GHC.Core.TyCo.Ppr

Pretty-printing types and coercions.

Precedence

newtype PprPrec

A general-purpose pretty-printing precedence type.

Constructors

PprPrec Int

Instances

Show PprPrec

Defined in GHC.Types.Basic

Methods

showsPrec :: Int -> PprPrec -> ShowS

show :: PprPrec -> String

showList :: [PprPrec] -> ShowS

Eq PprPrec

Defined in GHC.Types.Basic

Methods

(==) :: PprPrec -> PprPrec -> Bool

(/=) :: PprPrec -> PprPrec -> Bool

Ord PprPrec

Defined in GHC.Types.Basic

Methods

compare :: PprPrec -> PprPrec -> Ordering

(<) :: PprPrec -> PprPrec -> Bool

(<=) :: PprPrec -> PprPrec -> Bool

(>) :: PprPrec -> PprPrec -> Bool

(>=) :: PprPrec -> PprPrec -> Bool

max :: PprPrec -> PprPrec -> PprPrec

min :: PprPrec -> PprPrec -> PprPrec

topPrec :: PprPrec

sigPrec :: PprPrec

opPrec :: PprPrec

funPrec :: PprPrec

appPrec :: PprPrec

maybeParen :: PprPrec -> PprPrec -> SDoc -> SDoc

Pretty-printing types

pprType :: Type -> SDoc

pprParendType :: Type -> SDoc

pprTidiedType :: Type -> SDoc

pprPrecType :: PprPrec -> Type -> SDoc

pprPrecTypeX :: TidyEnv -> PprPrec -> Type -> SDoc

pprTypeApp :: TyCon -> [Type] -> SDoc

pprTCvBndr :: ForAllTyBinder -> SDoc

pprTCvBndrs :: [ForAllTyBinder] -> SDoc

pprSigmaType :: Type -> SDoc

pprTheta :: ThetaType -> SDoc

pprParendTheta :: ThetaType -> SDoc

pprForAll :: [ForAllTyBinder] -> SDoc

pprUserForAll :: [ForAllTyBinder] -> SDoc

Print a user-level forall; see Note [When to print foralls] in GHC.Iface.Type.

pprTyVar :: TyVar -> SDoc

pprTyVars :: [TyVar] -> SDoc

pprThetaArrowTy :: ThetaType -> SDoc

pprClassPred :: Class -> [Type] -> SDoc

pprKind :: Kind -> SDoc

pprParendKind :: Kind -> SDoc

pprTyLit :: TyLit -> SDoc

pprDataCons :: TyCon -> SDoc

pprWithExplicitKindsWhen :: Bool -> SDoc -> SDoc

Display all kind information (with -fprint-explicit-kinds) when the provided Bool argument is True. See Note [Kind arguments in error messages] in GHC.Tc.Errors.

pprWithTYPE :: Type -> SDoc

This variant preserves any use of TYPE in a type, effectively locally setting -fprint-explicit-runtime-reps.

pprSourceTyCon :: TyCon -> SDoc

Pretty prints a TyCon, using the family instance in case of a representation tycon. For example:

data T [a] = ...

In that case we want to print T [a], where T is the family TyCon

Pretty-printing coercions

pprCo :: Coercion -> SDoc

pprParendCo :: Coercion -> SDoc

debugPprType :: Type -> SDoc

debugPprType is a simple pretty printer that prints a type without going through IfaceType. It does not format as prettily as the normal route, but it's much more direct, and that can be useful for debugging. E.g. with -dppr-debug it prints the kind on type-variable occurrences which the normal route fundamentally cannot do.