On Wed, Jan 9, 2013 at 3:05 PM, Han Pingtian <hanpt@linux.vnet.ibm.com>wrote:

> Looks like if using "e" flag, both would be matched here.
>

Yes, (ie) works perfectly. Found it in the document:

    |  This flag causes any pattern matching that would be performed on the
subscript to use plain string matching instead
-- 
 rahul