%
-% (c) The AQUA Project, Glasgow University, 1996
+% (c) The AQUA Project, Glasgow University, 1996-1998
%
-\section[PprType]{Printing Types, TyVars, Classes, ClassOps, TyCons}
+\section[PprType]{Printing Types, TyVars, Classes, TyCons}
\begin{code}
-#include "HsVersions.h"
-
module PprType(
- GenTyVar, pprGenTyVar,
- TyCon, pprTyCon, showTyCon,
- GenType,
- pprGenType, pprParendGenType,
+ pprKind, pprParendKind,
pprType, pprParendType,
- pprMaybeTy,
- getTypeString,
- typeMaybeString,
- specMaybeTysSuffix,
- GenClass,
- GenClassOp, pprGenClassOp
+ pprConstraint, pprTheta,
+ pprTyVarBndr, pprTyVarBndrs,
+
+ getTyDescription,
+
+ nmbrType, nmbrGlobalType
) where
-import Ubiq
-import IdLoop -- for paranoia checking
-import TyLoop -- for paranoia checking
-import NameLoop -- for paranoia checking
+#include "HsVersions.h"
-- friends:
-- (PprType can see all the representations it's trying to print)
-import Type ( GenType(..), maybeAppTyCon,
- splitForAllTy, splitSigmaTy, splitRhoTy, splitAppTy )
-import TyVar ( GenTyVar(..) )
-import TyCon ( TyCon(..), NewOrData )
-import Class ( Class(..), GenClass(..),
- ClassOp(..), GenClassOp(..) )
-import Kind ( Kind(..) )
+import Type ( GenType(..), TyNote(..), Kind, Type, ThetaType,
+ splitFunTys, splitDictTy_maybe,
+ splitForAllTys, splitSigmaTy, splitRhoTy,
+ boxedTypeKind
+ )
+import Var ( GenTyVar, TyVar, tyVarKind,
+ tyVarName, setTyVarName
+ )
+import VarEnv
+import TyCon ( TyCon, isTupleTyCon, isUnboxedTupleTyCon, tyConArity )
+import Class ( Class )
-- others:
-import CStrings ( identToC )
-import CmdLineOpts ( opt_OmitInterfacePragmas )
import Maybes ( maybeToBool )
-import NameTypes ( ShortName, FullName )
-import Outputable ( ifPprShowAll, isAvarop, interpp'SP )
-import PprStyle ( PprStyle(..), codeStyle, showUserishTypes )
-import Pretty
-import TysWiredIn ( listTyCon )
-import Unique ( pprUnique10, pprUnique )
-import Usage ( UVar(..), pprUVar )
+import Name ( getOccString, setNameVisibility, NamedThing(..) )
+import Outputable
+import PprEnv
+import Unique ( Unique, Uniquable(..),
+ incrUnique, listTyConKey, initTyVarUnique
+ )
import Util
\end{code}
-\begin{code}
-instance (Eq tyvar, Outputable tyvar,
- Eq uvar, Outputable uvar ) => Outputable (GenType tyvar uvar) where
- ppr sty ty = pprGenType sty ty
-
-instance Outputable TyCon where
- ppr sty tycon = pprTyCon sty tycon
-
-instance Outputable (GenClass tyvar uvar) where
- -- we use pprIfaceClass for printing in interfaces
- ppr sty (Class u n _ _ _ _ _ _ _ _) = ppr sty n
-
-instance Outputable ty => Outputable (GenClassOp ty) where
- ppr sty clsop = pprGenClassOp sty clsop
-
-instance Outputable (GenTyVar flexi) where
- ppr sty tv = pprGenTyVar sty tv
-
--- and two SPECIALIZEd ones:
-instance Outputable {-Type, i.e.:-}(GenType TyVar UVar) where
- ppr sty ty = pprGenType sty ty
-
-instance Outputable {-TyVar, i.e.:-}(GenTyVar Usage) where
- ppr sty ty = pprGenTyVar sty ty
-\end{code}
-
%************************************************************************
%* *
-\subsection[Type]{@Type@}
+\subsection{The external interface}
%* *
%************************************************************************
-@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@
+@pprType@ is the standard @Type@ printer; the overloaded @ppr@ function is
+defined to use this. @pprParendType@ is the same, except it puts
+parens around the type, except for the atomic cases. @pprParendType@
works just by setting the initial context precedence very high.
