import HscTypes
import FamInstEnv
+import LoadIface
import TcMType
import TcRnMonad
import TyCon
; (eps, hpt) <- getEpsAndHpt
; let { -- Fetch the iface of a given module. Must succeed as
- -- all imported modules must already have been loaded.
+ -- all directly imported modules must already have been loaded.
modIface mod =
case lookupIfaceByModule dflags hpt (eps_PIT eps) mod of
Nothing -> panic "FamInst.checkFamInstConsistency"
Just iface -> iface
; hmiModule = mi_module . hm_iface
- ; hmiFamInstEnv = mkFamInstEnv . md_fam_insts . hm_details
- ; mkFamInstEnv = extendFamInstEnvList emptyFamInstEnv
- ; hptModInsts = [ (hmiModule hmi, hmiFamInstEnv hmi)
- | hmi <- eltsUFM hpt]
- ; modInstsEnv = eps_mod_fam_inst_env eps -- external modules
- `extendModuleEnvList` -- plus
- hptModInsts -- home package modules
+ ; hmiFamInstEnv = extendFamInstEnvList emptyFamInstEnv
+ . md_fam_insts . hm_details
+ ; hpt_fam_insts = mkModuleEnv [ (hmiModule hmi, hmiFamInstEnv hmi)
+ | hmi <- eltsUFM hpt]
; groups = map (dep_finsts . mi_deps . modIface)
directlyImpMods
; okPairs = listToSet $ concatMap allPairs groups
-- the difference gives us the pairs we need to check now
}
- ; mapM_ (check modInstsEnv) toCheckPairs
+ ; mapM_ (check hpt_fam_insts) toCheckPairs
}
where
allPairs [] = []
allPairs (m:ms) = map (ModulePair m) ms ++ allPairs ms
- -- The modules are guaranteed to be in the environment, as they are either
- -- already loaded in the EPS or they are in the HPT.
- --
- check modInstsEnv (ModulePair m1 m2)
- = let { instEnv1 = (expectJust "checkFamInstConsistency") . lookupModuleEnv modInstsEnv $ m1
- ; instEnv2 = (expectJust "checkFamInstConsistency") . lookupModuleEnv modInstsEnv $ m2
- ; insts1 = famInstEnvElts instEnv1
- }
- in
- mapM_ (checkForConflicts (emptyFamInstEnv, instEnv2)) insts1
+ check hpt_fam_insts (ModulePair m1 m2)
+ = do { env1 <- getFamInsts hpt_fam_insts m1
+ ; env2 <- getFamInsts hpt_fam_insts m2
+ ; mapM_ (checkForConflicts (emptyFamInstEnv, env2))
+ (famInstEnvElts env1) }
+
+getFamInsts :: ModuleEnv FamInstEnv -> Module -> TcM FamInstEnv
+getFamInsts hpt_fam_insts mod
+ | Just env <- lookupModuleEnv hpt_fam_insts mod = return env
+ | otherwise = do { _ <- initIfaceTcRn (loadSysInterface doc mod)
+ ; eps <- getEps
+ ; return (expectJust "checkFamInstConsistency" $
+ lookupModuleEnv (eps_mod_fam_inst_env eps) mod) }
+ where
+ doc = ppr mod <+> ptext (sLit "is a family-instance module")
\end{code}
%************************************************************************