#include "HsVersions.h"
module PprCore (
- pprCoreExpr,
- pprCoreBinding,
+ pprCoreExpr, pprIfaceUnfolding,
+ pprCoreBinding, pprCoreBindings,
pprBigCoreBinder,
pprTypedCoreBinder
import CoreSyn
import CostCentre ( showCostCentre )
import Id ( idType, getIdInfo, getIdStrictness, isTupleCon,
- nullIdEnv, SYN_IE(DataCon), GenId{-instances-}
- )
-import IdInfo ( ppIdInfo, StrictnessInfo(..) )
-import IdLoop ( Unfolding ) -- Needed by IdInfo.hi?
+ nullIdEnv, SYN_IE(DataCon), GenId{-instances-},
+ SYN_IE(Id)
+ )
+import IdInfo ( ppIdInfo, ppStrictnessInfo )
import Literal ( Literal{-instances-} )
-import Name ( isSymLexeme )
+import Name ( OccName )
import Outputable -- quite a few things
import PprEnv
-import PprType ( pprParendGenType, GenType{-instances-}, GenTyVar{-instance-} )
-import PprStyle ( PprStyle(..) )
+import PprType ( pprParendGenType, pprTyVarBndr, GenType{-instances-}, GenTyVar{-instance-} )
import Pretty
import PrimOp ( PrimOp{-instances-} )
import TyVar ( GenTyVar{-instances-} )
usually be called through some intermediary.
The binder/occ printers take the default ``homogenized'' (see
-@PprEnv@...) @Pretty@ and the binder/occ. They can either use the
+@PprEnv@...) @Doc@ and the binder/occ. They can either use the
homogenized one, or they can ignore it completely. In other words,
the things passed in act as ``hooks'', getting the last word on how to
print something.
@pprParendCoreExpr@ puts parens around non-atomic Core expressions.
\begin{code}
-pprCoreBinding :: PprStyle -> CoreBinding -> Pretty
+pprCoreBinding :: PprStyle -> CoreBinding -> Doc
+pprCoreBindings :: PprStyle -> [CoreBinding] -> Doc
pprGenCoreBinding
- :: (Eq tyvar, Outputable tyvar,
+ :: (Eq tyvar, Outputable tyvar,
Eq uvar, Outputable uvar,
Outputable bndr,
Outputable occ)
=> PprStyle
- -> (bndr -> Pretty) -- to print "major" val_bdrs
- -> (bndr -> Pretty) -- to print "minor" val_bdrs
- -> (occ -> Pretty) -- to print bindees
+ -> (bndr -> Doc) -- to print "major" val_bdrs
+ -> (bndr -> Doc) -- to print "minor" val_bdrs
+ -> (occ -> Doc) -- to print bindees
-> GenCoreBinding bndr occ tyvar uvar
- -> Pretty
+ -> Doc
pprGenCoreBinding sty pbdr1 pbdr2 pocc bind
- = ppr_bind (init_ppr_env sty pbdr1 pbdr2 pocc) bind
+ = ppr_bind (init_ppr_env sty (ppr sty) pbdr1 pbdr2 pocc) bind
-init_ppr_env sty pbdr1 pbdr2 pocc
+init_ppr_env sty tvbndr pbdr1 pbdr2 pocc
= initPprEnv sty
(Just (ppr sty)) -- literals
- (Just (ppr sty)) -- data cons
- (Just (ppr sty)) -- primops
- (Just (\ cc -> ppStr (showCostCentre sty True cc)))
- (Just (ppr sty)) -- tyvars
- (Just (ppr sty)) -- usage vars
+ (Just ppr_con) -- data cons
+ (Just ppr_prim) -- primops
+ (Just (\ cc -> text (showCostCentre sty True cc)))
+ (Just tvbndr) -- tyvar binders
+ (Just (ppr sty)) -- tyvar occs
+ (Just (ppr sty)) -- usage vars
(Just pbdr1) (Just pbdr2) (Just pocc) -- value vars
(Just (pprParendGenType sty)) -- types
- (Just (ppr sty)) -- usages
+ (Just (ppr sty)) -- usages
+ where
+
+ ppr_con con = ppr sty con
+
+{- [We now use Con {a,b,c} for Con expressions. SLPJ March 97.]
