[Bug libstdc++/57808] New: operators == and != for regex_token_iterator need to be const

[chasonr at newsguy dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57808

            Bug ID: 57808
           Summary: operators == and != for regex_token_iterator need to
                    be const
           Product: gcc
           Version: 4.8.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: chasonr at newsguy dot com

In libstdc++-v3/include/bits/regex.h, the methods operator== and operator!= for
regex_token_iterator are not declared const.  This is not consistent with the
C++11 standard, section 28.12.2, which specifies these operators to be declared
const.