%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
%
\section[PrefixToHS]{Support routines for converting ``prefix form'' to Haskell abstract syntax}
#include "HsVersions.h"
module PrefixToHs (
- cvBinds,
+ cvValSig,
cvClassOpSig,
cvInstDeclSig,
- cvInstDecls,
+ cvBinds,
cvMatches,
cvMonoBinds,
cvSepdBinds,
- cvValSig,
- sepDeclsForInterface,
sepDeclsForTopBinds,
sepDeclsIntoSigsAndBinds
) where
-IMPORT_Trace -- ToDo: rm
-import Pretty
+import Ubiq{-uitous-}
+
+import PrefixSyn -- and various syntaxen.
+import HsSyn
+import RdrHsSyn
+import HsPragmas ( noGenPragmas, noClassOpPragmas )
-import AbsSyn
-import HsCore -- ****** NEED TO SEE CONSTRUCTORS ******
-import HsPragmas -- ****** NEED TO SEE CONSTRUCTORS ******
-import Outputable
-import PrefixSyn
-import ProtoName -- ProtoName(..), etc.
import SrcLoc ( mkSrcLoc2 )
-import Util
+import Util ( mapAndUnzip, panic, assertPanic )
\end{code}
%************************************************************************
%* *
%************************************************************************
-\begin{code}
-cvInstDecls :: Bool -> FAST_STRING -> FAST_STRING
- -> [FAST_STRING -> FAST_STRING -> Bool -> ProtoNameInstDecl] -- incomplete InstDecls
- -> [ProtoNameInstDecl]
-
-cvInstDecls from_here orig_modname informant_modname decls
- = [ decl_almost orig_modname informant_modname from_here
- | decl_almost <- decls ]
-\end{code}
-
We make a point not to throw any user-pragma ``sigs'' at
these conversion functions:
\begin{code}
cvValSig, cvClassOpSig, cvInstDeclSig :: SigConverter
-cvValSig (RdrTySig vars poly_ty pragmas src_loc)
- = [ Sig v poly_ty (cvt_pragmas pragmas) src_loc | v <- vars ]
- where
- cvt_pragmas RdrNoPragma = NoGenPragmas
- cvt_pragmas (RdrGenPragmas ps) = ps
+cvValSig (RdrTySig vars poly_ty src_loc)
+ = [ Sig v poly_ty noGenPragmas src_loc | v <- vars ]
-cvClassOpSig (RdrTySig vars poly_ty pragmas src_loc)
- = [ ClassOpSig v poly_ty (cvt_pragmas pragmas) src_loc | v <- vars ]
- where
- cvt_pragmas RdrNoPragma = NoClassOpPragmas
- cvt_pragmas (RdrClassOpPragmas ps) = ps
+cvClassOpSig (RdrTySig vars poly_ty src_loc)
+ = [ ClassOpSig v poly_ty noClassOpPragmas src_loc | v <- vars ]
-cvInstDeclSig (RdrInlineValSig sig) = [ sig ]
-cvInstDeclSig (RdrDeforestSig sig) = [ sig ]
-cvInstDeclSig (RdrMagicUnfoldingSig sig) = [ sig ]
+cvInstDeclSig (RdrSpecValSig sigs) = sigs
+cvInstDeclSig (RdrInlineValSig sig) = [ sig ]
+cvInstDeclSig (RdrDeforestSig sig) = [ sig ]
+cvInstDeclSig (RdrMagicUnfoldingSig sig) = [ sig ]
\end{code}
%************************************************************************
%* *
-\subsection[cvBinds-etc]{Converting to @Binds@, @MonoBinds@, etc.}
+\subsection[cvBinds-etc]{Converting to @HsBinds@, @MonoBinds@, etc.}
%* *
%************************************************************************
analyser.
\begin{code}
-cvBinds :: SrcFile -> SigConverter -> RdrBinding -> ProtoNameBinds
+cvBinds :: SrcFile -> SigConverter -> RdrBinding -> RdrNameHsBinds
cvBinds sf sig_cvtr raw_binding
= cvSepdBinds sf sig_cvtr (sepDeclsForBinds raw_binding)
-cvSepdBinds :: SrcFile -> SigConverter -> [RdrBinding] -> ProtoNameBinds
+cvSepdBinds :: SrcFile -> SigConverter -> [RdrBinding] -> RdrNameHsBinds
cvSepdBinds sf sig_cvtr bindings
= case (mkMonoBindsAndSigs sf sig_cvtr bindings) of { (mbs, sigs) ->
if (null sigs)
else BindWith (RecBind mbs) sigs
}
-cvMonoBinds :: SrcFile -> [RdrBinding] -> ProtoNameMonoBinds
+cvMonoBinds :: SrcFile -> [RdrBinding] -> RdrNameMonoBinds
cvMonoBinds sf bindings
= case (mkMonoBindsAndSigs sf bottom bindings) of { (mbs,sigs) ->
if (null sigs)
mkMonoBindsAndSigs :: SrcFile
-> SigConverter
-> [RdrBinding]
- -> (ProtoNameMonoBinds, [ProtoNameSig])
+ -> (RdrNameMonoBinds, [RdrNameSig])
mkMonoBindsAndSigs sf sig_cvtr fbs
= foldl mangle_bind (EmptyMonoBinds, []) fbs
-- function. Otherwise there is only one pattern, which is paired
-- with a guarded right hand side.