+ [We can't treat them as ordinary applications because the Con doesn't have
+ dictionaries in it, whereas the constructor Id does.]
+
+ OLD VERSION:
+ -- ppr_con is used when printing Con expressions; we add a "!"
+ -- to distinguish them from ordinary applications. But not when
+ -- printing for interfaces, where they are treated as ordinary applications
+ ppr_con con | ifaceStyle sty = ppr sty con
+ | otherwise = ppr sty con <> char '!'
+-}
+
+ -- We add a "!" to distinguish Primitive applications from ordinary applications.
+ -- But not when printing for interfaces, where they are treated
+ -- as ordinary applications
+ ppr_prim prim | ifaceStyle sty = ppr sty prim
+ | otherwise = ppr sty prim <> char '!'
--------------
+pprCoreBindings sty binds = vcat (map (pprCoreBinding sty) binds)
+
pprCoreBinding sty (NonRec binder expr)
- = ppHang (ppCat [pprBigCoreBinder sty binder, ppEquals])
+ = hang (hsep [pprBigCoreBinder sty binder, equals])
4 (pprCoreExpr sty (pprBigCoreBinder sty) (pprBabyCoreBinder sty) (ppr sty) expr)
pprCoreBinding sty (Rec binds)
- = ppAboves [ifPprDebug sty (ppStr "{- plain Rec -}"),
- ppAboves (map ppr_bind binds),
- ifPprDebug sty (ppStr "{- end plain Rec -}")]
+ = vcat [ptext SLIT("Rec {"),
+ vcat (map ppr_bind binds),
+ ptext SLIT("end Rec }")]
where
ppr_bind (binder, expr)
- = ppHang (ppCat [pprBigCoreBinder sty binder, ppEquals])
+ = hang (hsep [pprBigCoreBinder sty binder, equals])
4 (pprCoreExpr sty (pprBigCoreBinder sty) (pprBabyCoreBinder sty) (ppr sty) expr)
\end{code}
\begin{code}
pprCoreExpr
:: PprStyle
- -> (Id -> Pretty) -- to print "major" val_bdrs
- -> (Id -> Pretty) -- to print "minor" val_bdrs
- -> (Id -> Pretty) -- to print bindees
+ -> (Id -> Doc) -- to print "major" val_bdrs
+ -> (Id -> Doc) -- to print "minor" val_bdrs
+ -> (Id -> Doc) -- to print bindees
-> CoreExpr
- -> Pretty
+ -> Doc
pprCoreExpr = pprGenCoreExpr
pprGenCoreExpr, pprParendCoreExpr
- :: (Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar,
+ :: (Eq tyvar, Outputable tyvar,
+ Eq uvar, Outputable uvar,
Outputable bndr,
Outputable occ)
=> PprStyle
- -> (bndr -> Pretty) -- to print "major" val_bdrs
- -> (bndr -> Pretty) -- to print "minor" val_bdrs
- -> (occ -> Pretty) -- to print bindees
+ -> (bndr -> Doc) -- to print "major" val_bdrs
+ -> (bndr -> Doc) -- to print "minor" val_bdrs
+ -> (occ -> Doc) -- to print bindees
-> GenCoreExpr bndr occ tyvar uvar
- -> Pretty
+ -> Doc
pprGenCoreExpr sty pbdr1 pbdr2 pocc expr
- = ppr_expr (init_ppr_env sty pbdr1 pbdr2 pocc) expr
+ = ppr_expr (init_ppr_env sty (ppr sty) pbdr1 pbdr2 pocc) expr
pprParendCoreExpr sty pbdr1 pbdr2 pocc expr
= let
= case expr of
Var _ -> id -- leave unchanged
Lit _ -> id
- _ -> ppParens -- wraps in parens
+ _ -> parens -- wraps in parens
in
parenify (pprGenCoreExpr sty pbdr1 pbdr2 pocc expr)
+-- Printer for unfoldings in interfaces
+pprIfaceUnfolding :: CoreExpr -> Doc
+pprIfaceUnfolding = ppr_expr env
+ where
+ env = init_ppr_env PprInterface (pprTyVarBndr PprInterface)
+ (pprTypedCoreBinder PprInterface)
