#include "HsVersions.h"
module PprType(
- GenTyVar, pprGenTyVar,
+ GenTyVar, pprGenTyVar, pprTyVarBndr,
TyCon, pprTyCon, showTyCon,
GenType,
pprGenType, pprParendGenType,
pprType, pprParendType,
pprMaybeTy,
getTypeString,
- typeMaybeString,
specMaybeTysSuffix,
getTyDescription,
GenClass,
-- friends:
-- (PprType can see all the representations it's trying to print)
import Type ( GenType(..), maybeAppTyCon,
- splitForAllTy, splitSigmaTy, splitRhoTy, splitAppTy )
+ splitForAllTy, splitSigmaTy, splitRhoTy, splitAppTys )
import TyVar ( GenTyVar(..) )
import TyCon ( TyCon(..), NewOrData )
import Class ( SYN_IE(Class), GenClass(..),
SYN_IE(ClassOp), GenClassOp(..) )
-import Kind ( Kind(..) )
+import Kind ( Kind(..), isBoxedTypeKind, pprParendKind )
import Usage ( pprUVar, GenUsage(..), SYN_IE(Usage), SYN_IE(UVar) )
-- others:
import CStrings ( identToC )
import CmdLineOpts ( opt_OmitInterfacePragmas )
import Maybes ( maybeToBool )
-import Name ( isLexVarSym, isLexSpecialSym, origName, moduleOf,
- getLocalName, Name{-instance Outputable-}
+import Name ( nameString, Name{-instance Outputable-},
+ OccName, pprOccName, getOccString, pprNonSymOcc
)
import Outputable ( ifPprShowAll, interpp'SP )
import PprEnv
import PprStyle ( PprStyle(..), codeStyle, showUserishTypes )
import Pretty
import UniqFM ( addToUFM_Directly, lookupUFM_Directly{-, ufmToList ToDo:rm-} )
-import Unique ( pprUnique10, pprUnique, incrUnique, listTyConKey )
+import Unique --TEMP: ( pprUnique10, pprUnique, incrUnique, listTyConKey )
import Util
\end{code}
%* *
%************************************************************************
+Precedence
+~~~~~~~~~~
+@ppr_ty@ takes an @Int@ that is the precedence of the context.
+The precedence levels are:
+\begin{description}
+\item[tOP_PREC] No parens required.
+\item[fUN_PREC] Left hand argument of a function arrow.
+\item[tYCON_PREC] Argument of a type constructor.
+\end{description}
+
+
+\begin{code}
+tOP_PREC = (0 :: Int)
+fUN_PREC = (1 :: Int)
+tYCON_PREC = (2 :: Int)
+
+maybeParen ctxt_prec inner_prec pretty
+ | ctxt_prec < inner_prec = pretty
+ | otherwise = ppParens pretty
+\end{code}
+
@pprGenType@ is the std @Type@ printer; the overloaded @ppr@ function is
defined to use this. @pprParendGenType@ is the same, except it puts
parens around the type, except for the atomic cases. @pprParendGenType@
pprGenType, pprParendGenType :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
=> PprStyle -> GenType tyvar uvar -> Pretty
-pprGenType sty ty = ppr_ty sty (init_ppr_env sty) tOP_PREC ty
-pprParendGenType sty ty = ppr_ty sty (init_ppr_env sty) tYCON_PREC ty
+pprGenType sty ty = ppr_ty (init_ppr_env sty) tOP_PREC ty
+pprParendGenType sty ty = ppr_ty (init_ppr_env sty) tYCON_PREC ty
-pprType sty ty = ppr_ty sty (init_ppr_env sty) tOP_PREC (ty :: Type)
-pprParendType sty ty = ppr_ty sty (init_ppr_env sty) tYCON_PREC (ty :: Type)
+pprType, pprParendType :: PprStyle -> Type -> Pretty
