[Patch] Whole regex refactoring and current status

[Tim Shen]

On Fri, Aug 9, 2013 at 12:15 AM, Paolo Carlini <paolo.carlini@oracle.com> wrote:
> Indeed, I noticed it a few days ago, and seemed overkill ;) Really, we already have implementation experience about these flags, eg in iostream, and I dont think we want std::bitset everywhere.

So here's the change. It's under testing now, but could took several
hours. If someone has a faster machine, please tell the result :)

As a simple test, `g++ -m32 test.cc` didn't fail.


-- 
Tim Shen
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