\begin{code}
-pprGenType, pprParendGenType :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> GenType tyvar uvar -> Pretty
-
-pprGenType sty ty = ppr_ty sty (initial_ve sty) tOP_PREC ty
-pprParendGenType sty ty = ppr_ty sty (initial_ve sty) tYCON_PREC ty
-
-pprType sty ty = ppr_ty sty (initial_ve sty) tOP_PREC (ty :: Type)
-pprParendType sty ty = ppr_ty sty (initial_ve sty) tYCON_PREC (ty :: Type)
-
-pprMaybeTy :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> Maybe (GenType tyvar uvar) -> Pretty
-pprMaybeTy sty Nothing = ppChar '*'
-pprMaybeTy sty (Just ty) = pprParendGenType sty ty
-\end{code}
-
-\begin{code}
-ppr_ty :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => PprStyle -> VarEnv tyvar uvar -> 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 sty env ctxt_prec ty@(ForAllTy _ _)
- | showUserishTypes sty = ppr_ty sty env' ctxt_prec body_ty
-
- | otherwise = ppSep [ ppPStr SLIT("_forall_"),
- ppIntersperse pp'SP pp_tyvars,
- ppPStr SLIT("=>"),
- ppr_ty sty env' ctxt_prec body_ty
- ]
- 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)
- = 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 [ppBesides [ppLparen,
- ppIntersperse pp'SP (map (ppr_dict sty env tOP_PREC) theta),
- ppRparen],
- ppPStr SLIT("=>"),
- ppr_ty sty env ctxt_prec body_ty
- ]
- where
- (theta, body_ty) = splitRhoTy ty
-
-ppr_ty sty 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])
+pprType, pprParendType :: GenType flexi -> SDoc
+pprType ty = ppr_ty pprTyEnv tOP_PREC ty
+pprParendType ty = ppr_ty pprTyEnv tYCON_PREC ty
-ppr_ty sty env ctxt_prec ty@(AppTy _ _)
- = ppr_corner sty env ctxt_prec fun_ty arg_tys
- where
- (fun_ty, arg_tys) = splitAppTy ty
+pprKind, pprParendKind :: Kind -> SDoc
+pprKind = pprType
+pprParendKind = pprParendType
-ppr_ty PprInterface env ctxt_prec (SynTy tycon tys expansion)
- -- always expand types in an interface
- = ppr_ty PprInterface env ctxt_prec expansion
+pprConstraint :: Class -> [GenType flexi] -> SDoc
+pprConstraint clas tys = ppr clas <+> hsep (map (pprParendType) tys)
-ppr_ty sty env ctxt_prec (SynTy tycon tys expansion)
- = ppBeside
- (ppr_app sty env ctxt_prec (ppr sty tycon) tys)
- (ifPprShowAll sty (ppCat [ppStr " {- expansion:",
- ppr_ty sty env tOP_PREC expansion,
- ppStr "-}"]))
+pprTheta :: ThetaType -> SDoc
+pprTheta theta = parens (hsep (punctuate comma (map ppr_dict theta)))
+ where
+ ppr_dict (c,tys) = pprConstraint c tys
-ppr_ty sty env ctxt_prec (DictTy clas ty usage)
- = ppr_dict sty env ctxt_prec (clas, ty)
+instance Outputable (GenType flexi) where
+ ppr ty = pprType ty
+\end{code}
--- Some help functions
-ppr_corner sty env ctxt_prec (TyConTy FunTyCon usage) arg_tys
- = ASSERT(length arg_tys == 2)
- ppr_ty sty env ctxt_prec (FunTy ty1 ty2 usage)
- where
- (ty1:ty2:_) = arg_tys
+%************************************************************************
+%* *
+\subsection{Pretty printing}
+%* *
+%************************************************************************
-ppr_corner sty env ctxt_prec (TyConTy (TupleTyCon a) usage) arg_tys
- = ASSERT(length arg_tys == a)
- ppBesides [ppLparen, arg_tys_w_commas, ppRparen]
- where
