]> On Tue, Oct 14, 2003 at 06:49:11PM -0800, Bhavik Gandhi (hotmail) wrote: > > I am a novice to the OCAML language. I am trying to write a small > program and I am facing with a syntax error, any help will be > appreciated > > let rec undup lst = try match lst with > |[]->[] > |h::tail -> match tail with > |[]->[] > |h::xt -> if (h=List.hd xt) then h::undup xt > else raise(Failure "ERROR-Your list does not contain duplicates");; > > Error: line 6, characters 67-69 > Syntax error. Right, because you have 'try' without 'with'. The syntax is try <desired operations> with <exception pattern> -> <exception handling code> | <exception pattern> -> (* 2nd & further patterns are optional *) <exception handling code> You could make the above example work by adding a 'with' clause at the end, e.g. with Failure -> print_endline "Exception handled."; [] (* exception handler must return same type as main operation *) But that would actually be a little pointless in this case, since as far as I can tell the only possible exception is the Failure raised by your code. So without knowing your objectives in more detail, I would say the most sensible approach would be to simply delete 'try' from this function, and perhaps have a complete try-with block in some other function that is calling this one. -- Matt Gushee When a nation follows the Way, Englewood, Colorado, USA Horses bear manure through mgushee@havenrock.com its fields; http://www.havenrock.com/ When a nation ignores the Way, Horses bear soldiers through its streets. --Lao Tzu (Peter Merel, trans.) ------------------- To unsubscribe, mail caml-list-request@inria.fr Archives: http://caml.inria.fr Bug reports: http://caml.inria.fr/bin/caml-bugs FAQ: http://caml.inria.fr/FAQ/ Beginner's list: http://groups.yahoo.com/group/ocaml_beginners