%
-% (c) The GRASP/AQUA Project, Glasgow University, 1992-1995
+% (c) The GRASP/AQUA Project, Glasgow University, 1992-1998
%
\section[Desugar]{@deSugar@: the main function}
\begin{code}
-#include "HsVersions.h"
-
-module Desugar (
- deSugar,
-
- -- and to make the interface self-sufficient...
- SplitUniqSupply, Binds, Expr, Id, TypecheckedPat,
- CoreBinding, GlobalSwitch, SwitchResult,
- Bag, DsMatchContext, DsMatchKind
- ) where
-
+module Desugar ( deSugar ) where
-import AbsSyn -- the stuff being desugared
-import PlainCore -- the output of desugaring;
- -- importing this module also gets all the
- -- CoreSyn utility functions
-import DsMonad -- the monadery used in the desugarer
+#include "HsVersions.h"
-import Bag ( unionBags, Bag )
-import CmdLineOpts ( switchIsOn, GlobalSwitch(..), SwitchResult )
-import CoreLift ( liftCoreBindings )
-import CoreLint ( lintCoreBindings )
-import DsBinds ( dsBinds, dsInstBinds )
-import IdEnv
-import Pretty ( PprStyle(..) )
-import SplitUniq
-import Util
+import CmdLineOpts ( opt_D_dump_ds )
+import HsSyn ( MonoBinds )
+import TcHsSyn ( TypecheckedMonoBinds, TypecheckedForeignDecl )
+import CoreSyn
+import DsMonad
+import DsBinds ( dsMonoBinds )
+import DsForeign ( dsForeigns )
+import DsUtils
+import DsExpr () -- Forces DsExpr to be compiled; DsBinds only
+ -- depends on DsExpr.hi-boot.
+import Name ( Module, moduleString )
+import Bag ( isEmptyBag )
+import CmdLineOpts ( opt_SccGroup, opt_SccProfilingOn )
+import CoreLint ( beginPass, endPass )
+import ErrUtils ( doIfSet )
+import Outputable
+import UniqSupply ( splitUniqSupply, UniqSupply )
\end{code}
-The only trick here is to get the @DesugarMonad@ stuff off to a good
+The only trick here is to get the @DsMonad@ stuff off to a good
start.
\begin{code}
-deSugar :: SplitUniqSupply -- name supply
- -> (GlobalSwitch->SwitchResult) -- switch looker upper
- -> FAST_STRING -- module name
-
- -> (TypecheckedBinds, -- input: class, instance, and value
- TypecheckedBinds, -- bindings; see "tcModule" (which produces
- TypecheckedBinds, -- them)
- [(Inst, TypecheckedExpr)])
--- ToDo: handling of const_inst thingies is certainly WRONG ***************************
-
- -> ([PlainCoreBinding], -- output
- Bag DsMatchContext) -- Shadowing complaints
-
-deSugar us sw_chkr mod_name (clas_binds, inst_binds, val_binds, const_inst_pairs)
- = let
- (us0, us0a) = splitUniqSupply us
- (us1, us1a) = splitUniqSupply us0a
- (us2, us2a) = splitUniqSupply us1a
- (us3, us4) = splitUniqSupply us2a
-
- ((core_const_prs, consts_pairs), shadows1)
- = initDs us0 nullIdEnv sw_chkr mod_name (dsInstBinds [] const_inst_pairs)
-
- consts_env = mkIdEnv consts_pairs
-
- (core_clas_binds, shadows2)
- = initDs us1 consts_env sw_chkr mod_name (dsBinds clas_binds)
- core_clas_prs = pairsFromCoreBinds core_clas_binds
-
- (core_inst_binds, shadows3)
- = initDs us2 consts_env sw_chkr mod_name (dsBinds inst_binds)
- core_inst_prs = pairsFromCoreBinds core_inst_binds
-
- (core_val_binds, shadows4)
- = initDs us3 consts_env sw_chkr mod_name (dsBinds val_binds)
- core_val_pairs = pairsFromCoreBinds core_val_binds
-
- final_binds
- = if (null core_clas_prs && null core_inst_prs && null core_const_prs) then
- -- we don't have to make the whole thing recursive
- core_clas_binds ++ core_val_binds
-
- else -- gotta make it recursive (sigh)
- [CoRec (core_clas_prs ++ core_inst_prs ++ core_const_prs ++ core_val_pairs)]
-
- lift_final_binds = {-if switchIsOn sw_chkr GlasgowExts
- then-} liftCoreBindings us4 final_binds
- -- else final_binds
-
- really_final_binds = if switchIsOn sw_chkr DoCoreLinting
- then lintCoreBindings PprDebug "Desugarer" False lift_final_binds
- else lift_final_binds
+deSugar :: UniqSupply -- name supply
+ -> ValueEnv -- value env
+ -> Module -- module name
+ -> TypecheckedMonoBinds
+ -> [TypecheckedForeignDecl]
+ -> IO ([CoreBind], SDoc, SDoc) -- output
+
+deSugar us global_val_env mod_name all_binds fo_decls = do
+ beginPass "Desugar"
+ -- Do desugaring
+ let (core_prs, ds_warns) = initDs us1 global_val_env module_and_group
+ (dsMonoBinds opt_SccProfilingOn all_binds [])
+ ds_binds' = [Rec core_prs]
+
+ ((fi_binds, fe_binds, h_code, c_code), ds_warns2) =
+ initDs us3 global_val_env module_and_group (dsForeigns fo_decls)
+
+ ds_binds = fi_binds ++ ds_binds' ++ fe_binds
+
+ -- Display any warnings
+ doIfSet (not (isEmptyBag ds_warns))
+ (printErrs (pprDsWarnings ds_warns))
+
+ -- Lint result if necessary
+ endPass "Desugar" opt_D_dump_ds ds_binds
+ return (ds_binds, h_code, c_code)
+ where
+ (us1, us2) = splitUniqSupply us
+ (us3, us4) = splitUniqSupply us2
+
+ module_and_group = (mod_name, grp_name)
+ grp_name = case opt_SccGroup of
+ Just xx -> _PK_ xx
+ Nothing -> _PK_ (moduleString mod_name) -- default: module name
- shadows = shadows1 `unionBags` shadows2 `unionBags` shadows3 `unionBags` shadows4
- in
- (really_final_binds, shadows)
\end{code}
projects / ghc-hetmet.git / blobdiff