- arg_tys_w_commas = ppIntersperse pp'SP (map (ppr_ty sty env tOP_PREC) arg_tys)
+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}
-ppr_corner sty env ctxt_prec (TyConTy tycon usage) arg_tys
- | tycon == listTyCon
- = ASSERT(length arg_tys == 1)
- ppBesides [ppLbrack, ppr_ty sty 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 sty env ctxt_prec (TyVarTy tyvar) arg_tys
- = ppr_app sty env ctxt_prec (ppr_tyvar env tyvar) arg_tys
-
-
-ppr_app sty env ctxt_prec pp_fun []
- = pp_fun
-ppr_app sty 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)
+\begin{code}
+tOP_PREC = (0 :: Int)
+fUN_PREC = (1 :: Int)
+tYCON_PREC = (2 :: Int)
-ppr_dict sty env ctxt_prec (clas, ty)
- = maybeParen ctxt_prec tYCON_PREC
- (ppCat [ppr sty clas, ppr_ty sty env tYCON_PREC ty])
+maybeParen ctxt_prec inner_prec pretty
+ | ctxt_prec < inner_prec = pretty
+ | otherwise = parens pretty
\end{code}
-Nota Bene: we must assign print-names to the forall'd type variables
-alphabetically, with the first forall'd variable having the alphabetically
-first name. Reason: so anyone reading the type signature printed without
-explicit forall's will be able to reconstruct them in the right order.
-
\begin{code}
--- Entirely local to this module
-data VarEnv tyvar uvar
- = VE [Pretty] -- Tyvar pretty names
- (tyvar -> Pretty) -- Tyvar lookup function
- [Pretty] -- Uvar pretty names
- (uvar -> Pretty) -- Uvar lookup function
-
-initial_ve PprForC = VE [] (\tv -> ppChar '*')
- [] (\tv -> ppChar '#')
-
-initial_ve sty = VE tv_pretties (ppr sty)
- uv_pretties (ppr sty)
+ppr_ty :: PprEnv (GenTyVar flexi) flexi -> Int
+ -> GenType flexi
+ -> SDoc
+
+ppr_ty env ctxt_prec (TyVarTy tyvar)
+ = pTyVarO env tyvar
+
+ -- TUPLE CASE (boxed and unboxed)
+ppr_ty env ctxt_prec (TyConApp tycon tys)
+ | isTupleTyCon tycon
+ && length tys == tyConArity tycon -- no magic if partially applied
+ = parens tys_w_commas
+
+ | isUnboxedTupleTyCon tycon
+ && length tys == tyConArity tycon -- no magic if partially applied
+ = parens (char '#' <+> tys_w_commas <+> char '#')
+ where
+ tys_w_commas = sep (punctuate comma (map (ppr_ty env tOP_PREC) tys))
+
+ -- LIST CASE
+ppr_ty env ctxt_prec (TyConApp tycon [ty])
+ | getUnique tycon == listTyConKey
+ = brackets (ppr_ty env tOP_PREC ty)
+
+ -- DICTIONARY CASE, prints {C a}
+ -- This means that instance decls come out looking right in interfaces
+ -- and that in turn means they get "gated" correctly when being slurped in
+ppr_ty env ctxt_prec ty@(TyConApp tycon tys)
+ | maybeToBool maybe_dict
+ = braces (ppr_dict env tYCON_PREC ctys)
where
- tv_pretties = map (\ c -> ppChar c ) ['a' .. 'h']
- ++
- map (\ n -> ppBeside (ppChar 'a') (ppInt n))
- ([0 .. ] :: [Int]) -- a0 ... aN
+ Just ctys = maybe_dict
+ maybe_dict = splitDictTy_maybe ty
+
+ -- NO-ARGUMENT CASE (=> no parens)
+ppr_ty env ctxt_prec (TyConApp tycon [])
+ = ppr tycon
+
+ -- GENERAL CASE
+ppr_ty env ctxt_prec (TyConApp tycon tys)
+ = maybeParen ctxt_prec tYCON_PREC (hsep [ppr tycon, tys_w_spaces])
+ where
+ tys_w_spaces = hsep (map (ppr_ty env tYCON_PREC) tys)
+
+
+ppr_ty env ctxt_prec ty@(ForAllTy _ _)
+ = getPprStyle $ \ sty ->
+ maybeParen ctxt_prec fUN_PREC $