- mangle_bind (b_acc, s_acc) sig@(RdrTySig _ _ _ _)
+ mangle_bind (b_acc, s_acc) sig@(RdrTySig _ _ _)
= (b_acc, s_acc ++ sig_cvtr sig)
mangle_bind (b_acc, s_acc) (RdrSpecValSig sig) = (b_acc, sig ++ s_acc)
mangle_bind (b_acc, s_acc) (RdrMagicUnfoldingSig sig) = (b_acc, sig : s_acc)
mangle_bind (b_acc, s_acc)
- (RdrPatternBinding lousy_srcline [patbinding@(RdrMatch good_srcline _ _ _ _)])
+ (RdrPatternBinding lousy_srcline [patbinding])
-- WDP: the parser has trouble getting a good line-number on RdrPatternBindings.
= case (cvPatMonoBind sf patbinding) of { (pat, grhss, binds) ->
let
(b_acc `AndMonoBinds`
PatMonoBind pat (GRHSsAndBindsIn grhss binds) src_loc, s_acc)
}
+ where
+ good_srcline = case patbinding of
+ RdrMatch_NoGuard ln _ _ _ _ -> ln
+ RdrMatch_Guards ln _ _ _ _ -> ln
+
mangle_bind _ (RdrPatternBinding _ _)
= panic "mangleBinding: more than one pattern on a RdrPatternBinding"
mangle_bind (b_acc, s_acc) (RdrFunctionBinding srcline patbindings)
-- must be a function binding...
- = case (cvFunMonoBind sf patbindings) of { (var, matches) ->
+ = case (cvFunMonoBind sf patbindings) of { (var, inf, matches) ->
(b_acc `AndMonoBinds`
- FunMonoBind var matches (mkSrcLoc2 sf srcline), s_acc)
+ FunMonoBind var inf matches (mkSrcLoc2 sf srcline), s_acc)
}
\end{code}
\begin{code}
-cvPatMonoBind :: SrcFile -> RdrMatch -> (ProtoNamePat, [ProtoNameGRHS], ProtoNameBinds)
+cvPatMonoBind :: SrcFile -> RdrMatch -> (RdrNamePat, [RdrNameGRHS], RdrNameHsBinds)
-cvPatMonoBind sf (RdrMatch srcline srcfun pat guardedexprs binding)
- = (pat, cvGRHSs srcfun sf srcline guardedexprs, cvBinds sf cvValSig binding)
+cvPatMonoBind sf (RdrMatch_NoGuard srcline srcfun pat expr binding)
+ = (pat, [OtherwiseGRHS expr (mkSrcLoc2 sf srcline)], cvBinds sf cvValSig binding)
+
+cvPatMonoBind sf (RdrMatch_Guards srcline srcfun pat guardedexprs binding)
+ = (pat, map (cvGRHS sf srcline) guardedexprs, cvBinds sf cvValSig binding)
+
+cvFunMonoBind :: SrcFile -> [RdrMatch] -> (RdrName {-VarName-}, Bool {-InfixDefn-}, [RdrNameMatch])
+
+cvFunMonoBind sf matches
+ = (head srcfuns, head infixdefs, cvMatches sf False matches)
+ where
+ (srcfuns, infixdefs) = mapAndUnzip get_mdef matches
+ -- ToDo: Check for consistent srcfun and infixdef
-cvFunMonoBind :: SrcFile -> [RdrMatch] -> (ProtoName {-VarName-}, [ProtoNameMatch])
+ get_mdef (RdrMatch_NoGuard _ sfun pat _ _) = get_pdef pat
+ get_mdef (RdrMatch_Guards _ sfun pat _ _) = get_pdef pat
-cvFunMonoBind sf matches@((RdrMatch srcline srcfun pat guardedexprs binding):_)
- = ( Unk srcfun, -- cheating ...
