\begin{code}
module PprCore (
- pprCoreExpr, pprIfaceUnfolding,
- pprCoreBinding, pprCoreBindings, pprIdBndr
+ pprCoreExpr, pprParendExpr,
+ pprCoreBinding, pprCoreBindings, pprIdBndr,
+ pprCoreBinding, pprCoreBindings, pprCoreAlt,
+ pprCoreRules, pprCoreRule, pprIdCoreRule
) where
#include "HsVersions.h"
import CoreSyn
import CostCentre ( pprCostCentreCore )
-import Id ( idType, idInfo, getInlinePragma, getIdDemandInfo, Id )
+import Id ( Id, idType, isDataConId_maybe, idLBVarInfo, idArity,
+ idInfo, idInlinePragma, idDemandInfo, idOccInfo
+ )
import Var ( isTyVar )
-import IdInfo ( IdInfo,
- arityInfo, ppArityInfo,
- demandInfo, updateInfo, ppUpdateInfo, specInfo,
- strictnessInfo, ppStrictnessInfo, cafInfo, ppCafInfo
+import IdInfo ( IdInfo, megaSeqIdInfo,
+ arityInfo, ppArityInfo, ppFlavourInfo, flavourInfo,
+ specInfo, cprInfo, ppCprInfo,
+ strictnessInfo, ppStrictnessInfo, cafInfo, ppCafInfo,
+ cprInfo, ppCprInfo,
+ workerInfo, ppWorkerInfo,
+ tyGenInfo, ppTyGenInfo
)
-import Const ( Con(..), DataCon )
-import DataCon ( isTupleCon, isUnboxedTupleCon )
+import DataCon ( dataConTyCon )
+import TyCon ( tupleTyConBoxity, isTupleTyCon )
import PprType ( pprParendType, pprTyVarBndr )
-import SpecEnv ( specEnvToList )
+import BasicTypes ( tupleParens )
import PprEnv
import Outputable
\end{code}
pprCoreBindings :: [CoreBind] -> SDoc
pprCoreBinding :: CoreBind -> SDoc
pprCoreExpr :: CoreExpr -> SDoc
+pprParendExpr :: CoreExpr -> SDoc
pprCoreBindings = pprTopBinds pprCoreEnv
pprCoreBinding = pprTopBind pprCoreEnv
-pprCoreExpr = ppr_expr pprCoreEnv
+pprCoreExpr = ppr_noparend_expr pprCoreEnv
+pprParendExpr = ppr_parend_expr pprCoreEnv
+pprArg = ppr_arg pprCoreEnv
+pprCoreAlt = ppr_alt pprCoreEnv
pprCoreEnv = initCoreEnv pprCoreBinder
\end{code}
Printer for unfoldings in interfaces
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
\begin{code}
-pprIfaceUnfolding :: CoreExpr -> SDoc
-pprIfaceUnfolding = ppr_expr pprIfaceEnv
-
-pprIfaceEnv = initCoreEnv pprIfaceBinder
-\end{code}
-
-\begin{code}
instance Outputable b => Outputable (Bind b) where
ppr bind = ppr_bind pprGenericEnv bind
instance Outputable b => Outputable (Expr b) where
- ppr expr = ppr_expr pprGenericEnv expr
+ ppr expr = ppr_noparend_expr pprGenericEnv expr
pprGenericEnv :: Outputable b => PprEnv b
pprGenericEnv = initCoreEnv (\site -> ppr)
\begin{code}
initCoreEnv pbdr
= initPprEnv
- (Just ppr) -- Constants
(Just pprCostCentreCore) -- Cost centres
(Just ppr) -- tyvar occs
pprTopBinds pe binds = vcat (map (pprTopBind pe) binds)
pprTopBind pe (NonRec binder expr)
- = sep [ppr_binding_pe pe (binder,expr)] $$ text ""
+ = ppr_binding_pe pe (binder,expr) $$ text ""
pprTopBind pe (Rec binds)
= vcat [ptext SLIT("Rec {"),
ppr_binding_pe :: PprEnv b -> (b, Expr b) -> SDoc
ppr_binding_pe pe (val_bdr, expr)
= sep [pBndr pe LetBind val_bdr,
- nest 2 (equals <+> ppr_expr pe expr)]
+ nest 2 (equals <+> ppr_noparend_expr pe expr)]
\end{code}
\begin{code}
-ppr_parend_expr pe expr
- | no_parens = ppr_expr pe expr
- | otherwise = parens (ppr_expr pe expr)
- where
- no_parens = case expr of
- Var _ -> True
- Con con [] -> True
- Con (DataCon dc) _ -> isTupleCon dc
- _ -> False