+ if userStyle sty then
+ sep [ ptext SLIT("forall"), pp_tyvars, ptext SLIT("."), pp_maybe_ctxt, pp_body ]
+ else
+ sep [ ptext SLIT("__forall"), brackets pp_tyvars, pp_ctxt, pp_body ]
+ where
+ (tyvars, rho_ty) = splitForAllTys ty
+ (theta, body_ty) = splitRhoTy rho_ty
- uv_pretties = map (\ c -> ppChar c ) ['u' .. 'y']
- ++
- map (\ n -> ppBeside (ppChar 'u') (ppInt n))
- ([0 .. ] :: [Int]) -- u0 ... uN
+ pp_tyvars = hsep (map (pBndr env LambdaBind) tyvars)
+ pp_body = ppr_ty env tOP_PREC body_ty
+ pp_maybe_ctxt | null theta = empty
+ | otherwise = pp_ctxt
-ppr_tyvar (VE _ ppr _ _) tyvar = ppr tyvar
-ppr_uvar (VE _ _ _ ppr) uvar = ppr uvar
+ pp_ctxt = ppr_theta env theta <+> ptext SLIT("=>")
-add_tyvar ve@(VE [] _ _ _) tyvar = ve
-add_tyvar (VE (tv_pp:tv_supply') tv_ppr uv_supply uv_ppr) tyvar
- = VE tv_supply' tv_ppr' uv_supply uv_ppr
- where
- tv_ppr' tv | tv==tyvar = tv_pp
- | otherwise = tv_ppr tv
-add_uvar ve@(VE _ _ [] _) uvar = ve
-add_uvar (VE tv_supply tv_ppr (uv_pp:uv_supply') uv_ppr) uvar
- = VE tv_supply tv_ppr uv_supply' uv_ppr'
+ppr_ty env ctxt_prec (FunTy ty1 ty2)
+ -- We fiddle the precedences passed to left/right branches,
+ -- so that right associativity comes out nicely...
+ = maybeParen ctxt_prec fUN_PREC (sep (ppr_ty env fUN_PREC ty1 : pp_rest))
where
- uv_ppr' uv | uv==uvar = uv_pp
- | otherwise = uv_ppr uv
-\end{code}
+ (arg_tys, result_ty) = splitFunTys ty2
+ pp_rest = [ ptext SLIT("-> ") <> ppr_ty env fUN_PREC ty | ty <- arg_tys ++ [result_ty] ]
-@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}
+ppr_ty env ctxt_prec (AppTy ty1 ty2)
+ = maybeParen ctxt_prec tYCON_PREC $
+ ppr_ty env tOP_PREC ty1 <+> ppr_ty env tYCON_PREC ty2
+ppr_ty env ctxt_prec (NoteTy (SynNote ty) expansion)
+ = ppr_ty env ctxt_prec ty
-\begin{code}
-tOP_PREC = (0 :: Int)
-fUN_PREC = (1 :: Int)
-tYCON_PREC = (2 :: Int)
+ppr_ty env ctxt_prec (NoteTy (FTVNote _) ty) = ppr_ty env ctxt_prec ty
-maybeParen ctxt_prec inner_prec pretty
- | ctxt_prec < inner_prec = pretty
- | otherwise = ppParens pretty
-\end{code}
+ppr_theta env [] = empty
+ppr_theta env theta = braces (hsep (punctuate comma (map (ppr_dict env tOP_PREC) theta)))
-%************************************************************************
-%* *
-\subsection[TyVar]{@TyVar@}
-%* *
-%************************************************************************
+ppr_dict env ctxt (clas, tys) = ppr clas <+>
+ hsep (map (ppr_ty env tYCON_PREC) tys)
+\end{code}
\begin{code}
-pprGenTyVar sty (TyVar uniq kind name usage)
- = ppBesides [pp_name, pprUnique10 uniq]
+pprTyEnv = initPprEnv b b (Just ppr) b (Just (\site -> pprTyVarBndr)) b
where
- pp_name = case name of
- Just n -> ppr sty n
- Nothing -> case kind of
- TypeKind -> ppChar 'o'
- BoxedTypeKind -> ppChar 't'
- UnboxedTypeKind -> ppChar 'u'
- ArrowKind _ _ -> ppChar 'a'
+ b = panic "PprType:init_ppr_env"
\end{code}
%************************************************************************
%* *
-\subsection[TyCon]{@TyCon@}
+\subsection[TyVar]{@TyVar@}
%* *
%************************************************************************
-ToDo; all this is suspiciously like getOccurrenceName!
