Re: [racket-users] Pattern Matching
On 9/28/2020 10:50 AM, Beatriz Moreira wrote: Hello, I would like to know how do I match multiple variables to a regular expression. My idea is to match every *f* variables (f...) to an *f* in ((contract C ((T x) ...) ((T f)) ...) ... ). I am trying to implement a core language for smart contracts in Racket, but I need to have as pre condition in my reduction rules that the *f* is a function in one of the contracts. Thank you! :) 'regexp-match*' outputs a list of matched strings, and match has an apply clause: '(app /expr/ pats ...)' which evaluates /expr/ and tries to match the output. My first thought would be to try something like: match ( inp ) : ((app (regexp-match* pattern inp) match1 match2 ... ) ... ) : Caveat ... I've never tried to do this. If match doesn't like this approach (or something close to it), then I would separately perform the regexp-match* and the pattern match on its output list. Hope this helps, George https://docs.racket-lang.org/reference/regexp.html https://docs.racket-lang.org/reference/match.html -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/22de3af2-b64f-73c0-fe12-a832dccf6086%40comcast.net.
[racket-users] Spritely website launches (plus, Goblins + networked programming)
Hello all, First of all, Spritely's website has finally launched: https://spritelyproject.org/ If you're wondering what on earth I've been doing, and where all my work is going, this is a good explaination as any. There's also a video you can see on that page that I gave for a presentation for ActivityPub Conference 2020: https://conf.tube/videos/watch/18aa2f92-36cc-4424-9a4f-6f2de946fbd2 Also, here's a fun easter egg: https://conf.tube/videos/watch/285e7580-8281-4ae4-842e-81c687237c69 But of course, the main thing of interest to most racketeers is Spritely Goblins, the ocap'y actor model'y distributed transactional programming library thingy I've been building in Racket. The most recent release (v0.7) has added the beginings of distributed programming support: https://docs.racket-lang.org/goblins/captp.html However it isn't as easy to use as it could be. More will be coming in v0.8, which is when I can start recommending people start building programs on top of it (and when I think we'll switch from alpha to beta). There is much more to say about Spritely Goblins, and I will be also giving a talk at RacketCon about it, much more focused on the code side than my APConf talk was. (I'm still trying to restructure it based on feedback! Getting close!) So more then. - Chris -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/87k0wd4tr6.fsf%40dustycloud.org.
[racket-users] Pattern Matching
Hello, I would like to know how do I match multiple variables to a regular expression. My idea is to match every *f* variables (f...) to an *f* in ((contract C ((T x) ...) ((T f)) ...) ... ). I am trying to implement a core language for smart contracts in Racket, but I need to have as pre condition in my reduction rules that the *f* is a function in one of the contracts. Thank you! :) https://bitbucket.org/beatrizmoreira/msc/src/master/fwsollast.rkt -- You received this message because you are subscribed to the Google Groups "Racket Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to racket-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/e4bc2e79-c375-4dad-8d49-2f308ad53c19n%40googlegroups.com.