+ppr_parend_expr pe expr = ppr_expr parens pe expr
+ppr_noparend_expr pe expr = ppr_expr noParens pe expr
+
+noParens :: SDoc -> SDoc
+noParens pp = pp
\end{code}
\begin{code}
-ppr_expr :: PprEnv b -> Expr b -> SDoc
-
-ppr_expr pe (Type ty) = ptext SLIT("TYPE") <+> ppr ty -- Wierd
-
-ppr_expr pe (Var name) = pOcc pe name
-
-ppr_expr pe (Con con [])
- = ppr con -- Nullary constructors too
-
-ppr_expr pe (Con (DataCon dc) args)
- -- Drop the type arguments and print in (a,b,c) notation
- | isTupleCon dc
- = parens (sep (punctuate comma (map (ppr_arg pe) (dropWhile isTypeArg args))))
- | isUnboxedTupleCon dc
- = text "(# " <>
- hsep (punctuate comma (map (ppr_arg pe) (dropWhile isTypeArg args))) <>
- text " #)"
+ppr_expr :: (SDoc -> SDoc) -> PprEnv b -> Expr b -> SDoc
+ -- The function adds parens in context that need
+ -- an atomic value (e.g. function args)
-ppr_expr pe (Con con args)
- = pCon pe con <+> (braces $ sep (map (ppr_arg pe) args))
+ppr_expr add_par pe (Type ty) = add_par (ptext SLIT("TYPE") <+> ppr ty) -- Wierd
+
+ppr_expr add_par pe (Var name) = pOcc pe name
+ppr_expr add_par pe (Lit lit) = ppr lit
-ppr_expr pe expr@(Lam _ _)
+ppr_expr add_par pe expr@(Lam _ _)
= let
(bndrs, body) = collectBinders expr
in
+ add_par $
hang (ptext SLIT("\\") <+> sep (map (pBndr pe LambdaBind) bndrs) <+> arrow)
- 4 (ppr_expr pe body)
-
-ppr_expr pe expr@(App fun arg)
- = let
- (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)
+ 2 (ppr_noparend_expr pe body)
+
+ppr_expr add_par pe expr@(App fun arg)
+ = case collectArgs expr of { (fun, args) ->
+ let
+ pp_args = sep (map (ppr_arg pe) args)
+ val_args = dropWhile isTypeArg args -- Drop the type arguments for tuples
+ pp_tup_args = sep (punctuate comma (map (ppr_arg pe) val_args))
in
- hang (ppr_parend_expr pe final_fun) 4 (sep (map (ppr_arg pe) final_args))
-
-ppr_expr pe (Case expr var [(con,args,rhs)])
- = sep [sep [ptext SLIT("case") <+> ppr_expr pe expr,
+ case fun of
+ Var f -> case isDataConId_maybe f of
+ -- Notice that we print the *worker*
+ -- for tuples in paren'd format.
+ Just dc | saturated && isTupleTyCon tc
+ -> tupleParens (tupleTyConBoxity tc) pp_tup_args
+ where
+ tc = dataConTyCon dc
+ saturated = length val_args == idArity f
+
+ other -> add_par (hang (pOcc pe f) 2 pp_args)
+
+ other -> add_par (hang (ppr_parend_expr pe fun) 2 pp_args)
+ }
+
+ppr_expr add_par pe (Case expr var [(con,args,rhs)])
+ = add_par $
+ sep [sep [ptext SLIT("case") <+> ppr_noparend_expr pe expr,
hsep [ptext SLIT("of"),
ppr_bndr var,
char '{',
ppr_case_pat pe con args
]],
- ppr_expr pe rhs,
+ ppr_noparend_expr pe rhs,
char '}'
]
where
ppr_bndr = pBndr pe CaseBind
-ppr_expr pe (Case expr var alts)
- = sep [sep [ptext SLIT("case") <+> ppr_expr pe expr,
+ppr_expr add_par pe (Case expr var alts)
+ = add_par $
+ sep [sep [ptext SLIT("case") <+> ppr_noparend_expr pe expr,
ptext SLIT("of") <+> ppr_bndr var <+> char '{'],
- nest 4 (sep (punctuate semi (map ppr_alt alts))),
+ nest 2 (sep (punctuate semi (map (ppr_alt pe) alts))),
char '}'
]
where
ppr_bndr = pBndr pe CaseBind
- ppr_alt (con, args, rhs) = hang (ppr_case_pat pe con args)
- 4 (ppr_expr pe rhs)
-- special cases: let ... in let ...
