\begin{code}
module Rename (
- renameModule, renameStmt, renameRdrName,
- closeIfaceDecls, checkOldIface
+ renameModule, RnResult(..), renameStmt, renameRdrName, mkGlobalContext,
+ closeIfaceDecls, checkOldIface, slurpIface
) where
#include "HsVersions.h"
instDeclFVs, tyClDeclFVs, ruleDeclFVs
)
-import CmdLineOpts ( DynFlags, DynFlag(..) )
+import CmdLineOpts ( DynFlags, DynFlag(..), opt_InPackage )
import RnMonad
import RnExpr ( rnStmt )
import RnNames ( getGlobalNames, exportsFromAvail )
import RnHiFiles ( readIface, loadInterface,
loadExports, loadFixDecls, loadDeprecs,
)
-import RnEnv ( availsToNameSet, mkIfaceGlobalRdrEnv,
- unitAvailEnv, availEnvElts,
+import RnEnv ( availsToNameSet,
+ unitAvailEnv, availEnvElts, availNames,
plusAvailEnv, groupAvails, warnUnusedImports,
warnUnusedLocalBinds, warnUnusedModules,
lookupSrcName, getImplicitStmtFVs,
getImplicitModuleFVs, newGlobalName, unQualInScope,
- ubiquitousNames, lookupOccRn
+ ubiquitousNames, lookupOccRn, checkMain,
+ plusGlobalRdrEnv, mkGlobalRdrEnv
)
import Module ( Module, ModuleName, WhereFrom(..),
moduleNameUserString, moduleName,
moduleEnvElts
)
-import Name ( Name, nameModule )
+import Name ( Name, nameModule, isExternalName )
import NameEnv
import NameSet
import RdrName ( foldRdrEnv, isQual )
-import PrelNames ( pRELUDE_Name )
+import PrelNames ( iNTERACTIVE, pRELUDE_Name )
import ErrUtils ( dumpIfSet, dumpIfSet_dyn, showPass,
printErrorsAndWarnings, errorsFound )
import Bag ( bagToList )
\end{code}
-
-
%*********************************************************
%* *
\subsection{The main wrappers}
%*********************************************************
\begin{code}
-renameModule :: DynFlags
+renameModule :: DynFlags -> GhciMode
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module -> RdrNameHsModule
-> IO (PersistentCompilerState, PrintUnqualified,
- Maybe (IsExported, ModIface, [RenamedHsDecl]))
+ Maybe (IsExported, ModIface, RnResult))
-- Nothing => some error occurred in the renamer
-renameModule dflags hit hst pcs this_module rdr_module
+renameModule dflags ghci_mode hit hst pcs this_module rdr_module
= renameSource dflags hit hst pcs this_module $
- rename this_module rdr_module
+ rename ghci_mode this_module rdr_module
\end{code}
\begin{code}
renameStmt :: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
- -> Module -- current module
-> InteractiveContext
-> RdrNameStmt -- parsed stmt
-> IO ( PersistentCompilerState,
Maybe ([Name], (RenamedStmt, [RenamedHsDecl]))
)
-renameStmt dflags hit hst pcs this_module ic stmt
- = renameSource dflags hit hst pcs this_module $
- extendTypeEnvRn (ic_type_env ic) $
+renameStmt dflags hit hst pcs ic stmt
+ = renameSource dflags hit hst pcs iNTERACTIVE $
-- load the context module
- loadContextModule (ic_module ic) $ \ (rdr_env, print_unqual) ->
+ let InteractiveContext{ ic_rn_gbl_env = rdr_env,
+ ic_print_unqual = print_unqual,
+ ic_rn_local_env = local_rdr_env,
+ ic_type_env = type_env } = ic
+ in
+
+ extendTypeEnvRn type_env $
-- Rename the stmt
- initRnMS rdr_env emptyAvailEnv (ic_rn_env ic) emptyLocalFixityEnv CmdLineMode (
+ initRnMS rdr_env emptyAvailEnv local_rdr_env emptyLocalFixityEnv CmdLineMode (
rnStmt stmt $ \ stmt' ->
returnRn (([], stmt'), emptyFVs)
) `thenRn` \ ((binders, stmt), fvs) ->
:: DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
- -> Module -- current module
-> InteractiveContext
-> [RdrName] -- name to rename
-> IO ( PersistentCompilerState,
Maybe ([Name], [RenamedHsDecl])
)
-renameRdrName dflags hit hst pcs this_module ic rdr_names =
- renameSource dflags hit hst pcs this_module $
- extendTypeEnvRn (ic_type_env ic) $
- loadContextModule (ic_module ic) $ \ (rdr_env, print_unqual) ->