+pprType sty ty = ppr_ty (init_ppr_env_type sty) tOP_PREC ty
+pprParendType sty ty = ppr_ty (init_ppr_env_type sty) tYCON_PREC ty
pprMaybeTy :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
=> PprStyle -> Maybe (GenType tyvar uvar) -> Pretty
\end{code}
\begin{code}
-ppr_ty :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> PprEnv tyvar uvar bndr occ -> Int
+ppr_ty :: PprEnv tyvar uvar bndr occ -> Int
-> GenType tyvar uvar
-> Pretty
-ppr_ty sty env ctxt_prec (TyVarTy tyvar)
- = ppr_tyvar env tyvar
-
-ppr_ty sty env ctxt_prec (TyConTy tycon usage)
- = ppr sty tycon
+ppr_ty env ctxt_prec (TyVarTy tyvar)
+ = pTyVarO env tyvar
-ppr_ty sty env ctxt_prec ty@(ForAllTy _ _)
- | showUserishTypes sty = ppr_ty sty env' ctxt_prec body_ty
+ppr_ty env ctxt_prec (TyConTy tycon usage)
+ = ppr_tycon env tycon
- | otherwise = ppSep [ ppPStr SLIT("_forall_"),
- ppIntersperse pp'SP pp_tyvars,
- ppPStr SLIT("=>"),
- ppr_ty sty env' ctxt_prec body_ty
- ]
+ppr_ty env ctxt_prec ty@(ForAllTy _ _)
+ | show_forall = maybeParen ctxt_prec fUN_PREC $
+ ppSep [ ppPStr SLIT("_forall_"), pp_tyvars,
+ pp_theta, ppPStr SLIT("=>"), pp_body
+ ]
+ | null theta = ppr_ty env ctxt_prec body_ty
+ | otherwise = maybeParen ctxt_prec fUN_PREC $
+ ppSep [pp_theta, ppPStr SLIT("=>"), pp_body]
where
- (tyvars, body_ty) = splitForAllTy ty
- env' = foldl add_tyvar env tyvars
- pp_tyvars = map (ppr_tyvar env') tyvars
-
-ppr_ty sty env ctxt_prec (ForAllUsageTy uv uvs ty)
+ (tyvars, rho_ty) = splitForAllTy ty
+ (theta, body_ty) | show_context = splitRhoTy rho_ty
+ | otherwise = ([], rho_ty)
+
+ pp_tyvars = ppBracket (ppIntersperse ppSP (map (pTyVarB env) tyvars))
+ pp_theta | null theta = ppNil
+ | otherwise = ppCurlies (ppInterleave ppComma (map (ppr_dict env tOP_PREC) theta))
+ pp_body = ppr_ty env tOP_PREC body_ty
+
+ sty = pStyle env
+ show_forall = case sty of
+ PprForUser -> False
+ other -> True
+
+ show_context = case sty of
+ PprInterface -> True
+ PprForUser -> True
+ other -> False
+
+ppr_ty env ctxt_prec (ForAllUsageTy uv uvs ty)
= panic "ppr_ty:ForAllUsageTy"
-ppr_ty sty env ctxt_prec ty@(FunTy (DictTy _ _ _) _ _)
- | showUserishTypes sty
- -- Print a nice looking context (Eq a, Text b) => ...
- = ppSep [ppBeside (ppr_theta theta) (ppPStr SLIT(" =>")),
- ppr_ty sty env ctxt_prec body_ty
- ]
- where
- (theta, body_ty) = splitRhoTy ty
-
- ppr_theta = case sty of { PprInterface -> ppr_theta_2 ; _ -> ppr_theta_1 }
-
- ppr_theta_1 [ct] = ppr_dict sty env tOP_PREC ct
- ppr_theta_1 cts = ppParens (ppInterleave ppComma (map (ppr_dict sty env tOP_PREC) cts))
-
- ppr_theta_2 cts = ppBesides [ppStr "{{", ppInterleave ppComma (map (ppr_dict sty env tOP_PREC) cts), ppStr "}}"]
-
-ppr_ty sty env ctxt_prec (FunTy ty1 ty2 usage)
+ppr_ty env ctxt_prec (FunTy ty1 ty2 usage)
-- We fiddle the precedences passed to left/right branches,
-- so that right associativity comes out nicely...
