\section[MkIface]{Print an interface for a module}
\begin{code}
-module MkIface ( completeIface ) where
+module MkIface (
+ mkModDetails, mkModDetailsFromIface, completeIface, writeIface
+ ) where
#include "HsVersions.h"
import HsSyn
-import HsCore ( HsIdInfo(..), toUfExpr, ifaceSigName )
+import HsCore ( HsIdInfo(..), UfExpr(..), toUfExpr, toUfBndr )
import HsTypes ( toHsTyVars )
import BasicTypes ( Fixity(..), NewOrData(..),
- Version, bumpVersion, isLoopBreaker
+ Version, initialVersion, bumpVersion, isLoopBreaker
)
import RnMonad
-import RnHsSyn ( RenamedInstDecl, RenamedTyClDecl, RenamedRuleDecl, RenamedIfaceSig )
+import RnHsSyn ( RenamedInstDecl, RenamedTyClDecl )
+import TcHsSyn ( TypecheckedRuleDecl )
import HscTypes ( VersionInfo(..), IfaceDecls(..), ModIface(..), ModDetails(..),
- TyThing(..), DFunId )
+ TyThing(..), DFunId, TypeEnv, isTyClThing, Avails,
+ WhatsImported(..), GenAvailInfo(..),
+ ImportVersion, AvailInfo, Deprecations(..),
+ Finder, ModuleLocation(..)
+ )
import CmdLineOpts
import Id ( Id, idType, idInfo, omitIfaceSigForId, isUserExportedId, hasNoBinding,
- idSpecialisation
+ idSpecialisation, idName, setIdInfo
)
import Var ( isId )
import VarSet
import DataCon ( StrictnessMark(..), dataConSig, dataConFieldLabels, dataConStrictMarks )
-import IdInfo ( IdInfo, StrictnessInfo(..), ArityInfo(..),
- CprInfo(..), CafInfo(..),
- inlinePragInfo, arityInfo, arityLowerBound,
- strictnessInfo, isBottomingStrictness,
- cafInfo, specInfo, cprInfo,
- occInfo, isNeverInlinePrag,
- workerInfo, WorkerInfo(..)
+import IdInfo -- Lots
+import CoreSyn ( CoreExpr, CoreBind, Bind(..), CoreRule(..), IdCoreRule,
+ isBuiltinRule, rulesRules, rulesRhsFreeVars, emptyCoreRules,
+ bindersOfBinds
)
-import CoreSyn ( CoreExpr, CoreBind, Bind(..), isBuiltinRule, rulesRules, rulesRhsFreeVars )
import CoreFVs ( exprSomeFreeVars, ruleSomeLhsFreeVars, ruleSomeFreeVars )
-import CoreUnfold ( okToUnfoldInHiFile, couldBeSmallEnoughToInline )
-import Name ( isLocallyDefined, getName, nameModule,
+import CoreUnfold ( okToUnfoldInHiFile, mkTopUnfolding, neverUnfold, unfoldingTemplate, noUnfolding )
+import Name ( isLocallyDefined, getName,
Name, NamedThing(..),
- plusNameEnv, lookupNameEnv, emptyNameEnv, extendNameEnv, lookupNameEnv_NF, nameEnvElts
+ plusNameEnv, lookupNameEnv, emptyNameEnv, mkNameEnv,
+ extendNameEnv, lookupNameEnv_NF, nameEnvElts
)
+import OccName ( pprOccName )
import TyCon ( TyCon, getSynTyConDefn, isSynTyCon, isNewTyCon, isAlgTyCon,
tyConTheta, tyConTyVars, tyConDataCons, tyConFamilySize
)
import Class ( classExtraBigSig, DefMeth(..) )
import FieldLabel ( fieldLabelType )
import Type ( splitSigmaTy, tidyTopType, deNoteType )
-
-import Rules ( ProtoCoreRule(..) )
-
-import Bag ( bagToList )
-import UniqFM ( lookupUFM, listToUFM )
import SrcLoc ( noSrcLoc )
-import Bag
import Outputable
+import Module ( ModuleName, moduleName )
import List ( partition )
+import IO ( IOMode(..), openFile, hClose )
\end{code}
%************************************************************************
\begin{code}
-completeModDetails :: ModDetails
- -> [CoreBind] -> [Id] -- Final bindings, plus the top-level Ids from the