+renameRdrName dflags hit hst pcs ic rdr_names =
+ renameSource dflags hit hst pcs iNTERACTIVE $
+
+ -- load the context module
+ let InteractiveContext{ ic_rn_gbl_env = rdr_env,
+ ic_print_unqual = print_unqual,
+ ic_rn_local_env = local_rdr_env,
+ ic_type_env = type_env } = ic
+ in
+
+ extendTypeEnvRn type_env $
- -- rename the rdr_name
- initRnMS rdr_env emptyAvailEnv (ic_rn_env ic) emptyLocalFixityEnv CmdLineMode
+ -- rename the rdr_name
+ initRnMS rdr_env emptyAvailEnv local_rdr_env emptyLocalFixityEnv CmdLineMode
(mapRn (tryRn.lookupOccRn) rdr_names) `thenRn` \ maybe_names ->
- let
+ let
ok_names = [ a | Right a <- maybe_names ]
- in
- if null ok_names
+ in
+ if null ok_names
then let errs = head [ e | Left e <- maybe_names ]
in setErrsRn errs `thenRn_`
doDump dflags ok_names [] `thenRn_`
returnRn (print_unqual, Nothing)
else
- slurpImpDecls (mkNameSet ok_names) `thenRn` \ decls ->
+ slurpImpDecls (mkNameSet ok_names) `thenRn` \ decls ->
- doDump dflags ok_names decls `thenRn_`
- returnRn (print_unqual, Just (ok_names, decls))
+ doDump dflags ok_names decls `thenRn_`
+ returnRn (print_unqual, Just (ok_names, decls))
where
doDump :: DynFlags -> [Name] -> [RenamedHsDecl] -> RnMG (Either IOError ())
doDump dflags names decls
= ioToRnM (dumpIfSet_dyn dflags Opt_D_dump_rn "Renamer:"
(vcat [ppr names, text "",
vcat (map ppr decls)]))
+\end{code}
+%*********************************************************
+%* *
+\subsection{Make up an interactive context}
+%* *
+%*********************************************************
--- Load the interface for the context module, so
--- that we can get its top-level lexical environment
--- Bale out if we fail to do this
-loadContextModule scope_module thing_inside
- = let doc = text "context for compiling expression"
- in
- loadInterface doc (moduleName scope_module) ImportByUser `thenRn` \ iface ->
- let rdr_env = mi_globals iface
- print_unqual = unQualInScope rdr_env
+\begin{code}
+mkGlobalContext
+ :: DynFlags -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> [Module] -> [Module]
+ -> IO (PersistentCompilerState, PrintUnqualified, Maybe GlobalRdrEnv)
+mkGlobalContext dflags hit hst pcs toplevs exports
+ = renameSource dflags hit hst pcs iNTERACTIVE $
+
+ mapRn getTopLevScope toplevs `thenRn` \ toplev_envs ->
+ mapRn getModuleExports exports `thenRn` \ export_envs ->
+ let full_env = foldr plusGlobalRdrEnv emptyRdrEnv
+ (toplev_envs ++ export_envs)
+ print_unqual = unQualInScope full_env
in
checkErrsRn `thenRn` \ no_errs_so_far ->
if not no_errs_so_far then
returnRn (print_unqual, Nothing)
else
- thing_inside (rdr_env, print_unqual)
+ returnRn (print_unqual, Just full_env)
+
+contextDoc = text "context for compiling statements"
+
+getTopLevScope :: Module -> RnM d GlobalRdrEnv
+getTopLevScope mod =
+ loadInterface contextDoc (moduleName mod) ImportByUser `thenRn` \ iface ->
+ case mi_globals iface of
+ Nothing -> panic "getTopLevScope"
+ Just env -> returnRn env
+
+getModuleExports :: Module -> RnM d GlobalRdrEnv
+getModuleExports mod =
+ loadInterface contextDoc (moduleName mod) ImportByUser `thenRn` \ iface ->
+ returnRn (foldl add emptyRdrEnv (mi_exports iface))
+ where
+ prov_fn n = NonLocalDef ImplicitImport
+ add env (mod,avails) =
+ plusGlobalRdrEnv env (mkGlobalRdrEnv mod True prov_fn avails NoDeprecs)
+\end{code}
+
+%*********************************************************
+%* *
+\subsection{Slurp in a whole module eagerly}
+%* *
+%*********************************************************
+
+\begin{code}
+slurpIface
+ :: DynFlags -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState -> Module
+ -> IO (PersistentCompilerState, PrintUnqualified,
