string literals that match a regexp

specifically, I want to match on identifiers that contain the / character

Identifier is like abc in (define abc 1) and string literal is like "def" in (displayln "def"). So do you want to match against for/list or "4 / 2 = 2"?

#lang racket (require syntax/parse/define) (begin-for-syntax (define-syntax-class my-class (pattern x:id ; match against an id #:do [; this is x as a symbol (define as-symbol (syntax-e #'x)) ; this is x as a string (define as-string (symbol->string as-symbol))] #:fail-unless (regexp-match #px"./." as-string) "must have / in the middle of an identifier name"))) (define-syntax-parser test [(_ x:my-class) #''yes] [_ #''no]) (test hello/world) ;=> yes (test hello/world/) ;=> yes (test hello/) ;=> no (test hello) ;=> no (test /hello) ;=> no

ah that’s perfect, thank you!

i wanted to match against for/list which this does

do you guys know if ben greemans transiently typed racket is going to ship ? https://youtu.be/uAWcdD40hiI

@ben definitely plans to

https://github.com/racket/typed-racket/pull/948 looks like WIP

integrating back into the main repo is surely a different kind of task

seems like he had a newborn according to his youtbe channel, so his hands are probably tied, also congratz btw