On Fri, Jun 3, 2011 at 11:04 PM, Eli Barzilay <e...@barzilay.org> wrote: > Four minutes ago, Rodolfo Carvalho wrote: >> On Fri, Jun 3, 2011 at 23:49, Carl Eastlund <c...@ccs.neu.edu> wrote: >> > The origin of #px is "Perl-compatible regular expression", while >> > #rx are compatible with command-line tools such as egrep. >> >> It seems that it's not yet documented. Good to know, now I can >> choose between Perl and power :D > > See the top of http://docs.racket-lang.org/reference/regexp.html -- > it shows the basic shared syntax, and then there's > > The following completes the grammar for regexp, which treats { and } > as literals, \ as a literal within ranges, and \ as a literal > producer outside of ranges. > > and a bit later > > The following completes the grammar for pregexp, which uses { and } > bounded repetition and uses \ for meta-characters both inside and > outside of ranges. > > These blurbls summarize the difference, and the tables that follow > them specifies the syntax formally.
I believe he means that the p in #px is not explicitly documented as referring to the P in Perl. --Carl _________________________________________________ For list-related administrative tasks: http://lists.racket-lang.org/listinfo/users
