\section[Rename]{Renaming and dependency analysis passes}
\begin{code}
-module Rename ( renameModule, closeIfaceDecls, checkOldIface ) where
+module Rename ( renameModule, renameStmt, closeIfaceDecls, checkOldIface ) where
#include "HsVersions.h"
import HsSyn
import RdrHsSyn ( RdrNameHsModule, RdrNameHsDecl, RdrNameDeprecation,
- RdrNameTyClDecl, RdrNameRuleDecl, RdrNameInstDecl, RdrNameImportDecl
+ RdrNameTyClDecl, RdrNameRuleDecl, RdrNameInstDecl, RdrNameImportDecl,
+ RdrNameStmt
)
import RnHsSyn ( RenamedHsDecl, RenamedTyClDecl, RenamedRuleDecl, RenamedInstDecl,
- extractHsTyNames,
+ extractHsTyNames, RenamedStmt,
instDeclFVs, tyClDeclFVs, ruleDeclFVs
)
import CmdLineOpts ( DynFlags, DynFlag(..) )
import RnMonad
-import RnNames ( getGlobalNames )
+import RnExpr ( rnStmt )
+import RnNames ( getGlobalNames, exportsFromAvail )
import RnSource ( rnSourceDecls, rnTyClDecl, rnIfaceRuleDecl, rnInstDecl )
-import RnIfaces ( slurpImpDecls, mkImportInfo,
- getInterfaceExports, closeDecls,
+import RnIfaces ( slurpImpDecls, mkImportInfo, recordLocalSlurps,
+ closeDecls,
RecompileRequired, outOfDate, recompileRequired
)
import RnHiFiles ( readIface, removeContext, loadInterface,
- loadExports, loadFixDecls, loadDeprecs )
-import RnEnv ( availsToNameSet, availName,
- emptyAvailEnv, unitAvailEnv, availEnvElts, plusAvailEnv, groupAvails,
- warnUnusedImports, warnUnusedLocalBinds, warnUnusedModules,
- lookupOrigNames, lookupSrcName, newGlobalName, unQualInScope
+ loadExports, loadFixDecls, loadDeprecs,
+ )
+import MkIface ( pprUsage )
+import RnEnv ( availsToNameSet, mkIfaceGlobalRdrEnv,
+ emptyAvailEnv, unitAvailEnv, availEnvElts,
+ plusAvailEnv, groupAvails, warnUnusedImports,
+ warnUnusedLocalBinds, warnUnusedModules,
+ lookupSrcName, addImplicitFVs,
+ newGlobalName, unQualInScope,, ubiquitousNames
)
import Module ( Module, ModuleName, WhereFrom(..),
moduleNameUserString, moduleName,
moduleEnvElts
)
-import Name ( Name, NamedThing(..), getSrcLoc,
- nameIsLocalOrFrom, nameOccName, nameModule,
- )
+import Name ( Name, nameIsLocalOrFrom, nameModule )
import Name ( mkNameEnv, nameEnvElts, extendNameEnv )
-import RdrName ( elemRdrEnv, foldRdrEnv, isQual )
-import OccName ( occNameFlavour )
+import RdrName ( foldRdrEnv, isQual )
import NameSet
-import TysWiredIn ( unitTyCon, intTyCon, boolTyCon )
-import PrelNames ( mAIN_Name, pREL_MAIN_Name, pRELUDE_Name,
- ioTyCon_RDR, main_RDR_Unqual,
- unpackCString_RDR, unpackCStringFoldr_RDR, unpackCStringUtf8_RDR,
- eqString_RDR
- )
-import PrelInfo ( derivingOccurrences )
-import Type ( funTyCon )
-import ErrUtils ( dumpIfSet, showPass, printErrorsAndWarnings, errorsFound )
+import PrelNames ( SyntaxMap, pRELUDE_Name )
+import ErrUtils ( dumpIfSet, dumpIfSet_dyn, showPass,
+ printErrorsAndWarnings, errorsFound )
import Bag ( bagToList )
import FiniteMap ( FiniteMap, fmToList, emptyFM, lookupFM,
addToFM_C, elemFM, addToFM
)
-import UniqFM ( lookupUFM )
import Maybes ( maybeToBool, catMaybes )
import Outputable
import IO ( openFile, IOMode(..) )
import HscTypes ( PersistentCompilerState, HomeIfaceTable, HomeSymbolTable,
ModIface(..), WhatsImported(..),
- VersionInfo(..), ImportVersion,
+ VersionInfo(..), ImportVersion, IsExported,
IfaceDecls, mkIfaceDecls, dcl_tycl, dcl_rules, dcl_insts,
- GlobalRdrEnv, pprGlobalRdrEnv,
+ GlobalRdrEnv, GlobalRdrElt(..), pprGlobalRdrEnv,
AvailEnv, GenAvailInfo(..), AvailInfo, Avails,