- -- code generator; they have authoritative arity info
- -> [ProtoCoreRule] -- Tidy orphan rules
- -> ModDetails
+mkModDetails :: TypeEnv -> [DFunId] -- From typechecker
+ -> [CoreBind] -> [Id] -- Final bindings, plus the top-level Ids from the
+ -- code generator; they have authoritative arity info
+ -> [IdCoreRule] -- Tidy orphan rules
+ -> ModDetails
+mkModDetails type_env dfun_ids tidy_binds stg_ids orphan_rules
+ = ModDetails { md_types = new_type_env,
+ md_rules = rule_dcls,
+ md_insts = dfun_ids }
+ where
+ -- The competed type environment is gotten from
+ -- a) keeping the types and classes
+ -- b) removing all Ids, and Ids with correct IdInfo
+ -- gotten from the bindings
+ new_type_env = mkNameEnv [(getName tycl, tycl) | tycl <- orig_type_env, isTyClThing tycl]
+ `plusNameEnv`
+ mkNameEnv [(idName id, AnId id) | id <- final_ids]
+
+ orig_type_env = nameEnvElts type_env
+
+ final_ids = bindsToIds (mkVarSet dfun_ids `unionVarSet` orphan_rule_ids)
+ (mkVarSet stg_ids)
+ tidy_binds
+
+ -- The complete rules are gotten by combining
+ -- a) the orphan rules
+ -- b) rules embedded in the top-level Ids
+ rule_dcls | opt_OmitInterfacePragmas = []
+ | otherwise = getRules orphan_rules tidy_binds (mkVarSet final_ids)
+
+ orphan_rule_ids = unionVarSets [ ruleSomeFreeVars interestingId rule
+ | (_, rule) <- orphan_rules]
+
+
+-- This version is used when we are re-linking a module
+-- so we've only run the type checker on its previous interface
+mkModDetailsFromIface :: TypeEnv -> [DFunId] -- From typechecker
+ -> [TypecheckedRuleDecl]
+ -> ModDetails
+mkModDetailsFromIface type_env dfun_ids rules
+ = ModDetails { md_types = type_env,
+ md_rules = rule_dcls,
+ md_insts = dfun_ids }
+ where
+ rule_dcls = [(id,rule) | IfaceRuleOut id rule <- rules]
+ -- All the rules from an interface are of the IfaceRuleOut form
+
completeIface :: Maybe ModIface -- The old interface, if we have it
-> ModIface -- The new one, minus the decls and versions
-- The IO in the type is solely for debug output
-- In particular, dumping a record of what has changed
completeIface maybe_old_iface new_iface mod_details
- tidy_binds final_ids tidy_orphan_rules
- = let
- new_decls = declsFromDetails mod_details tidy_binds final_ids tidy_orphan_rules
- in
- addVersionInfo maybe_old_iface (new_iface { mi_decls = new_decls })
-
-declsFromDetails :: ModDetails -> [CoreBind] -> [Id] -> [ProtoCoreRule] -> IfaceDecls
-declsFromDetails details tidy_binds final_ids tidy_orphan_rules
- = IfaceDecls { dcl_tycl = ty_cls_dcls ++ bagToList val_dcls,
- dcl_insts = inst_dcls,
- dcl_rules = rule_dcls }
- where
- dfun_ids = md_insts details
- inst_dcls = map ifaceInstance dfun_ids
- ty_cls_dcls = map ifaceTyCls (filter emitTyCls (nameEnvElts (md_types details)))
-
- (val_dcls, emitted_ids) = ifaceBinds (mkVarSet dfun_ids `unionVarSet` orphan_rule_ids)
- final_ids tidy_binds
-
- rule_dcls | opt_OmitInterfacePragmas = []
- | otherwise = ifaceRules tidy_orphan_rules emitted_ids
-
- orphan_rule_ids = unionVarSets [ ruleSomeFreeVars interestingId rule
- | ProtoCoreRule _ _ rule <- tidy_orphan_rules]
