Re: improve substr
Jack Woehr <[email protected]>
| Newsgroups | gmane.comp.gnu.m4.general |
|---|---|
| Message-ID | <[email protected]> |
Eric Blake wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > According to Jack Woehr on 12/24/2008 7:14 PM: > >> Eric Blake wrote: >> >>> Again, implementing this natively will be more efficient. What do you >>> think of adding these two enhancements to substr? >>> >>> >> I think anything you want to do is okay as long as it is a perfect >> superset of the existing behavior. m4 goes back to the mid-1970's >> and we shouldn't break existing code. Especially not mine! :) >> > > It's doubtful that any portable m4 scripts were relying on traditional > behavior, Agreed. Certainly not any of mine! > define(`substr', > `ifelse(eval($2 < 0 || $3-0 < 0), 1, `', > `builtin(`substr',$@)')') > You're the wiz! > Don't work too hard, make some time for fun as well! > So why are we both on the computer network tonite? :) -- Jack J. Woehr # Fate lessons of the past and present http://www.well.com/~jax # were now in session. http://www.softwoehr.com # - Steven Wright, _The Beach_ _______________________________________________ m4-discuss mailing list [email protected] http://lists.gnu.org/mailman/listinfo/m4-discuss