= maybeParen ctxt_prec fUN_PREC
- (ppCat [ppr_ty sty env fUN_PREC ty1,
- ppPStr SLIT("->"),
- ppr_ty sty env tOP_PREC ty2])
+ (ppCat [ppr_ty env fUN_PREC ty1,
+ ppStr "->",
+ ppr_ty env tOP_PREC ty2])
-ppr_ty sty env ctxt_prec ty@(AppTy _ _)
- = ppr_corner sty env ctxt_prec fun_ty arg_tys
+ppr_ty env ctxt_prec ty@(AppTy _ _)
+ = ppr_corner env ctxt_prec fun_ty arg_tys
where
- (fun_ty, arg_tys) = splitAppTy ty
+ (fun_ty, arg_tys) = splitAppTys ty
-ppr_ty sty env ctxt_prec (SynTy tycon tys expansion)
- | codeStyle sty
+ppr_ty env ctxt_prec (SynTy tycon tys expansion)
+ | codeStyle (pStyle env)
-- always expand types that squeak into C-variable names
- = ppr_ty sty env ctxt_prec expansion
+ = ppr_ty env ctxt_prec expansion
| otherwise
= ppBeside
- (ppr_app sty env ctxt_prec (ppr sty tycon) tys)
- (ifPprShowAll sty (ppCat [ppStr " {- expansion:",
- ppr_ty sty env tOP_PREC expansion,
- ppStr "-}"]))
+ (ppr_app env ctxt_prec (ppr_tycon env tycon) tys)
+ (ifPprShowAll (pStyle env) (ppCat [ppStr " {- expansion:",
+ ppr_ty env tOP_PREC expansion,
+ ppStr "-}"]))
+
+ppr_ty env ctxt_prec (DictTy clas ty usage)
+ = ppCurlies (ppr_dict env tOP_PREC (clas, ty))
+ -- Curlies are temporary
-ppr_ty sty env ctxt_prec (DictTy clas ty usage)
- = ppr_dict sty env ctxt_prec (clas, ty)
-- Some help functions
-ppr_corner sty env ctxt_prec (TyConTy FunTyCon usage) arg_tys
+ppr_corner env ctxt_prec (TyConTy FunTyCon usage) arg_tys
| length arg_tys == 2
- = ppr_ty sty env ctxt_prec (FunTy ty1 ty2 usage)
+ = ppr_ty env ctxt_prec (FunTy ty1 ty2 usage)
where
(ty1:ty2:_) = arg_tys
-ppr_corner sty env ctxt_prec (TyConTy (TupleTyCon _ _ a) usage) arg_tys
- | not (codeStyle sty) -- no magic in that case
+ppr_corner env ctxt_prec (TyConTy (TupleTyCon _ _ a) usage) arg_tys
+ | not (codeStyle (pStyle env)) -- no magic in that case
= --ASSERT(length arg_tys == a)
- (if (length arg_tys /= a) then pprTrace "ppr_corner:" (ppCat [ppInt a, ppInterleave ppComma (map (pprGenType PprDebug) arg_tys)]) else id) $
+ --(if (length arg_tys /= a) then pprTrace "ppr_corner:" (ppCat [ppInt a, ppInterleave ppComma (map (pprGenType PprDebug) arg_tys)]) else id) $
ppBesides [ppLparen, arg_tys_w_commas, ppRparen]
where
- arg_tys_w_commas = ppIntersperse pp'SP (map (ppr_ty sty env tOP_PREC) arg_tys)
+ arg_tys_w_commas = ppIntersperse pp'SP (map (ppr_ty env tOP_PREC) arg_tys)
-ppr_corner sty env ctxt_prec (TyConTy tycon usage) arg_tys
- | not (codeStyle sty) && uniqueOf tycon == listTyConKey
+ppr_corner env ctxt_prec (TyConTy tycon usage) arg_tys
+ | not (codeStyle (pStyle env)) && uniqueOf tycon == listTyConKey
= ASSERT(length arg_tys == 1)
- ppBesides [ppLbrack, ppr_ty sty env tOP_PREC ty1, ppRbrack]
+ ppBesides [ppLbrack, ppr_ty env tOP_PREC ty1, ppRbrack]
where
(ty1:_) = arg_tys
-ppr_corner sty env ctxt_prec (TyConTy tycon usage) arg_tys
- = ppr_app sty env ctxt_prec (ppr sty tycon) arg_tys
+ppr_corner env ctxt_prec (TyConTy tycon usage) arg_tys
+ = ppr_app env ctxt_prec (ppr_tycon env tycon) arg_tys
-ppr_corner sty env ctxt_prec (TyVarTy tyvar) arg_tys
- = ppr_app sty env ctxt_prec (ppr_tyvar env tyvar) arg_tys
+ppr_corner env ctxt_prec (TyVarTy tyvar) arg_tys
+ = ppr_app env ctxt_prec (pTyVarO env tyvar) arg_tys
-ppr_app sty env ctxt_prec pp_fun []
+ppr_app env ctxt_prec pp_fun []
= pp_fun
-ppr_app sty env ctxt_prec pp_fun arg_tys
+ppr_app env ctxt_prec pp_fun arg_tys
= maybeParen ctxt_prec tYCON_PREC (ppCat [pp_fun, arg_tys_w_spaces])
where
- arg_tys_w_spaces = ppIntersperse ppSP (map (ppr_ty sty env tYCON_PREC) arg_tys)
+ arg_tys_w_spaces = ppIntersperse ppSP (map (ppr_ty env tYCON_PREC) arg_tys)
-ppr_dict sty env ctxt_prec (clas, ty)
+ppr_dict env ctxt_prec (clas, ty)
= maybeParen ctxt_prec tYCON_PREC
- (ppCat [ppr sty clas, ppr_ty sty env tYCON_PREC ty])
+ (ppCat [ppr_class env clas, ppr_ty env tYCON_PREC ty])
\end{code}
-This stuff is effectively stubbed out for the time being
-(WDP 960425):
\begin{code}
+ -- This one uses only "ppr"
init_ppr_env sty
- = initPprEnv sty b b b b b b b b b b b
+ = initPprEnv sty b b b b (Just (ppr sty)) (Just (ppr sty)) (Just (ppr sty)) b b b b b
where
b = panic "PprType:init_ppr_env"
-ppr_tyvar env tyvar = ppr (pStyle env) tyvar
-ppr_uvar env uvar = ppr (pStyle env) uvar
-
-add_tyvar env tyvar = env
-add_uvar env uvar = env
-\end{code}
-
-@ppr_ty@ takes an @Int@ that is the precedence of the context.