+ Maybe ([Name], [RenamedHsDecl]))
+slurpIface dflags hit hst pcs mod =
+ renameSource dflags hit hst pcs iNTERACTIVE $
+
+ let mod_name = moduleName mod
+ in
+ loadInterface contextDoc mod_name ImportByUser `thenRn` \ iface ->
+ let fvs = availsToNameSet [ avail | (mn,avails) <- mi_exports iface,
+ avail <- avails ]
+ in
+ slurpImpDecls fvs `thenRn` \ rn_imp_decls ->
+ returnRn (alwaysQualify, Just (nameSetToList fvs, rn_imp_decls))
\end{code}
%*********************************************************
\end{code}
\begin{code}
-rename :: Module -> RdrNameHsModule
- -> RnMG (PrintUnqualified, Maybe (IsExported, ModIface, [RenamedHsDecl]))
-rename this_module contents@(HsModule _ _ exports imports local_decls mod_deprec loc)
+data RnResult -- A RenamedModule ia passed from renamer to typechecker
+ = RnResult { rr_mod :: Module, -- Same as in the ModIface,
+ rr_fixities :: FixityEnv, -- but convenient to have it here
+
+ rr_main :: Maybe Name, -- Just main, for module Main,
+ -- Nothing for other modules
+
+ rr_decls :: [RenamedHsDecl]
+ -- The other declarations of the module
+ -- Fixity and deprecations have already been slurped out
+ } -- and are now in the ModIface for the module
+
+rename :: GhciMode -> Module -> RdrNameHsModule
+ -> RnMG (PrintUnqualified, Maybe (IsExported, ModIface, RnResult))
+rename ghci_mode this_module
+ contents@(HsModule _ _ exports imports local_decls mod_deprec loc)
= pushSrcLocRn loc $
-- FIND THE GLOBAL NAME ENVIRONMENT
- getGlobalNames this_module contents `thenRn` \ (gbl_env, local_gbl_env, all_avails@(_, global_avail_env)) ->
+ getGlobalNames this_module contents `thenRn` \ (gbl_env, local_gbl_env,
+ (mod_avail_env, global_avail_env)) ->
let
print_unqualified = unQualInScope gbl_env
+
+ full_avail_env :: NameEnv AvailInfo
+ -- The domain of global_avail_env is just the 'major' things;
+ -- variables, type constructors, classes.
+ -- E.g. Functor |-> Functor( Functor, fmap )
+ -- The domain of full_avail_env is everything in scope
+ -- E.g. Functor |-> Functor( Functor, fmap )
+ -- fmap |-> Functor( Functor, fmap )
+ --
+ -- This filled-out avail_env is needed to generate
+ -- exports (mkExportAvails), and for generating minimal
+ -- exports (reportUnusedNames)
+ full_avail_env = mkNameEnv [ (name,avail)
+ | avail <- availEnvElts global_avail_env,
+ name <- availNames avail]
in
-- Exit if we've found any errors
checkErrsRn `thenRn` \ no_errs_so_far ->
else
-- PROCESS EXPORT LIST
- exportsFromAvail mod_name exports all_avails gbl_env `thenRn` \ export_avails ->
+ exportsFromAvail mod_name exports mod_avail_env
+ full_avail_env gbl_env `thenRn` \ export_avails ->
traceRn (text "Local top-level environment" $$
nest 4 (pprGlobalRdrEnv local_gbl_env)) `thenRn_`
rnSourceDecls gbl_env global_avail_env
local_fixity_env local_decls `thenRn` \ (rn_local_decls, source_fvs) ->
+ -- GET ANY IMPLICIT FREE VARIALBES
+ getImplicitModuleFVs rn_local_decls `thenRn` \ implicit_fvs ->
+ checkMain ghci_mode mod_name gbl_env `thenRn` \ (maybe_main_name, main_fvs, implicit_main_fvs) ->
+ let
+ export_fvs = availsToNameSet export_avails
+ used_fvs = source_fvs `plusFV` export_fvs `plusFV` main_fvs
+ -- The export_fvs make the exported names look just as if they
+ -- occurred in the source program. For the reasoning, see the
+ -- comments with RnIfaces.mkImportInfo
+ -- It also helps reportUnusedNames, which of course must not complain
+ -- that 'f' isn't mentioned if it is mentioned in the export list
+
+ needed_fvs = implicit_fvs `plusFV` implicit_main_fvs `plusFV` used_fvs
+ -- It's important to do the "plus" this way round, so that
+ -- when compiling the prelude, locally-defined (), Bool, etc
+ -- override the implicit ones.
