On Tue, Jun 10, 2014 at 9:54 AM, Jonathan Wakely <jwak...@redhat.com> wrote: > I'm sure this is because I still don't understand all the regex code, > but doesn't this change mean that for an "extended" mode regex with > backrefs, the user could define _GLIBCXX_REGEX_USE_THOMPSON_NFA and > backrefs wouldn't work?
Sorry I missed that basic POSIX (BRE) has back-references (damn!), but extended POSIX (ERE) doesn't. So it should look like: - if (!__re._M_automaton->_M_has_backref + if (!(__re._M_automaton->_M_has_backref || (__re._M_flags & regex_constants::ECMAScript)) ...and all deleted _M_has_backref lines should be undeleted. This patch is a temporary (I'm not sure how long though) workaround; BFS's support for ECMAScript with no back-references shall be done finally. -- Regards, Tim Shen
