#include "HsVersions.h"
-import {-# SOURCE #-} HsExpr ( pprExpr, HsExpr )
-import {-# SOURCE #-} HsMatches ( pprMatches, Match, pprGRHSs, GRHSs )
+import {-# SOURCE #-} HsExpr ( HsExpr, pprExpr,
+ Match, pprFunBind,
+ GRHSs, pprPatBind )
-- friends:
+import HsImpExp ( pprHsVar )
+import HsPat ( Pat )
import HsTypes ( HsType )
-import CoreSyn ( CoreExpr )
-import PprCore () -- Instances for Outputable
+import PprCore ( {- instance Outputable (Expr a) -} )
--others:
-import Id ( Id )
-import NameSet ( NameSet, nameSetToList )
-import BasicTypes ( RecFlag(..), Fixity )
+import Name ( Name )
+import PrelNames ( isUnboundName )
+import NameSet ( NameSet, elemNameSet, nameSetToList )
+import BasicTypes ( RecFlag(..), FixitySig(..), Activation(..), IPName )
import Outputable
-import Bag
import SrcLoc ( SrcLoc )
import Var ( TyVar )
+import Class ( DefMeth (..) )
\end{code}
%************************************************************************
Collections of bindings, created by dependency analysis and translation:
\begin{code}
-data HsBinds id pat -- binders and bindees
+data HsBinds id -- binders and bindees
= EmptyBinds
-
- | ThenBinds (HsBinds id pat)
- (HsBinds id pat)
-
- | MonoBind (MonoBinds id pat)
- [Sig id] -- Empty on typechecker output
- RecFlag
+ | ThenBinds (HsBinds id) (HsBinds id)
+
+ | MonoBind -- A mutually recursive group
+ (MonoBinds id)
+ [Sig id] -- Empty on typechecker output, Type Signatures
+ RecFlag
+
+ | IPBinds -- Implcit parameters
+ -- Not allowed at top level
+ [(IPName id, HsExpr id)]
+ Bool -- True <=> this was a 'with' binding
+ -- (tmp, until 'with' is removed)
\end{code}
\begin{code}
-nullBinds :: HsBinds id pat -> Bool
+nullBinds :: HsBinds id -> Bool
nullBinds EmptyBinds = True
nullBinds (ThenBinds b1 b2) = nullBinds b1 && nullBinds b2
nullBinds (MonoBind b _ _) = nullMonoBinds b
+nullBinds (IPBinds b _) = null b
+
+mkMonoBind :: RecFlag -> MonoBinds id -> HsBinds id
+mkMonoBind _ EmptyMonoBinds = EmptyBinds
+mkMonoBind is_rec mbinds = MonoBind mbinds [] is_rec
\end{code}
\begin{code}
-instance (Outputable pat, Outputable id) =>
- Outputable (HsBinds id pat) where
+instance (OutputableBndr id) => Outputable (HsBinds id) where
ppr binds = ppr_binds binds
ppr_binds EmptyBinds = empty
ppr_binds (ThenBinds binds1 binds2)
- = ($$) (ppr_binds binds1) (ppr_binds binds2)
+ = ppr_binds binds1 $$ ppr_binds binds2
+
+ppr_binds (IPBinds binds is_with)
+ = sep (punctuate semi (map pp_item binds))
+ where
+ pp_item (id,rhs) = pprBndr LetBind id <+> equals <+> pprExpr rhs
+
ppr_binds (MonoBind bind sigs is_rec)
- = vcat [ifNotPprForUser (ptext rec_str),
+ = vcat [ppr_isrec,
vcat (map ppr sigs),
ppr bind
]
where
- rec_str = case is_rec of
- Recursive -> SLIT("{- rec -}")
- NonRecursive -> SLIT("{- nonrec -}")
+ ppr_isrec = getPprStyle $ \ sty ->
+ if userStyle sty then empty else
+ case is_rec of
+ Recursive -> ptext SLIT("{- rec -}")
+ NonRecursive -> ptext SLIT("{- nonrec -}")
\end{code}
%************************************************************************
Global bindings (where clauses)
\begin{code}
-data MonoBinds id pat
+data MonoBinds id
= EmptyMonoBinds
- | AndMonoBinds (MonoBinds id pat)
- (MonoBinds id pat)
-
- | PatMonoBind pat
- (GRHSs id pat)
+ | AndMonoBinds (MonoBinds id)
+ (MonoBinds id)
+
+ | FunMonoBind id -- Used for both functions f x = e
+ -- and variables f = \x -> e
+ -- Reason: the Match stuff lets us have an optional
+ -- result type sig f :: a->a = ...mentions a...