+ = addVersionInfo maybe_old_iface (new_iface { mi_decls = new_decls })
+ where
+ new_decls = IfaceDecls { dcl_tycl = ty_cls_dcls,
+ dcl_insts = inst_dcls,
+ dcl_rules = rule_dcls }
+ inst_dcls = map ifaceInstance (md_insts mod_details)
+ ty_cls_dcls = map ifaceTyCls (nameEnvElts (md_types mod_details))
+ rule_dcls = map ifaceRule (md_rules mod_details)
\end{code}
+
%************************************************************************
%* *
\subsection{Types and classes}
%************************************************************************
\begin{code}
-emitTyCls :: TyThing -> Bool
-emitTyCls (ATyCon tc) = True -- Could filter out wired in ones, but it's not
- -- strictly necessary, and it costs extra time
-emitTyCls (AClass cl) = True
-emitTyCls (AnId _) = False
-
-
ifaceTyCls :: TyThing -> RenamedTyClDecl
ifaceTyCls (AClass clas)
= ClassDecl (toHsContext sc_theta)
= ([getName field_label], mk_bang_ty strict_mark (fieldLabelType field_label))
ifaceTyCls (ATyCon tycon) = pprPanic "ifaceTyCls" (ppr tycon)
+
+ifaceTyCls (AnId id)
+ = IfaceSig (getName id) (toHsType id_type) hs_idinfo noSrcLoc
+ where
+ id_type = idType id
+ id_info = idInfo id
+
+ hs_idinfo | opt_OmitInterfacePragmas = []
+ | otherwise = arity_hsinfo ++ caf_hsinfo ++ cpr_hsinfo ++
+ strict_hsinfo ++ wrkr_hsinfo ++ unfold_hsinfo
+
+ ------------ Arity --------------
+ arity_hsinfo = case arityInfo id_info of
+ a@(ArityExactly n) -> [HsArity a]
+ other -> []
+
+ ------------ Caf Info --------------
+ caf_hsinfo = case cafInfo id_info of
+ NoCafRefs -> [HsNoCafRefs]
+ otherwise -> []
+
+ ------------ CPR Info --------------
+ cpr_hsinfo = case cprInfo id_info of
+ ReturnsCPR -> [HsCprInfo]
+ NoCPRInfo -> []
+
+ ------------ Strictness --------------
+ strict_hsinfo = case strictnessInfo id_info of
+ NoStrictnessInfo -> []
+ info -> [HsStrictness info]
+
+
+ ------------ Worker --------------
+ wrkr_hsinfo = case workerInfo id_info of
+ HasWorker work_id wrap_arity -> [HsWorker (getName work_id)]
+ NoWorker -> []
+
+ ------------ Unfolding --------------
+ unfold_info = unfoldingInfo id_info
+ inline_prag = inlinePragInfo id_info
+ rhs = unfoldingTemplate unfold_info
+ unfold_hsinfo | neverUnfold unfold_info = []
+ | otherwise = [HsUnfold inline_prag (toUfExpr rhs)]
\end{code}
-- instance Foo Tibble where ...
-- and this instance decl wouldn't get imported into a module
-- that mentioned T but not Tibble.
-\end{code}
-\begin{code}
-ifaceRules :: [ProtoCoreRule] -> IdSet -> [RenamedRuleDecl]
-ifaceRules rules emitted
- = orphan_rules ++ local_rules
- where
- orphan_rules = [ toHsRule fn rule | ProtoCoreRule _ fn rule <- rules ]
- local_rules = [ toHsRule fn rule
- | fn <- varSetElems emitted,
- rule <- rulesRules (idSpecialisation fn),
- not (isBuiltinRule rule),
- -- We can't print builtin rules in interface files
- -- Since they are built in, an importing module
- -- will have access to them anyway
+ifaceRule (id, BuiltinRule _)
+ = pprTrace "toHsRule: builtin" (ppr id) (bogusIfaceRule id)
- -- Sept 00: I've disabled this test. It doesn't stop many, if any, rules
- -- from coming out, and to make it work properly we need to add ????
