| Safe Haskell | None |
|---|
Language.Haskell.TH
Contents
Description
The public face of Template Haskell
For other documentation, refer to: http://www.haskell.org/haskellwiki/Template_Haskell
- 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
- data Info
- type InstanceDec = Dec
- type ParentName = Name
- type Arity = Int
- type Unlifted = Bool
- lookupTypeName :: String -> Q (Maybe Name)
- lookupValueName :: String -> Q (Maybe Name)
- reifyInstances :: Name -> [Type] -> Q [InstanceDec]
- isInstance :: Name -> [Type] -> Q Bool
- data Name
- data NameSpace
- mkName :: String -> Name
- newName :: String -> Q Name
- nameBase :: Name -> String
- nameModule :: Name -> Maybe String
- tupleTypeName :: Int -> Name
- tupleDataName :: Int -> Name
- unboxedTupleTypeName :: Int -> Name
- unboxedTupleDataName :: Int -> Name
- data Dec
- = FunD Name [Clause]
- | ValD Pat Body [Dec]
- | DataD Cxt Name [TyVarBndr] [Con] [Name]
- | NewtypeD Cxt Name [TyVarBndr] Con [Name]
- | TySynD Name [TyVarBndr] Type
- | ClassD Cxt Name [TyVarBndr] [FunDep] [Dec]
- | InstanceD Cxt Type [Dec]
- | SigD Name Type
- | ForeignD Foreign
- | InfixD Fixity Name
- | PragmaD Pragma
- | FamilyD FamFlavour Name [TyVarBndr] (Maybe Kind)
- | DataInstD Cxt Name [Type] [Con] [Name]
- | NewtypeInstD Cxt Name [Type] Con [Name]
- | TySynInstD Name [Type] Type
- data Con
- = NormalC Name [StrictType]
- | RecC Name [VarStrictType]
- | InfixC StrictType Name StrictType
- | ForallC [TyVarBndr] Cxt Con
- data Clause = Clause [Pat] Body [Dec]
- data Strict
- data Foreign
- data Callconv
- data Safety
- = Unsafe
- | Safe
- | Interruptible
- data Pragma
- data Inline
- data RuleMatch
- data Phases
- = AllPhases
- | FromPhase Int
- | BeforePhase Int
- data RuleBndr
- = RuleVar Name
- | TypedRuleVar Name Type
- data FunDep = FunDep [Name] [Name]
- data FamFlavour
- data Fixity = Fixity Int FixityDirection
- data FixityDirection
- defaultFixity :: Fixity
- maxPrecedence :: Int
- data Exp
- = VarE Name
- | ConE Name
- | LitE Lit
- | AppE Exp Exp
- | InfixE (Maybe Exp) Exp (Maybe Exp)
- | UInfixE Exp Exp Exp
- | ParensE Exp
- | LamE [Pat] Exp
- | LamCaseE [Match]
- | TupE [Exp]
- | UnboxedTupE [Exp]
- | CondE Exp Exp Exp
- | MultiIfE [(Guard, Exp)]
- | LetE [Dec] Exp
- | CaseE Exp [Match]
- | DoE [Stmt]
- | CompE [Stmt]
- | ArithSeqE Range
- | ListE [Exp]
- | SigE Exp Type
- | RecConE Name [FieldExp]
- | RecUpdE Exp [FieldExp]
- 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
- data TyVarBndr
- data TyLit
- type Kind = Type
- type Cxt = [Pred]
- data Pred
- type InfoQ = Q Info
- type ExpQ = Q Exp
- type DecQ = Q Dec
- type DecsQ = Q [Dec]
- type ConQ = Q Con
- type TypeQ = Q Type
- type TyLitQ = Q TyLit
- type CxtQ = Q Cxt
- type PredQ = Q Pred
- type MatchQ = Q Match