Provenance(..), ImportReason(..), initialVersionInfo,
- Deprecations(..), lookupDeprec, lookupIface
+ Deprecations(..),
+ LocalRdrEnv
)
+import CmStaticInfo ( GhciMode(..) )
import List ( partition, nub )
\end{code}
+
%*********************************************************
%* *
-\subsection{The main function: rename}
+\subsection{The two main wrappers}
%* *
%*********************************************************
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> Module -> RdrNameHsModule
- -> IO (PersistentCompilerState, Maybe (PrintUnqualified, ModIface, [RenamedHsDecl]))
+ -> IO (PersistentCompilerState, PrintUnqualified,
+ Maybe (IsExported, ModIface, (SyntaxMap, [RenamedHsDecl])))
-- Nothing => some error occurred in the renamer
-renameModule dflags hit hst old_pcs this_module rdr_module
- = do { showPass dflags "Renamer"
+renameModule dflags hit hst pcs this_module rdr_module
+ = renameSource dflags hit hst pcs this_module $
+ rename this_module rdr_module
+\end{code}
- -- Initialise the renamer monad
- ; (new_pcs, msgs, maybe_rn_stuff) <- initRn dflags hit hst old_pcs this_module
- (rename this_module rdr_module)
- ; let print_unqualified :: Name -> Bool -- Is this chap in scope unqualified?
- print_unqualified = case maybe_rn_stuff of
- Just (unqual, _, _) -> unqual
- Nothing -> alwaysQualify
+\begin{code}
+renameStmt :: DynFlags
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> Module -- current context (scope to compile in)
+ -> Module -- current module
+ -> LocalRdrEnv -- current context (temp bindings)
+ -> RdrNameStmt -- parsed stmt
+ -> IO ( PersistentCompilerState,
+ PrintUnqualified,
+ Maybe ([Name], (SyntaxMap, RenamedStmt, [RenamedHsDecl]))
+ )
+
+renameStmt dflags hit hst pcs scope_module this_module local_env stmt
+ = renameSource dflags hit hst pcs this_module $
+
+ -- 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
+
+ -- Rename it
+ initRnMS rdr_env local_env emptyLocalFixityEnv CmdLineMode (
+ rnStmt stmt $ \ stmt' ->
+ returnRn (([], stmt'), emptyFVs)
+ ) `thenRn` \ ((binders, stmt), fvs) ->
+
+ -- Bale out if we fail
+ checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ doDump [] 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)))
+
+ 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:"
+ (vcat [text "Binders:" <+> ppr bndrs,
+ ppr stmt, text "",
+ vcat (map ppr decls)]))
+\end{code}
+
+
+%*********************************************************
+%* *
+\subsection{The main function: rename}
+%* *
+%*********************************************************
+
+\begin{code}
+renameSource :: DynFlags
+ -> HomeIfaceTable -> HomeSymbolTable
+ -> PersistentCompilerState
+ -> Module
+ -> RnMG (PrintUnqualified, Maybe r)
+ -> IO (PersistentCompilerState, PrintUnqualified, Maybe r)
+ -- Nothing => some error occurred in the renamer
+
+renameSource dflags hit hst old_pcs this_module thing_inside
+ = do { showPass dflags "Renamer"
+
+ -- Initialise the renamer monad
+ ; (new_pcs, msgs, (print_unqual, maybe_rn_stuff))
+ <- initRn dflags hit hst old_pcs this_module thing_inside
-- Print errors from renaming
- ; printErrorsAndWarnings print_unqualified msgs ;
+ ; printErrorsAndWarnings print_unqual msgs ;
-- Return results. No harm in updating the PCS
; if errorsFound msgs then
- return (new_pcs, Nothing)
+ return (new_pcs, print_unqual, Nothing)
else
- return (new_pcs, maybe_rn_stuff)
