%
+% (c) The University of Glasgow 2006
% (c) The AQUA Project, Glasgow University, 1996-1998
%
-%************************************************************************
-%* *
-\section[PprCore]{Printing of Core syntax, including for interfaces}
-%* *
-%************************************************************************
+
+Printing of Core syntax
\begin{code}
+{-# OPTIONS -w #-}
+-- The above warning supression flag is a temporary kludge.
+-- While working on this module you are encouraged to remove it and fix
+-- any warnings in the module. See
+-- http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
+-- for details
+
module PprCore (
pprCoreExpr, pprParendExpr,
pprCoreBinding, pprCoreBindings, pprCoreAlt,
pprRules
) where
-#include "HsVersions.h"
-
import CoreSyn
-import CostCentre ( pprCostCentreCore )
-import Var ( Var )
-import Id ( Id, idType, isDataConWorkId_maybe, idArity,
- idInfo, globalIdDetails, isGlobalId, isExportedId
- )
-import Var ( TyVar, isTyVar, tyVarKind )
-import IdInfo ( IdInfo, megaSeqIdInfo,
- inlinePragInfo, occInfo, newDemandInfo,
- lbvarInfo, hasNoLBVarInfo,
- arityInfo, ppArityInfo,
- specInfo, pprNewStrictness,
- workerInfo, ppWorkerInfo,
- newStrictnessInfo, cafInfo, ppCafInfo, specInfoRules
- )
-import NewDemand ( isTop )
+import CostCentre
+import Var
+import Id
+import IdInfo
+import NewDemand
#ifdef OLD_STRICTNESS
-import Id ( idDemandInfo )
-import IdInfo ( cprInfo, ppCprInfo, strictnessInfo, ppStrictnessInfo )
+import Id
+import IdInfo
#endif
-import DataCon ( dataConTyCon )
-import TyCon ( tupleTyConBoxity, isTupleTyCon )
-import Type ( pprParendType, pprType, pprParendKind )
-import BasicTypes ( tupleParens, isNoOcc, isAlwaysActive )
-import Util ( lengthIs )
+import DataCon
+import TyCon
+import Type
+import Coercion
+import BasicTypes
+import Util
import Outputable
-import FastString ( mkFastString )
+import FastString
\end{code}
%************************************************************************
= ppr_binding (binder,expr) $$ text ""
pprTopBind (Rec binds)
- = vcat [ptext SLIT("Rec {"),
+ = vcat [ptext (sLit "Rec {"),
vcat (map ppr_binding binds),
- ptext SLIT("end Rec }"),
+ ptext (sLit "end Rec }"),
text ""]
\end{code}
-- The function adds parens in context that need
-- an atomic value (e.g. function args)
-ppr_expr add_par (Type ty) = add_par (ptext SLIT("TYPE") <+> ppr ty) -- Wierd
+ppr_expr add_par (Type ty) = add_par (ptext (sLit "TYPE") <+> ppr ty) -- Wierd
ppr_expr add_par (Var name) = ppr name
ppr_expr add_par (Lit lit) = ppr lit
+ppr_expr add_par (Cast expr co)
+ = add_par $
+ sep [pprParendExpr expr,
+ ptext (sLit "`cast`") <+> parens (pprCo co)]
+ where
+ pprCo co = sep [ppr co, dcolon <+> ppr (coercionKindPredTy co)]
+
+
ppr_expr add_par expr@(Lam _ _)
= let
(bndrs, body) = collectBinders expr
in
add_par $
- hang (ptext SLIT("\\") <+> sep (map (pprBndr LambdaBind) bndrs) <+> arrow)
+ hang (ptext (sLit "\\") <+> sep (map (pprBndr LambdaBind) bndrs) <+> arrow)
2 (pprCoreExpr body)
ppr_expr add_par expr@(App fun arg)
let
pp_args = sep (map pprArg args)
val_args = dropWhile isTypeArg args -- Drop the type arguments for tuples
