regex deconstructor

[Mike Kerner]

Does anyone know of a regex deconstructor?  I've looked but haven't found
one.
I've found lots of evaluators and ones that will throw sample text at a
regex but not one that breaks one down and sort-of explains what it does.

Similarly, going the other way, a regex builder would also be nice, but I
can't seem to find one of those, either

-- 
On the first day, God created the heavens and the Earth
On the second day, God created the oceans.
On the third day, God put the animals on hold for a few hours,
   and did a little diving.
And God said, "This is good."