find regex in backward direction ?

[Виталий Фадеев]

On Sunday, 20 December 2020 at 04:33:21 UTC, Виталий Фадеев wrote:
> On Saturday, 19 December 2020 at 23:16:18 UTC, kdevel wrote:
>> On Saturday, 19 December 2020 at 12:52:54 UTC, Виталий Фадеев 
>> wrote:
> ...

"retro" possible when using simple expression "abc".
For complex "ab\w" or "(?P<name>regex)" should be parsing: [ "a", 
"b", "\w" ],  [ "(", "?", "P", "<name>", "regex", ")"]..., i 
think.

up.