[Patch] Internal functions for testsuite in regex

[Paolo Carlini]

Hi,

On 10/04/2013 04:13 PM, Tim Shen wrote:
> This is based on disscusions
> here(http://gcc.gnu.org/ml/libstdc++/2013-10/msg00034.html)
>
> And it successfully find a bug in regex_executor.tcc :)
>
> Booted and tested under -m32, -m64 and debug before the change in
> regex_executor.tcc;
> -m32 and -m64 only for regex_executor.tcc, but I'll start a bootstrap now.
Can you please add short comments inline in the code explaining the 
semantics of the new functions? A short comment before each one. In 
particular, the new *_testsuite functions, isn't immediately clear in 
what they differ from the non-_testsuite variants. In any case we should 
figure out a better name, maybe even *_internal, if we can't find 
anything more accurate, but it should be self-explaining in terms of 
their C++ semantics.

Please also document in a comment before the definition of 
__regex_search_impl the __policy parameter (not just in the body of the 
function). And I don't see why we can't use an enumeration instead of 
integers, like

enum class _RegexExecutorPolicy : int { _AutoExecutor, _DFSExecutor, 
_BFSExecutor };

More trivial issues: inline functions (like all the new _testsuite ones) 
should be in .h, not in .tcc. Some unuglified names, like res ans res2.

Paolo.