The %% is just for the sake of illustration.
I came up with the idea of using regex expressions for highlighting from other highlighters.
In the case of highlighting javascript these are:
[1] https://github.com/pygments/pygments/blob/master/pygments/lexers/javascript.py
[2] https://github.com/speed-highlight/core/blob/main/src/languages/js.js
and several others.
To highlight javascript regex literals, /…/ one can, for example use (from [1]):
\/((?!\/)[^\r\n\\]|\\.)+\/[dgimsuy]*
And to highlight template literals ‵…‵
‵(?:(?!‵|${).)*?(?:‵|\${)
}(?:(?!‵|${).)*?(?:‵|\${))
The problem is that these two interfere:
I’ve written several variable length regex based highlighters for Python, Javascript, PowerShell and more. These work well, but only up to the point where they don’t overlap with another variable length regex highlight definition.
I’ll consider adding an option to control how regex is applied in situations like this.
This would be awesome 😃.
I realise that I’m just one customer, so please first focus on what’s most important for EmEditor rather than my request. Should you find the time, then I’ll greatly appreciate the effort.
Thank you, Yutaka!