- type ClauseQ = Q Clause
- type BodyQ = Q Body
- type GuardQ = Q Guard
- type StmtQ = Q Stmt
- type RangeQ = Q Range
- type StrictTypeQ = Q StrictType
- type VarStrictTypeQ = Q VarStrictType
- type PatQ = Q Pat
- type FieldPatQ = Q FieldPat
- type RuleBndrQ = Q RuleBndr
- intPrimL :: Integer -> Lit
- wordPrimL :: Integer -> Lit
- floatPrimL :: Rational -> Lit
- doublePrimL :: Rational -> Lit
- integerL :: Integer -> Lit
- rationalL :: Rational -> Lit
- charL :: Char -> Lit
- stringL :: String -> Lit
- stringPrimL :: [Word8] -> Lit
- litP :: Lit -> PatQ
- varP :: Name -> PatQ
- tupP :: [PatQ] -> PatQ
- conP :: Name -> [PatQ] -> PatQ
- uInfixP :: PatQ -> Name -> PatQ -> PatQ
- parensP :: PatQ -> PatQ
- infixP :: PatQ -> Name -> PatQ -> PatQ
- tildeP :: PatQ -> PatQ
- bangP :: PatQ -> PatQ
- asP :: Name -> PatQ -> PatQ
- wildP :: PatQ
- recP :: Name -> [FieldPatQ] -> PatQ
- listP :: [PatQ] -> PatQ
- sigP :: PatQ -> TypeQ -> PatQ
- viewP :: ExpQ -> PatQ -> PatQ
- fieldPat :: Name -> PatQ -> FieldPatQ
- normalB :: ExpQ -> BodyQ
- guardedB :: [Q (Guard, Exp)] -> BodyQ
- normalG :: ExpQ -> GuardQ
- normalGE :: ExpQ -> ExpQ -> Q (Guard, Exp)
- patG :: [StmtQ] -> GuardQ
- patGE :: [StmtQ] -> ExpQ -> Q (Guard, Exp)
- match :: PatQ -> BodyQ -> [DecQ] -> MatchQ
- clause :: [PatQ] -> BodyQ -> [DecQ] -> ClauseQ
- dyn :: String -> Q Exp
- global :: Name -> ExpQ
- varE :: Name -> ExpQ
- conE :: Name -> ExpQ
- litE :: Lit -> ExpQ
- appE :: ExpQ -> ExpQ -> ExpQ
- uInfixE :: ExpQ -> ExpQ -> ExpQ -> ExpQ
- parensE :: ExpQ -> ExpQ
- infixE :: Maybe ExpQ -> ExpQ -> Maybe ExpQ -> ExpQ
- infixApp :: ExpQ -> ExpQ -> ExpQ -> ExpQ
- sectionL :: ExpQ -> ExpQ -> ExpQ
- sectionR :: ExpQ -> ExpQ -> ExpQ
- lamE :: [PatQ] -> ExpQ -> ExpQ
- lam1E :: PatQ -> ExpQ -> ExpQ
- lamCaseE :: [MatchQ] -> ExpQ
- tupE :: [ExpQ] -> ExpQ
- condE :: ExpQ -> ExpQ -> ExpQ -> ExpQ
- multiIfE :: [Q (Guard, Exp)] -> ExpQ
- letE :: [DecQ] -> ExpQ -> ExpQ
- caseE :: ExpQ -> [MatchQ] -> ExpQ
- appsE :: [ExpQ] -> ExpQ
- listE :: [ExpQ] -> ExpQ
- sigE :: ExpQ -> TypeQ -> ExpQ
- recConE :: Name -> [Q (Name, Exp)] -> ExpQ
- recUpdE :: ExpQ -> [Q (Name, Exp)] -> ExpQ
- stringE :: String -> ExpQ
- fieldExp :: Name -> ExpQ -> Q (Name, Exp)
- fromE :: ExpQ -> ExpQ
- fromThenE :: ExpQ -> ExpQ -> ExpQ
- fromToE :: ExpQ -> ExpQ -> ExpQ
- fromThenToE :: ExpQ -> ExpQ -> ExpQ -> ExpQ
- arithSeqE :: RangeQ -> ExpQ
- fromR :: ExpQ -> RangeQ
- fromThenR :: ExpQ -> ExpQ -> RangeQ
- fromToR :: ExpQ -> ExpQ -> RangeQ
- fromThenToR :: ExpQ -> ExpQ -> ExpQ -> RangeQ
- doE :: [StmtQ] -> ExpQ
- compE :: [StmtQ] -> ExpQ
- bindS :: PatQ -> ExpQ -> StmtQ
- letS :: [DecQ] -> StmtQ
- noBindS :: ExpQ -> StmtQ
- parS :: [[StmtQ]] -> StmtQ
- forallT :: [TyVarBndr] -> CxtQ -> TypeQ -> TypeQ