-The precedence levels are:
-\begin{description}
-\item[0:] What we start with.
-\item[1:] Function application (@FunTys@).
-\item[2:] Type constructors.
-\end{description}
-
-
-\begin{code}
-tOP_PREC = (0 :: Int)
-fUN_PREC = (1 :: Int)
-tYCON_PREC = (2 :: Int)
+ -- This one uses pprTyVarBndr, and thus is specific to GenTyVar's types
+init_ppr_env_type sty
+ = initPprEnv sty b b b b (Just (pprTyVarBndr sty)) (Just (ppr sty)) (Just (ppr sty)) b b b b b
+ where
+ b = panic "PprType:init_ppr_env"
-maybeParen ctxt_prec inner_prec pretty
- | ctxt_prec < inner_prec = pretty
- | otherwise = ppParens pretty
+ppr_tycon env tycon = ppr (pStyle env) tycon
+ppr_class env clas = ppr (pStyle env) clas
\end{code}
%************************************************************************
= case sty of
PprInterface -> pp_u
_ -> ppBesides [pp_name, ppStr "{-", pp_u, ppStr "-}"]
- where
+ where
pp_u = pprUnique uniq
pp_name = case name of
- Just n -> ppPStr (getLocalName n)
+ Just n -> pprOccName sty (getOccName n)
Nothing -> case kind of
TypeKind -> ppChar 'o'
BoxedTypeKind -> ppChar 't'
ArrowKind _ _ -> ppChar 'a'
\end{code}
+We print type-variable binders with their kinds in interface files.
+
+\begin{code}
+pprTyVarBndr sty@PprInterface tyvar@(TyVar uniq kind name usage)
+ | not (isBoxedTypeKind kind)
+ = ppBesides [pprGenTyVar sty tyvar, ppStr " :: ", pprParendKind kind]
+ -- See comments with ppDcolon in PprCore.lhs
+
+pprTyVarBndr sty tyvar = pprGenTyVar sty tyvar
+\end{code}
+
%************************************************************************
%* *
\subsection[TyCon]{@TyCon@}
mangle '>' = ppPStr SLIT("Zg")
pprTyCon :: PprStyle -> TyCon -> Pretty
+pprTyCon sty tycon = ppr sty (getName tycon)
+
+{- This old code looks suspicious to me.
+ Just printing the name should do the job; apart from the extra junk
+ on SynTyCons etc.
+
+ Let's try and live without all this...
+ Delete in due course. SLPJ Nov 96
pprTyCon sty (PrimTyCon _ name _ _) = ppr sty name
n -> maybe_code sty ( "(" ++ nOfThem (n-1) ',' ++ ")" )
pprTyCon sty tycon@(DataTyCon uniq name kind tyvars ctxt cons derivings nd)
- | uniq == listTyConKey
- = maybe_code sty "[]"
- | otherwise
= ppr sty name
pprTyCon sty (SpecTyCon tc ty_maybes)
pprTyCon sty (SynTyCon uniq name kind arity tyvars expansion)
= ppBeside (ppr sty name)
(ifPprShowAll sty
- (ppCat [ ppStr " {-",
+ (ppCat [ ppPStr SLIT(" {-"),
ppInt arity,
interpp'SP sty tyvars,
pprParendGenType sty expansion,
- ppStr "-}"]))
+ ppPStr SLIT("-}")]))
+-}
\end{code}
PprShowAll -> pp_sigd
_ -> pp_user
where
- pp_C = ppPStr op_name
- pp_user = if isLexVarSym op_name && not (isLexSpecialSym op_name)
- then ppParens pp_C
- else pp_C
+ pp_C = ppr sty op_name
+ pp_user = pprNonSymOcc sty op_name
pp_sigd = ppCat [pp_user, ppPStr SLIT("::"), ppr sty ty]
\end{code}
-- Produces things like what we have in mkCompoundName,
-- which can be "dot"ted together...
