X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2FdeSugar%2FDesugar.lhs;h=a91859051753e4b79b1309b2a3fbf9667aa7067c;hb=e0445ffa5a89632b542e7d7bc2ad46d944716453;hp=8e2a33c8eb5716e90f8aee8e6e82d2b5a789e213;hpb=acc784b55045fe43b2d92efc992a4b888d96c682;p=ghc-hetmet.git diff --git a/ghc/compiler/deSugar/Desugar.lhs b/ghc/compiler/deSugar/Desugar.lhs index 8e2a33c..a918590 100644 --- a/ghc/compiler/deSugar/Desugar.lhs +++ b/ghc/compiler/deSugar/Desugar.lhs @@ -4,18 +4,19 @@ \section[Desugar]{@deSugar@: the main function} \begin{code} -module Desugar ( deSugar, deSugarExpr, - deSugarCore ) where +module Desugar ( deSugar, deSugarExpr ) where #include "HsVersions.h" -import CmdLineOpts ( DynFlags, DynFlag(..), dopt, opt_SccProfilingOn ) -import HscTypes ( ModDetails(..), TypeEnv ) +import CmdLineOpts ( DynFlag(..), dopt, opt_SccProfilingOn ) +import HscTypes ( ModGuts(..), ModGuts, HscEnv(..), ExternalPackageState(..), + PersistentCompilerState(..), + lookupType, unQualInScope ) import HsSyn ( MonoBinds, RuleDecl(..), RuleBndr(..), HsExpr(..), HsBinds(..), MonoBinds(..) ) -import TcHsSyn ( TypecheckedRuleDecl, TypecheckedHsExpr, - TypecheckedCoreBind ) -import TcModule ( TcResults(..) ) +import TcHsSyn ( TypecheckedRuleDecl, TypecheckedHsExpr ) +import TcRnTypes ( TcGblEnv(..), ImportAvails(..) ) +import MkIface ( mkUsageInfo ) import Id ( Id ) import CoreSyn import PprCore ( pprIdRules, pprCoreExpr ) @@ -26,17 +27,20 @@ import DsBinds ( dsMonoBinds, AutoScc(..) ) import DsForeign ( dsForeigns ) import DsExpr () -- Forces DsExpr to be compiled; DsBinds only -- depends on DsExpr.hi-boot. -import Module ( Module ) +import Module ( Module, moduleEnvElts ) import Id ( Id ) import NameEnv ( lookupNameEnv ) import VarEnv import VarSet -import Bag ( isEmptyBag ) +import Bag ( isEmptyBag, mapBag ) import CoreLint ( showPass, endPass ) -import ErrUtils ( doIfSet, dumpIfSet_dyn, pprBagOfWarnings ) +import ErrUtils ( doIfSet, dumpIfSet_dyn, pprBagOfWarnings, addShortWarnLocLine ) import Outputable +import qualified Pretty import UniqSupply ( mkSplitUniqSupply ) -import HscTypes ( HomeSymbolTable, PersistentCompilerState(..), TyThing(..), lookupType, ) +import SrcLoc ( SrcLoc ) +import FastString +import DATA_IOREF ( readIORef ) \end{code} %************************************************************************ @@ -45,86 +49,107 @@ import HscTypes ( HomeSymbolTable, PersistentCompilerState(..), TyThing(..), lo %* * %************************************************************************ -The only trick here is to get the @DsMonad@ stuff off to a good -start. - \begin{code} -deSugar :: DynFlags - -> PersistentCompilerState -> HomeSymbolTable - -> Module -> PrintUnqualified - -> TcResults - -> IO (ModDetails, (SDoc, SDoc, [FAST_STRING], [CoreBndr])) - -deSugar dflags pcs hst mod_name unqual - (TcResults {tc_env = type_env, - tc_binds = all_binds, - tc_insts = insts, - tc_rules = rules, --- tc_cbinds = core_binds, - tc_fords = fo_decls}) +deSugar :: HscEnv -> PersistentCompilerState + -> TcGblEnv -> IO ModGuts + +deSugar hsc_env pcs + (TcGblEnv { tcg_mod = mod, + tcg_type_env = type_env, + tcg_usages = usage_var, + tcg_imports = imports, + tcg_exports = exports, + tcg_rdr_env = rdr_env, + tcg_fix_env = fix_env, + tcg_deprecs = deprecs, + tcg_insts = insts, + tcg_binds = binds, + tcg_fords = fords, + tcg_rules = rules }) = do { showPass dflags "Desugar" ; us <- mkSplitUniqSupply 'd' + ; usages <- readIORef usage_var -- Do desugaring - ; let (ds_result, ds_warns) = initDs dflags us lookup mod_name - (dsProgram mod_name all_binds rules fo_decls) - - (ds_binds, ds_rules, foreign_stuff) = ds_result - -{- - addCoreBinds ls = - case core_binds of - [] -> ls - cs -> (Rec cs) : ls --} - mod_details = ModDetails { md_types = type_env, - md_insts = insts, - md_rules = ds_rules, - md_binds = ds_binds } + ; let ((ds_binds, ds_rules, ds_fords), ds_warns) + = initDs dflags us lookup mod + (dsProgram binds rules fords) + + warn_doc = pprBagOfWarnings (mapBag mk_warn ds_warns) -- Display any warnings ; doIfSet (not (isEmptyBag ds_warns)) - (printErrs unqual (pprBagOfWarnings ds_warns)) + (printErrs warn_doc) -- Lint result if necessary ; endPass dflags "Desugar" Opt_D_dump_ds