%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1996
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section{Haskell abstract syntax definition}
therefore, is almost nothing but re-exporting.
\begin{code}
-#include "HsVersions.h"
-
module HsSyn (
- -- NB: don't reexport HsCore or HsPragmas;
+ -- NB: don't reexport HsCore
-- this module tells about "real Haskell"
- EXP_MODULE(HsSyn) ,
- EXP_MODULE(HsBinds) ,
- EXP_MODULE(HsDecls) ,
- EXP_MODULE(HsExpr) ,
- EXP_MODULE(HsImpExp) ,
- EXP_MODULE(HsBasic) ,
- EXP_MODULE(HsMatches) ,
- EXP_MODULE(HsPat) ,
- EXP_MODULE(HsTypes),
- Fixity, NewOrData, IfaceFlavour,
-
- collectTopBinders, collectMonoBinders
+ module HsSyn,
+ module HsBinds,
+ module HsDecls,
+ module HsExpr,
+ module HsImpExp,
+ module HsLit,
+ module HsPat,
+ module HsTypes,
+ Fixity, NewOrData,
+
+ collectHsBinders, collectLocatedHsBinders,
+ collectMonoBinders, collectLocatedMonoBinders,
+ hsModuleName, hsModuleImports
) where
-IMP_Ubiq()
+#include "HsVersions.h"
-- friends:
+import HsDecls
import HsBinds
-import HsDecls ( HsDecl(..), TyDecl(..), InstDecl(..), ClassDecl(..),
- DefaultDecl(..),
- FixityDecl(..),
- ConDecl(..), ConDetails(..), BangType(..),
- IfaceSig(..), HsIdInfo, SpecDataSig(..), SpecInstSig(..),
- hsDeclName
- )
import HsExpr
import HsImpExp
-import HsBasic
-import HsMatches
+import HsLit
import HsPat
import HsTypes
-import HsPragmas ( ClassPragmas, ClassOpPragmas,
- DataPragmas, GenPragmas, InstancePragmas )
-import HsCore
-import BasicTypes ( Fixity, SYN_IE(Version), NewOrData, IfaceFlavour )
+import BasicTypes ( Fixity, Version, NewOrData )
-- others:
-import FiniteMap ( FiniteMap )
-import Outputable ( ifPprShowAll, ifnotPprForUser, interpp'SP, Outputable(..) )
-import Pretty
+import Name ( NamedThing )
+import Outputable
import SrcLoc ( SrcLoc )
-import Bag
-#if __GLASGOW_HASKELL__ >= 202
-import Name
-#endif
-\end{code}
-
-@Fake@ is a placeholder type; for when tyvars and uvars aren't used.
-\begin{code}
-data Fake = Fake
-instance Eq Fake
-instance Outputable Fake
+import Module ( ModuleName )
\end{code}
All we actually declare here is the top-level structure for a module.
\begin{code}
-data HsModule tyvar uvar name pat
+data HsModule name pat
= HsModule
- Module -- module name
+ ModuleName -- module name
(Maybe Version) -- source interface version number
(Maybe [IE name]) -- export list; Nothing => export everything
-- Just [] => export *nothing* (???)
-- imported interfaces early on, adding that
-- info to TyDecls/etc; so this list is
-- often empty, downstream.
