m => m Exp -> m Type -> m Exp Source #

recConE :: Quote m => Name -> [m (Name, Exp)] -> m Exp Source #

recUpdE :: Quote m => m Exp -> [m (Name, Exp)] -> m Exp Source #

fieldExp :: Quote m => Name -> m Exp -> m (Name, Exp) Source #

Ranges

fromE :: Quote m => m Exp -> m Exp Source #

fromThenE :: Quote m => m Exp -> m Exp -> m Exp Source #

fromToE :: Quote m => m Exp -> m Exp -> m Exp Source #

fromThenToE :: Quote m => m Exp -> m Exp -> m Exp -> m Exp Source #

Ranges with more indirection

arithSeqE :: Quote m => m Range -> m Exp Source #

fromR :: Quote m => m Exp -> m Range Source #

fromThenR :: Quote m => m Exp -> m Exp -> m Range Source #

fromToR :: Quote m => m Exp -> m Exp -> m Range Source #

fromThenToR :: Quote m => m Exp -> m Exp -> m Exp -> m Range Source #

Statements

doE :: Quote m => [m Stmt] -> m Exp Source #

mdoE :: Quote m => [m Stmt] -> m Exp Source #

compE :: Quote m => [m Stmt] -> m Exp Source #

bindS :: Quote m => m Pat -> m Exp -> m Stmt Source #

letS :: Quote m => [m Dec] -> m Stmt Source #

noBindS :: Quote m => m Exp -> m Stmt Source #

parS :: Quote m => [[m Stmt]] -> m Stmt Source #

recS :: Quote m => [m Stmt] -> m Stmt Source #

Types

forallVisT :: Quote m => [m (TyVarBndr ())] -> m Type -> m Type Source #

varT :: Quote m => Name -> m Type Source #

conT :: Quote m => Name -> m Type Source #

appT :: Quote m => m Type -> m Type -> m Type Source #

appKindT :: Quote m => m Type -> m Kind -> m Type Source #

infixT :: Quote m => m Type -> Name -> m Type -> m Type Source #

uInfixT :: Quote m => m Type -> Name -> m Type -> m Type Source #

parensT :: Quote m => m Type -> m Type Source #

listT :: Quote m => m Type Source #

tupleT :: Quote m => Int -> m Type Source #

sigT :: Quote m => m Type -> Kind -> m Type Source #

litT :: Quote m => m TyLit -> m Type Source #

Type literals

Strictness

isStrict :: Quote m => m Strict Source #

Deprecated: Use bang. See https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.0. Example usage: 'bang noSourceUnpackedness sourceStrict'

notStrict :: Quote m => m Strict Source #

Deprecated: Use bang. See https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.0. Example usage: 'bang noSourceUnpackedness noSourceStrictness'

unpacked :: Quote m => m Strict Source #

Deprecated: Use bang. See https://gitlab.haskell.org/ghc/ghc/wikis/migration/8.0. Example usage: 'bang sourceUnpack sourceStrict'

bangType :: Quote m => m Bang -> m Type -> m BangType Source #

strictType :: Quote m => m Strict -> m Type -> m StrictType Source #

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

varStrictType :: Quote m => Name -> m StrictType -> m VarStrictType Source #

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

Class Contexts

cxt :: Quote m => [m Pred] -> m Cxt Source #

classP :: Quote m => Name -> [m Type] -> m 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 :: Quote m => m Type -> m Type -> m Pred Source #

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

Constructors

normalC :: Quote m => Name -> [m BangType] -> m Con Source #

recC :: Quote m => Name -> [m VarBangType] -> m Con Source #

infixC :: Quote m => m (Bang, Type) -> Name -> m (Bang, Type) -> m Con Source #

forallC :: Quote m => [TyVarBndr Specificity] -> m Cxt -> m Con -> m Con Source #

gadtC :: Quote m => [Name] -> [m StrictType] -> m Type -> m Con Source #

recGadtC :: Quote m => [Name] -> [m VarStrictType] -> m Type -> m Con Source #

Kinds

Type variable binders

Roles

Top Level Declarations

Data

valD :: Quote m => m Pat -> m Body -> [m Dec] -> m Dec Source #

funD :: Quote m => Name -> [m Clause] -> m Dec Source #

tySynD :: Quote m => Name -> [TyVarBndr ()] -> m Type -> m Dec Source #

dataD :: Quote m => m Cxt -> Name -> [TyVarBndr ()] -> Maybe Kind -> [m Con] -> [m DerivClause] -> m Dec Source #

newtypeD :: Quote m => m Cxt -> Name -> [TyVarBndr ()] -> Maybe Kind -> m Con -> [m DerivClause] -> m Dec Source #

data DerivClause Source #

A single deriving clause at the end of a datatype.

