importDecl, recordSlurp,
getImportVersions, getSlurpedNames, getRnStats, getImportedFixities,
- checkUpToDate, loadHomeInterface,
+ checkUpToDate,
getDeclBinders,
mkSearchPath
import HsSyn ( HsDecl(..), TyClDecl(..), InstDecl(..), IfaceSig(..),
HsType(..), ConDecl(..), IE(..), ConDetails(..), Sig(..),
FixitySig(..),
- hsDeclName, countTyClDecls, isDataDecl, nonFixitySigs
+ hsDeclName, countTyClDecls, isDataDecl, isClassOpSig
)
import BasicTypes ( Version, NewOrData(..) )
import RdrHsSyn ( RdrNameHsDecl, RdrNameInstDecl, RdrNameTyClDecl,
fmToList
)
import Name ( Name {-instance NamedThing-},
- nameModule, moduleString, pprModule, isLocallyDefined,
- isWiredInName, maybeWiredInTyConName, pprModule,
- maybeWiredInIdName, nameUnique, NamedThing(..)
+ nameModule, isLocallyDefined,
+ isWiredInName, maybeWiredInTyConName,
+ maybeWiredInIdName, nameUnique, NamedThing(..),
+ pprEncodedFS
)
-import OccName ( Module, mkBootModule,
- moduleIfaceFlavour, bootFlavour, hiFile
+import Module ( Module, mkBootModule, moduleString, pprModule,
+ mkDynamicModule, moduleIfaceFlavour, bootFlavour, hiFile,
+ moduleUserString, moduleFS, setModuleFlavour
)
import RdrName ( RdrName, rdrNameOcc )
import NameSet
import IO ( isDoesNotExistError )
import List ( nub )
-
\end{code}
%*********************************************************
\begin{code}
-loadHomeInterface :: SDoc -> Name -> RnMG Ifaces
+loadHomeInterface :: SDoc -> Name -> RnMG (Module, Ifaces)
loadHomeInterface doc_str name
= loadInterface doc_str (nameModule name)
-loadInterface :: SDoc -> Module -> RnMG Ifaces
+loadInterface :: SDoc -> Module -> RnMG (Module, Ifaces)
loadInterface doc_str load_mod
= getIfacesRn `thenRn` \ ifaces ->
let
- new_hif = moduleIfaceFlavour load_mod
- this_mod = iMod ifaces
+ hi_boot_wanted = bootFlavour (moduleIfaceFlavour load_mod)
mod_map = iModMap ifaces
(insts, tycls_names) = iDefInsts ifaces
+
in
-- CHECK WHETHER WE HAVE IT ALREADY
case lookupFM mod_map load_mod of {
Just (existing_hif, _, _)
- | bootFlavour new_hif || not (bootFlavour existing_hif)
+ | hi_boot_wanted || not (bootFlavour existing_hif)
-> -- Already in the cache, and new version is no better than old,
-- so don't re-read it
- returnRn ifaces ;
+ returnRn (setModuleFlavour existing_hif load_mod, ifaces) ;
other ->
-- READ THE MODULE IN
findAndReadIface doc_str load_mod `thenRn` \ read_result ->
case read_result of {
- -- Check for not found
- Nothing -> -- Not found, so add an empty export env to the Ifaces map
+ Nothing | not hi_boot_wanted && load_mod `elem` thinAirModules
+ -> -- Hack alert! When compiling PrelBase we have to load the
+ -- decls for packCString# and friends; they are 'thin-air' Ids
+ -- (see PrelInfo.lhs). So if we don't find the HiFile we quietly
+ -- look for a .hi-boot file instead, and use that
+ --
+ -- NB this causes multiple "failed" attempts to read PrelPack,
+ -- which makes curious reading with -dshow-rn-trace, but
+ -- there's no harm done
+ loadInterface doc_str (mkBootModule load_mod)
+
+
+ | otherwise
+ -> -- Not found, so add an empty export env to the Ifaces map
-- so that we don't look again
let
new_mod_map = addToFM mod_map load_mod (hiFile, 0, [])
new_ifaces = ifaces { iModMap = new_mod_map }
in
setIfacesRn new_ifaces `thenRn_`
- failWithRn new_ifaces (noIfaceErr load_mod) ;
+ failWithRn (load_mod, new_ifaces) (noIfaceErr load_mod) ;
-- Found and parsed!