+We print type-variable binders with their kinds in interface files,
+and when in debug mode.
\begin{code}
-showTyCon :: PprStyle -> TyCon -> String
-showTyCon sty tycon = ppShow 80 (pprTyCon sty tycon)
-
-pprTyCon :: PprStyle -> TyCon -> Pretty
-
-pprTyCon sty FunTyCon = ppStr "(->)"
-pprTyCon sty (TupleTyCon arity) = ppBeside (ppPStr SLIT("Tuple")) (ppInt arity)
-pprTyCon sty (PrimTyCon uniq name kind) = ppr sty name
-
-pprTyCon sty tycon@(DataTyCon uniq kind name tyvars ctxt cons derivings nd)
- = case sty of
- PprDebug -> pp_tycon_and_uniq
- PprShowAll -> pp_tycon_and_uniq
- _ -> pp_tycon
+pprTyVarBndr tyvar
+ = getPprStyle $ \ sty ->
+ if (ifaceStyle sty || debugStyle sty) && kind /= boxedTypeKind then
+ hcat [ppr tyvar, text " :: ", pprParendKind kind]
+ -- See comments with ppDcolon in PprCore.lhs
+ else
+ ppr tyvar
where
- pp_tycon_and_uniq = ppBesides [pp_tycon, ppChar '.', pprUnique uniq]
- pp_tycon = ppr sty name
-
-pprTyCon sty (SpecTyCon tc ty_maybes)
- = ppBeside (pprTyCon sty tc)
- (if (codeStyle sty)
- then identToC tys_stuff
- else ppPStr tys_stuff)
- where
- tys_stuff = specMaybeTysSuffix ty_maybes
-
-pprTyCon sty (SynTyCon uniq name kind arity tyvars expansion)
- = ppBeside (ppr sty name)
- (ifPprShowAll sty
- (ppCat [ ppStr " {-",
- ppInt arity,
- interpp'SP sty tyvars,
- pprParendGenType sty expansion,
- ppStr "-}"]))
+ kind = tyVarKind tyvar
+
+pprTyVarBndrs tyvars = hsep (map pprTyVarBndr tyvars)
\end{code}
%************************************************************************
%* *
-\subsection[Class]{@Class@}
+\subsection{Mumbo jumbo}
%* *
%************************************************************************
-\begin{code}
-pprGenClassOp :: Outputable ty => PprStyle -> GenClassOp ty -> Pretty
-
-pprGenClassOp sty op = ppr_class_op sty [] op
+Grab a name for the type. This is used to determine the type
+description for profiling.