- varT :: Name -> TypeQ
- conT :: Name -> TypeQ
- appT :: TypeQ -> TypeQ -> TypeQ
- arrowT :: TypeQ
- listT :: TypeQ
- tupleT :: Int -> TypeQ
- sigT :: TypeQ -> Kind -> TypeQ
- litT :: TyLitQ -> TypeQ
- promotedT :: Name -> TypeQ
- promotedTupleT :: Int -> TypeQ
- promotedNilT :: TypeQ
- promotedConsT :: TypeQ
- numTyLit :: Integer -> TyLitQ
- strTyLit :: String -> TyLitQ
- isStrict :: Q Strict
- notStrict :: Q Strict
- strictType :: Q Strict -> TypeQ -> StrictTypeQ
- varStrictType :: Name -> StrictTypeQ -> VarStrictTypeQ
- cxt :: [PredQ] -> CxtQ
- classP :: Name -> [TypeQ] -> PredQ
- equalP :: TypeQ -> TypeQ -> PredQ
- normalC :: Name -> [StrictTypeQ] -> ConQ
- recC :: Name -> [VarStrictTypeQ] -> ConQ
- infixC :: Q (Strict, Type) -> Name -> Q (Strict, Type) -> ConQ
- forallC :: [TyVarBndr] -> CxtQ -> ConQ -> ConQ
- varK :: Name -> Kind
- conK :: Name -> Kind
- tupleK :: Int -> Kind
- arrowK :: Kind
- listK :: Kind
- appK :: Kind -> Kind -> Kind
- starK :: Kind
- constraintK :: Kind
- valD :: PatQ -> BodyQ -> [DecQ] -> DecQ
- funD :: Name -> [ClauseQ] -> DecQ
- tySynD :: Name -> [TyVarBndr] -> TypeQ -> DecQ
- dataD :: CxtQ -> Name -> [TyVarBndr] -> [ConQ] -> [Name] -> DecQ
- newtypeD :: CxtQ -> Name -> [TyVarBndr] -> ConQ -> [Name] -> DecQ
- classD :: CxtQ -> Name -> [TyVarBndr] -> [FunDep] -> [DecQ] -> DecQ
- instanceD :: CxtQ -> TypeQ -> [DecQ] -> DecQ
- sigD :: Name -> TypeQ -> DecQ
- familyNoKindD :: FamFlavour -> Name -> [TyVarBndr] -> DecQ
- familyKindD :: FamFlavour -> Name -> [TyVarBndr] -> Kind -> DecQ
- dataInstD :: CxtQ -> Name -> [TypeQ] -> [ConQ] -> [Name] -> DecQ
- newtypeInstD :: CxtQ -> Name -> [TypeQ] -> ConQ -> [Name] -> DecQ
- tySynInstD :: Name -> [TypeQ] -> TypeQ -> DecQ
- typeFam :: FamFlavour
- dataFam :: FamFlavour
- cCall :: Callconv
- stdCall :: Callconv
- unsafe :: Safety
- safe :: Safety
- forImpD :: Callconv -> Safety -> String -> Name -> TypeQ -> DecQ
- ruleVar :: Name -> RuleBndrQ
- typedRuleVar :: Name -> TypeQ -> RuleBndrQ
- pragInlD :: Name -> Inline -> RuleMatch -> Phases -> DecQ
- pragSpecD :: Name -> TypeQ -> Phases -> DecQ
- pragSpecInlD :: Name -> TypeQ -> Inline -> Phases -> DecQ
- pragSpecInstD :: TypeQ -> DecQ
- pragRuleD :: String -> [RuleBndrQ] -> ExpQ -> ExpQ -> Phases -> DecQ
- 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
Administration: errors, locations and IO
reportError :: String -> Q ()
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 ()
Report a warning to the user, and carry on.
report :: Bool -> String -> Q ()
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.
data Loc
Constructors
| Loc | |
Fields
| |
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 necesarily flushed when the compiler finishes running, so you should flush them yourself.