+ return (new_pcs, print_unqual, maybe_rn_stuff)
}
\end{code}
\begin{code}
-rename :: Module -> RdrNameHsModule -> RnMG (Maybe (PrintUnqualified, ModIface, [RenamedHsDecl]))
-rename this_module contents@(HsModule _ _ _ imports local_decls mod_deprec loc)
+rename :: Module -> RdrNameHsModule
+ -> RnMG (PrintUnqualified, Maybe (IsExported, ModIface, (SyntaxMap, [RenamedHsDecl])))
+rename 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,
- export_avails, global_avail_env) ->
-
+ getGlobalNames this_module contents `thenRn` \ (gbl_env, local_gbl_env, all_avails@(_, global_avail_env)) ->
+ let
+ print_unqualified = unQualInScope gbl_env
+ in
-- Exit if we've found any errors
checkErrsRn `thenRn` \ no_errs_so_far ->
if not no_errs_so_far then
-- Found errors already, so exit now
rnDump [] [] `thenRn_`
- returnRn Nothing
+ returnRn (print_unqualified, Nothing)
else
+ -- PROCESS EXPORT LIST
+ exportsFromAvail mod_name exports all_avails gbl_env `thenRn` \ export_avails ->
+
traceRn (text "Local top-level environment" $$
nest 4 (pprGlobalRdrEnv local_gbl_env)) `thenRn_`
-- RENAME THE SOURCE
rnSourceDecls gbl_env local_fixity_env local_decls `thenRn` \ (rn_local_decls, source_fvs) ->
- -- CHECK THAT main IS DEFINED, IF REQUIRED
- checkMain this_module local_gbl_env `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
+ -- the slurped decls may get lost when we return up the stack
+ -- to hscMain/hscExpr.
+ checkErrsRn `thenRn` \ no_errs_so_far ->
+ if not no_errs_so_far then
+ -- Found errors already, so exit now
+ rnDump [] rn_local_decls `thenRn_`
+ returnRn (print_unqualified, Nothing)
+ else
-- SLURP IN ALL THE NEEDED DECLARATIONS
- implicitFVs mod_name rn_local_decls `thenRn` \ implicit_fvs ->
- let
- slurp_fvs = implicit_fvs `plusFV` source_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
+ 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 ->
- -- EXIT IF ERRORS FOUND
rnDump rn_imp_decls rn_local_decls `thenRn_`
- checkErrsRn `thenRn` \ no_errs_so_far ->
- if not no_errs_so_far then
- -- Found errors already, so exit now
- returnRn Nothing
- else
-- GENERATE THE VERSION/USAGE INFO
mkImportInfo mod_name imports `thenRn` \ my_usages ->
+ traceHiDiffsRn (vcat (map pprUsage my_usages)) `thenRn_`
-- BUILD THE MODULE INTERFACE
let
mod_iface = ModIface { mi_module = this_module,
mi_version = initialVersionInfo,
- mi_usages = my_usages,
+ mi_usages = my_usages,
mi_boot = False,
mi_orphan = is_orphan,
mi_exports = my_exports,
mi_decls = panic "mi_decls"
}
- print_unqualified = unQualInScope gbl_env
+ is_exported name = name `elemNameSet` exported_names
+ exported_names = availsToNameSet export_avails
in
-- REPORT UNUSED NAMES, AND DEBUG DUMP
imports global_avail_env
source_fvs export_avails rn_imp_decls `thenRn_`
- returnRn (Just (print_unqualified, mod_iface, final_decls))
+ returnRn (print_unqualified, Just (is_exported, mod_iface, (sugar_map, final_decls)))
where
mod_name = moduleName this_module
\end{code}
-Checking that main is defined
-
-\begin{code}
-checkMain :: Module -> GlobalRdrEnv -> RnMG ()
-checkMain this_mod local_env
- | moduleName this_mod == mAIN_Name
- = checkRn (main_RDR_Unqual `elemRdrEnv` local_env) noMainErr
- | otherwise
- = returnRn ()
-\end{code}
-
-@implicitFVs@ forces the renamer to slurp in some things which aren't
-mentioned explicitly, but which might be needed by the type checker.