- -- (put it back in for now)
- all (`elemVarSet` emitted) (varSetElems (ruleSomeLhsFreeVars interestingId rule))
- -- Spit out a rule only if all its lhs free vars are emitted
- -- This is a good reason not to do it when we emit the Id itself
- ]
+ifaceRule (id, Rule name bndrs args rhs)
+ = IfaceRule name (map toUfBndr bndrs) (getName id)
+ (map toUfExpr args) (toUfExpr rhs) noSrcLoc
+
+bogusIfaceRule id
+ = IfaceRule SLIT("bogus") [] (getName id) [] (UfVar (getName id)) noSrcLoc
\end{code}
%************************************************************************
%* *
-\subsection{Value bindings}
+\subsection{Compute final Ids}
%* *
%************************************************************************
+A "final Id" has exactly the IdInfo for going into an interface file, or
+exporting to another module.
+
\begin{code}
-ifaceBinds :: IdSet -- These Ids are needed already
- -> [Id] -- Ids used at code-gen time; they have better pragma info!
+bindsToIds :: IdSet -- These Ids are needed already
+ -> IdSet -- Ids used at code-gen time; they have better pragma info!
-> [CoreBind] -- In dependency order, later depend on earlier
- -> (Bag RenamedIfaceSig, IdSet) -- Set of Ids actually spat out
+ -> [Id] -- Set of Ids actually spat out, complete with exactly the IdInfo
+ -- they need for exporting to another module
-ifaceBinds needed_ids final_ids binds
- = go needed_ids (reverse binds) emptyBag emptyVarSet
+bindsToIds needed_ids codegen_ids binds
+ = go needed_ids (reverse binds) []
-- Reverse so that later things will
-- provoke earlier ones to be emitted
where
- final_id_map = listToUFM [(id,id) | id <- final_ids]
- get_idinfo id = case lookupUFM final_id_map id of
- Just id' -> idInfo id'
- Nothing -> pprTrace "ifaceBinds not found:" (ppr id) $
- idInfo id
-
-- The 'needed' set contains the Ids that are needed by earlier
-- interface file emissions. If the Id isn't in this set, and isn't
-- exported, there's no need to emit anything
need_id needed_set id = id `elemVarSet` needed_set || isUserExportedId id
- go needed [] decls emitted
+ go needed [] emitted
| not (isEmptyVarSet needed) = pprTrace "ifaceBinds: free vars:"
(sep (map ppr (varSetElems needed)))
- (decls, emitted)
- | otherwise = (decls, emitted)
+ emitted
+ | otherwise = emitted
- go needed (NonRec id rhs : binds) decls emitted
+ go needed (NonRec id rhs : binds) emitted
| need_id needed id
= if omitIfaceSigForId id then
- go (needed `delVarSet` id) binds decls (emitted `extendVarSet` id)
+ go (needed `delVarSet` id) binds (id:emitted)
else
go ((needed `unionVarSet` extras) `delVarSet` id)
binds
- (decl `consBag` decls)
- (emitted `extendVarSet` id)
+ (new_id:emitted)
| otherwise
- = go needed binds decls emitted
+ = go needed binds emitted
where
- (decl, extras) = ifaceId get_idinfo False id rhs
+ (new_id, extras) = mkFinalId codegen_ids False id rhs
-- Recursive groups are a bit more of a pain. We may only need one to
-- start with, but it may call out the next one, and so on. So we
-- have to look for a fixed point. We don't want necessarily them all,
-- because without -O we may only need the first one (if we don't emit
-- its unfolding)
- go needed (Rec pairs : binds) decls emitted
- = go needed' binds decls' emitted'
+ go needed (Rec pairs : binds) emitted
+ = go needed' binds emitted'
where
- (new_decls, new_emitted, extras) = go_rec needed pairs
- decls' = new_decls `unionBags` decls
+ (new_emitted, extras) = go_rec needed pairs
needed' = (needed `unionVarSet` extras) `minusVarSet` mkVarSet (map fst pairs)
- emitted' = emitted `unionVarSet` new_emitted