Querying the compiler
Reify
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.
data Info
Constructors
| ClassI Dec [InstanceDec] | A class, with a list of its visible instances |
| ClassOpI Name Type ParentName Fixity | 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 |
| PrimTyConI Name Arity Unlifted | A "primitive" type constructor, which can't be expressed with a |
| DataConI Name Type ParentName Fixity | A data constructor |
| VarI Name Type (Maybe Dec) Fixity | A "value" variable (as opposed to a type variable, see The |
| TyVarI Name Type | A type variable. The |
type InstanceDec = Dec
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
type ParentName = Name
In PrimTyConI, arity of the type constructor
In PrimTyConI, is the type constructor unlifted?
Name lookup
lookupTypeName :: String -> Q (Maybe Name)
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)
Look up the given name in the (value namespace of the) current splice's scope. See Language.Haskell.TH.Syntax for more details.
Instance lookup
reifyInstances :: Name -> [Type] -> Q [InstanceDec]
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.
isInstance :: Name -> [Type] -> Q Bool
Is the list of instances returned by reifyInstances nonempty?
Names
data Name
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.
Constructing names
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") |]
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 = $(do nm1 <- newName "x" let nm2 = mkName "x" return (LamE [VarP nm2] (LamE [VarP nm1] (VarE nm2))) )
will produce the splice
g = \x -> \x0 -> x0
since the occurrence VarE nm2 is captured by the innermost binding
of x, namely VarP nm1.
Deconstructing names
nameModule :: Name -> Maybe String
Module prefix of a name, if it exists
Built-in names
tupleTypeName :: Int -> Name
Tuple type constructor
tupleDataName :: Int -> Name
Tuple data constructor
unboxedTupleTypeName :: Int -> Name
Unboxed tuple type constructor
unboxedTupleDataName :: Int -> Name
Unboxed tuple data constructor
The algebraic data types
The lowercase versions (syntax operators) of these constructors are
preferred to these constructors, since they compose better with
quotations ([| |]) and splices ($( ... ))
Declarations
data Dec
Constructors
| FunD Name [Clause] | { f p1 p2 = b where decs } |
| ValD Pat Body [Dec] | { p = b where decs } |
| DataD Cxt Name [TyVarBndr] [Con] [Name] | { data Cxt x => T x = A x | B (T x)
deriving (Z,W)} |
| NewtypeD Cxt Name [TyVarBndr] Con [Name] | { newtype Cxt x => T x = A (B x)
deriving (Z,W)} |
| TySynD Name [TyVarBndr] Type | { type T x = (x,x) } |
| ClassD Cxt Name [TyVarBndr] [FunDep] [Dec] | { class Eq a => Ord a where ds } |
| InstanceD Cxt Type [Dec] | { instance Show w => Show [w]
where ds } |
| SigD Name Type | { length :: [a] -> Int } |
| ForeignD Foreign | { foreign import ... }
{ foreign export ... } |
| InfixD Fixity Name | { infix 3 foo } |
| PragmaD Pragma | { {--} } |
| FamilyD FamFlavour Name [TyVarBndr] (Maybe Kind) | { type family T a b c :: * } |
| DataInstD Cxt Name [Type] [Con] [Name] | { data instance Cxt x => T [x] = A x
| B (T x)
deriving (Z,W)} |
| NewtypeInstD Cxt Name [Type] Con [Name] | { newtype instance Cxt x => T [x] = A (B x)
