Unnecessary escaping of otherwise special characters in square brackets

[JohelEGP]

According to http://www.pcre.org/current/doc/html/pcre2pattern.html#SEC9, between [ and ]:

• You don't need to escape ^ for it to be considered literally if its not after the [, where it has a special meaning.
• Similarly, you need to escape - for it to considered literally even if it's in a place where it unambiguously can't be used to define a range.

See example: https://godbolt.org/z/8v6cu7. It seems that you also need to escape |, even though it has no special meaning anywhere between square brackets.

The only metacharacters that are recognized in character classes are backslash, hyphen (only where it can be interpreted as specifying a range), circumflex (only at the start), opening square bracket (only when it can be interpreted as introducing a POSIX class name, or for a special compatibility feature - see the next two sections), and the terminating closing square bracket. However, escaping other non-alphanumeric characters does no harm.

[hanickadot]

Should be fixed now.

[hanickadot]

Thank you for reporting the issue.

[JohelEGP]

Thank you.

[JohelEGP]

Seems like it's not working: https://godbolt.org/z/CQEJMI

[hanickadot]

I removed the special case allowing [-] and [-something], currently the LL1 grammar is designed in a way which doesn't allow to fixing this, to avoid further confusion, this is no longer supported, maybe in future with a big refactoring of the grammar or parser I will revisit this.

[hanickadot]

I tried it, but unsuccessfully.