-ppr_class_op sty tyvars (ClassOp op_name i ty)
- = case sty of
- PprForC -> pp_C
- PprForAsm _ _ -> pp_C
- PprInterface -> ppCat [pp_user, ppPStr SLIT("::"), ppr sty ty]
- PprShowAll -> ppCat [pp_user, ppPStr SLIT("::"), ppr sty ty]
- _ -> pp_user
+\begin{code}
+getTyDescription :: Type -> String
+
+getTyDescription ty
+ = case (splitSigmaTy ty) of { (_, _, tau_ty) ->
+ case tau_ty of
+ TyVarTy _ -> "*"
+ AppTy fun _ -> getTyDescription fun
+ FunTy _ res -> '-' : '>' : fun_result res
+ TyConApp tycon _ -> getOccString tycon
+ NoteTy (FTVNote _) ty -> getTyDescription ty
+ NoteTy (SynNote ty1) _ -> getTyDescription ty1
+ ForAllTy _ ty -> getTyDescription ty
+ }
where
- pp_C = ppPStr op_name
- pp_user = if isAvarop op_name
- then ppBesides [ppLparen, pp_C, ppRparen]
- else pp_C
+ fun_result (FunTy _ res) = '>' : fun_result res
+ fun_result other = getTyDescription other
\end{code}
%************************************************************************
%* *
-\subsection[]{Mumbo jumbo}
+\subsection{Renumbering types}
%* *
%************************************************************************
-\begin{code}
- -- Shallowly magical; converts a type into something
- -- vaguely close to what can be used in C identifier.
- -- Don't forget to include the module name!!!
-getTypeString :: Type -> [FAST_STRING]
-getTypeString ty
- | is_prelude_ty = [string]
- | otherwise = [mod, string]
- where
- string = _PK_ (tidy (ppShow 1000 ppr_t))
- ppr_t = pprGenType PprForC ty
- -- PprForC expands type synonyms as it goes
-
- (is_prelude_ty, mod)
- = case (maybeAppTyCon ty) of
- Nothing -> true_bottom
- Just (tycon,_) ->
- if fromPreludeCore tycon
- then true_bottom
- else (False, fst (getOrigName tycon))
-
- true_bottom = (True, panic "getTypeString")
-
- --------------------------------------------------
- -- 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 -> [FAST_STRING]
-typeMaybeString Nothing = [SLIT("!")]
-typeMaybeString (Just t) = getTypeString t
-
-specMaybeTysSuffix :: [Maybe Type] -> FAST_STRING
-specMaybeTysSuffix ty_maybes
- = let
- ty_strs = concat (map typeMaybeString ty_maybes)
- dotted_tys = [ _CONS_ '.' str | str <- ty_strs ]
- in
- _CONCAT_ dotted_tys
-\end{code}
-
-========================================================
- INTERFACE STUFF; move it out
-
+We tend to {\em renumber} everything before printing, so that we get
+consistent Uniques on everything from run to run.
-\begin{pseudocode}
-pprTyCon sty@PprInterface (SynonymTyCon k n a vs exp unabstract) specs
- = ASSERT (null specs)
- let
- lookup_fn = mk_lookup_tyvar_fn sty vs
- pp_tyvars = map lookup_fn vs
- in
- ppCat [ppPStr SLIT("type"), ppr sty n, ppIntersperse ppSP pp_tyvars,
- ppEquals, ppr_ty sty lookup_fn tOP_PREC exp]
-
-pprTyCon sty@PprInterface this_tycon@(DataTyCon k n a vs ctxt cons derivings data_or_new) specs
- = ppHang (ppCat [pp_data_or_new,
- pprContext sty ctxt,
- ppr sty n,
- ppIntersperse ppSP (map lookup_fn vs)])
- 4
- (ppCat [pp_unabstract_condecls,