-- ("disgusting" SLPJ)
-ppr_expr pe (Let bind@(NonRec val_bdr rhs@(Let _ _)) body)
- = vcat [
+ppr_expr add_par pe (Let bind@(NonRec val_bdr rhs@(Let _ _)) body)
+ = add_par $
+ vcat [
hsep [ptext SLIT("let {"), pBndr pe LetBind val_bdr, equals],
- nest 2 (ppr_expr pe rhs),
+ nest 2 (ppr_noparend_expr pe rhs),
ptext SLIT("} in"),
- ppr_expr pe body ]
+ ppr_noparend_expr pe body ]
-ppr_expr pe (Let bind@(NonRec val_bdr rhs) expr@(Let _ _))
- = hang (ptext SLIT("let {"))
+ppr_expr add_par pe (Let bind@(NonRec val_bdr rhs) expr@(Let _ _))
+ = add_par
+ (hang (ptext SLIT("let {"))
2 (hsep [hang (hsep [pBndr pe LetBind val_bdr, equals])
- 4 (ppr_expr pe rhs),
+ 2 (ppr_noparend_expr pe rhs),
ptext SLIT("} in")])
- $$
- ppr_expr pe expr
+ $$
+ ppr_noparend_expr pe expr)
-- general case (recursive case, too)
-ppr_expr pe (Let bind expr)
- = sep [hang (ptext keyword) 2 (ppr_bind pe bind),
- hang (ptext SLIT("} in ")) 2 (ppr_expr pe expr)]
+ppr_expr add_par pe (Let bind expr)
+ = add_par $
+ sep [hang (ptext keyword) 2 (ppr_bind pe bind),
+ hang (ptext SLIT("} in ")) 2 (ppr_noparend_expr pe expr)]
where
keyword = case bind of
Rec _ -> SLIT("__letrec {")
NonRec _ _ -> SLIT("let {")
-ppr_expr pe (Note (SCC cc) expr)
- = sep [pSCC pe cc, ppr_expr pe expr]
+ppr_expr add_par pe (Note (SCC cc) expr)
+ = add_par (sep [pSCC pe cc, ppr_noparend_expr pe expr])
#ifdef DEBUG
-ppr_expr pe (Note (Coerce to_ty from_ty) expr)
- = \ sty ->
+ppr_expr add_par pe (Note (Coerce to_ty from_ty) expr)
+ = add_par $
+ getPprStyle $ \ sty ->
if debugStyle sty && not (ifaceStyle sty) then
- sep [hsep [ptext SLIT("__coerce"), pTy pe to_ty, pTy pe from_ty],
- ppr_parend_expr pe expr] sty
+ sep [ptext SLIT("__coerce") <+> sep [pTy pe to_ty, pTy pe from_ty],
+ ppr_parend_expr pe expr]
else
sep [hsep [ptext SLIT("__coerce"), pTy pe to_ty],
- ppr_parend_expr pe expr] sty
+ ppr_parend_expr pe expr]
#else
-ppr_expr pe (Note (Coerce to_ty from_ty) expr)
- = sep [hsep [ptext SLIT("__coerce"), pTy pe to_ty],
+ppr_expr add_par pe (Note (Coerce to_ty from_ty) expr)
+ = add_par $
+ sep [sep [ptext SLIT("__coerce"), nest 2 (pTy pe to_ty)],
ppr_parend_expr pe expr]
#endif
-ppr_expr pe (Note InlineCall expr)
- = ptext SLIT("__inline") <+> ppr_parend_expr pe expr
-
-ppr_case_pat pe con@(DataCon dc) args
- | isTupleCon dc
- = parens (hsep (punctuate comma (map ppr_bndr args))) <+> arrow
- | isUnboxedTupleCon dc
- = hsep [text "(# " <>
- hsep (punctuate comma (map ppr_bndr args)) <>
- text " #)",
- arrow]
+ppr_expr add_par pe (Note InlineCall expr)
+ = add_par (ptext SLIT("__inline_call") <+> ppr_parend_expr pe expr)
+
+ppr_expr add_par pe (Note InlineMe expr)
+ = add_par $ ptext SLIT("__inline_me") <+> ppr_parend_expr pe expr
+
+ppr_alt pe (con, args, rhs)
+ = hang (ppr_case_pat pe con args) 2 (ppr_noparend_expr pe rhs)
+
+ppr_case_pat pe con@(DataAlt dc) args
+ | isTupleTyCon tc
+ = tupleParens (tupleTyConBoxity tc) (hsep (punctuate comma (map ppr_bndr args))) <+> arrow
where
ppr_bndr = pBndr pe CaseBind
+ tc = dataConTyCon dc
ppr_case_pat pe con args
- = pCon pe con <+> hsep (map ppr_bndr args) <+> arrow