+ (ppr PprInterface)
+ (ppr PprInterface)
+
ppr_core_arg sty pocc arg
- = ppr_arg (init_ppr_env sty pocc pocc pocc) arg
+ = ppr_arg (init_ppr_env sty (ppr sty) pocc pocc pocc) arg
ppr_core_alts sty pbdr1 pbdr2 pocc alts
- = ppr_alts (init_ppr_env sty pbdr1 pbdr2 pocc) alts
+ = ppr_alts (init_ppr_env sty (ppr sty) pbdr1 pbdr2 pocc) alts
ppr_core_default sty pbdr1 pbdr2 pocc deflt
- = ppr_default (init_ppr_env sty pbdr1 pbdr2 pocc) deflt
+ = ppr_default (init_ppr_env sty (ppr sty) pbdr1 pbdr2 pocc) deflt
\end{code}
%************************************************************************
Eq uvar, Outputable uvar)
=>
Outputable (GenCoreBinding bndr occ tyvar uvar) where
- ppr sty bind = pprGenCoreBinding sty (ppr sty) (ppr sty) (ppr sty) bind
+ ppr sty bind = pprQuote sty $ \sty ->
+ pprGenCoreBinding sty (ppr sty) (ppr sty) (ppr sty) bind
instance
(Outputable bndr, Outputable occ, Eq tyvar, Outputable tyvar,
Eq uvar, Outputable uvar)
=>
Outputable (GenCoreExpr bndr occ tyvar uvar) where
- ppr sty expr = pprGenCoreExpr sty (ppr sty) (ppr sty) (ppr sty) expr
+ ppr sty expr = pprQuote sty $ \sty ->
+ pprGenCoreExpr sty (ppr sty) (ppr sty) (ppr sty) expr
instance
(Outputable occ, Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
=>
Outputable (GenCoreArg occ tyvar uvar) where
- ppr sty arg = ppr_core_arg sty (ppr sty) arg
+ ppr sty arg = pprQuote sty $ \sty ->
+ ppr_core_arg sty (ppr sty) arg
instance
(Outputable bndr, Outputable occ, Eq tyvar, Outputable tyvar,
Eq uvar, Outputable uvar)
=>
Outputable (GenCoreCaseAlts bndr occ tyvar uvar) where
- ppr sty alts = ppr_core_alts sty (ppr sty) (ppr sty) (ppr sty) alts
+ ppr sty alts = pprQuote sty $ \sty ->
+ ppr_core_alts sty (ppr sty) (ppr sty) (ppr sty) alts
instance
(Outputable bndr, Outputable occ, Eq tyvar, Outputable tyvar,
Eq uvar, Outputable uvar)
=>
Outputable (GenCoreCaseDefault bndr occ tyvar uvar) where
- ppr sty deflt = ppr_core_default sty (ppr sty) (ppr sty) (ppr sty) deflt
+ ppr sty deflt = pprQuote sty $ \sty ->
+ ppr_core_default sty (ppr sty) (ppr sty) (ppr sty) deflt
\end{code}
%************************************************************************
\begin{code}
ppr_bind pe (NonRec val_bdr expr)
- = ppHang (ppCat [pMajBndr pe val_bdr, ppEquals])
+ = hang (hsep [pMajBndr pe val_bdr, equals])
4 (ppr_expr pe expr)
ppr_bind pe (Rec binds)
- = ppAboves [ ppStr "{- Rec -}",
- ppAboves (map ppr_pair binds),
- ppStr "{- end Rec -}" ]
+ = vcat (map ppr_pair binds)
where
ppr_pair (val_bdr, expr)
- = ppHang (ppCat [pMajBndr pe val_bdr, ppEquals])
- 4 (ppr_expr pe expr)
+ = hang (hsep [pMajBndr pe val_bdr, equals])
+ 4 (ppr_expr pe expr <> semi)
\end{code}
\begin{code}
= case expr of
Var _ -> id -- leave unchanged
Lit _ -> id
- _ -> ppParens -- wraps in parens
+ _ -> parens -- wraps in parens
in
parenify (ppr_expr pe expr)
\end{code}
\begin{code}
ppr_expr pe (Var name) = pOcc pe name
ppr_expr pe (Lit lit) = pLit pe lit
-ppr_expr pe (Con con []) = pCon pe con
ppr_expr pe (Con con args)
- = ppHang (ppBesides [pCon pe con, ppChar '!'])
