In syntax-parse patterns, the notation (A-pattern . S-pattern) is equivalent to (~and A-pattern S-pattern). That’s why you can write, for example, (x ~! y z) instead of having to write (x . (~and ~! (y z)) or ((~and x ~!) y z).

Ah, I see. Thanks again :slightly_smiling_face:

Finally got around to watching the racketcon talks and thanks @samth for the shoutout about the racket docker images :grin: it was very appreciated

How do I compile racket to have futures-enabled? returning #t?

I must have had [on my mac] pict-abbrevs already because I just retried on my mac what I did yesterday on win10 and it worked fine.

If you’re on AArch64, you’ll need to configure with --enable-csdefault to build Racket CS, and then futures should be enabled. Racket BC does not support futures on AArch64.

@ben do you want to update the readme to add raco pkg install pict-abbrevs ?

Ok I’ll try

no need, I updated the readme yesterday (the template has pict-abbrevs as a dependency)

@gknauth were you able to see the slides on mac? I don’t think pict-abbrevs has anything to do with the windows problem, because raco new seems to just make a clone

My threads were getting killed when the response handler’s thread ended, so I created a separate custodian and used that custodian when creating my own threads w/in a response handler: https://github.com/lojic/RacketCon2020/blob/cecc8b3ac5f7b759ce759576678436d5b346a09c/TodoApp/axio/example-axio-env.rkt#L36

https://github.com/lojic/RacketCon2020/blob/master/TodoApp/axio/axio-worker.rkt

@ben TL;DR Yes. Detail: gknauth@merlin% raco pkg install from-template gknauth@merlin% raco new ppict-slideshow-template . gknauth@merlin% slideshow <http://main.ss\|main.ss> standard-module-name-resolver: collection not found for module path: ppict/2 collection: "ppict" ... gknauth@merlin% raco pkg install ppict gknauth@merlin% slideshow <http://main.ss\|main.ss> standard-module-name-resolver: collection not found for module path: pict-abbrevs collection: "pict-abbrevs" ... gknauth@merlin% raco pkg install pict-abbrevs ... The following uninstalled packages are listed as dependencies of pict-abbrevs: lang-file ... Would you like to install these dependencies? [Y/n/a/c/?] Y The following uninstalled packages are listed as dependencies of lang-file: lang-file-lib Would you like to install these dependencies? [Y/n/a/c/?] Y ... gknauth@merlin% slideshow <http://main.ss\|main.ss> ;; happy happy joy joy

@greg, racket-mode is running fine on GNU Emacs 24.3.1. I installed it manually, but it doesn’t seem to blow any error in the few things I’ve tried. I tried C-c C-z, C-c C-k, C-c C-t. Macro-expansion works, but only a first expansion is shown — the output gets printed in the REPL. The stepper doesn’t show the diff-comparisons. I suppose you designed it that way. Thanks for making the best of the 24-version.) CheckSyntax works.

@anything It’s weird timing you mention this because I am literally now working on updating the visit-definition stuff to use the xref backend API introduced in Emacs 25.1.

It has the concept of multiple xref “backends”.

I’d like to respect a configuration where, if say racket-xp-mode cannot find a definition or reference, some other backend (e.g. etags or ggtags or dumbjump) gets to try.

Not sure yet if I’ll end up wanting to merge that.

But in general beware Racket Mode officially only supports 25.1 or newer, and the CI test are only run for that not 24.3.

I’m pretty sure some things already don’t work well or at all < 25.1, I just don’t recall of the top of my head what.

Having said all that if you need to use 24.3.1 I’m glad it’s mostly working well-enough for you, so far!

Hi there! The timing is random! I decided to try today totally unaware of anything you have been doing. (Sorry if I missed any relevant events. Didn’t mean to be rude!) I have a GNU emacs 24 going on for various years and various reasons keep me from upgrading it. I reported just to share the facts. I didn’t mean to influence you in anything. Thanks for the marvelous work! I think the state of racket-mode in GNU Emacs 24.3.1 will probably let me stick with it for many more years. I have made an attempt to upgrade to GNU Emacs 27 and if I spend more time on it, I can probably make it — but in practice I do everything very slowly. (I’ll need to figure some stuff out in order to move on off of 24.3.1.) (I haven’t been using racket-mode in long while. I tried it a long while ago just to try but kept on using Geiser daily. The current features of racket-mode now are an irresistible proposition, so I tried again and was very happy — even though I knew 24 was not supported.)