- [FixityDecl name]
- [HsDecl tyvar uvar name pat] -- Type, class, value, and interface signature decls
+ [HsDecl name pat] -- Type, class, value, and interface signature decls
+ (Maybe DeprecTxt) -- reason/explanation for deprecation of this module
SrcLoc
\end{code}
\begin{code}
-instance (NamedThing name, Outputable name, Outputable pat,
- Eq tyvar, Outputable tyvar, Eq uvar, Outputable uvar)
- => Outputable (HsModule tyvar uvar name pat) where
+instance (NamedThing name, Outputable name, Outputable pat)
+ => Outputable (HsModule name pat) where
- ppr sty (HsModule name iface_version exports imports fixities
- decls src_loc)
+ ppr (HsModule name iface_version exports imports
+ decls deprec src_loc)
= vcat [
- ifPprShowAll sty (ppr sty src_loc),
- ifnotPprForUser sty (pp_iface_version iface_version),
case exports of
- Nothing -> hsep [ptext SLIT("module"), ptext name, ptext SLIT("where")]
+ Nothing -> pp_header (ptext SLIT("where"))
Just es -> vcat [
- hsep [ptext SLIT("module"), ptext name, lparen],
- nest 8 (interpp'SP sty es),
+ pp_header lparen,
+ nest 8 (fsep (punctuate comma (map ppr es))),
nest 4 (ptext SLIT(") where"))
],
pp_nonnull imports,
- pp_nonnull fixities,
pp_nonnull decls
]
where
+ pp_header rest = case deprec of
+ Nothing -> pp_modname <+> rest
+ Just d -> vcat [ pp_modname, ppr d, rest ]
+
+ pp_modname = ptext SLIT("module") <+> ppr name
+
pp_nonnull [] = empty
- pp_nonnull xs = vcat (map (ppr sty) xs)
+ pp_nonnull xs = vcat (map ppr xs)
- pp_iface_version Nothing = empty
- pp_iface_version (Just n) = hsep [text "{-# INTERFACE", int n, text "#-}"]
+hsModuleName (HsModule mod_name _ _ _ _ _ _) = mod_name
+hsModuleImports (HsModule mod_name vers exports imports decls deprec src_loc) = imports
\end{code}
it should return @[x, y, f, a, b]@ (remember, order important).
\begin{code}
-collectTopBinders :: HsBinds tyvar uvar name (InPat name) -> Bag (name,SrcLoc)
-collectTopBinders EmptyBinds = emptyBag
-collectTopBinders (MonoBind b _ _) = collectMonoBinders b
-collectTopBinders (ThenBinds b1 b2)
- = collectTopBinders b1 `unionBags` collectTopBinders b2
-
-collectMonoBinders :: MonoBinds tyvar uvar name (InPat name) -> Bag (name,SrcLoc)
-collectMonoBinders EmptyMonoBinds = emptyBag
-collectMonoBinders (PatMonoBind pat grhss_w_binds loc) = listToBag (map (\v->(v,loc)) (collectPatBinders pat))
-collectMonoBinders (FunMonoBind f _ matches loc) = unitBag (f,loc)
-collectMonoBinders (VarMonoBind v expr) = error "collectMonoBinders"
-collectMonoBinders (CoreMonoBind v expr) = error "collectMonoBinders"
-collectMonoBinders (AndMonoBinds bs1 bs2)
- = collectMonoBinders bs1 `unionBags` collectMonoBinders bs2
+collectLocatedHsBinders :: HsBinds name (InPat name) -> [(name,SrcLoc)]
+collectLocatedHsBinders EmptyBinds = []
+collectLocatedHsBinders (MonoBind b _ _)
+ = collectLocatedMonoBinders b
+collectLocatedHsBinders (ThenBinds b1 b2)
+ = collectLocatedHsBinders b1 ++ collectLocatedHsBinders b2
+
+collectHsBinders :: HsBinds name (InPat name) -> [name]
+collectHsBinders EmptyBinds = []
+collectHsBinders (MonoBind b _ _)
+ = collectMonoBinders b
+collectHsBinders (ThenBinds b1 b2)
+ = collectHsBinders b1 ++ collectHsBinders b2
+
+collectLocatedMonoBinders :: MonoBinds name (InPat name) -> [(name,SrcLoc)]
+collectLocatedMonoBinders binds
+ = go binds []
+ where
+ go EmptyMonoBinds acc = acc
+ go (PatMonoBind pat _ loc) acc = map (\v->(v,loc)) (collectPatBinders pat) ++ acc
+ go (FunMonoBind f _ _ loc) acc = (f,loc) : acc
+ go (AndMonoBinds bs1 bs2) acc = go bs1 (go bs2 acc)
+
+collectMonoBinders :: MonoBinds name (InPat name) -> [name]
+collectMonoBinders binds
+ = go binds []
+ where
+ go EmptyMonoBinds acc = acc
+ go (PatMonoBind pat _ loc) acc = collectPatBinders pat ++ acc
+ go (FunMonoBind f _ _ loc) acc = f : acc
+ go (AndMonoBinds bs1 bs2) acc = go bs1 (go bs2 acc)
\end{code}
-
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