- 4 (ppSep (map (ppr_arg pe) args))
+ = hang (pCon pe con)
+ 4 (braces $ sep (map (ppr_arg pe) args))
ppr_expr pe (Prim prim args)
- = ppHang (ppBesides [pPrim pe prim, ppChar '!'])
- 4 (ppSep (map (ppr_arg pe) args))
+ = hang (pPrim pe prim)
+ 4 (sep (map (ppr_arg pe) args))
ppr_expr pe expr@(Lam _ _)
= let
(uvars, tyvars, vars, body) = collectBinders expr
in
- ppHang (ppCat [pp_vars SLIT("_/u\\_") (pUVar pe) uvars,
- pp_vars SLIT("_/\\_") (pTyVar pe) tyvars,
- pp_vars SLIT("\\") (pMinBndr pe) vars])
+ hang (hsep [pp_vars SLIT("/u\\") (pUVar pe) uvars,
+ pp_vars SLIT("_/\\_") (pTyVarB pe) tyvars,
+ pp_vars SLIT("\\") (pMajndr pe) vars])
4 (ppr_expr pe body)
where
- pp_vars lam pp [] = ppNil
+ pp_vars lam pp [] = empty
pp_vars lam pp vs
- = ppCat [ppPStr lam, ppInterleave ppSP (map pp vs), ppStr "->"]
+ = hsep [ptext lam, hsep (map pp vs), ptext SLIT("->")]
-ppr_expr pe expr@(App _ _)
+ppr_expr pe expr@(App fun arg)
= let
- (fun, uargs, targs, vargs) = collectArgs expr
+ (final_fun, final_args) = go fun [arg]
+ go (App fun arg) args_so_far = go fun (arg:args_so_far)
+ go fun args_so_far = (fun, args_so_far)
in
- ppHang (ppr_parend_expr pe fun)
- 4 (ppSep [ ppInterleave ppNil (map (pUse pe) uargs)
- , ppInterleave ppNil (map (pTy pe) targs)
- , ppInterleave ppNil (map (ppr_arg pe) vargs)
- ])
+ hang (ppr_parend_expr pe final_fun) 4 (sep (map (ppr_arg pe) final_args))
ppr_expr pe (Case expr alts)
| only_one_alt alts
-- johan thinks that single case patterns should be on same line as case,
-- and no indent; all sane persons agree with him.
= let
- ppr_alt (AlgAlts [] (BindDefault n _)) = ppBeside (pMinBndr pe n) (ppStr " ->")
- ppr_alt (PrimAlts [] (BindDefault n _)) = ppBeside (pMinBndr pe n) (ppStr " ->")
- ppr_alt (PrimAlts ((l, _):[]) NoDefault)= ppBeside (pLit pe l) (ppStr " ->")
+
+ ppr_alt (AlgAlts [] (BindDefault n _)) = (<>) (pMinBndr pe n) ppr_arrow
+ ppr_alt (PrimAlts [] (BindDefault n _)) = (<>) (pMinBndr pe n) ppr_arrow
+ ppr_alt (PrimAlts ((l, _):[]) NoDefault)= (<>) (pLit pe l) ppr_arrow
ppr_alt (AlgAlts ((con, params, _):[]) NoDefault)
- = ppCat [ppr_alt_con con (pCon pe con),
- ppInterleave ppSP (map (pMinBndr pe) params),
- ppStr "->"]
+ = hsep [pCon pe con,
+ hsep (map (pMinBndr pe) params),
+ ppr_arrow]
ppr_rhs (AlgAlts [] (BindDefault _ expr)) = ppr_expr pe expr
ppr_rhs (AlgAlts ((_,_,expr):[]) NoDefault) = ppr_expr pe expr
ppr_rhs (PrimAlts [] (BindDefault _ expr)) = ppr_expr pe expr
ppr_rhs (PrimAlts ((_,expr):[]) NoDefault) = ppr_expr pe expr
+
+
+ ppr_arrow = ptext SLIT(" ->")
in
- ppSep
- [ppSep [ppPStr SLIT("case"), ppNest 4 (ppr_parend_expr pe expr), ppStr "of {", ppr_alt alts],
- ppBeside (ppr_rhs alts) (ppStr "}")]
+ sep
+ [sep [pp_keyword, nest 4 (ppr_expr pe expr), text "of {", ppr_alt alts],
+ (<>) (ppr_rhs alts) (text ";}")]
| otherwise -- default "case" printing
- = ppSep
- [ppSep [ppPStr SLIT("case"), ppNest 4 (ppr_parend_expr pe expr), ppStr "of {"],
- ppNest 2 (ppr_alts pe alts),
- ppStr "}"]
+ = sep
+ [sep [pp_keyword, nest 4 (ppr_expr pe expr), ptext SLIT("of {")],
+ nest 2 (ppr_alts pe alts),
+ text "}"]
+ where
+ pp_keyword = case alts of
+ AlgAlts _ _ -> ptext SLIT("case")
+ PrimAlts _ _ -> ptext SLIT("case#")
-- special cases: let ... in let ...