- cvMatches sf False matches )
+ get_pdef (ConPatIn fn _) = (fn, False)
+ get_pdef (ConOpPatIn _ op _) = (op, True)
+ get_pdef (ParPatIn pat) = get_pdef pat
-cvMatches :: SrcFile -> Bool -> [RdrMatch] -> [ProtoNameMatch]
-cvMatch :: SrcFile -> Bool -> RdrMatch -> ProtoNameMatch
+
+cvMatches :: SrcFile -> Bool -> [RdrMatch] -> [RdrNameMatch]
+cvMatch :: SrcFile -> Bool -> RdrMatch -> RdrNameMatch
cvMatches sf is_case matches = map (cvMatch sf is_case) matches
-cvMatch sf is_case (RdrMatch srcline srcfun pat guardedexprs binding)
+cvMatch sf is_case rdr_match
= foldr PatMatch
- (GRHSMatch (GRHSsAndBindsIn (cvGRHSs srcfun sf srcline guardedexprs)
- (cvBinds sf cvValSig binding)))
+ (GRHSMatch (GRHSsAndBindsIn guarded_exprs (cvBinds sf cvValSig binding)))
-- For a FunMonoBinds, the first flattened "pattern" is
-- just the function name, and we don't want to keep it.
-- For a case expr, it's (presumably) a constructor name -- and
-- we most certainly want to keep it! Hence the monkey busines...
--- (trace ("cvMatch:"++(ppShow 80 (ppr PprDebug pat))) (
(if is_case then -- just one pattern: leave it untouched...
- [pat']
- else
- case pat' of
- ConPatIn _ pats -> pats
+ [pat]
+ else -- function pattern; extract arg patterns...
+ case pat of ConPatIn fn pats -> pats
+ ConOpPatIn p1 op p2 -> [p1,p2]
+ ParPatIn pat -> panic "PrefixToHs.cvMatch:ParPatIn"
)
--- ))
where
- pat' = doctor_pat pat
-
- -- a ConOpPatIn in the corner may be handled by converting it to
- -- ConPatIn...
-
- doctor_pat (ConOpPatIn p1 op p2) = ConPatIn op [p1, p2]
- doctor_pat other_pat = other_pat
-
-cvGRHSs :: FAST_STRING -> SrcFile -> SrcLine -> [(ProtoNameExpr, ProtoNameExpr)] -> [ProtoNameGRHS]
+ (pat, binding, guarded_exprs)
+ = case rdr_match of
+ RdrMatch_NoGuard ln b c expr d -> (c,d, [OtherwiseGRHS expr (mkSrcLoc2 sf ln)])
+ RdrMatch_Guards ln b c gd_exps d -> (c,d, map (cvGRHS sf ln) gd_exps)
-cvGRHSs sfun sf sl guarded_exprs = map (cvGRHS sfun sf sl) guarded_exprs
-
-cvGRHS :: FAST_STRING -> SrcFile -> SrcLine -> (ProtoNameExpr, ProtoNameExpr) -> ProtoNameGRHS
-
-cvGRHS sfun sf sl (Var v@(Unk str), e)
- | str == SLIT("__o") -- "__otherwise" ToDo: de-urgh-ify
- = OtherwiseGRHS e (mkSrcLoc2 sf sl)
-
-cvGRHS sfun sf sl (g, e)
- = GRHS g e (mkSrcLoc2 sf sl)
+cvGRHS :: SrcFile -> SrcLine -> (RdrNameHsExpr, RdrNameHsExpr) -> RdrNameGRHS
+cvGRHS sf sl (g, e) = GRHS g e (mkSrcLoc2 sf sl)
\end{code}
%************************************************************************
Separate declarations into all the various kinds:
\begin{display}
-tys RdrTyData RdrTySynonym
-type "sigs" RdrAbstractTypeSig RdrSpecDataSig
+tys RdrTyDecl
+ty "sigs" RdrSpecDataSig
classes RdrClassDecl
-instances RdrInstDecl
-instance "sigs" RdrSpecInstSig
+insts RdrInstDecl
+inst "sigs" RdrSpecInstSig
defaults RdrDefaultDecl
binds RdrFunctionBinding RdrPatternBinding RdrTySig
RdrSpecValSig RdrInlineValSig RdrDeforestSig
RdrMagicUnfoldingSig
-iimps RdrIfaceImportDecl (interfaces only)
\end{display}
This function isn't called directly; some other function calls it,
(Those functions follow...)
\begin{code}
-sepDecls (RdrTyData a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (a:tys,tysigs,classes,insts,instsigs,defaults,binds,iimps)
-
-sepDecls (RdrTySynonym a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (a:tys,tysigs,classes,insts,instsigs,defaults,binds,iimps)
+sepDecls (RdrTyDecl a)
+ tys tysigs classes insts instsigs defaults binds
+ = (a:tys,tysigs,classes,insts,instsigs,defaults,binds)
sepDecls a@(RdrFunctionBinding _ _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls a@(RdrPatternBinding _ _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
-- RdrAndBindings catered for below...
