The reason it's not a tail call is because match-cond creates its own dynamic scope to allow the outputs to be read. If it's possible, maybe this should be changed to static scope, though I'm not sure how that could work exactly. If static scope were used, it would be possible to make it a tail call. For your specific example, it would be more idiomatic in Factor to replace the entire match-cond with the word first2 to get the elements at the 0 and 1 positions out of the array.
Daniel Ehrenberg > Uh-oh, I wasn't aware of this. However, in this case using match-cond in > servers (in the sense of the concurrency module), as the docs' examples > suggest, seems to be not a wise choice. (Even if it neatly resembles > Erlang style server processes.) Or maybe match-cond should be altered so > that the matching quotation is tail called? > > Csaba ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ Factor-talk mailing list Factor-talk@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/factor-talk
