X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnMonad.lhs;h=ed1dce663a7a69ec3c69fd3928fec89fd501a701;hb=2eb105009654588b2130997509645841800681b9;hp=f118f47ab523785dca713f1e3f78457a5da264e9;hpb=3f1b316d7035c55cd712cd39a9981339bcef2e8c;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcRnMonad.lhs b/compiler/typecheck/TcRnMonad.lhs
index f118f47..ed1dce6 100644
--- a/compiler/typecheck/TcRnMonad.lhs
+++ b/compiler/typecheck/TcRnMonad.lhs
@@ -397,6 +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) }
 
@@ -561,6 +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