[racket-dev] Release for v6.0 is about to begin

Okay, I've extended the readtable.
At-exp is preferable, and I do use at-exps in other circumstances.
Thank you, Greg.


On Wed, Nov 6, 2013 at 5:40 AM, Greg Hendershott
<greghendershott at gmail.com>wrote:

> 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} "foo at bar.com")
>
>
> On Mon, Nov 4, 2013 at 8:40 PM, WarGrey Gyoudmon Ju
> <juzhenliang at gmail.com> 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 <ryanc at ccs.neu.edu>
> 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:
> >>  http://lists.racket-lang.org/dev
> >
> >
> >
> > _________________________
> >   Racket Developers list:
> >   http://lists.racket-lang.org/dev
> >
>
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