Rust flavor produces error for valid regex

[gammelalf]

Bug Description

I'm assuming your using rust-lang/regex as your rust library.
(I couldn't find verification in your docs but that's what your code generation uses.)

One of its examples doesn't work on you're page.
(?-u)(?<cstr>[^\x00]+)\x00 taken from its README

Reproduction steps

Enter (?-u)(?<cstr>[^\x00]+)\x00

Expected Outcome

The ability to test strings againts this valid regex.

[firasdib]

You cannot disable unicode in Rust, since that caused a lot of issues. See #1208

If you have a good solution for it, I'd be happy to implement it.

[InSyncWithFoo]

@firasdib I don't know Rust, but it seems that rust-lang/regex accepts both (?P<foo>) and (?<foo>). Currently regex101 only allows the former.

[firasdib]

I get an error with the Rust version running on regex101 - maybe I've compiled an older version?

[InSyncWithFoo]

@firasdib Probably. This snippet (written by ChatGPT) runs just as fine with either (?P<foo>) or (?<foo>).

[InSyncWithFoo]

It seems that this feature was added recently in issue #955 and corresponding PR #956. Oh, and you might want to modify the Go flavor too, since re2 now supports (?<foo>) as well.

[firasdib]

Thank you for the info. I'll try to get to this when I get more time on my hands. Closing in favor of #2167