+
+ in
+ traceRn (text "Needed FVs:" <+> fsep (map ppr (nameSetToList needed_fvs))) `thenRn_`
+
-- EXIT IF ERRORS FOUND
-- We exit here if there are any errors in the source, *before*
-- we attempt to slurp the decls from the interfaces, otherwise
else
-- SLURP IN ALL THE NEEDED DECLARATIONS
- -- Find out what re-bindable names to use for desugaring
- getImplicitModuleFVs mod_name rn_local_decls `thenRn` \ implicit_fvs ->
- let
- export_fvs = availsToNameSet export_avails
- source_fvs2 = source_fvs `plusFV` export_fvs
- -- The export_fvs make the exported names look just as if they
- -- occurred in the source program. For the reasoning, see the
- -- comments with RnIfaces.mkImportInfo
- -- It also helps reportUnusedNames, which of course must not complain
- -- that 'f' isn't mentioned if it is mentioned in the export list
-
- source_fvs3 = implicit_fvs `plusFV` source_fvs2
- -- It's important to do the "plus" this way round, so that
- -- when compiling the prelude, locally-defined (), Bool, etc
- -- override the implicit ones.
-
- in
- traceRn (text "Source FVs:" <+> fsep (map ppr (nameSetToList source_fvs3))) `thenRn_`
- slurpImpDecls source_fvs3 `thenRn` \ rn_imp_decls ->
+ slurpImpDecls needed_fvs `thenRn` \ rn_imp_decls ->
rnDump rn_imp_decls rn_local_decls `thenRn_`
-- GENERATE THE VERSION/USAGE INFO
final_decls = rn_local_decls ++ rn_imp_decls
+ -- In interactive mode, we don't want to discard any top-level
+ -- entities at all (eg. do not inline them away during
+ -- simplification), and retain them all in the TypeEnv so they are
+ -- available from the command line.
+ --
+ -- isExternalName separates the user-defined top-level names from those
+ -- introduced by the type checker.
+ dont_discard :: Name -> Bool
+ dont_discard | ghci_mode == Interactive = isExternalName
+ | otherwise = (`elemNameSet` exported_names)
+
+ exported_names = availsToNameSet export_avails
+
mod_iface = ModIface { mi_module = this_module,
+ mi_package = opt_InPackage,
mi_version = initialVersionInfo,
mi_usages = my_usages,
mi_boot = False,
mi_orphan = panic "is_orphan",
mi_exports = my_exports,
- mi_globals = gbl_env,
+ mi_globals = Just gbl_env,
mi_fixities = fixities,
mi_deprecs = my_deprecs,
mi_decls = panic "mi_decls"
}
- is_exported name = name `elemNameSet` exported_names
- exported_names = availsToNameSet export_avails
+ rn_result = RnResult { rr_mod = this_module,
+ rr_fixities = fixities,
+ rr_decls = final_decls,
+ rr_main = maybe_main_name }
in
-- REPORT UNUSED NAMES, AND DEBUG DUMP
reportUnusedNames mod_iface print_unqualified
- imports global_avail_env
- source_fvs2 rn_imp_decls `thenRn_`
- -- NB: source_fvs2: include exports (else we get bogus
+ imports full_avail_env gbl_env
+ used_fvs rn_imp_decls `thenRn_`
+ -- NB: used_fvs: include exports (else we get bogus
-- warnings of unused things) but not implicit FVs.