sepDecls (RdrClassDecl a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,a:classes,insts,instsigs,defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,a:classes,insts,instsigs,defaults,binds)
sepDecls (RdrInstDecl a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,a:insts,instsigs,defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,a:insts,instsigs,defaults,binds)
sepDecls (RdrDefaultDecl a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,a:defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,a:defaults,binds)
-sepDecls a@(RdrTySig _ _ _ _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
-
-sepDecls (RdrIfaceImportDecl a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,binds,a:iimps)
+sepDecls a@(RdrTySig _ _ _)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls a@(RdrSpecValSig _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls a@(RdrInlineValSig _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls a@(RdrDeforestSig _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls a@(RdrMagicUnfoldingSig _)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,a:binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,a:binds)
sepDecls (RdrSpecInstSig a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,a:instsigs,defaults,binds,iimps)
-
-sepDecls (RdrAbstractTypeSig a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,a:tysigs,classes,insts,instsigs,defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,a:instsigs,defaults,binds)
sepDecls (RdrSpecDataSig a)
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,a:tysigs,classes,insts,instsigs,defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,a:tysigs,classes,insts,instsigs,defaults,binds)
sepDecls RdrNullBind
- tys tysigs classes insts instsigs defaults binds iimps
- = (tys,tysigs,classes,insts,instsigs,defaults,binds,iimps)
+ tys tysigs classes insts instsigs defaults binds
+ = (tys,tysigs,classes,insts,instsigs,defaults,binds)
sepDecls (RdrAndBindings bs1 bs2)
- tys tysigs classes insts instsigs defaults binds iimps
- = case (sepDecls bs2 tys tysigs classes insts instsigs defaults binds iimps) of {
- (tys,tysigs,classes,insts,instsigs,defaults,binds,iimps) ->
- sepDecls bs1 tys tysigs classes insts instsigs defaults binds iimps
+ tys tysigs classes insts instsigs defaults binds
+ = case (sepDecls bs2 tys tysigs classes insts instsigs defaults binds) of {
+ (tys,tysigs,classes,insts,instsigs,defaults,binds) ->
+ sepDecls bs1 tys tysigs classes insts instsigs defaults binds
}
\end{code}
\begin{code}
sepDeclsForTopBinds binding
- = case (sepDecls binding [] [] [] [] [] [] [] [])
- of { (tys,tysigs,classes,insts,instsigs,defaults,binds,iimps) ->
- ASSERT (null iimps)
- (tys,tysigs,classes,insts,instsigs,defaults,binds)
- }
+ = sepDecls binding [] [] [] [] [] [] []
sepDeclsForBinds binding
- = case (sepDecls binding [] [] [] [] [] [] [] [])
- of { (tys,tysigs,classes,insts,instsigs,defaults,binds,iimps) ->
+ = case (sepDecls binding [] [] [] [] [] [] [])
+ of { (tys,tysigs,classes,insts,instsigs,defaults,binds) ->
ASSERT ((null tys)
&& (null tysigs)
&& (null classes)
&& (null insts)
&& (null instsigs)
- && (null defaults)
- && (null iimps))
+ && (null defaults))
binds
}
foldr sep_stuff ([],[]) sigs_and_binds
}
where
- sep_stuff s@(RdrTySig _ _ _ _) (sigs,defs) = (s:sigs,defs)
+ sep_stuff s@(RdrTySig _ _ _) (sigs,defs) = (s:sigs,defs)
+ sep_stuff s@(RdrSpecValSig _) (sigs,defs) = (s:sigs,defs)
sep_stuff s@(RdrInlineValSig _) (sigs,defs) = (s:sigs,defs)
sep_stuff s@(RdrDeforestSig _) (sigs,defs) = (s:sigs,defs)
sep_stuff s@(RdrMagicUnfoldingSig _) (sigs,defs) = (s:sigs,defs)
sep_stuff d@(RdrPatternBinding _ _) (sigs,defs) = (sigs,d:defs)
-sepDeclsForInterface binding
- = case (sepDecls binding [] [] [] [] [] [] [] [])
- of { (tys,tysigs,classes,insts,instsigs,defaults,sigs,iimps) ->
- ASSERT ((null defaults)
- && (null tysigs)
- && (null instsigs))
- ASSERT (not (not_all_sigs sigs))
- (tys,classes,insts,sigs,iimps)
- }
- where
- not_all_sigs sigs = not (all is_a_sig sigs)
-
- is_a_sig (RdrTySig _ _ _ _) = True
- is_a_sig anything_else = False
\end{code}
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