+ --
+ -- This also means that instance decls can only have
+ -- FunMonoBinds, so if you change this, you'll need to
+ -- change e.g. rnMethodBinds
+ Bool -- True => infix declaration
+ [Match id]
SrcLoc
- | FunMonoBind id
- Bool -- True => infix declaration
- [Match id pat]
+ | PatMonoBind (Pat id) -- The pattern is never a simple variable;
+ -- That case is done by FunMonoBind
+ (GRHSs id)
SrcLoc
| VarMonoBind id -- TRANSLATION
- (HsExpr id pat)
-
- | CoreMonoBind id -- TRANSLATION
- CoreExpr -- No zonking; this is a final CoreExpr with Ids and Types!
+ (HsExpr id)
| AbsBinds -- Binds abstraction; TRANSLATION
[TyVar] -- Type variables
[id] -- Dicts
[([TyVar], id, id)] -- (type variables, polymorphic, momonmorphic) triples
NameSet -- Set of *polymorphic* variables that have an INLINE pragma
- (MonoBinds id pat) -- The "business end"
+ (MonoBinds id) -- The "business end"
-- Creates bindings for *new* (polymorphic, overloaded) locals
-- in terms of *old* (monomorphic, non-overloaded) ones.
(fm,gm) -> fm
..ditto for gp..
- p = /\ [a,b] -> \ [d1,d2] -> letrec DBINDS and BIND
- in (fm,gm)
+ tp = /\ [a,b] -> \ [d1,d2] -> letrec DBINDS and BIND
+ in (fm,gm)
\begin{code}
-nullMonoBinds :: MonoBinds id pat -> Bool
+-- We keep the invariant that a MonoBinds is only empty
+-- if it is exactly EmptyMonoBinds
+nullMonoBinds :: MonoBinds id -> Bool
nullMonoBinds EmptyMonoBinds = True
-nullMonoBinds (AndMonoBinds bs1 bs2) = nullMonoBinds bs1 && nullMonoBinds bs2
nullMonoBinds other_monobind = False
-andMonoBinds :: MonoBinds id pat -> MonoBinds id pat -> MonoBinds id pat
+andMonoBinds :: MonoBinds id -> MonoBinds id -> MonoBinds id
andMonoBinds EmptyMonoBinds mb = mb
andMonoBinds mb EmptyMonoBinds = mb
andMonoBinds mb1 mb2 = AndMonoBinds mb1 mb2
-andMonoBindList :: [MonoBinds id pat] -> MonoBinds id pat
-andMonoBindList binds = foldr AndMonoBinds EmptyMonoBinds binds
+andMonoBindList :: [MonoBinds id] -> MonoBinds id
+andMonoBindList binds
+ = loop1 binds
+ where
+ loop1 [] = EmptyMonoBinds
+ loop1 (EmptyMonoBinds : binds) = loop1 binds
+ loop1 (b:bs) = loop2 b bs
+
+ -- acc is non-empty
+ loop2 acc [] = acc
+ loop2 acc (EmptyMonoBinds : bs) = loop2 acc bs
+ loop2 acc (b:bs) = loop2 (acc `AndMonoBinds` b) bs
\end{code}
+
\begin{code}
-instance (Outputable id, Outputable pat) =>
- Outputable (MonoBinds id pat) where
+instance OutputableBndr id => Outputable (MonoBinds id) where
ppr mbind = ppr_monobind mbind
-ppr_monobind :: (Outputable id, Outputable pat) => MonoBinds id pat -> SDoc
+ppr_monobind :: OutputableBndr id => MonoBinds id -> SDoc
ppr_monobind EmptyMonoBinds = empty
ppr_monobind (AndMonoBinds binds1 binds2)
= ppr_monobind binds1 $$ ppr_monobind binds2
-ppr_monobind (PatMonoBind pat grhss locn)
- = sep [ppr pat, nest 4 (pprGRHSs False grhss)]
-
-ppr_monobind (FunMonoBind fun inf matches locn)
- = pprMatches (False, ppr fun) matches
+ppr_monobind (PatMonoBind pat grhss locn) = pprPatBind pat grhss