deriving (Z,W)} |
| TySynInstD Name [Type] Type | { type instance T (Maybe x) = (x,x) } |
data Con
Constructors
| NormalC Name [StrictType] | C Int a |
| RecC Name [VarStrictType] | C { v :: Int, w :: a } |
| InfixC StrictType Name StrictType | Int :+ a |
| ForallC [TyVarBndr] Cxt Con | forall a. Eq a => C [a] |
data Clause
data Strict
data Foreign
data Callconv
data Safety
Constructors
| Unsafe | |
| Safe | |
| Interruptible |
data Pragma
data Inline
data RuleMatch
data FunDep
data FamFlavour
Instances
data Fixity
Constructors
| Fixity Int FixityDirection |
data FixityDirection
Default fixity: infixl 9
maxPrecedence :: Int
Highest allowed operator precedence for Fixity constructor (answer: 9)
Expressions
data Exp
Constructors
| VarE Name | { x } |
| ConE Name | data T1 = C1 t1 t2; p = {C1} e1 e2 |
| LitE Lit | { 5 or |
| AppE Exp Exp | { f x } |
| 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 [Exp] | { (e1,e2) } |
| UnboxedTupE [Exp] | { () } |
| 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 } } |
| 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 } } |
data Match
data Body
data Guard
data Stmt
data Range
data Lit
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 Addr# |
Patterns
data Pat
Pattern in Haskell given in {}
Constructors
| LitP Lit | { 5 or |
| VarP Name | { x } |
| TupP [Pat] | { (p1,p2) } |
| UnboxedTupP [Pat] | { () } |
| 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 } |
Types
data Type
Constructors
| ForallT [TyVarBndr] Cxt Type | forall <vars>. <ctxt> -> <type> |
| AppT Type Type | T a b |
| SigT Type Kind | t :: k |
| VarT Name | a |
| ConT Name | T |
| PromotedT Name | 'T |
| TupleT Int | (,), (,,), etc. |
| UnboxedTupleT Int | (), (), etc. |
| ArrowT | -> |
| ListT | [] |
| PromotedTupleT Int | '(), '(,), '(,,), etc. |
| PromotedNilT | '[] |
| PromotedConsT | (':) |
| StarT | * |
| ConstraintT | Constraint |
| LitT TyLit | 0,1,2, etc. |
data TyVarBndr
data TyLit
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.
data Pred
Library functions
Abbreviations
type StrictTypeQ = Q StrictType
type VarStrictTypeQ = Q VarStrictType
Constructors lifted to Q
Literals
floatPrimL :: Rational -> Lit
doublePrimL :: Rational -> Lit
stringPrimL :: [Word8] -> Lit
Patterns
Pattern Guards
Expressions
Ranges
fromThenToE :: ExpQ -> ExpQ -> ExpQ -> ExpQ
Ranges with more indirection
fromThenToR :: ExpQ -> ExpQ -> ExpQ -> RangeQ
Statements
Types
promotedTupleT :: Int -> TypeQ
Type literals
Strictness
strictType :: Q Strict -> TypeQ -> StrictTypeQ
varStrictType :: Name -> StrictTypeQ -> VarStrictTypeQ
Class Contexts
normalC :: Name -> [StrictTypeQ] -> ConQ
recC :: Name -> [VarStrictTypeQ] -> ConQ
Kinds
constraintK :: Kind
Top Level Declarations
Data
Class
Type Family / Data Family
familyNoKindD :: FamFlavour -> Name -> [TyVarBndr] -> DecQ
familyKindD :: FamFlavour -> Name -> [TyVarBndr] -> Kind -> DecQ
tySynInstD :: Name -> [TypeQ] -> TypeQ -> DecQ
Foreign Function Interface (FFI)
Pragmas
typedRuleVar :: Name -> TypeQ -> RuleBndrQ
pragSpecInstD :: TypeQ -> DecQ
Pretty-printer
class Ppr a where
pprExp :: Precedence -> Exp -> Doc
pprLit :: Precedence -> Lit -> Doc
pprPat :: Precedence -> Pat -> Doc
pprParendType :: Type -> Doc