Migrate name style rules to regex

[IEncinas10]

There are several "name style rules" and one more being developed (#1983) which have their rules hardcoded or with small configuration capabilities.

In the past, this motivated a PR that eventually didn't land but did the same thing (using std::regex which seemed to be the problem). The topic was raised again in #2017.

This is a "macro issue" to track the conversion of the existing rules to be regex-based (using re2). I'll keep this in mind and work on it on spare time, I don't know if I'll tackle this on a per-rule bases or I'll group various rules on the same PR.

• constraint_name_style
• enum_name_style
• interface_name_style
• macro_name_style
• parameter_name_style
• parameter_type_name_style
• signal_name_style
• struct_union_name_style
• port_name_suffix
• ¿dff_name_style? (if it lands)

If anyone comes by this issue and wants to help feel free to do so 😃

[sconwayaus]

Can you add port_name_suffix to the list too. It's basically the same (checks style (snake_case) with some prefixes), and needs some configuration. Regex looks like a good answer.

Happy to with this one too.

[IEncinas10]

Missed this one, thanks!

[sconwayaus]

Happy to help out with any of these rules too.

I've already been playing with the port_name_suffix rule before I saw this issue, and added configuration to it. Just need to convert this over to regex (add tests, etc...).

[burnfield]

Would be awesome. This has been implemented in svlint, if you're looking for inspiration.