- pp_tup_args = sep (punctuate comma (map pprArg val_args))
+ pp_tup_args = sep (punctuate comma (map pprCoreExpr val_args))
in
case fun of
Var f -> case isDataConWorkId_maybe f of
ppr_expr add_par (Case expr var ty [(con,args,rhs)])
= add_par $
- sep [sep [ptext SLIT("case") <+> pprCoreExpr expr,
+ sep [sep [ptext (sLit "case") <+> pprCoreExpr expr,
ifPprDebug (braces (ppr ty)),
- hsep [ptext SLIT("of"),
- ppr_bndr var,
- char '{',
- ppr_case_pat con args
- ]],
+ sep [ptext (sLit "of") <+> ppr_bndr var,
+ char '{' <+> ppr_case_pat con args]
+ ],
pprCoreExpr rhs,
char '}'
]
ppr_expr add_par (Case expr var ty alts)
= add_par $
- sep [sep [ptext SLIT("case")
+ sep [sep [ptext (sLit "case")
<+> pprCoreExpr expr
<+> ifPprDebug (braces (ppr ty)),
- ptext SLIT("of") <+> ppr_bndr var <+> char '{'],
+ ptext (sLit "of") <+> ppr_bndr var <+> char '{'],
nest 2 (sep (punctuate semi (map pprCoreAlt alts))),
char '}'
]
ppr_expr add_par (Let bind@(NonRec val_bdr rhs@(Let _ _)) body)
= add_par $
vcat [
- hsep [ptext SLIT("let {"), (pprBndr LetBind val_bdr $$ ppr val_bndr), equals],
+ hsep [ptext (sLit "let {"), (pprBndr LetBind val_bdr $$ ppr val_bndr), equals],
nest 2 (pprCoreExpr rhs),
- ptext SLIT("} in"),
+ ptext (sLit "} in"),
pprCoreExpr body ]
--}
ppr_expr add_par (Let bind@(NonRec val_bdr rhs) expr@(Let _ _))
= add_par
- (hang (ptext SLIT("let {"))
+ (hang (ptext (sLit "let {"))
2 (hsep [ppr_binding (val_bdr,rhs),
- ptext SLIT("} in")])
+ ptext (sLit "} in")])
$$
pprCoreExpr expr)
+-}
--- general case (recursive case, too)
+-- General case (recursive case, too)
ppr_expr add_par (Let bind expr)
= add_par $
- sep [hang (ptext keyword) 2 (ppr_bind bind),
- hang (ptext SLIT("} in ")) 2 (pprCoreExpr expr)]
+ sep [hang (ptext keyword) 2 (ppr_bind bind <+> ptext (sLit "} in")),
+ pprCoreExpr expr]
where
keyword = case bind of
- Rec _ -> SLIT("__letrec {")
- NonRec _ _ -> SLIT("let {")
+ Rec _ -> (sLit "letrec {")
+ NonRec _ _ -> (sLit "let {")
ppr_expr add_par (Note (SCC cc) expr)
= add_par (sep [pprCostCentreCore cc, pprCoreExpr expr])
-#ifdef DEBUG
-ppr_expr add_par (Note (Coerce to_ty from_ty) expr)
- = add_par $
- getPprStyle $ \ sty ->
- if debugStyle sty then
- sep [ptext SLIT("__coerce") <+>
- sep [pprParendType to_ty, pprParendType from_ty],
- pprParendExpr expr]
- else
- sep [hsep [ptext SLIT("__coerce"), pprParendType to_ty],
- pprParendExpr expr]
-#else
-ppr_expr add_par (Note (Coerce to_ty from_ty) expr)
- = add_par $
- sep [sep [ptext SLIT("__coerce"), nest 2 (pprParendType to_ty)],
- pprParendExpr expr]
-#endif
-
-ppr_expr add_par (Note InlineCall expr)
- = add_par (ptext SLIT("__inline_call") <+> pprParendExpr expr)
-
ppr_expr add_par (Note InlineMe expr)
- = add_par $ ptext SLIT("__inline_me") <+> pprParendExpr expr
+ = add_par $ ptext (sLit "__inline_me") <+> pprParendExpr expr
ppr_expr add_par (Note (CoreNote s) expr)
= add_par $
- sep [sep [ptext SLIT("__core_note"), pprHsString (mkFastString s)],
+ sep [sep [ptext (sLit "__core_note"), pprHsString (mkFastString s)],
pprParendExpr expr]
pprCoreAlt (con, args, rhs)
tc = dataConTyCon dc
ppr_case_pat con args