ds_binds -- Dump output ; doIfSet (dopt Opt_D_dump_ds dflags) - (printDump (ppr_ds_rules ds_rules)) - - ; return (mod_details, foreign_stuff) + (printDump (ppr_ds_rules ds_rules)) + + ; let + deps = (moduleEnvElts (dep_mods imports), dep_pkgs imports) + mod_guts = ModGuts { + mg_module = mod, + mg_exports = exports, + mg_deps = deps, + mg_usages = mkUsageInfo hsc_env eps imports usages, + mg_dir_imps = [m | (m,_) <- moduleEnvElts (imp_mods imports)], + mg_rdr_env = rdr_env, + mg_fix_env = fix_env, + mg_deprecs = deprecs, + mg_types = type_env, + mg_insts = insts, + mg_rules = ds_rules, + mg_binds = ds_binds, + mg_foreign = ds_fords } + + ; return mod_guts } where + dflags = hsc_dflags hsc_env + print_unqual = unQualInScope rdr_env + + -- Desugarer warnings are SDocs; here we + -- add the info about whether or not to print unqualified + mk_warn :: (SrcLoc,SDoc) -> (SrcLoc, Pretty.Doc) + mk_warn (loc, sdoc) = addShortWarnLocLine loc print_unqual sdoc + -- The lookup function passed to initDs is used for well-known Ids, -- such as fold, build, cons etc, so the chances are -- it'll be found in the package symbol table. That's -- why we don't merge all these tables - pte = pcs_PTE pcs - lookup n = case lookupType hst pte n of { - Just (AnId v) -> v ; + eps = pcs_EPS pcs + pte = eps_PTE eps + hpt = hsc_HPT hsc_env + lookup n = case lookupType hpt pte n of { + Just v -> v ; other -> case lookupNameEnv type_env n of - Just (AnId v) -> v ; + Just v -> v ; other -> pprPanic "Desugar: lookup:" (ppr n) } -deSugarExpr :: DynFlags - -> PersistentCompilerState -> HomeSymbolTable +deSugarExpr :: HscEnv + -> PersistentCompilerState -> Module -> PrintUnqualified -> TypecheckedHsExpr -> IO CoreExpr -deSugarExpr dflags pcs hst mod_name unqual tc_expr +deSugarExpr hsc_env pcs mod_name unqual tc_expr = do { showPass dflags "Desugar" ; us <- mkSplitUniqSupply 'd' -- Do desugaring ; let (core_expr, ds_warns) = initDs dflags us lookup mod_name (dsExpr tc_expr) + warn_doc = pprBagOfWarnings (mapBag mk_warn ds_warns) + mk_warn :: (SrcLoc,SDoc) -> (SrcLoc, Pretty.Doc) + mk_warn (loc,sdoc) = addShortWarnLocLine loc unqual sdoc -- Display any warnings ; doIfSet (not (isEmptyBag ds_warns)) - (printErrs unqual (pprBagOfWarnings ds_warns)) + (printErrs warn_doc) -- Dump output ; dumpIfSet_dyn dflags Opt_D_dump_ds "Desugared" (pprCoreExpr core_expr) @@ -132,14 +157,16 @@ deSugarExpr dflags pcs hst mod_name unqual tc_expr ; return core_expr } where - pte = pcs_PTE pcs - lookup n = case lookupType hst pte n of - Just (AnId v) -> v - other -> pprPanic "Desugar: lookup:" (ppr n) - -dsProgram mod_name all_binds rules fo_decls + dflags = hsc_dflags hsc_env + hpt = hsc_HPT hsc_env + pte = eps_PTE (pcs_EPS pcs) + lookup n = case lookupType hpt pte n of + Just v -> v + other -> pprPanic "Desugar: lookup:" (ppr n) + +dsProgram all_binds rules fo_decls = dsMonoBinds auto_scc all_binds [] `thenDs` \ core_prs -> - dsForeigns mod_name fo_decls `thenDs` \ (fe_binders, foreign_binds, h_code, c_code, headers) -> + dsForeigns fo_decls `thenDs` \ (ds_fords, foreign_binds) -> let ds_binds = [Rec (foreign_binds ++ core_prs)] -- Notice that we put the whole lot in a big Rec, even the foreign binds @@ -150,8 +177,8 @@ dsProgram mod_name all_binds rules fo_decls local_binders = mkVarSet (bindersOfBinds ds_binds) in - mapDs (dsRule local_binders) rules `thenDs` \ rules' -> - returnDs (ds_binds, rules', (h_code, c_code, headers, fe_binders)) + mapDs (dsRule local_binders) rules `thenDs` \ ds_rules -> + returnDs (ds_binds, ds_rules, ds_fords) where auto_scc | opt_SccProfilingOn = TopLevel | otherwise = NoSccs @@ -162,24 +189,6 @@ ppr_ds_rules rules pprIdRules rules \end{code} -Simplest thing in the world, desugaring External Core: - -\begin{code} -deSugarCore :: TypeEnv -> [TypecheckedCoreBind] - -> IO (ModDetails, (SDoc, SDoc, [FAST_STRING], [CoreBndr])) -deSugarCore type_env cs = do - let - mod_details - = ModDetails { md_types = type_env - , md_insts = [] - , md_rules = [] - , md_binds = [Rec (map (\ (lhs,_,rhs) -> (lhs,rhs)) cs)] - } - - no_foreign_stuff = (empty,empty,[],[]) - return (mod_details, no_foreign_stuff) - -\end{code} %************************************************************************