Full documentation for regex syntax?

[chrisjj]

Can anyone direct me to the full documentation for the regex syntax? e.g. as provided by the engine Mp3tag uses.

I've seen https://docs.mp3tag.de/actions/replace-regexp but it omits e.g. mode modifiers, such as:

Filter expressions

Case sensitive filter:
title MATCHES (?-i)regex

Thanks.

[DetlevD]

@chrisjj

Can anyone direct me to the full documentation for the regex syntax? e.g. as provided by the engine Mp3tag uses. ...

Search the internet for "Boost.Regex".

DD.20140121.1752.CET

[chrisjj]

Thanks D. Has there been an official statement that Mp3tag regex syntax is the same as Boost.Regex's?

[chrisjj]

FTR, this error

suggests the syntax is Perl.

So if the engine is Boost, the regexp syntax documentation is this.