-getTypeString :: Type -> [Either OrigName FAST_STRING]
+getTypeString :: Type -> FAST_STRING
getTypeString ty
- = case (splitAppTy ty) of { (tc, args) ->
- do_tc tc : map do_arg_ty args }
+ = case (splitAppTys ty) of { (tc, args) ->
+ _CONCAT_ (do_tc tc : map do_arg_ty args) }
where
- do_tc (TyConTy tc _) = Left (origName "do_tc" tc)
+ do_tc (TyConTy tc _) = nameString (getName tc)
do_tc (SynTy _ _ ty) = do_tc ty
do_tc other = --pprTrace "getTypeString:do_tc:" (pprType PprDebug other) $
- Right (_PK_ (ppShow 1000 (pprType PprForC other)))
+ (_PK_ (ppShow 1000 (pprType PprForC other)))
- do_arg_ty (TyConTy tc _) = Left (origName "do_arg_ty" tc)
- do_arg_ty (TyVarTy tv) = Right (_PK_ (ppShow 80 (ppr PprForC tv)))
+ do_arg_ty (TyConTy tc _) = nameString (getName tc)
+ do_arg_ty (TyVarTy tv) = _PK_ (ppShow 80 (ppr PprForC tv))
do_arg_ty (SynTy _ _ ty) = do_arg_ty ty
do_arg_ty other = --pprTrace "getTypeString:do_arg_ty:" (pprType PprDebug other) $
- Right (_PK_ (ppShow 1000 (pprType PprForC other)))
+ _PK_ (ppShow 1000 (pprType PprForC other))
-- PprForC expands type synonyms as it goes;
-- it also forces consistent naming of tycons
-- (e.g., can't have both "(,) a b" and "(a,b)":
-- must be consistent!
- --------------------------------------------------
- -- tidy: very ad-hoc
- tidy [] = [] -- done
-
- tidy (' ' : more)
- = case more of
- ' ' : _ -> tidy more
- '-' : '>' : xs -> '-' : '>' : tidy (no_leading_sps xs)
- other -> ' ' : tidy more
-
- tidy (',' : more) = ',' : tidy (no_leading_sps more)
-
- tidy (x : xs) = x : tidy xs -- catch all
-
- no_leading_sps [] = []
- no_leading_sps (' ':xs) = no_leading_sps xs
- no_leading_sps other = other
-
-typeMaybeString :: Maybe Type -> [Either OrigName FAST_STRING]
-typeMaybeString Nothing = [Right SLIT("!")]
-typeMaybeString (Just t) = getTypeString t
-
specMaybeTysSuffix :: [Maybe Type] -> FAST_STRING
specMaybeTysSuffix ty_maybes
= panic "PprType.specMaybeTysSuffix"
TyVarTy _ -> "*"
AppTy fun _ -> getTyDescription fun
FunTy _ res _ -> '-' : '>' : fun_result res
- TyConTy tycon _ -> _UNPK_ (getLocalName tycon)
- SynTy tycon _ _ -> _UNPK_ (getLocalName tycon)
+ TyConTy tycon _ -> getOccString tycon
+ SynTy tycon _ _ -> getOccString tycon
DictTy _ _ _ -> "dict"
ForAllTy _ ty -> getTyDescription ty
_ -> pprPanic "getTyDescription: other" (pprType PprDebug tau_ty)
= case (lookupUFM_Directly tvenv u) of
Just xx -> (nenv, xx)
Nothing ->
- --pprTrace "nmbrTyVar: lookup failed:" (ppCat (ppr PprDebug u : [ppCat [ppr PprDebug x, ppStr "=>", ppr PprDebug tv] | (x,tv) <- ufmToList tvenv])) $
+ --pprTrace "nmbrTyVar: lookup failed:" (ppCat (ppr PprDebug u : [ppCat [ppr PprDebug x, ppPStr SLIT("=>"), ppr PprDebug tv] | (x,tv) <- ufmToList tvenv])) $
(nenv, tv)
\end{code}
projects / ghc-hetmet.git / blobdiff