Is there any programmatic way to take a Regexp like /foo/ and turn it
into an anchored Regexp (/^foo/)? I'm looking for a programmatic way
to do this because the actual Regexp is dynamic, not known until run
time.

I'm wishing for an option or method similar to the EXTENDED,
IGNORECASE, MULTILINE options, except for anchoring.

I suspect the answer will be "no", but I wanted to ask anyway before
giving up hope...

Cheers,
Greg