\section[Rename]{Renaming and dependency analysis passes}
\begin{code}
-module Rename ( renameModule, renameStmt, closeIfaceDecls, checkOldIface ) where
+module Rename
+ ( renameModule
+ , RnResult(..)
+ , renameStmt
+ , renameRdrName
+ , renameExtCore
+ , mkGlobalContext
+ , closeIfaceDecls
+ , checkOldIface
+ , slurpIface
+ ) where
#include "HsVersions.h"
RdrNameStmt
)
import RnHsSyn ( RenamedHsDecl, RenamedTyClDecl, RenamedRuleDecl, RenamedInstDecl,
- extractHsTyNames, RenamedStmt,
+ RenamedStmt,
instDeclFVs, tyClDeclFVs, ruleDeclFVs
)
-import CmdLineOpts ( DynFlags, DynFlag(..) )
+import CmdLineOpts ( DynFlags, DynFlag(..), opt_InPackage )
import RnMonad
import RnExpr ( rnStmt )
import RnNames ( getGlobalNames, exportsFromAvail )
closeDecls,
RecompileRequired, outOfDate, recompileRequired
)
-import RnHiFiles ( readIface, removeContext, loadInterface,
+import RnHiFiles ( readIface, loadInterface,
loadExports, loadFixDecls, loadDeprecs,
)
-import MkIface ( pprUsage )
-import RnEnv ( availsToNameSet, mkIfaceGlobalRdrEnv,
- emptyAvailEnv, unitAvailEnv, availEnvElts,
+import RnEnv ( availsToNameSet,
+ unitAvailEnv, availEnvElts, availNames,
plusAvailEnv, groupAvails, warnUnusedImports,
warnUnusedLocalBinds, warnUnusedModules,
- lookupSrcName, addImplicitFVs,
- newGlobalName, unQualInScope,, ubiquitousNames
+ lookupSrcName, getImplicitStmtFVs,
+ getImplicitModuleFVs, newGlobalName, unQualInScope,
+ ubiquitousNames, lookupOccRn, checkMain,
+ plusGlobalRdrEnv, mkGlobalRdrEnv
)
import Module ( Module, ModuleName, WhereFrom(..),
moduleNameUserString, moduleName,
moduleEnvElts
)
-import Name ( Name, nameIsLocalOrFrom, nameModule )
-import Name ( mkNameEnv, nameEnvElts, extendNameEnv )
-import RdrName ( foldRdrEnv, isQual )
+import Name ( Name, nameModule, isExternalName )
+import NameEnv
import NameSet
-import PrelNames ( SyntaxMap, pRELUDE_Name )
+import RdrName ( foldRdrEnv, isQual, emptyRdrEnv )
+import PrelNames ( iNTERACTIVE, pRELUDE_Name )
import ErrUtils ( dumpIfSet, dumpIfSet_dyn, showPass,
printErrorsAndWarnings, errorsFound )
import Bag ( bagToList )
import Maybes ( maybeToBool, catMaybes )
import Outputable
import IO ( openFile, IOMode(..) )
-import HscTypes ( PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
- ModIface(..), WhatsImported(..),
- VersionInfo(..), ImportVersion, IsExported,
- IfaceDecls, mkIfaceDecls, dcl_tycl, dcl_rules, dcl_insts,
- GlobalRdrEnv, GlobalRdrElt(..), pprGlobalRdrEnv,
- AvailEnv, GenAvailInfo(..), AvailInfo, Avails,
- Provenance(..), ImportReason(..), initialVersionInfo,
- Deprecations(..),
- LocalRdrEnv
- )
-import CmStaticInfo ( GhciMode(..) )
+import HscTypes -- lots of it
import List ( partition, nub )
\end{code}
-
-
%*********************************************************
%* *
-\subsection{The two main wrappers}
+\subsection{The main wrappers}
%* *