+ = ppr con <+> hsep (map ppr_bndr args) <+> arrow
where
ppr_bndr = pBndr pe CaseBind
= vcat [sig, pragmas, ppr binder]
where
sig = pprTypedBinder binder
- pragmas = ppIdInfo (idInfo binder)
+ pragmas = ppIdInfo binder (idInfo binder)
-- Lambda bound type variables are preceded by "@"
pprCoreBinder LambdaBind bndr = pprTypedBinder bndr
-- Case bound things don't get a signature or a herald
pprCoreBinder CaseBind bndr = pprUntypedBinder bndr
--- Used for printing interface-file unfoldings
-pprIfaceBinder CaseBind binder = pprUntypedBinder binder
-pprIfaceBinder other binder = pprTypedBinder binder
-
pprUntypedBinder binder
- | isTyVar binder = pprTyVarBndr binder
+ | isTyVar binder = ptext SLIT("@") <+> ppr binder -- NB: don't print kind
| otherwise = pprIdBndr binder
pprTypedBinder binder
-- It's important that the type is parenthesised too, at least when
-- printing interfaces, because we get \ x::(a->b) y::(c->d) -> ...
--- When printing any Id binder in debug mode, we print its inline pragma
-pprIdBndr id = ppr id <+> ifPprDebug (ppr (getInlinePragma id) <+> ppr (getIdDemandInfo id))
+-- pprIdBndr does *not* print the type
+-- When printing any Id binder in debug mode, we print its inline pragma and one-shot-ness
+pprIdBndr id = ppr id <+>
+ (megaSeqIdInfo (idInfo id) `seq`
+ -- Useful for poking on black holes
+ ifPprDebug (ppr (idInlinePragma id) <+> ppr (idOccInfo id) <+>
+ ppr (idDemandInfo id)) <+> ppr (idLBVarInfo id))
\end{code}
\begin{code}
-ppIdInfo :: IdInfo -> SDoc
-ppIdInfo info
+ppIdInfo :: Id -> IdInfo -> SDoc
+ppIdInfo b info
= hsep [
+ ppFlavourInfo (flavourInfo info),
ppArityInfo a,
- ppUpdateInfo u,
+ ppTyGenInfo g,
+ ppWorkerInfo (workerInfo info),
ppStrictnessInfo s,
- ppr d,
ppCafInfo c,
- ppSpecInfo p
- -- Inline pragma printed out with all binders; see PprCore.pprIdBndr
+ ppCprInfo m,
+ pprCoreRules b p
+ -- Inline pragma, occ, demand, lbvar info
+ -- printed out with all binders (when debug is on);
+ -- see PprCore.pprIdBndr
]
where
a = arityInfo info
- d = demandInfo info
+ g = tyGenInfo info
s = strictnessInfo info
- u = updateInfo info
c = cafInfo info
+ m = cprInfo info
p = specInfo info
\end{code}
+
\begin{code}
-ppSpecInfo spec_env
- = vcat (map pp_item (specEnvToList spec_env))
- where
- pp_item (tyvars, tys, rhs) = hsep [ptext SLIT("__P"),
- hsep (map pprParendType tys),
- ptext SLIT("->"),
- ppr head]
- where
- (_, body) = collectBinders rhs
- (head, _) = collectArgs body
+pprCoreRules :: Id -> CoreRules -> SDoc
+pprCoreRules var (Rules rules _) = vcat (map (pprCoreRule (ppr var)) rules)
+
+pprIdCoreRule :: IdCoreRule -> SDoc
+pprIdCoreRule (id,rule) = pprCoreRule (ppr id) rule
+
+pprCoreRule :: SDoc -> CoreRule -> SDoc
+pprCoreRule pp_fn (BuiltinRule _)
+ = ifPprDebug (ptext SLIT("A built in rule"))
+
+pprCoreRule pp_fn (Rule name tpl_vars tpl_args rhs)
+ = doubleQuotes (ptext name) <+>
+ sep [
+ ptext SLIT("__forall") <+> braces (sep (map pprTypedBinder tpl_vars)),
+ nest 2 (pp_fn <+> sep (map pprArg tpl_args)),
+ nest 2 (ptext SLIT("=") <+> pprCoreExpr rhs)
+ ] <+> semi
\end{code}
-
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