Use `~@` (sine Racket 7.0): (syntax-parse #'(1 2 2 a 2 2 b 2 c) [(1 (~seq n:nat ...+ x) ...) #'((~@ n ... x) ...)])
-Philip On Sat, Sep 21, 2019 at 4:15 PM Jonathan Simpson <[email protected]> wrote: > Given this macro that I'm experimenting with: > > (syntax-parse #'(1 2 2 a 2 2 b 2 c) [(1 (~seq n:nat ...+ x) ...) #'((n ... > x) ...)]) > > How would I change it so that it returns #'(2 2 a 2 2 b 2 c) instead of > #'((2 2 a) (2 2 b) (2 c)) ? > > I don't want the parens around the individual sequences that I'm matching, > but I haven't figured out a way to do this without using a pattern that > forces me to add them in the body of the syntax-parse clause. How can I > group the n and x pattern variables in the body without adding parens > around them? > > If could get a syntax class that replaces the (~seq n:nat ...+ x) that > might work but I haven't been able to get a syntax class that will do that > either. > > Thanks, > Jonathan > > -- > 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 [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/racket-users/55b38c69-a789-4528-be79-0bf48c97f283%40googlegroups.com > <https://groups.google.com/d/msgid/racket-users/55b38c69-a789-4528-be79-0bf48c97f283%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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 [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/racket-users/CAH3z3gbJiV8usq3_cfWywdXzyLQPN6xvVTrcb5pJJVKZKpKe2g%40mail.gmail.com.
