EBNF - Allow accentuated or Unicode char on EBNF meta-identifier or rule name.

Question

Hello PlantUML team,

• Could you allow accentuated or Unicode char on EBNF meta-identifier or rule name?

Here is an example:

@startebnf
(* Test of accentuated or Unicode char*)
alt = été | hiver;
hiver = 'froid';
été = 'chaud';
@endebnf

It is OK on definition part:

But not on meta-identifier or rule name:

Thanks for the enhancement.
Regards.

Answer 1

Fixed by EBNF better unicode support on V1.2024.8

Thank to PlantUML team.

Answer 2

Technically I think ebnf only requires A-Z|a-z but... I agree this should be allowed.

Comments

Instead of doing [A-Za-z] try \p{L} in the regex to allow any letter character

Otherwise https://docs.oracle.com/en/java/javase/12/docs/api/java.base/java/lang/Character.html#isLetter(int)