exporting functions which raise exceptions

Suppose I foreign export (or wrap) a Haskell function and that function raises an exception, calls exit or raises an error. How should this be reflected on the C side? In a batch-mode system (ghc, runhugs, nhc), we need to call a no_return function like exit but should it always be exit or should there be a way for an application to register an alternative function? (e.g., If my Basic interpreter makes a foreign function call into Haskell, I'd like an error in Haskell to bring me back to the Basic REPL not to quit my program). In an interactive system (ghci, Hugs), the right thing to do seems to be to return to the interpreters REPL. -- Alastair Reid reid@cs.utah.edu http://www.cs.utah.edu/~reid/