[Patch] Whole regex refactoring and current status

[Andreas Schwab]

Paolo Carlini <paolo.carlini@oracle.com> writes:

> In my humble opinion involving the whole std::bitset container for a
> syntax option is way overkill.

It's already used for match_flag_type anyway.

Andreas.

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Andreas Schwab, SUSE Labs, schwab@suse.de
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