+ emitted' = new_emitted ++ emitted
- go_rec :: IdSet -> [(Id,CoreExpr)] -> (Bag RenamedIfaceSig, IdSet, IdSet)
+ go_rec :: IdSet -> [(Id,CoreExpr)] -> ([Id], IdSet)
go_rec needed pairs
- | null decls = (emptyBag, emptyVarSet, emptyVarSet)
- | otherwise = (more_decls `unionBags` listToBag decls,
- more_emitted `unionVarSet` mkVarSet (map fst needed_prs),
- more_extras `unionVarSet` extras)
+ | null needed_prs = ([], emptyVarSet)
+ | otherwise = (emitted ++ more_emitted,
+ extras `unionVarSet` more_extras)
where
- (needed_prs,leftover_prs) = partition is_needed pairs
- (decls, extras_s) = unzip [ifaceId get_idinfo True id rhs
- | (id,rhs) <- needed_prs, not (omitIfaceSigForId id)]
- extras = unionVarSets extras_s
- (more_decls, more_emitted, more_extras) = go_rec extras leftover_prs
+ (needed_prs,leftover_prs) = partition is_needed pairs
+ (emitted, extras_s) = unzip [ mkFinalId codegen_ids True id rhs
+ | (id,rhs) <- needed_prs, not (omitIfaceSigForId id)]
+ extras = unionVarSets extras_s
+ (more_emitted, more_extras) = go_rec extras leftover_prs
+
is_needed (id,_) = need_id needed id
\end{code}
+
\begin{code}
-ifaceId :: (Id -> IdInfo) -- This function "knows" the extra info added
- -- by the STG passes. Sigh
- -> Bool -- True <=> recursive, so don't print unfolding
- -> Id
- -> CoreExpr -- The Id's right hand side
- -> (RenamedTyClDecl, IdSet) -- The emitted stuff, plus any *extra* needed Ids
-
-ifaceId get_idinfo is_rec id rhs
- = (IfaceSig (getName id) (toHsType id_type) hs_idinfo noSrcLoc, new_needed_ids)
+mkFinalId :: IdSet -- The Ids with arity info from the code generator
+ -> Bool -- True <=> recursive, so don't include unfolding
+ -> Id
+ -> CoreExpr -- The Id's right hand side
+ -> (Id, IdSet) -- The emitted id, plus any *extra* needed Ids
+
+mkFinalId codegen_ids is_rec id rhs
+ = (id `setIdInfo` new_idinfo, new_needed_ids)
where
- id_type = idType id
core_idinfo = idInfo id
- stg_idinfo = get_idinfo id
+ stg_idinfo = case lookupVarSet codegen_ids id of
+ Just id' -> idInfo id'
+ Nothing -> pprTrace "ifaceBinds not found:" (ppr id) $
+ idInfo id
- hs_idinfo | opt_OmitInterfacePragmas = []
- | otherwise = arity_hsinfo ++ caf_hsinfo ++ cpr_hsinfo ++
- strict_hsinfo ++ wrkr_hsinfo ++ unfold_hsinfo
+ new_idinfo | opt_OmitInterfacePragmas
+ = vanillaIdInfo
+ | otherwise
+ = core_idinfo `setArityInfo` arity_info
+ `setCafInfo` cafInfo stg_idinfo
+ `setUnfoldingInfo` unfold_info
+ `setWorkerInfo` worker_info
+ `setSpecInfo` emptyCoreRules
+ -- We zap the specialisations because they are
+ -- passed on separately through the modules IdCoreRules
------------ Arity --------------
- arity_info = arityInfo stg_idinfo
- stg_arity = arityLowerBound arity_info
- arity_hsinfo = case arityInfo stg_idinfo of
- a@(ArityExactly n) -> [HsArity a]
- other -> []
-
- ------------ Caf Info --------------
- caf_hsinfo = case cafInfo stg_idinfo of
- NoCafRefs -> [HsNoCafRefs]
- otherwise -> []
-
- ------------ CPR Info --------------
- cpr_hsinfo = case cprInfo core_idinfo of
- ReturnsCPR -> [HsCprInfo]
- NoCPRInfo -> []
-
- ------------ Strictness --------------
- strict_info = strictnessInfo core_idinfo
- bottoming_fn = isBottomingStrictness strict_info
- strict_hsinfo = case strict_info of
- NoStrictnessInfo -> []
- info -> [HsStrictness info]
-
+ arity_info = arityInfo stg_idinfo
+ stg_arity = arityLowerBound arity_info
------------ Worker --------------
-- We only treat a function as having a worker if
-- top level lambdas are there" in interface files; but during the
-- compilation of this module it means "how many things can I apply
-- this to".