- returnRn (print_unqualified, Just (is_exported, mod_iface, final_decls))
+ returnRn (print_unqualified, Just (dont_discard, mod_iface, rn_result))
where
mod_name = moduleName this_module
\end{code}
-> DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
+ -> Module
-> FilePath
-> Bool -- Source unchanged
-> Maybe ModIface -- Old interface from compilation manager, if any
-> IO (PersistentCompilerState, Bool, (RecompileRequired, Maybe ModIface))
-- True <=> errors happened
-checkOldIface ghci_mode dflags hit hst pcs iface_path source_unchanged maybe_iface
+checkOldIface ghci_mode dflags hit hst pcs mod iface_path source_unchanged maybe_iface
= runRn dflags hit hst pcs (panic "Bogus module") $
-- CHECK WHETHER THE SOURCE HAS CHANGED
returnRn (outOfDate, maybe_iface)
else
+ setModuleRn mod $
case maybe_iface of
Just old_iface -> -- Use the one we already have
- setModuleRn (mi_module old_iface) (check_versions old_iface)
+ check_versions old_iface
Nothing -- try and read it from a file
-> readIface iface_path `thenRn` \ read_result ->
$$ nest 4 err) `thenRn_`
returnRn (outOfDate, Nothing)
- Right parsed_iface
- -> setModuleRn (pi_mod parsed_iface) $
- loadOldIface parsed_iface `thenRn` \ m_iface ->
+ Right parsed_iface ->
+ let read_mod_name = pi_mod parsed_iface
+ wanted_mod_name = moduleName mod
+ in
+ if (wanted_mod_name /= read_mod_name) then
+ traceHiDiffsRn (
+ text "Existing interface file has wrong module name: "
+ <> quotes (ppr read_mod_name)
+ ) `thenRn_`
+ returnRn (outOfDate, Nothing)
+ else
+ loadOldIface mod parsed_iface `thenRn` \ m_iface ->
check_versions m_iface
where
check_versions :: ModIface -> RnMG (RecompileRequired, Maybe ModIface)
but what?
\begin{code}
-loadOldIface :: ParsedIface -> RnMG ModIface
+loadOldIface :: Module -> ParsedIface -> RnMG ModIface
-loadOldIface parsed_iface
+loadOldIface mod parsed_iface
= let iface = parsed_iface
- mod = pi_mod iface
in
initIfaceRnMS mod (
loadHomeDecls (pi_decls iface) `thenRn` \ decls ->
decls = mkIfaceDecls new_decls new_rules new_insts
- mod_iface = ModIface { mi_module = mod, mi_version = version,
+ mod_iface = ModIface { mi_module = mod, mi_package = pi_pkg parsed_iface,
+ mi_version = version,
mi_exports = avails, mi_usages = usages,
mi_boot = False, mi_orphan = pi_orphan iface,
mi_fixities = fix_env, mi_deprecs = deprec_env,
mi_decls = decls,
- mi_globals = mkIfaceGlobalRdrEnv avails
+ mi_globals = Nothing
}
in
returnRn mod_iface
reportUnusedNames :: ModIface -> PrintUnqualified
-> [RdrNameImportDecl]
-> AvailEnv
+ -> GlobalRdrEnv
-> NameSet -- Used in this module
-> [RenamedHsDecl]
-> RnMG ()
-reportUnusedNames my_mod_iface unqual imports avail_env
+reportUnusedNames my_mod_iface unqual imports avail_env gbl_env
used_names imported_decls
= warnUnusedModules unused_imp_mods `thenRn_`
warnUnusedLocalBinds bad_locals `thenRn_`
printMinimalImports this_mod unqual minimal_imports
where
this_mod = mi_module my_mod_iface
- gbl_env = mi_globals my_mod_iface
-- Now, a use of C implies a use of T,
-- if C was brought into scope by T(..) or T(C)
to_ie (AvailTC n [m]) = ASSERT( n==m )
returnRn (IEThingAbs n)
to_ie (AvailTC n ns)
- = loadInterface (text "Compute minimal imports from" <+> ppr n_mod) n_mod ImportBySystem `thenRn` \ iface ->
+ = loadInterface (text "Compute minimal imports from" <+> ppr n_mod)
+ n_mod ImportBySystem `thenRn` \ iface ->
case [xs | (m,as) <- mi_exports iface,
m == n_mod,
AvailTC x xs <- as,
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