+ppr_monobind (FunMonoBind fun inf matches locn) = pprFunBind fun matches
-- ToDo: print infix if appropriate
ppr_monobind (VarMonoBind name expr)
- = sep [ppr name <+> equals, nest 4 (pprExpr expr)]
-
-ppr_monobind (CoreMonoBind name expr)
- = sep [ppr name <+> equals, nest 4 (ppr expr)]
+ = sep [pprBndr LetBind name <+> equals, nest 4 (pprExpr expr)]
ppr_monobind (AbsBinds tyvars dictvars exports inlines val_binds)
= sep [ptext SLIT("AbsBinds"),
brackets (interpp'SP tyvars),
brackets (interpp'SP dictvars),
- brackets (interpp'SP exports),
+ brackets (sep (punctuate comma (map ppr exports))),
brackets (interpp'SP (nameSetToList inlines))]
$$
- nest 4 (ppr val_binds)
+ nest 4 ( vcat [pprBndr LetBind x | (_,x,_) <- exports]
+ -- Print type signatures
+ $$
+ ppr val_binds )
\end{code}
%************************************************************************
SrcLoc
| ClassOpSig name -- Selector name
- (Maybe name) -- Default-method name (if any)
+ (DefMeth name) -- Default-method info
+ -- See "THE NAMING STORY" in HsDecls
(HsType name)
SrcLoc
(HsType name) -- ... to these types
SrcLoc
- | InlineSig name -- INLINE f
- SrcLoc
-
- | NoInlineSig name -- NOINLINE f
+ | InlineSig Bool -- True <=> INLINE f, False <=> NOINLINE f
+ name -- Function name
+ Activation -- When inlining is *active*
SrcLoc
| SpecInstSig (HsType name) -- (Class tys); should be a specialisation of the
-- current instance decl
SrcLoc
- | FixSig (FixitySig name) -- Fixity declaration
-
-
-data FixitySig name = FixitySig name Fixity SrcLoc
+ | FixSig (FixitySig name) -- Fixity declaration
\end{code}
\begin{code}
-sigsForMe :: (name -> Bool) -> [Sig name] -> [Sig name]
-sigsForMe f sigs
- = filter sig_for_me sigs
- where
- sig_for_me (Sig n _ _) = f n
- sig_for_me (ClassOpSig n _ _ _) = f n
- sig_for_me (SpecSig n _ _) = f n
- sig_for_me (InlineSig n _) = f n
- sig_for_me (NoInlineSig n _) = f n
- sig_for_me (SpecInstSig _ _) = False
- sig_for_me (FixSig (FixitySig n _ _)) = f n
+okBindSig :: NameSet -> Sig Name -> Bool
+okBindSig ns (ClassOpSig _ _ _ _) = False
+okBindSig ns sig = sigForThisGroup ns sig
+
+okClsDclSig :: NameSet -> Sig Name -> Bool
+okClsDclSig ns (Sig _ _ _) = False
+okClsDclSig ns sig = sigForThisGroup ns sig
+
+okInstDclSig :: NameSet -> Sig Name -> Bool
+okInstDclSig ns (Sig _ _ _) = False
+okInstDclSig ns (FixSig _) = False
+okInstDclSig ns (SpecInstSig _ _) = True
+okInstDclSig ns sig = sigForThisGroup ns sig
+
+sigForThisGroup ns sig
+ = case sigName sig of
+ Nothing -> False
+ Just n | isUnboundName n -> True -- Don't complain about an unbound name again
+ | otherwise -> n `elemNameSet` ns
+
+sigName :: Sig name -> Maybe name
+sigName (Sig n _ _) = Just n
+sigName (ClassOpSig n _ _ _) = Just n
+sigName (SpecSig n _ _) = Just n
+sigName (InlineSig _ n _ _) = Just n
+sigName (FixSig (FixitySig n _ _)) = Just n
+sigName other = Nothing
isFixitySig :: Sig name -> Bool