%*********************************************************
\begin{code}
-renameModule :: DynFlags
+renameModule :: DynFlags -> GhciMode
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module -> RdrNameHsModule
-> IO (PersistentCompilerState, PrintUnqualified,
- Maybe (IsExported, ModIface, (SyntaxMap, [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 context (scope to compile in)
- -> Module -- current module
- -> LocalRdrEnv -- current context (temp bindings)
+ -> InteractiveContext
-> RdrNameStmt -- parsed stmt
-> IO ( PersistentCompilerState,
PrintUnqualified,
- Maybe ([Name], (SyntaxMap, RenamedStmt, [RenamedHsDecl]))
+ Maybe ([Name], (RenamedStmt, [RenamedHsDecl]))
)
-renameStmt dflags hit hst pcs scope_module this_module local_env stmt
- = renameSource dflags hit hst pcs this_module $
+renameStmt dflags hit hst pcs ic stmt
+ = renameSource dflags hit hst pcs iNTERACTIVE $
- -- 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
- loadInterface doc (moduleName scope_module) ImportByUser `thenRn` \ iface ->
- let rdr_env = mi_globals iface
- print_unqual = unQualInScope rdr_env
- in
- checkErrsRn `thenRn` \ no_errs_so_far ->
- if not no_errs_so_far then
- returnRn (print_unqual, Nothing)
- else
+ -- 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 it
- initRnMS rdr_env local_env emptyLocalFixityEnv CmdLineMode (
+ -- Rename the stmt
+ initRnMS rdr_env emptyAvailEnv local_rdr_env emptyLocalFixityEnv CmdLineMode (
rnStmt stmt $ \ stmt' ->
returnRn (([], stmt'), emptyFVs)
- ) `thenRn` \ ((binders, stmt), fvs) ->
+ ) `thenRn` \ ((binders, stmt), fvs) ->
-- Bale out if we fail
- checkErrsRn `thenRn` \ no_errs_so_far ->
+ checkErrsRn `thenRn` \ no_errs_so_far ->
if not no_errs_so_far then
- doDump [] stmt [] `thenRn_` returnRn (print_unqual, Nothing)
+ doDump dflags [] stmt [] `thenRn_` returnRn (print_unqual, Nothing)
else
- let filtered_fvs = fvs `delListFromNameSet` rdrEnvElts local_env in
-
-- Add implicit free vars, and close decls
- addImplicitFVs rdr_env Nothing filtered_fvs
- `thenRn` \ (slurp_fvs, syntax_map) ->
- slurpImpDecls slurp_fvs `thenRn` \ decls ->
-
- doDump binders stmt decls `thenRn_`
- returnRn (print_unqual, Just (binders, (syntax_map, stmt, decls)))
+ getImplicitStmtFVs `thenRn` \ implicit_fvs ->
+ slurpImpDecls (fvs `plusFV` implicit_fvs) `thenRn` \ decls ->
+ -- NB: an earlier version deleted (rdrEnvElts local_env) from
+ -- the fvs. But (a) that isn't necessary, because previously
+ -- bound things in the local_env will be in the TypeEnv, and
+ -- the renamer doesn't re-slurp such things, and
+ -- (b) it's WRONG to delete them. Consider in GHCi:
+ -- Mod> let x = e :: T
+ -- Mod> let y = x + 3
+ -- We need to pass 'x' among the fvs to slurpImpDecls, so that
+ -- the latter can see that T is a gate, and hence import the Num T
+ -- instance decl. (See the InTypEnv case in RnIfaces.slurpSourceRefs.)