-
-\begin{code}
-implicitFVs mod_name decls
- = lookupOrigNames implicit_occs `thenRn` \ implicit_names ->
- returnRn (mkNameSet (map getName default_tycons) `plusFV`
- implicit_names)
- where
- -- Add occurrences for Int, and (), because they
- -- are the types to which ambigious type variables may be defaulted by
- -- the type checker; so they won't always appear explicitly.
- -- [The () one is a GHC extension for defaulting CCall results.]
- -- ALSO: funTyCon, since it occurs implicitly everywhere!
- -- (we don't want to be bothered with making funTyCon a
- -- free var at every function application!)
- -- Double is dealt with separately in getGates
- default_tycons = [unitTyCon, funTyCon, boolTyCon, intTyCon]
-
- -- Add occurrences for IO or PrimIO
- implicit_main | mod_name == mAIN_Name
- || mod_name == pREL_MAIN_Name = [ioTyCon_RDR]
- | otherwise = []
-
- -- Now add extra "occurrences" for things that
- -- the deriving mechanism, or defaulting, will later need in order to
- -- generate code
- implicit_occs = string_occs ++ foldr ((++) . get) implicit_main decls
-
- -- Virtually every program has error messages in it somewhere
- string_occs = [unpackCString_RDR, unpackCStringFoldr_RDR,
- unpackCStringUtf8_RDR, eqString_RDR]
-
- get (TyClD (TyData _ _ _ _ _ _ (Just deriv_classes) _ _ _))
- = concat (map get_deriv deriv_classes)
- get other = []
-
- get_deriv cls = case lookupUFM derivingOccurrences cls of
- Nothing -> []
- Just occs -> occs
-\end{code}
-
\begin{code}
isOrphanDecl this_mod (InstD (InstDecl inst_ty _ _ _ _))
= not (foldNameSet ((||) . nameIsLocalOrFrom this_mod) False
check (HsLit _) = False
check (HsOverLit _) = False
check (OpApp l o _ r) = check l && check o && check r
- check (NegApp e _) = check e
+ 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
getFixities acc (FixD fix)
= fix_decl acc fix
- getFixities acc (TyClD (ClassDecl _ _ _ _ sigs _ _ _ ))
+ getFixities acc (TyClD (ClassDecl { tcdSigs = sigs}))
= foldlRn fix_decl acc [sig | FixSig sig <- sigs]
-- Get fixities from class decl sigs too.
getFixities acc other_decl
%************************************************************************
\begin{code}
-checkOldIface :: DynFlags
+checkOldIface :: GhciMode
+ -> DynFlags
-> HomeIfaceTable -> HomeSymbolTable
-> PersistentCompilerState
-> FilePath
-> IO (PersistentCompilerState, Bool, (RecompileRequired, Maybe ModIface))
-- True <=> errors happened
-checkOldIface dflags hit hst pcs iface_path source_unchanged maybe_iface
- = runRn dflags hit hst pcs (panic "Bogus module") $
+checkOldIface ghci_mode dflags hit hst pcs iface_path source_unchanged maybe_iface
+ = runRn dflags hit hst pcs (panic "Bogus module") $
+
+ -- CHECK WHETHER THE SOURCE HAS CHANGED
+ ( if not source_unchanged then
+ traceHiDiffsRn (nest 4 (text "Source file changed or recompilation check turned off"))
+ else returnRn () ) `thenRn_`
+
+ -- If the source has changed and we're in interactive mode, avoid reading
+ -- an interface; just return the one we might have been supplied with.
