[Patch] Patch set for regex instantiation

[Jonathan Wakely]

On 11/01/14 19:48 -0500, Tim Shen wrote:
>Here're 4 patches that finally led the _Compiler's instantiation and
>some other optimization for compiling time.
>
>1) Create class _ScannerBase to make _Scanner pithier. Move const
>static members to src/c++11/regex.cc.

I think it might be time to revisit this change and put the data
members of _ScannerBase into the .so, as we're creating and
initializing 136 bytes of duplicated constants every time we construct
a std::regex.

Alternatively, we could just make them local statics instead of member
data and still remove the duplciation (see attached).


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