- work_info = workerInfo core_idinfo
- HasWorker work_id _ = work_info
+ worker_info = case workerInfo core_idinfo of
+ info@(HasWorker work_id wrap_arity)
+ | wrap_arity == stg_arity -> info
+ | otherwise -> pprTrace "ifaceId: arity change:" (ppr id)
+ NoWorker
+ NoWorker -> NoWorker
- has_worker = case work_info of
- HasWorker work_id wrap_arity
- | wrap_arity == stg_arity -> True
- | otherwise -> pprTrace "ifaceId: arity change:" (ppr id)
- False
-
- other -> False
+ has_worker = case worker_info of
+ HasWorker _ _ -> True
+ other -> False
- wrkr_hsinfo | has_worker = [HsWorker (getName work_id)]
- | otherwise = []
+ HasWorker work_id _ = worker_info
------------ Unfolding --------------
inline_pragma = inlinePragInfo core_idinfo
dont_inline = isNeverInlinePrag inline_pragma
+ loop_breaker = isLoopBreaker (occInfo core_idinfo)
+ bottoming_fn = isBottomingStrictness (strictnessInfo core_idinfo)
- unfold_hsinfo | show_unfold = [HsUnfold inline_pragma (toUfExpr rhs)]
- | otherwise = []
+ unfolding = mkTopUnfolding rhs
+ rhs_is_small = neverUnfold unfolding
+
+ unfold_info | show_unfold = unfolding
+ | otherwise = noUnfolding
show_unfold = not has_worker && -- Not unnecessary
not bottoming_fn && -- Not necessary
rhs_is_small && -- Small enough
okToUnfoldInHiFile rhs -- No casms etc
- rhs_is_small = couldBeSmallEnoughToInline opt_UF_HiFileThreshold rhs
-
- ------------ Specialisations --------------
- spec_info = specInfo core_idinfo
-
- ------------ Occ info --------------
- loop_breaker = isLoopBreaker (occInfo core_idinfo)
------------ Extra free Ids --------------
new_needed_ids | opt_OmitInterfacePragmas = emptyVarSet
unfold_ids `unionVarSet`
spec_ids
+ spec_ids = filterVarSet interestingId (rulesRhsFreeVars (specInfo core_idinfo))
+
worker_ids | has_worker && interestingId work_id = unitVarSet work_id
-- Conceivably, the worker might come from
-- another module
| otherwise = emptyVarSet
- spec_ids = filterVarSet interestingId (rulesRhsFreeVars spec_info)
-
unfold_ids | show_unfold = find_fvs rhs
| otherwise = emptyVarSet
\end{code}
+\begin{code}
+getRules :: [IdCoreRule] -- Orphan rules
+ -> [CoreBind] -- Bindings, with rules in the top-level Ids
+ -> IdSet -- Ids that are exported, so we need their rules
+ -> [IdCoreRule]
+getRules orphan_rules binds emitted
+ = orphan_rules ++ local_rules
+ where
+ local_rules = [ (fn, rule)
+ | fn <- bindersOfBinds binds,
+ fn `elemVarSet` emitted,
+ rule <- rulesRules (idSpecialisation fn),
+ not (isBuiltinRule rule),
+ -- We can't print builtin rules in interface files
+ -- Since they are built in, an importing module
+ -- will have access to them anyway
+
+ -- Sept 00: I've disabled this test. It doesn't stop many, if any, rules
+ -- from coming out, and to make it work properly we need to add ????