- = ppr con <+> hsep (map ppr_bndr args) <+> arrow
+ = ppr con <+> sep (map ppr_bndr args) <+> arrow
where
ppr_bndr = pprBndr CaseBind
-pprArg (Type ty) = ptext SLIT("@") <+> pprParendType ty
+pprArg (Type ty) = ptext (sLit "@") <+> pprParendType ty
pprArg expr = pprParendExpr expr
\end{code}
-- Lambda bound type variables are preceded by "@"
pprCoreBinder LambdaBind bndr = parens (pprTypedBinder bndr)
--- Case bound things don't get a signature or a herald
-pprCoreBinder CaseBind bndr = pprUntypedBinder bndr
+-- Case bound things don't get a signature or a herald, unless we have debug on
+pprCoreBinder CaseBind bndr
+ = getPprStyle $ \ sty ->
+ if debugStyle sty then
+ parens (pprTypedBinder bndr)
+ else
+ pprUntypedBinder bndr
pprUntypedBinder binder
- | isTyVar binder = ptext SLIT("@") <+> ppr binder -- NB: don't print kind
+ | isTyVar binder = ptext (sLit "@") <+> ppr binder -- NB: don't print kind
| otherwise = pprIdBndr binder
pprTypedBinder binder
- | isTyVar binder = ptext SLIT("@") <+> pprTyVarBndr binder
+ | isTyVar binder = ptext (sLit "@") <+> pprTyVarBndr binder
| otherwise = pprIdBndr binder <+> dcolon <+> pprType (idType binder)
pprTyVarBndr :: TyVar -> SDoc
pprIdBndr id = ppr id <+> pprIdBndrInfo (idInfo id)
pprIdBndrInfo info
- = megaSeqIdInfo `seq` doc -- The seq is useful for poking on black holes
+ = megaSeqIdInfo info `seq` doc -- The seq is useful for poking on black holes
where
prag_info = inlinePragInfo info
occ_info = occInfo info
doc | no_info = empty
| otherwise
- = brackets $ hcat [ppr prag_info, ppr occ_info,
+ = brackets $ hsep [ppr prag_info, ppr occ_info,
ppr dmd_info, ppr lbv_info
#ifdef OLD_STRICTNESS
, ppr (demandInfo id)
\begin{code}
pprIdDetails :: Id -> SDoc
pprIdDetails id | isGlobalId id = ppr (globalIdDetails id)
- | isExportedId id = ptext SLIT("[Exported]")
+ | isExportedId id = ptext (sLit "[Exported]")
| otherwise = empty
ppIdInfo :: Id -> IdInfo -> SDoc
#endif
pprNewStrictness (newStrictnessInfo info),
if null rules then empty
- else ptext SLIT("RULES:") <+> vcat (map pprRule rules)
+ else ptext (sLit "RULES:") <+> vcat (map pprRule rules)
-- Inline pragma, occ, demand, lbvar info
-- printed out with all binders (when debug is on);
-- see PprCore.pprIdBndr
pprRule :: CoreRule -> SDoc
pprRule (BuiltinRule { ru_fn = fn, ru_name = name})
- = ptext SLIT("Built in rule for") <+> ppr fn <> colon <+> doubleQuotes (ftext name)
+ = ptext (sLit "Built in rule for") <+> ppr fn <> colon <+> doubleQuotes (ftext name)
pprRule (Rule { ru_name = name, ru_act = act, ru_fn = fn,
ru_bndrs = tpl_vars, ru_args = tpl_args,
ru_rhs = rhs })
- = doubleQuotes (ftext name) <+> ppr act <+>
- sep [
- ptext SLIT("__forall") <+> braces (sep (map pprTypedBinder tpl_vars)),
- nest 2 (ppr fn <+> sep (map pprArg tpl_args)),
- nest 2 (ptext SLIT("=") <+> pprCoreExpr rhs)
- ] <+> semi
+ = hang (doubleQuotes (ftext name) <+> ppr act)
+ 4 (sep [ptext (sLit "forall") <+> braces (sep (map pprTypedBinder tpl_vars)),
+ nest 2 (ppr fn <+> sep (map pprArg tpl_args)),
+ nest 2 (ptext (sLit "=") <+> pprCoreExpr rhs)
+ ])
\end{code}
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