- Just (ParsedIface _ mod_vers usages exports rd_inst_mods rd_decls rd_insts) ->
+ Just (the_mod, ParsedIface mod_vers usages exports rd_inst_mods rd_decls rd_insts) ->
+
-- LOAD IT INTO Ifaces
-- First set the module
- setModuleRn load_mod $
-- NB: *first* we do loadDecl, so that the provenance of all the locally-defined
--- names is done correctly (notably, whether this is an .hi file or .hi-boot file).
-- If we do loadExport first the wrong info gets into the cache (unless we
-- explicitly tag each export which seems a bit of a bore)
+
+ getModuleRn `thenRn` \ this_mod ->
+ setModuleRn the_mod $ -- First set the module name of the module being loaded,
+ -- so that unqualified occurrences in the interface file
+ -- get the right qualifer
foldlRn loadDecl (iDecls ifaces) rd_decls `thenRn` \ new_decls ->
foldlRn loadFixDecl (iFixes ifaces) rd_decls `thenRn` \ new_fixities ->
- mapRn loadExport exports `thenRn` \ avails_s ->
foldlRn loadInstDecl insts rd_insts `thenRn` \ new_insts ->
+
+ mapRn (loadExport this_mod) exports `thenRn` \ avails_s ->
let
- mod_details = (new_hif, mod_vers, concat avails_s)
+ -- Notice: the 'flavour' of the loaded Module does not have to
+ -- be the same as the requested Module.
+ the_mod_hif = moduleIfaceFlavour the_mod
+ mod_details = (the_mod_hif, mod_vers, concat avails_s)
-- Exclude this module from the "special-inst" modules
new_inst_mods = iInstMods ifaces `unionLists` (filter (/= this_mod) rd_inst_mods)
- new_ifaces = ifaces { iModMap = addToFM mod_map load_mod mod_details,
+ new_ifaces = ifaces { iModMap = addToFM mod_map the_mod mod_details,
iDecls = new_decls,
iFixes = new_fixities,
iDefInsts = (new_insts, tycls_names),
iInstMods = new_inst_mods }
in
setIfacesRn new_ifaces `thenRn_`
- returnRn new_ifaces
+ returnRn (the_mod, new_ifaces)
}}
-loadExport :: ExportItem -> RnMG [AvailInfo]
-loadExport (mod, entities)
- = mapRn load_entity entities
+loadExport :: Module -> ExportItem -> RnMG [AvailInfo]
+loadExport this_mod (mod, entities)
+ | mod == this_mod = returnRn []
+ -- If the module exports anything defined in this module, just ignore it.
+ -- Reason: otherwise it looks as if there are two local definition sites
+ -- for the thing, and an error gets reported. Easiest thing is just to
+ -- filter them out up front. This situation only arises if a module
+ -- imports itself, or another module that imported it. (Necessarily,
+ -- this invoves a loop.) Consequence: if you say
+ -- module A where
+ -- import B( AType )
+ -- type AType = ...
+ --
+ -- module B( AType ) where
+ -- import {-# SOURCE #-} A( AType )
+ --
+ -- then you'll get a 'B does not export AType' message. A bit bogus
+ -- but it's a bogus thing to do!
+
+ | otherwise
+ = setModuleFlavourRn mod `thenRn` \ mod' ->
+ mapRn (load_entity mod') entities
where
- new_name occ = newImportedGlobalName mod occ
+ new_name mod occ = newImportedGlobalName mod occ
- load_entity (Avail occ)
- = new_name occ `thenRn` \ name ->
+ load_entity mod (Avail occ)
+ = new_name mod occ `thenRn` \ name ->
returnRn (Avail name)
- load_entity (AvailTC occ occs)
- = new_name occ `thenRn` \ name ->
- mapRn new_name occs `thenRn` \ names ->
+ load_entity mod (AvailTC occ occs)
+ = new_name mod occ `thenRn` \ name ->
+ mapRn (new_name mod) occs `thenRn` \ names ->
returnRn (AvailTC name names)
pprModule mod_name]) `thenRn_`
returnRn False
- Just (ParsedIface _ _ usages _ _ _ _)
+ Just (_, ParsedIface _ usages _ _ _ _)
-> -- Found it, so now check it
checkModUsage usages
where
checkModUsage [] = returnRn True -- Yes! Everything is up to date!