+
+ doDump dflags binders stmt decls `thenRn_`
+ returnRn (print_unqual, Just (binders, (stmt, decls)))
where
- doc = text "context for compiling expression"
-
- doDump :: [Name] -> RenamedStmt -> [RenamedHsDecl] -> RnMG (Either IOError ())
- doDump bndrs stmt decls
- = getDOptsRn `thenRn` \ dflags ->
- ioToRnM (dumpIfSet_dyn dflags Opt_D_dump_rn "Renamer:"
+ doDump :: DynFlags -> [Name] -> RenamedStmt -> [RenamedHsDecl]
+ -> RnMG (Either IOError ())
+ doDump dflags bndrs stmt decls
+ = ioToRnM (dumpIfSet_dyn dflags Opt_D_dump_rn "Renamer:"
(vcat [text "Binders:" <+> ppr bndrs,
ppr stmt, text "",
vcat (map ppr decls)]))
+
+
+renameRdrName
+ :: DynFlags
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> InteractiveContext
+ -> [RdrName] -- name to rename
+ -> IO ( PersistentCompilerState,
+ PrintUnqualified,
+ Maybe ([Name], [RenamedHsDecl])
+ )
+
+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 local_rdr_env emptyLocalFixityEnv CmdLineMode
+ (mapRn (tryRn.lookupOccRn) rdr_names) `thenRn` \ maybe_names ->
+ let
+ ok_names = [ a | Right a <- maybe_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 ->
+
+ 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}
+
+\begin{code}
+renameExtCore :: DynFlags
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> Module
+ -> RdrNameHsModule
+ -> IO (PersistentCompilerState, PrintUnqualified,
+ Maybe (IsExported, ModIface, [RenamedHsDecl]))
+
+ -- Nothing => some error occurred in the renamer
+renameExtCore dflags hit hst pcs this_module
+ rdr_module@(HsModule _ _ _ _ local_decls _ loc)
+ -- Rename the (Core) module
+ = renameSource dflags hit hst pcs this_module $
+ pushSrcLocRn loc $
+
+ -- Rename the source
+ initIfaceRnMS this_module (rnExtCoreDecls local_decls) `thenRn` \ (rn_local_decls, binders, fvs) ->
+ recordLocalSlurps binders `thenRn_`
+ closeDecls rn_local_decls fvs `thenRn` \ final_decls ->
+
+ -- Bail out if we fail
+ checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ returnRn (print_unqualified, Nothing)
+ else
+ rnDump final_decls [] `thenRn_`
+ let
+ mod_iface = ModIface { mi_module = this_module,
+ mi_package = opt_InPackage,
+ mi_version = initialVersionInfo,
+ mi_usages = [],
+ mi_boot = False,
+ mi_orphan = panic "is_orphan",
+ -- ToDo: export the data types also.
+ mi_exports = [(moduleName this_module,
+ map Avail (nameSetToList binders))],
+ mi_globals = Nothing,
+ mi_fixities = mkNameEnv [],
+ mi_deprecs = NoDeprecs,
+ mi_decls = panic "mi_decls"
+ }
+
+ is_exported _ = True
+ in
+ returnRn (print_unqualified, Just (is_exported, mod_iface, final_decls))
+
+ where
+ print_unqualified = const False -- print everything qualified.
+
+
+rnExtCoreDecls :: [RdrNameHsDecl]
+ -> RnMS ([RenamedHsDecl],
+ NameSet, -- Binders
+ FreeVars) -- Free variables
+
+rnExtCoreDecls decls
+ -- Renaming external-core decls is rather like renaming an interface file
+ -- All the decls are TyClDecls, and all the names are original names
+ = go [] emptyNameSet emptyNameSet decls
+ where
+ go rn_decls bndrs fvs [] = returnRn (rn_decls, bndrs, fvs)
+
+ go rn_decls bndrs fvs (TyClD decl : decls)
+ = rnTyClDecl decl `thenRn` \ rn_decl ->
+ go (TyClD rn_decl : rn_decls)
+ (addListToNameSet bndrs (map fst (tyClDeclSysNames rn_decl ++ tyClDeclNames rn_decl)))
+ (fvs `plusFV` tyClDeclFVs rn_decl)
+ decls
+
+ go rn_decls bndrs fvs (decl : decls)
+ = addErrRn (text "Unexpected decl in ExtCore file" $$ ppr decl) `thenRn_`
+ go rn_decls bndrs fvs decls
+\end{code}
+
+
+%*********************************************************
+%* *
+\subsection{Make up an interactive context}
+%* *
+%*********************************************************
+
+\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
+ 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, (SyntaxMap, [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_`
fixitiesFromLocalDecls local_gbl_env local_decls `thenRn` \ local_fixity_env ->
-- RENAME THE SOURCE
- rnSourceDecls gbl_env local_fixity_env local_decls `thenRn` \ (rn_local_decls, source_fvs) ->
