Description

As I described in #1482 (comment),

I found that the generated ruby-client for OpenAPI 2.0 has a syntax-error.

> Regexp.new(/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$)
Traceback (most recent call last):
        1: from /Users/meganemura/.rbenv/versions/2.5.3/bin/irb:11:in `<main>'
SyntaxError ((irb):1: premature end of char-class: /^(?:[A-Za-z0-9+/)
(irb):1: syntax error, unexpected ']', expecting ')'
Regexp.new(/^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A...

We want to treat regex properly in the following pattern (from #1392):

In OpenAPI v3 file: pattern: '^\d{10}$'
Generated validation code: Regexp.new(/^\\d{10}$/)
Should be: Regexp.new(/^\d{10}$/)

So, the fix of #1393 adds slash(es) to the strings, but didn't work when the pattern contains / like this situation.

openapi-generator version

OpenAPI declaration file content or url

Command line used for generation

Steps to reproduce

Related issues/PRs

• Regex param validation not working as expected in Ruby-Client #1392
• Fix regex generated in Ruby client #1393

/cc @ggershoni

Suggest a fix/enhancement

Let me think about it.