<div dir="ltr"><div><div>Okay, I've extended the readtable. </div>At-exp is preferable, and I do use at-exps in other circumstances. </div>Thank you, Greg. </div><div class="gmail_extra"> <div class="gmail_quote"> On Wed, Nov 6, 2013 at 5:40 AM, Greg Hendershott <<a href="mailto:greghendershott@gmail.com" target="_blank">greghendershott@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Well, I think Ryan is talking about people who are coding a new feature that's nearly ready. Not soliciting ideas for last-minute ideas to try to rush into v6. Nice try, though. :) Having said that, have you tried using at-exps for this? I've only thought about this for a few minutes, and there are pros and cons, but: - - - - - - - #lang at-exp racket ;; ^^^^^^ ;; Don't like regexps in quotes? (regexp-match #px"^foo" "foo") ;; Do this instead: (regexp-match @pregexp{^foo} "foo") ;; OK, but: ;; 1. A bit verbose. ;; 2. Those aren't precompiled regexps, like with #px ;; 3. Also if the {} spans multiple lines, it needs to be converted ;; into just one string. ;; So: (define px (compose1 pregexp ~a)) (define rx (compose1 regexp ~a)) ;; Now you can write this: (regexp-match @px{^foo} "foo") ;; Ta da !! ;; You can include newlines without using \n (regexp-match @px{^foo bar} "foo\nbar") ;; But bad news, you can't use \n anymore. ;; (regexp-match @px{^foo[\n]bar} "foo\nbar") ;; => regexp: illegal alphabetic escape ;; The other way is to @ quote: @~a{@#\newline} @~a{@"\n"} (regexp-match @px{^foo@"\n"bar} "foo\nbar") ;; OTOH, good news is that regexp backslashes can be used as-is -- no ;; need for the extra \ (regexp-match @px{1\.0} "1.0") ;; p.s. How to escape @ in an at-exp? @"@" (regexp-match @rx{^foo@"@"bar\.com} "<a href="mailto:foo@bar.com">foo@bar.com</a>") <div class="HOEnZb"><div class="h5"> On Mon, Nov 4, 2013 at 8:40 PM, WarGrey Gyoudmon Ju <<a href="mailto:juzhenliang@gmail.com">juzhenliang@gmail.com</a>> wrote: > Could you please make the regular expression syntax more elegant? > To replace the "" with // or any other character as its boundary. > > Here is the example: > #px/^\s*\/([^\/])\/\s*$/ === #px@^\s*/([^/])/\s*$@ === > #px"^\\s*/([^/])/\\s*$" > > Thank you in advance. > > > On Tue, Nov 5, 2013 at 12:51 AM, Ryan Culpepper <<a href="mailto:ryanc@ccs.neu.edu">ryanc@ccs.neu.edu</a>> wrote: >> >> The release process for v6.0 will begin in about a week. If >> you have any new features that you want in and are relatively close >> to being done, now is a good time to do that. >> _________________________ >> Racket Developers list: >> <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a> > > > > _________________________ > Racket Developers list: > <a href="http://lists.racket-lang.org/dev" target="_blank">http://lists.racket-lang.org/dev</a> > </div></div></blockquote></div> </div>