checkModUsage ((mod, old_mod_vers, whats_imported) : rest)
- = loadInterface doc_str mod `thenRn` \ ifaces ->
+ = loadInterface doc_str mod `thenRn` \ (mod, ifaces) ->
let
maybe_new_mod_vers = lookupFM (iModMap ifaces) mod
Just (_, new_mod_vers, _) = maybe_new_mod_vers
getNonWiredInDecl :: Name -> SrcLoc -> RnMode -> RnMG (Maybe RdrNameHsDecl)
getNonWiredInDecl needed_name loc mode
= traceRn doc_str `thenRn_`
- loadHomeInterface doc_str needed_name `thenRn` \ ifaces ->
+ loadHomeInterface doc_str needed_name `thenRn` \ (_, ifaces) ->
case lookupNameEnv (iDecls ifaces) needed_name of
-- Special case for data/newtype type declarations
%*********************************************************
\begin{code}
-getInterfaceExports :: Module -> RnMG Avails
+getInterfaceExports :: Module -> RnMG (Module, Avails)
getInterfaceExports mod
- = loadInterface doc_str mod `thenRn` \ ifaces ->
+ = loadInterface doc_str mod `thenRn` \ (mod, ifaces) ->
case lookupFM (iModMap ifaces) mod of
Nothing -> -- Not there; it must be that the interface file wasn't found;
-- the error will have been reported already.
-- (Actually loadInterface should put the empty export env in there
-- anyway, but this does no harm.)
- returnRn []
+ returnRn (mod, [])
- Just (_, _, avails) -> returnRn avails
+ Just (_, _, avails) -> returnRn (mod, avails)
where
doc_str = sep [pprModule mod, ptext SLIT("is directly imported")]
\end{code}
version
avail@(AvailTC tycon_name _)
ty_decl@(TyData new_or_data context tycon tyvars condecls derivings pragmas src_loc)
- | needed_name == tycon_name
- && opt_PruneTyDecls
+ | null condecls ||
+ -- HACK ALERT! If the data type is abstract then it must from a
+ -- hand-written hi-boot file. We put it in the deferred pile unconditionally,
+ -- because we don't want to read it in, and then later find a decl for a constructor
+ -- from that type, read the real interface file, and read in the full data type
+ -- decl again!!!
+
+ (needed_name == tycon_name
+ && opt_PruneTyDecls
-- don't prune newtypes, as the code generator may
-- want to peer inside a newtype type constructor
-- (ClosureInfo.fun_result_ty is the culprit.)
- && not (new_or_data == NewType)
- && not (nameUnique needed_name `elem` cCallishTyKeys)
+ && not (new_or_data == NewType)
+ && not (nameUnique needed_name `elem` cCallishTyKeys))
-- Hack! Don't prune these tycons whose constructors
-- the desugarer must be able to see when desugaring
-- a CCall. Ugh!
getImportedInstDecls
= -- First load any special-instance modules that aren't aready loaded
getSpecialInstModules `thenRn` \ inst_mods ->
- mapRn load_it inst_mods `thenRn_`
+ mapRn_ load_it inst_mods `thenRn_`
-- Now we're ready to grab the instance declarations
-- Find the un-gated ones and return them,
= getIfacesRn `thenRn` \ ifaces ->
returnRn (iInstMods ifaces)
-getImportedFixities :: RnMG FixityEnv
-getImportedFixities
- = getIfacesRn `thenRn` \ ifaces ->
+getImportedFixities :: GlobalRdrEnv -> RnMG FixityEnv
+ -- Get all imported fixities
+ -- We first make sure that all the home modules
+ -- of all in-scope variables are loaded.
