Safe Haskell	Safe-Inferred
Language	Haskell2010

GHC.Core.TyCo.Ppr

Contents

Precedence
Pretty-printing types
Pretty-printing coercions

Description

Pretty-printing types and coercions.

Synopsis

newtype PprPrec = PprPrec Int
topPrec :: PprPrec
sigPrec :: PprPrec
opPrec :: PprPrec
funPrec :: PprPrec
appPrec :: PprPrec
maybeParen :: PprPrec -> PprPrec -> SDoc -> SDoc
pprType :: Type -> SDoc
pprParendType :: Type -> SDoc
pprTidiedType :: Type -> SDoc
pprPrecType :: PprPrec -> Type -> SDoc
pprPrecTypeX :: TidyEnv -> PprPrec -> Type -> SDoc
pprTypeApp :: TyCon -> [Type] -> SDoc
pprTCvBndr :: TyCoVarBinder -> SDoc
pprTCvBndrs :: [TyCoVarBinder] -> SDoc
pprSigmaType :: Type -> SDoc
pprTheta :: ThetaType -> SDoc
pprParendTheta :: ThetaType -> SDoc
pprForAll :: [TyCoVarBinder] -> SDoc
pprUserForAll :: [TyCoVarBinder] -> SDoc
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
pprWithTYPE :: Type -> SDoc
pprSourceTyCon :: TyCon -> SDoc
pprCo :: Coercion -> SDoc
pprParendCo :: Coercion -> SDoc
debugPprType :: Type -> SDoc

Precedence

newtype PprPrec Source #

A general-purpose pretty-printing precedence type.

Constructors

PprPrec Int

Instances

Instances details

Show PprPrec Source #
Instance details Defined in GHC.Types.Basic Methods showsPrec :: Int -> PprPrec -> ShowS Source # show :: PprPrec -> String Source # showList :: [PprPrec] -> ShowS Source #
Eq PprPrec Source #
Instance details Defined in GHC.Types.Basic Methods (==) :: PprPrec -> PprPrec -> Bool # (/=) :: PprPrec -> PprPrec -> Bool #
Ord PprPrec Source #
Instance details 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 Source #

sigPrec :: PprPrec Source #

opPrec :: PprPrec Source #

funPrec :: PprPrec Source #

appPrec :: PprPrec Source #

maybeParen :: PprPrec -> PprPrec -> SDoc -> SDoc Source #

Pretty-printing types

pprType :: Type -> SDoc Source #

pprParendType :: Type -> SDoc Source #

pprTidiedType :: Type -> SDoc Source #

pprPrecType :: PprPrec -> Type -> SDoc Source #

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

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

pprTCvBndr :: TyCoVarBinder -> SDoc Source #

pprTCvBndrs :: [TyCoVarBinder] -> SDoc Source #

pprSigmaType :: Type -> SDoc Source #

pprTheta :: ThetaType -> SDoc Source #

pprParendTheta :: ThetaType -> SDoc Source #

pprForAll :: [TyCoVarBinder] -> SDoc Source #

pprUserForAll :: [TyCoVarBinder] -> SDoc Source #

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

pprTyVar :: TyVar -> SDoc Source #

pprTyVars :: [TyVar] -> SDoc Source #

pprThetaArrowTy :: ThetaType -> SDoc Source #

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

pprKind :: Kind -> SDoc Source #

pprParendKind :: Kind -> SDoc Source #

pprTyLit :: TyLit -> SDoc Source #

pprDataCons :: TyCon -> SDoc Source #

pprWithExplicitKindsWhen :: Bool -> SDoc -> SDoc Source #

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 Source #

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

pprSourceTyCon :: TyCon -> SDoc Source #

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 Source #

pprParendCo :: Coercion -> SDoc Source #

debugPprType :: Type -> SDoc Source #

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.