isFixitySig (FixSig _) = True
isClassOpSig :: Sig name -> Bool
isClassOpSig (ClassOpSig _ _ _ _) = True
isClassOpSig _ = False
+
+isPragSig :: Sig name -> Bool
+ -- Identifies pragmas
+isPragSig (SpecSig _ _ _) = True
+isPragSig (InlineSig _ _ _ _) = True
+isPragSig (SpecInstSig _ _) = True
+isPragSig other = False
+\end{code}
+
+\begin{code}
+hsSigDoc (Sig _ _ loc) = (ptext SLIT("type signature"),loc)
+hsSigDoc (ClassOpSig _ _ _ loc) = (ptext SLIT("class-method type signature"), loc)
+hsSigDoc (SpecSig _ _ loc) = (ptext SLIT("SPECIALISE pragma"),loc)
+hsSigDoc (InlineSig True _ _ loc) = (ptext SLIT("INLINE pragma"),loc)
+hsSigDoc (InlineSig False _ _ loc) = (ptext SLIT("NOINLINE pragma"),loc)
+hsSigDoc (SpecInstSig _ loc) = (ptext SLIT("SPECIALISE instance pragma"),loc)
+hsSigDoc (FixSig (FixitySig _ _ loc)) = (ptext SLIT("fixity declaration"), loc)
\end{code}
\begin{code}
instance (Outputable name) => Outputable (Sig name) where
ppr sig = ppr_sig sig
-instance Outputable name => Outputable (FixitySig name) where
- ppr (FixitySig name fixity loc) = sep [ppr fixity, ppr name]
-
-
+ppr_sig :: Outputable name => Sig name -> SDoc
ppr_sig (Sig var ty _)
= sep [ppr var <+> dcolon, nest 4 (ppr ty)]
-ppr_sig (ClassOpSig var _ ty _)
- = sep [ppr var <+> dcolon, nest 4 (ppr ty)]
+ppr_sig (ClassOpSig var dm ty _)
+ = sep [ pprHsVar var <+> dcolon,
+ nest 4 (ppr ty),
+ nest 4 (pp_dm_comment) ]
+ where
+ pp_dm = case dm of
+ DefMeth _ -> equals -- Default method indicator
+ GenDefMeth -> semi -- Generic method indicator
+ NoDefMeth -> empty -- No Method at all
+ pp_dm_comment = case dm of
+ DefMeth _ -> text "{- has default method -}"
+ GenDefMeth -> text "{- has generic method -}"
+ NoDefMeth -> empty -- No Method at all
ppr_sig (SpecSig var ty _)
= sep [ hsep [text "{-# SPECIALIZE", ppr var, dcolon],
nest 4 (ppr ty <+> text "#-}")
]
-ppr_sig (InlineSig var _)
- = hsep [text "{-# INLINE", ppr var, text "#-}"]
+ppr_sig (InlineSig True var phase _)
+ = hsep [text "{-# INLINE", ppr phase, ppr var, text "#-}"]
-ppr_sig (NoInlineSig var _)
- = hsep [text "{-# NOINLINE", ppr var, text "#-}"]
+ppr_sig (InlineSig False var phase _)
+ = hsep [text "{-# NOINLINE", ppr phase, ppr var, text "#-}"]
ppr_sig (SpecInstSig ty _)
= hsep [text "{-# SPECIALIZE instance", ppr ty, text "#-}"]
ppr_sig (FixSig fix_sig) = ppr fix_sig
\end{code}
+Checking for distinct signatures; oh, so boring
+
+
+\begin{code}
+eqHsSig :: Sig Name -> Sig Name -> Bool
+eqHsSig (Sig n1 _ _) (Sig n2 _ _) = n1 == n2
+eqHsSig (InlineSig b1 n1 _ _)(InlineSig b2 n2 _ _) = b1 == b2 && n1 == n2
+
+eqHsSig (SpecInstSig ty1 _) (SpecInstSig ty2 _) = ty1 == ty2
+eqHsSig (SpecSig n1 ty1 _) (SpecSig n2 ty2 _) =
+ -- may have many specialisations for one value;
+ -- but not ones that are exactly the same...
+ (n1 == n2) && (ty1 == ty2)
+
+eqHsSig _other1 _other2 = False
+\end{code}
projects / ghc-hetmet.git / blobdiff