Message, mkLocMessage, printError,
Severity(..),
- ErrMsg, WarnMsg,
+ ErrMsg, WarnMsg, throwErrMsg, handleErrMsg,
errMsgSpans, errMsgContext, errMsgShortDoc, errMsgExtraInfo,
Messages, errorsFound, emptyMessages,
- mkErrMsg, mkWarnMsg, mkPlainErrMsg, mkLongErrMsg,
+ mkErrMsg, mkPlainErrMsg, mkLongErrMsg, mkWarnMsg, mkPlainWarnMsg,
printErrorsAndWarnings, printBagOfErrors, printBagOfWarnings,
handleFlagWarnings,
import Data.Dynamic
import Data.List
import System.IO
+import Exception
-- -----------------------------------------------------------------------------
-- Basic error messages: just render a message with a source location.
-- NB Pretty.Doc not SDoc: we deal with the printing style (in ptic
-- whether to qualify an External Name) at the error occurrence
+#if __GLASGOW_HASKELL__ >= 609
+instance Exception ErrMsg
+#endif
+
+instance Show ErrMsg where
+ show em = showSDoc (errMsgShortDoc em)
+
+throwErrMsg :: ErrMsg -> a
+#if __GLASGOW_HASKELL__ < 609
+throwErrMsg = throwDyn
+#else
+throwErrMsg = throw
+#endif
+
+handleErrMsg :: (ErrMsg -> IO a) -> IO a -> IO a
+#if __GLASGOW_HASKELL__ < 609
+handleErrMsg = flip catchDyn
+#else
+handleErrMsg = handle
+#endif
+
-- So we can throw these things as exceptions
errMsgTc :: TyCon
errMsgTc = mkTyCon "ErrMsg"
mkWarnMsg :: SrcSpan -> PrintUnqualified -> Message -> WarnMsg
mkWarnMsg = mkErrMsg
+-- Variant that doesn't care about qualified/unqualified names
+mkPlainWarnMsg :: SrcSpan -> Message -> ErrMsg
+mkPlainWarnMsg locn msg = mkWarnMsg locn alwaysQualify msg
+
type Messages = (Bag WarnMsg, Bag ErrMsg)
emptyMessages :: Messages
errorsFound :: DynFlags -> Messages -> Bool
-- The dyn-flags are used to see if the user has specified
--- -Werorr, which says that warnings should be fatal
+-- -Werror, which says that warnings should be fatal
errorsFound dflags (warns, errs)
| dopt Opt_WarnIsError dflags = not (isEmptyBag errs) || not (isEmptyBag warns)
| otherwise = not (isEmptyBag errs)