[Patch] Rewrite _StateSeq in regex

[Tim Shen]

According to this
email(http://gcc.gnu.org/ml/libstdc++/2013-09/msg00005.html), I add a
testcase.



-- 
Tim Shen
-------------- next part --------------
A non-text attachment was scrubbed...
Name: stateseq.patch
Type: application/octet-stream
Size: 41350 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20130904/b87dd3f2/attachment.obj>