[Patch] Whole regex refactoring and current status

[Paolo Carlini]

Hi,

>This is already documented:
>
>http://gcc.gnu.org/onlinedocs/libstdc++/manual/source_code_style.html#coding_style.bad_identifiers

Indeed. As a simple to remember rule never use single underscore + single uppercase. Usually we add a p, like _Cp, etc. Plenty of examples everywhere. At the moment I can't do the search&replace, any such patch is preapproved though.

Thanks,
Paolo