+getImportedFixities gbl_env
+ = let
+ home_modules = [ nameModule name | names <- rdrEnvElts gbl_env,
+ name <- names,
+ not (isLocallyDefined name)
+ ]
+ in
+ mapRn_ load (nub home_modules) `thenRn_`
+
+ -- Now we can snaffle the fixity env
+ getIfacesRn `thenRn` \ ifaces ->
returnRn (iFixes ifaces)
+ where
+ load mod = loadInterface doc_str mod
+ where
+ doc_str = ptext SLIT("Need fixities from") <+> ppr mod
\end{code}
-- Record the names for the class ops
let
- -- ignoring fixity declarations
- nonfix_sigs = nonFixitySigs sigs
+ -- just want class-op sigs
+ op_sigs = filter isClassOpSig sigs
in
- mapRn (getClassOpNames new_name) nonfix_sigs `thenRn` \ sub_names ->
+ mapRn (getClassOpNames new_name) op_sigs `thenRn` \ sub_names ->
returnRn (Just (AvailTC class_name (class_name : sub_names)))
%*********************************************************
\begin{code}
-findAndReadIface :: SDoc -> Module -> RnMG (Maybe ParsedIface)
+findAndReadIface :: SDoc -> Module -> RnMG (Maybe (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-- one for 'normal' ones, the other for .hi-boot files,
-- hence the need to signal which kind we're interested.
getModuleHiMap from_hi_boot `thenRn` \ himap ->
- case (lookupFM himap (moduleString mod_name)) of
+ case (lookupFM himap (moduleUserString mod_name)) of
-- Found the file
- Just fpath -> readIface fpath
- -- Hack alert! When compiling PrelBase we have to load the
- -- decls for packCString# and friends; they are 'thin-air' Ids
- -- (see PrelInfo.lhs). So if we don't find the HiFile we quietly
- -- look for a .hi-boot file instead, and use that
- Nothing | not from_hi_boot && mod_name `elem` thinAirModules
- -> findAndReadIface doc_str (mkBootModule mod_name)
- | otherwise
- -> traceRn (ptext SLIT("...failed")) `thenRn_`
- returnRn Nothing
+ Just fpath -> readIface mod_name fpath
+ Nothing -> traceRn (ptext SLIT("...failed")) `thenRn_`
+ returnRn Nothing
where
hif = moduleIfaceFlavour mod_name
from_hi_boot = bootFlavour hif
@readIface@ tries just the one file.
\begin{code}
-readIface :: String -> RnMG (Maybe ParsedIface)
+readIface :: Module -> (String, Bool) -> RnMG (Maybe (Module, ParsedIface))
-- Nothing <=> file not found, or unreadable, or illegible
-- Just x <=> successfully found and parsed
-readIface file_path
+readIface requested_mod (file_path, is_dll)
= ioToRnMG (hGetStringBuffer file_path) `thenRn` \ read_result ->
case read_result of
Right contents ->
case parseIface contents (mkSrcLoc (mkFastString file_path) 1) of
- Failed err -> failWithRn Nothing err
- Succeeded (PIface iface) ->
- if opt_D_show_rn_imports then
- putDocRn (hcat[ptext SLIT("Read "), text file_path]) `thenRn_`
- returnRn (Just iface)
- else
- returnRn (Just iface)
-
- Left err ->
- if isDoesNotExistError err then
- returnRn Nothing
- else
- failWithRn Nothing (cannaeReadFile file_path err)
+ Failed err -> failWithRn Nothing err
+ Succeeded (PIface mod_nm iface) ->
+ (if mod_nm /= moduleFS requested_mod then
+ addWarnRn (hsep [ ptext SLIT("Something is amiss; requested module name")
+ , pprModule requested_mod
+ , ptext SLIT("differs from name found in the interface file ")
+ , pprEncodedFS mod_nm
+ ])
+ else
+ returnRn ()) `thenRn_`
+ let
+ the_mod
+ | is_dll = mkDynamicModule requested_mod
+ | otherwise = requested_mod
+ in
+ if opt_D_show_rn_imports then
+ putDocRn (hcat[ptext SLIT("Read module "), pprEncodedFS mod_nm,
+ ptext SLIT(" from "), text file_path]) `thenRn_`
+ returnRn (Just (the_mod, iface))
+ else
+ returnRn (Just (the_mod, iface))
+
+ Left err
+ | isDoesNotExistError err -> returnRn Nothing
+ | otherwise -> failWithRn Nothing (cannaeReadFile file_path err)
+
\end{code}
%*********************************************************
\begin{code}
mkSearchPath :: Maybe String -> SearchPath
-mkSearchPath Nothing = [(".",".hi")]
-mkSearchPath (Just s)
- = go s
+mkSearchPath Nothing = [(".",".hi")] -- ToDo: default should be to look in
+ -- the directory the module we're compiling
+ -- lives.
+mkSearchPath (Just s) = go s
where
go "" = []
go s =
projects / ghc-hetmet.git / blobdiff