Make the LiberateCase transformation understand associated types

[ghc-hetmet.git] / compiler / main / HscTypes.lhs

diff --git a/compiler/main/HscTypes.lhs b/compiler/main/HscTypes.lhs
index 4dc7894..2b8f8f7 100644 (file)
--- a/compiler/main/HscTypes.lhs
+++ b/compiler/main/HscTypes.lhs
@@ -51,7 +51,7 @@ module HscTypes (
        GenAvailInfo(..), AvailInfo, RdrAvailInfo, 
        IfaceExport,
 
-       Deprecations, DeprecTxt, lookupDeprec, plusDeprecs,
+       Deprecations, DeprecTxt, plusDeprecs,
 
        PackageInstEnv, PackageRuleBase,
 
@@ -64,6 +64,7 @@ module HscTypes (
 
 #include "HsVersions.h"
 
+import Breakpoints      ( SiteNumber, Coord, noDbgSites )
 #ifdef GHCI
 import ByteCodeAsm     ( CompiledByteCode )
 #endif
@@ -97,7 +98,7 @@ import BasicTypes     ( Version, initialVersion, IPName,
 import IfaceSyn
 import FiniteMap       ( FiniteMap )
 import CoreSyn         ( CoreRule )
-import Maybes          ( orElse, expectJust )
+import Maybes          ( orElse, expectJust, catMaybes, seqMaybe )
 import Outputable
 import SrcLoc          ( SrcSpan, Located )
 import UniqFM          ( lookupUFM, eltsUFM, emptyUFM )
@@ -105,7 +106,6 @@ import UniqSupply   ( UniqSupply )
 import FastString      ( FastString )
 
 import StringBuffer    ( StringBuffer )
-import Maybes           ( catMaybes, seqMaybe )
 
 import System.Time     ( ClockTime )
 import Data.IORef      ( IORef, readIORef )
@@ -210,9 +210,15 @@ data TargetId
 pprTarget :: Target -> SDoc
 pprTarget (Target id _) = pprTargetId id
 
+instance Outputable Target where
+    ppr = pprTarget
+
 pprTargetId (TargetModule m) = ppr m
 pprTargetId (TargetFile f _) = text f
 
+instance Outputable TargetId where
+    ppr = pprTargetId
+
 type HomePackageTable  = ModuleNameEnv HomeModInfo
        -- Domain = modules in the home package
        -- "home" package name cached here for convenience
@@ -296,12 +302,15 @@ hptRules hsc_env deps
     , mod /= moduleName gHC_PRIM
 
        -- Look it up in the HPT
-    , let mod_info = case lookupUFM hpt mod of
-                       Nothing -> pprPanic "hptRules" (ppr mod <+> ppr deps)
-                       Just x  -> x
+    , let rules = case lookupUFM hpt mod of
+                   Just info -> md_rules (hm_details info)
+                   Nothing -> pprTrace "WARNING in hptRules" msg [] 
+         msg = vcat [ptext SLIT("missing module") <+> ppr mod,
+                     ptext SLIT("Probable cause: out-of-date interface files")]
+                       -- This really shouldn't happen, but see Trac #962
 
        -- And get its dfuns
-    , rule <- md_rules (hm_details mod_info) ]
+    , rule <- rules ]
 \end{code}
 
 %************************************************************************
@@ -446,14 +455,16 @@ data ModDetails
         md_types     :: !TypeEnv,
         md_insts     :: ![Instance],   -- Dfun-ids for the instances in this module
         md_fam_insts :: ![FamInst],
-        md_rules     :: ![CoreRule]    -- Domain may include Ids from other modules
+        md_rules     :: ![CoreRule],   -- Domain may include Ids from other modules
+        md_dbg_sites     :: ![(SiteNumber, Coord)]     -- Breakpoint sites inserted by the renamer
      }
 
 emptyModDetails = ModDetails { md_types = emptyTypeEnv,
                               md_exports = [],
                               md_insts     = [],
                               md_rules     = [],
-                              md_fam_insts = [] }
+                              md_fam_insts = [],
+                               md_dbg_sites = noDbgSites}
 
 -- A ModGuts is carried through the compiler, accumulating stuff as it goes
 -- There is only one ModGuts at any time, the one for the module
@@ -474,7 +485,10 @@ data ModGuts
         mg_rdr_env   :: !GlobalRdrEnv,  -- Top-level lexical environment
        mg_fix_env   :: !FixityEnv,      -- Fixity env, for things declared in
                                         --   this module 
-       mg_deprecs   :: !Deprecations,   -- Deprecations declared in the module
+
+       mg_fam_inst_env :: FamInstEnv,   -- Type-family instance enviroment
+                                        -- for *home-package* modules (including
+                                        -- this one).  c.f. tcg_fam_inst_env
 
        mg_types     :: !TypeEnv,
        mg_insts     :: ![Instance],     -- Instances 
@@ -482,7 +496,9 @@ data ModGuts
         mg_rules     :: ![CoreRule],    -- Rules from this module
        mg_binds     :: ![CoreBind],     -- Bindings for this module
        mg_foreign   :: !ForeignStubs,
-       mg_hpc_info  :: !HpcInfo         -- info about coverage tick boxes
+       mg_deprecs   :: !Deprecations,   -- Deprecations declared in the module
+       mg_hpc_info  :: !HpcInfo,        -- info about coverage tick boxes
+        mg_dbg_sites :: ![(SiteNumber, Coord)]     -- Bkpts inserted by the renamer
     }
 
 -- The ModGuts takes on several slightly different forms:
@@ -807,13 +823,6 @@ mkIfaceDepCache (DeprecSome pairs) = lookupOccEnv (mkOccEnv pairs) . nameOccName
 emptyIfaceDepCache :: Name -> Maybe DeprecTxt
 emptyIfaceDepCache n = Nothing
 
-lookupDeprec :: Deprecations -> Name -> Maybe DeprecTxt
-lookupDeprec NoDeprecs        name = Nothing
-lookupDeprec (DeprecAll  txt) name = Just txt
-lookupDeprec (DeprecSome env) name = case lookupNameEnv env name of
-                                           Just (_, txt) -> Just txt
-                                           Nothing       -> Nothing
-
 plusDeprecs :: Deprecations -> Deprecations -> Deprecations
 plusDeprecs d NoDeprecs = d
 plusDeprecs NoDeprecs d = d