[pmwiki-devel] Question about nested expressions...

[The Editor]

I'm trying to understand how the nesting capabilities work in Pm's new
core markup expressions function and think it has to do with these
main lines...

  $expr = preg_replace('/\\(\\W/e', "Keep(PSS('$2'),'P')", $expr);
  while (preg_match('/\\((\\w+)(\\s[^()]*)?\\)/', $expr, $match)) {
    list($repl, $func, $params) = $match;

But for the life of me it doesn't make too much sense.  Would anyone
be willing to try and interpret this briefly in a little bit more
accessible english?

TIA, a bunch!

Cheers,
Dan