- pp_pragma])
- -- NB: we do not print deriving info in interfaces
- where
- lookup_fn = mk_lookup_tyvar_fn sty vs
-
- pp_data_or_new = case data_or_new of
- DataType -> ppPStr SLIT("data")
- NewType -> ppPStr SLIT("newtype")
-
- yes_we_print_condecls
- = unabstract
- && not (null cons) -- we know what they are
- && (case (getExportFlag n) of
- ExportAbs -> False
- other -> True)
- yes_we_print_pragma_condecls
- = not yes_we_print_condecls
- && not opt_OmitInterfacePragmas
- && not (null cons)
- && not (maybeToBool (maybePurelyLocalTyCon this_tycon))
- {- && not (any (dataConMentionsNonPreludeTyCon this_tycon) cons) -}
-
- yes_we_print_pragma_specs
- = not (null specs)
+\begin{code}
+nmbrGlobalType :: Type -> Type -- Renumber a top-level type
+nmbrGlobalType ty = nmbrType emptyVarEnv initTyVarUnique ty
- pp_unabstract_condecls
- = if yes_we_print_condecls
- then ppCat [ppSP, ppEquals, pp_condecls]
- else ppNil
+nmbrType :: TyVarEnv Type -- Substitution
+ -> Unique -- This unique and its successors are not
+ -- free in the range of the substitution
+ -> Type
+ -> Type
- pp_pragma_condecls
- = if yes_we_print_pragma_condecls
- then pp_condecls
- else ppNil
+nmbrType tyvar_env uniq ty
+ = initNmbr tyvar_env uniq (nmbrTy ty)
- pp_pragma_specs
- = if yes_we_print_pragma_specs
- then pp_specs
- else ppNil
+nmbrTy :: Type -> NmbrM Type
- pp_pragma
- = if (yes_we_print_pragma_condecls || yes_we_print_pragma_specs)
- then ppCat [ppStr "\t{-# GHC_PRAGMA", pp_pragma_condecls, pp_pragma_specs, ppStr "#-}"]
- else ppNil
+nmbrTy (TyVarTy tv)
+ = lookupTyVar tv
- pp_condecls
- = let
- (c:cs) = cons
- in
- ppCat ((ppr_con c) : (map ppr_next_con cs))
- where
- ppr_con con
- = let
- (_, _, con_arg_tys, _) = dataConSig con
- in
- ppCat [pprNonOp PprForUser con, -- the data con's name...
- ppIntersperse ppSP (map (ppr_ty sty lookup_fn tYCON_PREC) con_arg_tys)]
+nmbrTy (AppTy t1 t2)
+ = nmbrTy t1 `thenNmbr` \ new_t1 ->
+ nmbrTy t2 `thenNmbr` \ new_t2 ->
+ returnNmbr (AppTy new_t1 new_t2)
- ppr_next_con con = ppCat [ppChar '|', ppr_con con]
+nmbrTy (TyConApp tc tys)
+ = mapNmbr nmbrTy tys `thenNmbr` \ new_tys ->
+ returnNmbr (TyConApp tc new_tys)
- pp_specs
- = ppBesides [ppPStr SLIT("_SPECIALIZE_ "), pp_the_list [
- ppCat [ppLbrack, ppInterleave ppComma (map pp_maybe ty_maybes), ppRbrack]
- | ty_maybes <- specs ]]
+nmbrTy (NoteTy (SynNote ty1) ty2)
+ = nmbrTy ty1 `thenNmbr` \ new_ty1 ->
+ nmbrTy ty2 `thenNmbr` \ new_ty2 ->
+ returnNmbr (NoteTy (SynNote new_ty1) new_ty2)
- pp_the_list [p] = p
- pp_the_list (p:ps) = ppAbove (ppBeside p ppComma) (pp_the_list ps)
+nmbrTy (NoteTy (FTVNote _) ty2) = nmbrTy ty2
- pp_maybe Nothing = pp_NONE
- pp_maybe (Just ty) = pprParendGenType sty ty
+nmbrTy (ForAllTy tv ty)
+ = addTyVar tv $ \ new_tv ->
+ nmbrTy ty `thenNmbr` \ new_ty ->
+ returnNmbr (ForAllTy new_tv new_ty)
- pp_NONE = ppPStr SLIT("_N_")
+nmbrTy (FunTy t1 t2)
+ = nmbrTy t1 `thenNmbr` \ new_t1 ->
+ nmbrTy t2 `thenNmbr` \ new_t2 ->
+ returnNmbr (FunTy new_t1 new_t2)
