On Mon, Oct 11, 2010 at 02:51, Peter Bex <peter....@xs4all.nl> wrote: > On Mon, Oct 11, 2010 at 01:17:49PM +0900, Alex Shinn wrote:
> However, in case of substring and index operations, the result is > always an integer/a string. Returning #f is completely unambiguous > in those cases, so I don't see the need to add yet another procedure. > > It would be preferable to have this behaviour: > > (irregex-match-substring <m> <invalid-i>) => error > (irregex-match-substring <m> <unmatched-i>) => #f > > (irregex-match-start-index <m> <invalid-i>) => error > (irregex-match-start-index <m> <unmatched-i>) => #f I agree with Peter, the /default procedures seem like a needless abstraction as a totally unambiguous #f is common practice. For example, srfi-13 string-index. Unless this practice is going to be deprecated somehow by R7RS. _______________________________________________ Chicken-users mailing list Chicken-users@nongnu.org http://lists.nongnu.org/mailman/listinfo/chicken-users
