import BasicTypes
import Panic
import FastString
+import Data.Typeable (cast)
+import Exception
import qualified Language.Haskell.TH as TH
-- THSyntax gives access to internal functions and data types
import qualified Language.Haskell.TH.Syntax as TH
import GHC.Exts ( unsafeCoerce#, Int#, Int(..) )
-import qualified Control.Exception as Exception( userErrors )
+#if __GLASGOW_HASKELL__ < 609
+import qualified Exception ( userErrors )
+#else
+import System.IO.Error
+#endif
\end{code}
Note [Template Haskell levels]
%************************************************************************
\begin{code}
+tcBracket :: HsBracket Name -> BoxyRhoType -> TcM (LHsExpr TcId)
tcSpliceDecls :: LHsExpr Name -> TcM [LHsDecl RdrName]
tcSpliceExpr :: HsSplice Name -> BoxyRhoType -> TcM (HsExpr TcId)
kcSpliceType :: HsSplice Name -> TcM (HsType Name, TcKind)
runQuasiQuotePat :: HsQuasiQuote Name -> TcM (LPat RdrName)
#ifndef GHCI
-tcSpliceExpr _ e _ = pprPanic "Cant do tcSpliceExpr without GHCi" (ppr e)
-tcSpliceDecls e = pprPanic "Cant do tcSpliceDecls without GHCi" (ppr e)
+tcBracket x _ = pprPanic "Cant do tcBracket without GHCi" (ppr x)
+tcSpliceExpr e = pprPanic "Cant do tcSpliceExpr without GHCi" (ppr e)
+tcSpliceDecls x = pprPanic "Cant do tcSpliceDecls without GHCi" (ppr x)
+kcSpliceType x = pprPanic "Cant do kcSpliceType without GHCi" (ppr x)
runQuasiQuoteExpr q = pprPanic "Cant do runQuasiQuoteExpr without GHCi" (ppr q)
runQuasiQuotePat q = pprPanic "Cant do runQuasiQuotePat without GHCi" (ppr q)
; return (ConE "Data.Maybe.Just" s7) }
\begin{code}
-tcBracket :: HsBracket Name -> BoxyRhoType -> TcM (LHsExpr TcId)
tcBracket brack res_ty = do
level <- getStage
case bracketOK level of {
; case either_tval of
Right v -> return v
+#if __GLASGOW_HASKELL__ < 609
Left exn | Just s <- Exception.userErrors exn
, s == "IOEnv failure"
-> failM -- Error already in Tc monad
| otherwise -> failWithTc (mk_msg "run" exn) -- Exception
+#else
+ Left (SomeException exn) ->
+ case cast exn of
+ Just (ErrorCall "IOEnv failure") ->
+ failM -- Error already in Tc monad
+ _ ->
+ case cast exn of
+ Just ioe
+ | isUserError ioe &&
+ (ioeGetErrorString ioe == "IOEnv failure") ->
+ failM -- Error already in Tc monad
+ _ -> failWithTc (mk_msg "run" exn) -- Exception
+#endif
}}}
where
mk_msg s exn = vcat [text "Exception when trying to" <+> text s <+> text "compile-time code:",