-- ("disgusting" SLPJ)
ppr_expr pe (Let bind@(NonRec val_bdr rhs@(Let _ _)) body)
- = ppAboves [
- ppCat [ppStr "let {", pMajBndr pe val_bdr, ppEquals],
- ppNest 2 (ppr_expr pe rhs),
- ppStr "} in",
+ = vcat [
+ hsep [ptext SLIT("let {"), pMajBndr pe val_bdr, equals],
+ nest 2 (ppr_expr pe rhs),
+ ptext SLIT("} in"),
ppr_expr pe body ]
ppr_expr pe (Let bind@(NonRec val_bdr rhs) expr@(Let _ _))
- = ppAbove
- (ppHang (ppStr "let {")
- 2 (ppCat [ppHang (ppCat [pMajBndr pe val_bdr, ppEquals])
+ = ($$)
+ (hang (ptext SLIT("let {"))
+ 2 (hsep [hang (hsep [pMajBndr pe val_bdr, equals])
4 (ppr_expr pe rhs),
- ppStr "} in"]))
+ ptext SLIT("} in")]))
(ppr_expr pe expr)
-- general case (recursive case, too)
ppr_expr pe (Let bind expr)
- = ppSep [ppHang (ppStr "let {") 2 (ppr_bind pe bind),
- ppHang (ppStr "} in ") 2 (ppr_expr pe expr)]
+ = sep [hang (ptext keyword) 2 (ppr_bind pe bind),
+ hang (ptext SLIT("} in ")) 2 (ppr_expr pe expr)]
+ where
+ keyword = case bind of
+ Rec _ -> SLIT("_letrec_ {")
+ NonRec _ _ -> SLIT("let {")
ppr_expr pe (SCC cc expr)
- = ppSep [ppCat [ppPStr SLIT("_scc_"), pSCC pe cc],
+ = sep [hsep [ptext SLIT("_scc_"), pSCC pe cc],
ppr_parend_expr pe expr ]
ppr_expr pe (Coerce c ty expr)
- = ppSep [ppCat [ppPStr SLIT("_coerce_"), pp_coerce c],
- pTy pe ty, ppr_parend_expr pe expr ]
+ = sep [pp_coerce c, pTy pe ty, ppr_expr pe expr]
where
- pp_coerce (CoerceIn v) = ppBeside (ppStr "{-in-}") (ppr (pStyle pe) v)
- pp_coerce (CoerceOut v) = ppBeside (ppStr "{-out-}") (ppr (pStyle pe) v)
+ pp_coerce (CoerceIn v) = (<>) (ptext SLIT("_coerce_in_ ")) (ppr (pStyle pe) v)
+ pp_coerce (CoerceOut v) = (<>) (ptext SLIT("_coerce_out_ ")) (ppr (pStyle pe) v)
only_one_alt (AlgAlts [] (BindDefault _ _)) = True
only_one_alt (AlgAlts (_:[]) NoDefault) = True
only_one_alt (PrimAlts [] (BindDefault _ _)) = True
only_one_alt (PrimAlts (_:[]) NoDefault) = True
only_one_alt _ = False
-
-ppr_alt_con con pp_con
- = if isSymLexeme con then ppParens pp_con else pp_con
\end{code}
\begin{code}
ppr_alts pe (AlgAlts alts deflt)
- = ppAboves [ ppAboves (map ppr_alt alts), ppr_default pe deflt ]
+ = vcat [ vcat (map ppr_alt alts), ppr_default pe deflt ]
where
+ ppr_arrow = ptext SLIT("->")
+
ppr_alt (con, params, expr)
- = ppHang (if isTupleCon con then
- ppCat [ppParens (ppInterleave ppComma (map (pMinBndr pe) params)),
- ppStr "->"]
+ = hang (if isTupleCon con then
