#racket on 2020-09-17 — irc logs at freenode.irclog.whitequark.org

2020-09-10 10:23 samth changed the topic of #racket to: Racket v7.8 has been released: https://blog.racket-lang.org/2020/08/racket-v7-8.html -- Racket -- https://racket-lang.org -- https://pkgs.racket-lang.org -- Paste at http://pasterack.org

00:05 <countvajhula> ok, I discovered "syntax patterns" which allow you to qualify match patterns in syntax-parse

00:05 <countvajhula> this one specifically: https://docs.racket-lang.org/syntax/stxparse-patterns.html?q=syntax%20patterns#%28form._%28%28lib._syntax%2Fparse..rkt%29._~7eliteral%29%29

00:05 <rudybot> https://teensy.info/LPPW3yRRCU

00:05 <countvajhula> ... causes both versions of the macro to work

00:05 <countvajhula> still not sure why the original version worked at all

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00:26 <phillbush> Hello, is there any environment variable I can set to change the place raco install stuff from ~/.racket to ~/.local/racket for example?

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00:32 <countvajhula> phillbush: not sure, but maybe this? https://docs.racket-lang.org/raco/config-file.html#%28tech._main._collection._directory%29

00:34 <countvajhula> you could try running (find-collects-dir) to see if it matches what you're expecting, as a test

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01:50 <phillbush> countvajhula: thanks, gonna check it out

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04:48 <mirrorbird> hello

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21:00 <emacsen> This may seem like a dumb question, but when an exception is raised, how does racket know the line number it comes from?

21:03 <selimcan> emacsen, the so-called syntax objects store program code along with the source locations

21:03 <selimcan> https://beautifulracket.com/appendix/glossary.html#syntax-object

21:03 <selimcan> I guess exception handler makes use of those srclocs

21:04 <emacsen> selimcan, gotcha. thanks

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21:49 <countvajhula> hi, i'm running into an issue with writing a contract for a case-lambda

21:49 <countvajhula> http://pasterack.org/pastes/14694

21:49 <countvajhula> that code gives an error, but the individual contracts in the case-> work fine on their own

21:50 <countvajhula> i.e. (-> any/c any/c) and (-> any/c ... any/c) are accepted by the interpreter, just not when enclosed inside a case->

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21:51 <countvajhula> i have the impression that case-> can wrap any ordinary contracts - is this not the case?

21:53 <countvajhula> could it be that this is a bug?

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