-pprTyCon PprInterface (TupleTyCon a) specs
- = ASSERT (null specs)
- ppCat [ ppStr "{- Tuple", ppInt a, ppStr "-}" ]
-pprTyCon PprInterface (PrimTyCon k n a kind_fn) specs
- = ASSERT (null specs)
- ppCat [ ppStr "{- data", ppr PprForUser n, ppStr " *built-in* -}" ]
+lookupTyVar tyvar env uniq
+ = (uniq, ty)
+ where
+ ty = case lookupVarEnv env tyvar of
+ Just ty -> ty
+ Nothing -> TyVarTy tyvar
+addTyVar tv m env u
+ = m tv' env' u'
+ where
+ env' = extendVarEnv env tv (TyVarTy tv')
+ tv' = setTyVarName tv (setNameVisibility Nothing u (tyVarName tv))
+ u' = incrUnique u
+\end{code}
+Monad stuff
+\begin{code}
+type NmbrM a = TyVarEnv Type -> Unique -> (Unique, a) -- Unique is name supply
+initNmbr :: TyVarEnv Type -> Unique -> NmbrM a -> a
+initNmbr env uniq m
+ = snd (m env uniq)
-pprIfaceClass :: (Id -> Id) -> IdEnv UnfoldingDetails -> Class -> Pretty
+returnNmbr x nenv u = (u, x)
-pprIfaceClass better_id_fn inline_env
- (Class k n tyvar super_classes sdsels ops sels defms insts links)
+thenNmbr m k nenv u
= let
- sdsel_infos = map (getIdInfo . better_id_fn) sdsels
+ (u', res) = m nenv u
in
- ppAboves [ ppCat [ppPStr SLIT("class"), ppr_theta tyvar super_classes,
- ppr sty n, lookup_fn tyvar,
- if null sdsel_infos
- || opt_OmitInterfacePragmas
- || (any boringIdInfo sdsel_infos)
- -- ToDo: really should be "all bor..."
- -- but then parsing is more tedious,
- -- and this is really as good in practice.
- then ppNil
- else pp_sdsel_pragmas (sdsels `zip` sdsel_infos),
- if (null ops)
- then ppNil
- else ppPStr SLIT("where")],
- ppNest 8 (ppAboves
- [ ppr_op op (better_id_fn sel) (better_id_fn defm)
- | (op,sel,defm) <- zip3 ops sels defms]) ]
- where
- lookup_fn = mk_lookup_tyvar_fn sty [tyvar]
-
- ppr_theta :: TyVar -> [Class] -> Pretty
- ppr_theta tv [] = ppNil
- ppr_theta tv super_classes
- = ppBesides [ppLparen,
- ppIntersperse pp'SP{-'-} (map ppr_assert super_classes),
- ppStr ") =>"]
- where
- ppr_assert (Class _ n _ _ _ _ _ _ _ _) = ppCat [ppr sty n, lookup_fn tv]
-
- pp_sdsel_pragmas sdsels_and_infos
- = ppCat [ppStr "{-# GHC_PRAGMA {-superdicts-}",
- ppIntersperse pp'SP{-'-}
- [ppIdInfo sty sdsel False{-NO specs-} better_id_fn inline_env info
- | (sdsel, info) <- sdsels_and_infos ],
- ppStr "#-}"]
-
- ppr_op op opsel_id defm_id
- = let
- stuff = ppBeside (ppChar '\t') (ppr_class_op sty [tyvar] op)
- in
- if opt_OmitInterfacePragmas
- then stuff
- else ppAbove stuff
- (ppCat [ppStr "\t {-# GHC_PRAGMA", ppAbove pp_opsel pp_defm, ppStr "#-}"])
- where
- pp_opsel = ppCat [ppPStr SLIT("{-meth-}"), ppIdInfo sty opsel_id False{-no specs-} better_id_fn inline_env (getIdInfo opsel_id)]
- pp_defm = ppCat [ppPStr SLIT("\t\t{-defm-}"), ppIdInfo sty defm_id False{-no specs-} better_id_fn inline_env (getIdInfo defm_id)]
-\end{pseudocode}
+ k res nenv u'
+
+
+mapNmbr f [] = returnNmbr []
+mapNmbr f (x:xs)
+ = f x `thenNmbr` \ r ->
+ mapNmbr f xs `thenNmbr` \ rs ->
+ returnNmbr (r:rs)
+\end{code}
projects / ghc-hetmet.git / blobdiff