+ if ghci_mode == Interactive && not source_unchanged then
+ returnRn (outOfDate, maybe_iface)
+ else
+
case maybe_iface of
Just old_iface -> -- Use the one we already have
setModuleRn (mi_module old_iface) (check_versions old_iface)
-> 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_`
+ traceRn (text "Bad old interface file" $$ nest 4 err) `thenRn_`
returnRn (outOfDate, Nothing)
Right parsed_iface
where
check_versions :: ModIface -> RnMG (RecompileRequired, Maybe ModIface)
check_versions iface
+ | not source_unchanged
+ = returnRn (outOfDate, Just iface)
+ | otherwise
= -- Check versions
- recompileRequired iface_path source_unchanged iface
- `thenRn` \ recompile ->
+ recompileRequired iface_path iface `thenRn` \ recompile ->
returnRn (recompile, Just iface)
\end{code}
mi_boot = False, mi_orphan = pi_orphan iface,
mi_fixities = fix_env, mi_deprecs = deprec_env,
mi_decls = decls,
- mi_globals = panic "No mi_globals in old interface"
+ mi_globals = mkIfaceGlobalRdrEnv avails
}
in
returnRn mod_iface
needed = unionManyNameSets (map ruleDeclFVs rule_decls) `unionNameSets`
unionManyNameSets (map instDeclFVs inst_decls) `unionNameSets`
unionManyNameSets (map tyClDeclFVs tycl_decls)
+ local_names = foldl add emptyNameSet tycl_decls
+ add names decl = addListToNameSet names (map fst (tyClDeclSysNames decl ++ tyClDeclNames decl))
in
- closeDecls decls needed
+
+ recordLocalSlurps local_names `thenRn_`
+
+ -- Do the transitive closure
+ closeDecls decls (needed `plusFV` implicit_fvs) `thenRn` \closed_decls ->
+ rnDump [] closed_decls `thenRn_`
+ returnRn closed_decls
+ where
+ implicit_fvs = ubiquitousNames -- Data type decls with record selectors,
+ -- which may appear in the decls, need unpackCString
+ -- and friends. It's easier to just grab them right now.
\end{code}
%*********************************************************
= warnUnusedModules unused_imp_mods `thenRn_`
warnUnusedLocalBinds bad_locals `thenRn_`
warnUnusedImports bad_imp_names `thenRn_`
- printMinimalImports this_mod unqual minimal_imports `thenRn_`
- warnDeprecations this_mod export_avails my_deprecs
- really_used_names
-
+ printMinimalImports this_mod unqual minimal_imports
where
this_mod = mi_module my_mod_iface
gbl_env = mi_globals my_mod_iface
- my_deprecs = mi_deprecs my_mod_iface
-- The export_fvs make the exported names look just as if they
-- occurred in the source program.
-- Collect the defined names from the in-scope environment
-- Look for the qualified ones only, else get duplicates
- defined_names :: [(Name,Provenance)]
+ defined_names :: [GlobalRdrElt]
defined_names = foldRdrEnv add [] gbl_env
add rdr_name ns acc | isQual rdr_name = ns ++ acc
| otherwise = acc
- defined_and_used, defined_but_not_used :: [(Name,Provenance)]
+ defined_and_used, defined_but_not_used :: [GlobalRdrElt]
(defined_and_used, defined_but_not_used) = partition used defined_names
- used (name,_) = name `elemNameSet` really_used_names
+ used (GRE name _ _) = name `elemNameSet` really_used_names
-- Filter out the ones only defined implicitly
bad_locals :: [Name]
- bad_locals = [n | (n,LocalDef) <- defined_but_not_used]
+ bad_locals = [n | (GRE n LocalDef _) <- defined_but_not_used]
bad_imp_names :: [(Name,Provenance)]
- bad_imp_names = [(n,p) | (n,p@(NonLocalDef (UserImport mod _ True))) <- defined_but_not_used,
+ bad_imp_names = [(n,p) | GRE n p@(NonLocalDef (UserImport mod _ True)) _ <- defined_but_not_used,
not (module_unused mod)]
-- inst_mods are directly-imported modules that
minimal_imports1 = foldr add_name minimal_imports0 defined_and_used
minimal_imports = foldr add_inst_mod minimal_imports1 inst_mods
- add_name (n,NonLocalDef (UserImport m _ _)) acc = addToFM_C plusAvailEnv acc (moduleName (nameModule n))
- (unitAvailEnv (mk_avail n))
- add_name (n,other_prov) acc = acc
+ -- We've carefully preserved the provenance so that we can
+ -- construct minimal imports that import the name by (one of)
+ -- the same route(s) as the programmer originally did.
