[Boost-bugs] [Boost C++ Libraries] #13080: Boost Xpressive ignores capture placeholders

Subject: [Boost-bugs] [Boost C++ Libraries] #13080: Boost Xpressive ignores capture placeholders
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-06-18 21:25:04

#13080: Boost Xpressive ignores capture placeholders
--------------------------------------------+--------------------------
 Reporter:  Evgeny Yashin <johny5.coder@…>  |      Owner:  eric_niebler
     Type:  Bugs                            |     Status:  new
Milestone:  To Be Determined                |  Component:  xpressive
  Version:  Boost 1.62.0                    |   Severity:  Showstopper
 Keywords:                                  |
--------------------------------------------+--------------------------
 This code:
 {{{
 #include "boost/xpressive/xpressive.hpp"

 int main()
 {
         using namespace boost::xpressive;

         cregex scheme = (s1 = +_w) >> "://";
         cregex host_ipv6 = (s2 = ('[' >> +(xdigit | ':') >> ']'));
         cregex uri_re = scheme >> host_ipv6;

         cmatch m;
         if( regex_match( "http://[fe::]", m, uri_re ) )
         {
                 //      [first, last) pair of iterators, with implicit
 operator string()
                 std::string protocol = m[1];
                 protocol = protocol;
         }

     return 0;
 }

 }}}

 It runs and it matches but protocol will contain empty string.
 Visual Studio 2015, in debug/release, 32/64bit.

--
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13080>
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