Constructors

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

Instances

Instances details
Eq DerivClause # 
Instance details

Defined in Language.Haskell.TH.Syntax

Data DerivClause # 
Instance details

Defined in Language.Haskell.TH.Syntax

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 :: forall r r'. (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 # 
Instance details

Defined in Language.Haskell.TH.Syntax

Show DerivClause # 
Instance details

Defined in Language.Haskell.TH.Syntax

Generic DerivClause # 
Instance details

Defined in Language.Haskell.TH.Syntax

Associated Types

type Rep DerivClause :: Type -> Type Source #

type Rep DerivClause # 
Instance details

Defined in Language.Haskell.TH.Syntax

data DerivStrategy Source #

What the user explicitly requests when deriving an instance.

Constructors

StockStrategy

A "standard" derived instance

AnyclassStrategy
-XDeriveAnyClass
NewtypeStrategy
-XGeneralizedNewtypeDeriving
ViaStrategy Type
-XDerivingVia

Instances

Instances details
Eq DerivStrategy # 
Instance details

Defined in Language.Haskell.TH.Syntax

Data DerivStrategy # 
Instance details

Defined in Language.Haskell.TH.Syntax

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 :: forall r r'. (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 # 
Instance details

Defined in Language.Haskell.TH.Syntax

Show DerivStrategy # 
Instance details

Defined in Language.Haskell.TH.Syntax

Generic DerivStrategy # 
Instance details

Defined in Language.Haskell.TH.Syntax

Associated Types

type Rep DerivStrategy :: Type -> Type Source #

type Rep DerivStrategy # 
Instance details

Defined in Language.Haskell.TH.Syntax

type Rep DerivStrategy = D1 ('MetaData "DerivStrategy" "Language.Haskell.TH.Syntax" "template-haskell" 'False) ((C1 ('MetaCons "StockStrategy" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AnyclassStrategy" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NewtypeStrategy" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ViaStrategy" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type))))

Class

classD :: Quote m => m Cxt -> Name -> [TyVarBndr ()] -> [FunDep] -> [m Dec] -> m Dec Source #

instanceD :: Quote m => m Cxt -> m Type -> [m Dec] -> m Dec Source #

instanceWithOverlapD :: Quote m => Maybe Overlap -> m Cxt -> m Type -> [m Dec] -> m Dec 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

Instances details
Eq Overlap # 
Instance details

Defined in Language.Haskell.TH.Syntax

Data Overlap # 
Instance details

Defined in Language.Haskell.TH.Syntax

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 :: forall r r'. (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 # 
Instance details

Defined in Language.Haskell.TH.Syntax

Show Overlap # 
Instance details

Defined in Language.Haskell.TH.Syntax

Generic Overlap # 
Instance details

Defined in Language.Haskell.TH.Syntax

Associated Types

type Rep Overlap :: Type -> Type Source #

type Rep Overlap # 
Instance details

Defined in Language.Haskell.TH.Syntax

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

sigD :: Quote m => Name -> m Type -> m Dec Source #

kiSigD :: Quote m => Name -> m Kind -> m Dec Source #

standaloneDerivD :: Quote m => m Cxt -> m Type -> m Dec Source #

defaultSigD :: Quote m => Name -> m Type -> m Dec Source #

Role annotations

roleAnnotD :: Quote m => Name -> [Role] -> m Dec Source #

Type Family / Data Family

dataFamilyD :: Quote m => Name -> [TyVarBndr ()] -> Maybe Kind -> m Dec Source #

dataInstD :: Quote m => m Cxt -> Name -> [m Type] -> Maybe Kind -> [m Con] -> [m DerivClause] -> m Dec Source #

newtypeInstD :: Quote m => m Cxt -> Name -> [m Type] -> Maybe Kind -> m Con -> [m DerivClause] -> m Dec Source #

tySynEqn :: Quote m => Maybe [TyVarBndr ()] -> m Type -> m Type -> m TySynEqn Source #

Fixity

infixLD :: Quote m => Int -> Name -> m Dec Source #

infixRD :: Quote m => Int -> Name -> m Dec Source #

infixND :: Quote m => Int -> Name -> m Dec Source #

Foreign Function Interface (FFI)

forImpD :: Quote m => Callconv -> Safety -> String -> Name -> m Type -> m Dec Source #

Functional dependencies

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

Pragmas

pragSpecD :: Quote m => Name -> m Type -> Phases -> m Dec Source #

pragSpecInlD :: Quote m => Name -> m Type -> Inline -> Phases -> m Dec Source #

pragRuleD :: Quote m => String -> [m RuleBndr] -> m Exp -> m Exp -> Phases -> m Dec Source #

pragAnnD :: Quote m => AnnTarget -> m Exp -> m Dec Source #

pragLineD :: Quote m => Int -> String -> m Dec Source #

Pattern Synonyms

patSynD :: Quote m => Name -> m PatSynArgs -> m PatSynDir -> m Pat -> m Dec Source #

Pattern synonym declaration

patSynSigD :: Quote m => Name -> m Type -> m Dec Source #

Pattern synonym type signature

Implicit Parameters

implicitParamBindD :: Quote m => String -> m Exp -> m Dec Source #

Implicit parameter binding declaration. Can only be used in let and where clauses which consist entirely of implicit bindings.

Reify

thisModule :: Q Module Source #

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