%
-% (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 (
+ module HsBinds,
+ module HsDecls,
+ module HsExpr,
+ module HsImpExp,
+ module HsLit,
+ module HsPat,
+ module HsTypes,
+ module HsUtils,
+ Fixity, NewOrData,
- -- NB: don't reexport HsCore or HsPragmas;
- -- this module tells about "real Haskell"
-
- EXP_MODULE(HsSyn) ,
- EXP_MODULE(HsBinds) ,
- EXP_MODULE(HsDecls) ,
- EXP_MODULE(HsExpr) ,
- EXP_MODULE(HsImpExp) ,
- EXP_MODULE(HsLit) ,
- EXP_MODULE(HsMatches) ,
- EXP_MODULE(HsPat) ,
- EXP_MODULE(HsTypes)
+ HsModule(..), HsExtCore(..)
) where
-IMP_Ubiq()
+#include "HsVersions.h"
-- friends:
+import HsDecls
import HsBinds
-import HsDecls
import HsExpr
import HsImpExp
import HsLit
-import HsMatches
import HsPat
import HsTypes
-import HsPragmas ( ClassPragmas, ClassOpPragmas,
- DataPragmas, GenPragmas, InstancePragmas )
--- others:
-import FiniteMap ( FiniteMap )
-import Outputable ( ifPprShowAll, ifnotPprForUser, interpp'SP, Outputable(..) )
-import Pretty
-import SrcLoc ( SrcLoc )
-\end{code}
+import HscTypes ( DeprecTxt )
+import BasicTypes ( Fixity, NewOrData )
+import HsUtils
-@Fake@ is a placeholder type; for when tyvars and uvars aren't used.
-\begin{code}
-data Fake = Fake
-instance Eq Fake
-instance Outputable Fake
+-- others:
+import IfaceSyn ( IfaceBinding )
+import Outputable
+import SrcLoc ( Located(..), unLoc, noLoc )
+import Module ( Module )
+import Bag ( Bag, foldrBag )
\end{code}
All we actually declare here is the top-level structure for a module.
\begin{code}
-type Version = Int
-
-data HsModule tyvar uvar name pat
+data HsModule name
= HsModule
- Module -- module name
- (Maybe Version) -- source interface version number
- (Maybe [IE name]) -- export list; Nothing => export everything
- -- Just [] => export *nothing* (???)
+ (Maybe (Located Module))-- Nothing => "module X where" is omitted
+ -- (in which case the next field is Nothing too)
+ (Maybe [LIE name]) -- Export list; Nothing => export list omitted, so export everything
+ -- Just [] => export *nothing*
-- Just [...] => as you would expect...
- [ImportDecl name] -- We snaffle interesting stuff out of the
+ [LImportDecl name] -- We snaffle interesting stuff out of the
-- imported interfaces early on, adding that
-- info to TyDecls/etc; so this list is
-- often empty, downstream.
- [FixityDecl name]
- [TyDecl name]
- [SpecDataSig name] -- user pragmas that modify TyDecls
- [ClassDecl tyvar uvar name pat]
- [InstDecl tyvar uvar name pat]
- [SpecInstSig name] -- user pragmas that modify InstDecls
- [DefaultDecl name]
- (HsBinds tyvar uvar name pat) -- the main stuff, includes source sigs
- [Sig name] -- interface sigs
- SrcLoc
+ [LHsDecl name] -- Type, class, value, and interface signature decls
+ (Maybe DeprecTxt) -- reason/explanation for deprecation of this module
+
+data HsExtCore name -- Read from Foo.hcr
+ = HsExtCore
+ Module
+ [TyClDecl name] -- Type declarations only; just as in Haskell source,
+ -- so that we can infer kinds etc
+ [IfaceBinding] -- And the bindings
\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 (OutputableBndr name)
+ => Outputable (HsModule name) where
+
+ ppr (HsModule Nothing _ imports decls _)
+ = pp_nonnull imports $$ pp_nonnull decls
- ppr sty (HsModule name iface_version exports imports fixities
- typedecls typesigs classdecls instdecls instsigs
- defdecls binds sigs src_loc)
- = ppAboves [
- ifPprShowAll sty (ppr sty src_loc),
- ifnotPprForUser sty (pp_iface_version iface_version),
+ ppr (HsModule (Just name) exports imports decls deprec)
+ = vcat [
case exports of
- Nothing -> ppCat [ppPStr SLIT("module"), ppPStr name, ppPStr SLIT("where")]
- Just es -> ppAboves [
- ppCat [ppPStr SLIT("module"), ppPStr name, ppLparen],
- ppNest 8 (interpp'SP sty es),
- ppNest 4 (ppPStr SLIT(") where"))
+ Nothing -> pp_header (ptext SLIT("where"))
+ Just es -> vcat [
+ pp_header lparen,
+ nest 8 (fsep (punctuate comma (map ppr es))),
+ nest 4 (ptext SLIT(") where"))
],
pp_nonnull imports,
- pp_nonnull fixities,
- pp_nonnull typedecls,
- pp_nonnull typesigs,
- pp_nonnull classdecls,
- pp_nonnull instdecls,
- pp_nonnull instsigs,
- pp_nonnull defdecls,
- ppr sty binds,
- pp_nonnull sigs
+ pp_nonnull decls
]
where
- pp_nonnull [] = ppNil
- pp_nonnull xs = ppAboves (map (ppr sty) xs)
+ 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_iface_version Nothing = ppNil
- pp_iface_version (Just n) = ppCat [ppStr "{-# INTERFACE", ppInt n, ppStr "#-}"]
+pp_nonnull [] = empty
+pp_nonnull xs = vcat (map ppr xs)
\end{code}
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