Thorsten Ottosen wrote:
Thorsten Ottosen skrev:
Hi Eric,
(Apologies in advance for such a stupid question.)
I case it helps, then below is my complete function.
The single most important thing you can do, both to reduce stack space and improve parse times, is to eliminate backtracking where you can with the keep() directive. For instance, in a lot of places you have *space
X, where X cannot match a whitespace character and space is an sregex defined as _s | _ln. Replace it with keep(*_s) or keep(+_s). It'll mean the same thing, use up vastly less stack and be *much* more efficient.
And a tip: when you quantify something simple (e.g., a single char matcher) like +_s it is implemented iteratively. When you quantify something that can match a variable number of characters like +space or +(_s | _ln) it is implemented recursively. HTH, -- Eric Niebler Boost Consulting www.boost-consulting.com