Please let me add the nested-regex-approach. I wouldn't call this a
solution but just an approach. No one understand that regex it is
nearly unmaintainable.
I hope for a more elegant solution.
This matches if we have code in verbatim
^|[ .,;:\-?!({\"']=.*?(?:^|[ .,;:\-?!({\"']~.*?~[.,;:\-?!)}\"']|$).*?=[
.,;:\-?!)}\"']|$
This matches if we have verbatim in code
(?:^|[ .,;:\-?!({\"']~.*?(?:^|[ .,;:\-?!({\"']=.*?=[.,;:\-?!)}\"']|$).*?~[
.,;:\-?!)}\"']|$)
If one of this matching I now which one of my "usual" regex pattern using
catching groups to extract the content I should use first.
Just for testing (maybe on regex101.com) here is the text I used.
This =is ~code~ in verbatim= text.
This =is usual verbatim= text.
This ~is =verbatim= in code~ text.
This ~is usual code~ text.
