\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 )
import HsSyn ( MonoBinds, RuleDecl(..), RuleBndr(..),
HsExpr(..), HsBinds(..), MonoBinds(..) )
-import TcHsSyn ( TypecheckedRuleDecl, TypecheckedHsExpr,
- TypecheckedCoreBind )
-import TcModule ( TcResults(..) )
+import TcHsSyn ( TypecheckedRuleDecl, TypecheckedHsExpr )
+import TcRnTypes ( TcGblEnv(..), ImportAvails(imp_mods) )
+import MkIface ( mkUsageInfo )
import Id ( Id )
import CoreSyn
import PprCore ( pprIdRules, pprCoreExpr )
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 CoreLint ( showPass, endPass )
-import ErrUtils ( doIfSet, dumpIfSet_dyn, pprBagOfWarnings )
+import ErrUtils ( doIfSet, dumpIfSet_dyn, pprBagOfWarnings, addShortWarnLocLine )
import Outputable
import UniqSupply ( mkSplitUniqSupply )
-import HscTypes ( HomeSymbolTable, PersistentCompilerState(..), TyThing(..), lookupType, )
import FastString
+import DATA_IOREF ( readIORef )
\end{code}
%************************************************************************
%* *
%************************************************************************
-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, [FastString], [CoreBndr]))
-
-deSugar dflags pcs hst mod_name unqual
- (TcResults {tc_env = type_env,
- tc_binds = all_binds,
- tc_insts = insts,
- tc_rules = rules,
- 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
-
- 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
+ mod_guts = ModGuts {
+ mg_module = mod,
+ mg_exports = exports,
+ 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 (loc,sdoc) = (loc, 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'
-- Display any warnings
; doIfSet (not (isEmptyBag ds_warns))
- (printErrs unqual (pprBagOfWarnings ds_warns))
+ (printErrs (pprBagOfWarnings ds_warns))
-- Dump output
; dumpIfSet_dyn dflags Opt_D_dump_ds "Desugared" (pprCoreExpr core_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
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
pprIdRules rules
\end{code}
-Simplest thing in the world, desugaring External Core:
-
-\begin{code}
-deSugarCore :: (TypeEnv, [TypecheckedCoreBind], [TypecheckedRuleDecl])
- -> IO (ModDetails, (SDoc, SDoc, [FastString], [CoreBndr]))
-deSugarCore (type_env, pairs, rules)
- = return (mod_details, no_foreign_stuff)
- where
- mod_details = ModDetails { md_types = type_env
- , md_insts = []
- , md_rules = ds_rules
- , md_binds = ds_binds }
- ds_binds = [Rec pairs]
- ds_rules = [(fun,rule) | IfaceRuleOut fun rule <- rules]
-
- no_foreign_stuff = (empty,empty,[],[])
-\end{code}
%************************************************************************
projects / ghc-hetmet.git / blobdiff