[Boost-bugs] [Boost C++ Libraries] #6750: istream_iterator in spirit might have defect

Subject: [Boost-bugs] [Boost C++ Libraries] #6750: istream_iterator in spirit might have defect
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-03-31 02:25:15

#6750: istream_iterator in spirit might have defect
---------------------------------------------+------------------------------
 Reporter:  Li He <I.demonstrate@…>          |       Owner:  djowel 
     Type:  Bugs                             |      Status:  new    
Milestone:  To Be Determined                 |   Component:  spirit 
  Version:  Boost 1.49.0                     |    Severity:  Problem
 Keywords:  istream_iterator                 |  
---------------------------------------------+------------------------------
 The following program yields a wrong parsing result:
 {{{
 #include <iostream>
 #include <vector>
 #include <algorithm>
 #include <iterator>

 #include <boost/spirit/include/qi.hpp>
 #include <boost/spirit/include/phoenix_core.hpp>
 #include <boost/spirit/include/phoenix_operator.hpp>
 #include <boost/spirit/include/phoenix_stl.hpp>

 namespace spirit = boost::spirit ;
 namespace qi = boost::spirit::qi ;
 namespace ascii = boost::spirit::ascii ;
 namespace phoenix = boost::phoenix ;

 using qi::double_ ;
 using qi::_1 ;
 using phoenix::push_back ;
 using phoenix::ref ;

 int
 main (int argc, char* argv[]) {
   spirit::istream_iterator iter (std::cin), end ;
   std::vector<double> v ;
   bool r = spirit::qi::phrase_parse
     (iter, end,
      double_ [push_back (ref(v), _1)] % ',',
      ascii::space) ;

   if (r) {
     std::cout << "vector: " ;
     std::copy (v.begin(), v.end(),
                std::ostream_iterator<double> (std::cout, ", ")) ;
     std::cout << std::endl ;
   }
   return 0 ;
 }
 }}}

 You may test it with input like "1,2,3,4" and the output is "vector:
 1,2,3,44,". When we switch to std::getline and use the
 std::string::const_iterator, the result turns out fine.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6750>
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