[Patch] Regex bracket matcher cache optimization

[Paolo Carlini]

Hi,

On 01/07/2014 07:48 AM, Tim Shen wrote:
> I'd prefer to propose another patch that should be commited with this
> one, which fix bugs (say _M_flags & regex_constants::icase, not "&&"),
> and do more  "matcher optimization".
>
> It is now more DRY (_RegexTranslator<>) and efficient, but <regex>
> takes longer to compile, mainly because now we have 4 times more
> _Compiler<> versions :)
Ideally, I would suggest committing first the improvements in your 
previous patch (by the way, thanks for the numbers!) + the pure bug 
fixes and separate the further performance improvements which have 
compile-time performance implications (how big?), see if, eg, Jon has 
something to recommend. Can we do that?

Thanks,
Paolo.