Add quasi-quotation, courtesy of Geoffrey Mainland

[ghc-hetmet.git] / compiler / typecheck / TcRnMonad.lhs

diff --git a/compiler/typecheck/TcRnMonad.lhs b/compiler/typecheck/TcRnMonad.lhs
index dd89498..ed1dce6 100644 (file)
--- a/compiler/typecheck/TcRnMonad.lhs
+++ b/compiler/typecheck/TcRnMonad.lhs
@@ -7,7 +7,7 @@
 -- The above warning supression flag is a temporary kludge.
 -- While working on this module you are encouraged to remove it and fix
 -- any warnings in the module. See
---     http://hackage.haskell.org/trac/ghc/wiki/CodingStyle#Warnings
+--     http://hackage.haskell.org/trac/ghc/wiki/Commentary/CodingStyle#Warnings
 -- for details
 
 module TcRnMonad(
@@ -44,6 +44,7 @@ import Bag
 import Outputable
 import UniqSupply
 import Unique
+import UniqFM
 import DynFlags
 import StaticFlags
 import FastString
@@ -369,7 +370,8 @@ traceOptTcRn flag doc = ifOptM flag $ do
 
 dumpTcRn :: SDoc -> TcRn ()
 dumpTcRn doc = do { rdr_env <- getGlobalRdrEnv ;
-                   ioToTcRn (printForUser stderr (mkPrintUnqualified rdr_env) doc) }
+                    dflags <- getDOpts ;
+                   ioToTcRn (printForUser stderr (mkPrintUnqualified dflags rdr_env) doc) }
 
 dumpOptTcRn :: DynFlag -> SDoc -> TcRn ()
 dumpOptTcRn flag doc = ifOptM flag (dumpTcRn doc)
@@ -395,6 +397,9 @@ tcIsHsBoot = do { env <- getGblEnv; return (isHsBoot (tcg_src env)) }
 getGlobalRdrEnv :: TcRn GlobalRdrEnv
 getGlobalRdrEnv = do { env <- getGblEnv; return (tcg_rdr_env env) }
 
+getRdrEnvs :: TcRn (GlobalRdrEnv, LocalRdrEnv)
+getRdrEnvs = do { (gbl,lcl) <- getEnvs; return (tcg_rdr_env gbl, tcl_rdr lcl) }
+
 getImports :: TcRn ImportAvails
 getImports = do { env <- getGblEnv; return (tcg_imports env) }
 
@@ -475,7 +480,8 @@ addLongErrAt loc msg extra
   = do { traceTc (ptext SLIT("Adding error:") <+> (mkLocMessage loc (msg $$ extra))) ; 
         errs_var <- getErrsVar ;
         rdr_env <- getGlobalRdrEnv ;
-        let { err = mkLongErrMsg loc (mkPrintUnqualified rdr_env) msg extra } ;
+         dflags <- getDOpts ;
+        let { err = mkLongErrMsg loc (mkPrintUnqualified dflags rdr_env) msg extra } ;
         (warns, errs) <- readMutVar errs_var ;
         writeMutVar errs_var (warns, errs `snocBag` err) }
 
@@ -491,7 +497,8 @@ addReportAt :: SrcSpan -> Message -> TcRn ()
 addReportAt loc msg
   = do { errs_var <- getErrsVar ;
         rdr_env <- getGlobalRdrEnv ;
-        let { warn = mkWarnMsg loc (mkPrintUnqualified rdr_env) msg } ;
+         dflags <- getDOpts ;
+        let { warn = mkWarnMsg loc (mkPrintUnqualified dflags rdr_env) msg } ;
         (warns, errs) <- readMutVar errs_var ;
         writeMutVar errs_var (warns `snocBag` warn, errs) }
 
@@ -557,6 +564,19 @@ recoverM recover thing
           Left exn  -> recover
           Right res -> returnM res }
 
+
+-----------------------
+mapAndRecoverM :: (a -> TcRn b) -> [a] -> TcRn [b]
+-- Drop elements of the input that fail, so the result
+-- list can be shorter than the argument list
+mapAndRecoverM f []     = return []
+mapAndRecoverM f (x:xs) = do { mb_r <- tryM (f x)
+                            ; rs <- mapAndRecoverM f xs
+                            ; return (case mb_r of
+                                         Left _  -> rs
+                                         Right r -> r:rs) }
+                       
+
 -----------------------
 tryTc :: TcRn a -> TcRn (Messages, Maybe a)
 -- (tryTc m) executes m, and returns
@@ -871,9 +891,11 @@ setLclTypeEnv lcl_env thing_inside
 recordThUse :: TcM ()
 recordThUse = do { env <- getGblEnv; writeMutVar (tcg_th_used env) True }
 
-keepAliveTc :: Name -> TcM ()          -- Record the name in the keep-alive set
-keepAliveTc n = do { env <- getGblEnv; 
-                  ; updMutVar (tcg_keep env) (`addOneToNameSet` n) }
+keepAliveTc :: Id -> TcM ()    -- Record the name in the keep-alive set
+keepAliveTc id 
+  | isLocalId id = do { env <- getGblEnv; 
+                     ; updMutVar (tcg_keep env) (`addOneToNameSet` idName id) }
+  | otherwise = return ()
 
 keepAliveSetTc :: NameSet -> TcM ()    -- Record the name in the keep-alive set
 keepAliveSetTc ns = do { env <- getGblEnv; 
@@ -913,8 +935,8 @@ setLocalRdrEnv rdr_env thing_inside
 mkIfLclEnv :: Module -> SDoc -> IfLclEnv
 mkIfLclEnv mod loc = IfLclEnv { if_mod     = mod,
                                if_loc     = loc,
-                               if_tv_env  = emptyOccEnv,
-                               if_id_env  = emptyOccEnv }
+                               if_tv_env  = emptyUFM,
+                               if_id_env  = emptyUFM }
 
 initIfaceTcRn :: IfG a -> TcRn a
 initIfaceTcRn thing_inside