+ -- (put it back in for now)
+ all (`elemVarSet` emitted) (varSetElems (ruleSomeLhsFreeVars interestingId rule))
+ -- Spit out a rule only if all its lhs free vars are emitted
+ -- This is a good reason not to do it when we emit the Id itself
+ ]
+\end{code}
+
+
%************************************************************************
%* *
\subsection{Checking if the new interface is up to date
= Nothing
| otherwise -- Add updated version numbers
- = Just (final_iface, pp_tc_diffs $$ pp_sig_diffs)
+ = Just (final_iface, pp_tc_diffs)
where
final_iface = new_iface { mi_version = new_version }
new_version = VersionInfo { vers_module = bumpVersion no_output_change (vers_module old_version),
vers_exports = bumpVersion no_export_change (vers_exports old_version),
vers_rules = bumpVersion no_rule_change (vers_rules old_version),
- vers_decls = sig_vers `plusNameEnv` tc_vers }
+ vers_decls = tc_vers }
no_output_change = no_tc_change && no_rule_change && no_export_change
no_usage_change = mi_usages old_iface == mi_usages new_iface
-- Set the flag if anything changes.
-- Assumes that the decls are sorted by hsDeclName.
old_vers_decls = vers_decls old_version
- (no_tc_change, pp_tc_diffs, tc_vers) = diffDecls old_vers_decls (dcl_tycl old_decls) (dcl_tycl new_decls)
+ (no_tc_change, pp_tc_diffs, tc_vers) = diffDecls old_vers_decls old_fixities new_fixities
+ (dcl_tycl old_decls) (dcl_tycl new_decls)
diffDecls :: NameEnv Version -- Old version map
+ -> NameEnv Fixity -> NameEnv Fixity -- Old and new fixities
-> [RenamedTyClDecl] -> [RenamedTyClDecl] -- Old and new decls
-> (Bool, -- True <=> no change
SDoc, -- Record of differences
NameEnv Version) -- New version
-diffDecls old_vers old new
+diffDecls old_vers old_fixities new_fixities old new
= diff True empty emptyNameEnv old new
where
-- When seeing if two decls are the same,
= case od_name `compare` nd_name of
LT -> diff False (pp $$ only_old od) new_vers ods (nd:nds)
GT -> diff False (pp $$ only_new nd) new_vers (od:ods) nds
- EQ | od `eq` nd -> diff ok_so_far pp new_vers ods nds
- | otherwise -> diff False (pp $$ changed od nd) new_vers' ods nds
+ EQ | od `eq_tc` nd -> diff ok_so_far pp new_vers ods nds
+ | otherwise -> diff False (pp $$ changed od nd) new_vers' ods nds
where
- od_name = get_name od
- nd_name = get_name nd
+ od_name = tyClDeclName od
+ nd_name = tyClDeclName nd
new_vers' = extendNameEnv new_vers nd_name
(bumpVersion True (lookupNameEnv_NF old_vers od_name))
changed d nd = ptext SLIT("Changed in iface: ") <+> ((ptext SLIT("Old:") <+> ppr d) $$
(ptext SLIT("New:") <+> ppr nd))
\end{code}
+
+
+
+%************************************************************************
+%* *
+\subsection{Writing an interface file}
+%* *
+%************************************************************************
+
+\begin{code}
+writeIface :: Finder -> Maybe ModIface -> IO ()
+writeIface finder Nothing
+ = return ()
+
+writeIface finder (Just mod_iface)
+ = do { maybe_found <- finder mod_name ;
+ ; case maybe_found of {
+ Nothing -> printErrs (text "Can't write interface file for" <+> ppr mod_name) ;
+ Just (_, locn) ->
+
+ do { let filename = hi_file locn
+ ; if_hdl <- openFile filename WriteMode
+ ; printForIface if_hdl (pprIface mod_iface)
+ ; hClose if_hdl
+ }}}
+ where
+ mod_name = moduleName (mi_module mod_iface)
+
+pprIface iface
+ = vcat [ ptext SLIT("__interface")
+ <+> doubleQuotes (ptext opt_InPackage)