+ rnSourceDecls gbl_env global_avail_env
+ local_fixity_env SourceMode 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*
else
-- SLURP IN ALL THE NEEDED DECLARATIONS
- addImplicitFVs gbl_env (Just (mod_name, rn_local_decls))
- source_fvs `thenRn` \ (slurp_fvs, sugar_map) ->
- traceRn (text "Source FVs:" <+> fsep (map ppr (nameSetToList slurp_fvs))) `thenRn_`
- slurpImpDecls slurp_fvs `thenRn` \ rn_imp_decls ->
-
+ slurpImpDecls needed_fvs `thenRn` \ rn_imp_decls ->
rnDump rn_imp_decls rn_local_decls `thenRn_`
-- GENERATE THE VERSION/USAGE INFO
- mkImportInfo mod_name imports `thenRn` \ my_usages ->
- traceHiDiffsRn (vcat (map pprUsage my_usages)) `thenRn_`
+ mkImportInfo mod_name imports `thenRn` \ my_usages ->
-- BUILD THE MODULE INTERFACE
let
my_exports = groupAvails this_module export_avails
final_decls = rn_local_decls ++ rn_imp_decls
- is_orphan = any (isOrphanDecl this_module) rn_local_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` export_fvs)
mod_iface = ModIface { mi_module = this_module,
+ mi_package = opt_InPackage,
mi_version = initialVersionInfo,
mi_usages = my_usages,
mi_boot = False,
- mi_orphan = is_orphan,
+ 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_fvs export_avails rn_imp_decls `thenRn_`
+ 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, (sugar_map, final_decls)))
+ returnRn (print_unqualified, Just (dont_discard, mod_iface, rn_result))
where
mod_name = moduleName this_module
\end{code}
-\begin{code}
-isOrphanDecl this_mod (InstD (InstDecl inst_ty _ _ _ _))
- = not (foldNameSet ((||) . nameIsLocalOrFrom this_mod) False
- (extractHsTyNames (removeContext inst_ty)))
- -- The 'removeContext' is because of
- -- instance Foo a => Baz T where ...
- -- The decl is an orphan if Baz and T are both not locally defined,
- -- even if Foo *is* locally defined
-
-isOrphanDecl this_mod (RuleD (HsRule _ _ _ lhs _ _))
- = check lhs
- where
- -- At the moment we just check for common LHS forms
- -- Expand as necessary. Getting it wrong just means
- -- more orphans than necessary
- check (HsVar v) = not (nameIsLocalOrFrom this_mod v)
- check (HsApp f a) = check f && check a
- check (HsLit _) = False
- check (HsOverLit _) = False
- check (OpApp l o _ r) = check l && check o && check r
- check (NegApp e) = check e
- check (HsPar e) = check e
- check (SectionL e o) = check e && check o
- check (SectionR o e) = check e && check o
-
- check other = True -- Safe fall through
-
-isOrphanDecl _ _ = False
-\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 ->
case read_result of
Left err -> -- Old interface file not found, or garbled; give up
- traceRn (text "Bad old interface file" $$ nest 4 err) `thenRn_`
+ traceHiDiffsRn (
+ text "Cannot read old interface file:"
+ $$ 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
- -> Avails -- Exported by this module
-> [RenamedHsDecl]
-> RnMG ()
-reportUnusedNames my_mod_iface unqual imports avail_env
- source_fvs export_avails imported_decls
+reportUnusedNames my_mod_iface unqual imports avail_env gbl_env
+ used_names imported_decls
= warnUnusedModules unused_imp_mods `thenRn_`
warnUnusedLocalBinds bad_locals `thenRn_`
warnUnusedImports bad_imp_names `thenRn_`
printMinimalImports this_mod unqual minimal_imports
where
this_mod = mi_module my_mod_iface
- gbl_env = mi_globals my_mod_iface
- -- The export_fvs make the exported names look just as if they
- -- occurred in the source program.
- export_fvs = availsToNameSet export_avails
- used_names = source_fvs `plusFV` export_fvs
-
-- Now, a use of C implies a use of T,
-- if C was brought into scope by T(..) or T(C)
really_used_names = used_names `unionNameSets`
-> FiniteMap ModuleName AvailEnv -- Minimal imports
-> RnMG ()
printMinimalImports this_mod unqual imps
- = doptRn Opt_D_dump_minimal_imports `thenRn` \ dump_minimal ->
- if not dump_minimal then returnRn () else
+ = ifOptRn Opt_D_dump_minimal_imports $
mapRn to_ies (fmToList imps) `thenRn` \ mod_ies ->
ioToRnM (do { h <- openFile filename WriteMode ;
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,