+ add_name (GRE n (NonLocalDef (UserImport m _ _)) _) acc = addToFM_C plusAvailEnv acc (moduleName m)
+ (unitAvailEnv (mk_avail n))
+ add_name (GRE n other_prov _) acc = acc
mk_avail n = case lookupNameEnv avail_env n of
Just (AvailTC m _) | n==m -> AvailTC n [n]
module_unused :: Module -> Bool
module_unused mod = moduleName mod `elem` unused_imp_mods
-warnDeprecations this_mod export_avails my_deprecs used_names
- = doptRn Opt_WarnDeprecations `thenRn` \ warn_drs ->
- if not warn_drs then returnRn () else
-
- -- The home modules for things in the export list
- -- may not have been loaded yet; do it now, so
- -- that we can see their deprecations, if any
- mapRn_ load_home export_mods `thenRn_`
-
- getIfacesRn `thenRn` \ ifaces ->
- getHomeIfaceTableRn `thenRn` \ hit ->
- let
- pit = iPIT ifaces
- deprecs = [ (n,txt)
- | n <- nameSetToList used_names,
- Just txt <- [lookup_deprec hit pit n] ]
- in
- mapRn_ warnDeprec deprecs
-
- where
- export_mods = nub [ moduleName (nameModule name)
- | avail <- export_avails,
- let name = availName avail,
- not (nameIsLocalOrFrom this_mod name) ]
-
- load_home m = loadInterface (text "Check deprecations for" <+> ppr m) m ImportBySystem
-
- lookup_deprec hit pit n
- | nameIsLocalOrFrom this_mod n
- = lookupDeprec my_deprecs n
- | otherwise
- = case lookupIface hit pit this_mod n of
- Just iface -> lookupDeprec (mi_deprecs iface) n
- Nothing -> pprPanic "warnDeprecations:" (ppr n)
-- ToDo: deal with original imports with 'qualified' and 'as M' clauses
+printMinimalImports :: Module -- This module
+ -> PrintUnqualified
+ -> 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
returnRn (mod, ies)
to_ie :: AvailInfo -> RnMG (IE Name)
+ -- The main trick here is that if we're importing all the constructors
+ -- we want to say "T(..)", but if we're importing only a subset we want
+ -- to say "T(A,B,C)". So we have to find out what the module exports.
to_ie (Avail n) = returnRn (IEVar n)
to_ie (AvailTC n [m]) = ASSERT( n==m )
returnRn (IEThingAbs n)
to_ie (AvailTC n ns)
- = getInterfaceExports n_mod ImportBySystem `thenRn` \ (_, avails_by_module) ->
- case [xs | (m,as) <- avails_by_module,
+ = 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,
x == n] of
%************************************************************************
\begin{code}
-warnDeprec :: (Name, DeprecTxt) -> RnM d ()
-warnDeprec (name, txt)
- = pushSrcLocRn (getSrcLoc name) $
- addWarnRn $
- sep [ text (occNameFlavour (nameOccName name)) <+> ppr name <+>
- text "is deprecated:", nest 4 (ppr txt) ]
-
-
dupFixityDecl rdr_name loc1 loc2
= vcat [ptext SLIT("Multiple fixity declarations for") <+> quotes (ppr rdr_name),
ptext SLIT("at ") <+> ppr loc1,
badDeprec d
= sep [ptext SLIT("Illegal deprecation when whole module is deprecated"),
nest 4 (ppr d)]
-
-noMainErr
- = hsep [ptext SLIT("Module"), quotes (ppr mAIN_Name),
- ptext SLIT("must include a definition for"), quotes (ptext SLIT("main"))]
\end{code}
projects / ghc-hetmet.git / blobdiff