+ hsep [parens (hsep (punctuate comma (map (pMinBndr pe) params))),
+ ppr_arrow]
else
- ppCat [ppr_alt_con con (pCon pe con),
- ppInterleave ppSP (map (pMinBndr pe) params),
- ppStr "->"]
+ hsep [pCon pe con,
+ hsep (map (pMinBndr pe) params),
+ ppr_arrow]
)
- 4 (ppr_expr pe expr)
+ 4 (ppr_expr pe expr <> semi)
ppr_alts pe (PrimAlts alts deflt)
- = ppAboves [ ppAboves (map ppr_alt alts), ppr_default pe deflt ]
+ = vcat [ vcat (map ppr_alt alts), ppr_default pe deflt ]
where
ppr_alt (lit, expr)
- = ppHang (ppCat [pLit pe lit, ppStr "->"])
- 4 (ppr_expr pe expr)
+ = hang (hsep [pLit pe lit, ptext SLIT("->")])
+ 4 (ppr_expr pe expr <> semi)
\end{code}
\begin{code}
-ppr_default pe NoDefault = ppNil
+ppr_default pe NoDefault = empty
ppr_default pe (BindDefault val_bdr expr)
- = ppHang (ppCat [pMinBndr pe val_bdr, ppStr "->"])
- 4 (ppr_expr pe expr)
+ = hang (hsep [pMinBndr pe val_bdr, ptext SLIT("->")])
+ 4 (ppr_expr pe expr <> semi)
\end{code}
\begin{code}
ppr_arg pe (LitArg lit) = pLit pe lit
ppr_arg pe (VarArg v) = pOcc pe v
-ppr_arg pe (TyArg ty) = pTy pe ty
+ppr_arg pe (TyArg ty) = ptext SLIT("_@_ ") <> pTy pe ty
ppr_arg pe (UsageArg use) = pUse pe use
\end{code}
and @pprCoreExpr@ functions.
\begin{code}
-pprBigCoreBinder sty binder
- = ppAboves [sig, pragmas, ppr sty binder]
- where
- sig = ifnotPprShowAll sty (
- ppHang (ppCat [ppr sty binder, ppStr "::"])
- 4 (ppr sty (idType binder)))
-
- pragmas =
- ifnotPprForUser sty
- (ppIdInfo sty binder False{-no specs, thanks-} id nullIdEnv
- (getIdInfo binder))
+pprBigCoreBinder sty binder = pprTypedCoreBinder sty binder
pprBabyCoreBinder sty binder
- = ppCat [ppr sty binder, pp_strictness]
+ = hsep [ppr sty binder, pp_strictness]
where
- pp_strictness
- = case (getIdStrictness binder) of
- NoStrictnessInfo -> ppNil
- BottomGuaranteed -> ppStr "{- _!_ -}"
- StrictnessInfo xx _ ->
- panic "PprCore:pp_strictness:StrictnessInfo:ToDo"
- -- ppStr ("{- " ++ (showList xx "") ++ " -}")
+ pp_strictness = ppStrictnessInfo sty (getIdStrictness binder)
pprTypedCoreBinder sty binder
- = ppBesides [ppLparen, ppCat [ppr sty binder,
- ppStr "::", ppr sty (idType binder)],
- ppRparen]
+ = hsep [ppr sty binder, ptext SLIT("::"), pprParendGenType sty (idType binder)]
+ -- The space before the :: is important; it helps the lexer
+ -- when reading inferfaces. Otherwise it would lex "a::b" as one thing.
\end{code}
projects / ghc-hetmet.git / blobdiff