+ <+> ppr (mi_module iface) <+> ppr (vers_module version_info)
+ <+> pp_sub_vers
+ <+> (if mi_orphan iface then char '!' else empty)
+ <+> int opt_HiVersion
+ <+> ptext SLIT("where")
+
+ , vcat (map pprExport (mi_exports iface))
+ , vcat (map pprUsage (mi_usages iface))
+
+ , pprIfaceDecls (vers_decls version_info)
+ (mi_fixities iface)
+ (mi_decls iface)
+
+ , pprDeprecs (mi_deprecs iface)
+ ]
+ where
+ version_info = mi_version iface
+ exp_vers = vers_exports version_info
+ rule_vers = vers_rules version_info
+
+ pp_sub_vers | exp_vers == initialVersion && rule_vers == initialVersion = empty
+ | otherwise = brackets (ppr exp_vers <+> ppr rule_vers)
+\end{code}
+
+When printing export lists, we print like this:
+ Avail f f
+ AvailTC C [C, x, y] C(x,y)
+ AvailTC C [x, y] C!(x,y) -- Exporting x, y but not C
+
+\begin{code}
+pprExport :: (ModuleName, Avails) -> SDoc
+pprExport (mod, items)
+ = hsep [ ptext SLIT("__export "), ppr mod, hsep (map pp_avail items) ] <> semi
+ where
+ ppr_name :: Name -> SDoc -- Print the occurrence name only
+ ppr_name n = ppr (nameOccName n)
+
+ pp_avail :: AvailInfo -> SDoc
+ pp_avail (Avail name) = ppr_name name
+ pp_avail (AvailTC name []) = empty
+ pp_avail (AvailTC name ns) = hcat [ppr_name name, bang, pp_export ns']
+ where
+ bang | name `elem` ns = empty
+ | otherwise = char '|'
+ ns' = filter (/= name) ns
+
+ pp_export [] = empty
+ pp_export names = braces (hsep (map ppr_name names))
+\end{code}
+
+
+\begin{code}
+pprUsage :: ImportVersion Name -> SDoc
+pprUsage (m, has_orphans, is_boot, whats_imported)
+ = hsep [ptext SLIT("import"), ppr m,
+ pp_orphan, pp_boot,
+ pp_versions whats_imported
+ ] <> semi
+ where
+ pp_orphan | has_orphans = char '!'
+ | otherwise = empty
+ pp_boot | is_boot = char '@'
+ | otherwise = empty
+
+ -- Importing the whole module is indicated by an empty list
+ pp_versions NothingAtAll = empty
+ pp_versions (Everything v) = dcolon <+> int v
+ pp_versions (Specifically vm ve nvs vr) = dcolon <+> int vm <+> pp_export_version ve <+> int vr
+ <+> hsep [ ppr n <+> int v | (n,v) <- nvs ]
+
+ -- HACK for the moment: print the export-list version even if
+ -- we don't use it, so that syntax of interface files doesn't change
+ pp_export_version Nothing = int 1
+ pp_export_version (Just v) = int v
+\end{code}
+
+\begin{code}
+pprIfaceDecls version_map fixity_map decls
+ = vcat [ vcat [ppr i <+> semi | i <- dcl_insts decls]
+ , vcat (map ppr_decl (dcl_tycl decls))
+ , pprRules (dcl_rules decls)
+ ]
+ where
+ ppr_decl d = (ppr_vers d <+> ppr d <> semi) $$ ppr_fixes d
+
+ -- Print the version for the decl
+ ppr_vers d = case lookupNameEnv version_map (tyClDeclName d) of
+ Nothing -> empty
+ Just v -> int v
+
+ -- Print fixities relevant to the decl
+ ppr_fixes d = vcat [ ppr fix <+> ppr n <> semi
+ | (n,_) <- tyClDeclNames d,
+ Just fix <- [lookupNameEnv fixity_map n]
+ ]
+\end{code}
+
+\begin{code}
+pprRules [] = empty
+pprRules rules = hsep [ptext SLIT("{-## __R"), vcat (map ppr rules), ptext SLIT("##-}")]
+
+pprDeprecs NoDeprecs = empty
+pprDeprecs deprecs = ptext SLIT("{-## __D") <+> guts <+> ptext SLIT("##-}")
+ where
+ guts = case deprecs of
+ DeprecAll txt -> ptext txt
+ DeprecSome env -> pp_deprecs env
+
+pp_deprecs env = vcat (punctuate semi (map pp_deprec (nameEnvElts env)))
+ where
+ pp_deprec (name, txt) = pprOccName (nameOccName name) <+> ptext txt
+\end{code}
projects / ghc-hetmet.git / blobdiff