[Boost-bugs] [Boost C++ Libraries] #13207: boost::spirit::istream_iterator unusable with boost::asio::ip::tcp::iostream

Subject: [Boost-bugs] [Boost C++ Libraries] #13207: boost::spirit::istream_iterator unusable with boost::asio::ip::tcp::iostream
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-09-13 01:27:53

#13207: boost::spirit::istream_iterator unusable with
boost::asio::ip::tcp::iostream
-----------------------------------------------+---------------------------
 Reporter:  Christoper Friedt <chrisfriedt@…>  |      Owner:  Joel de
                                               |  Guzman
     Type:  Bugs                               |     Status:  new
Milestone:  To Be Determined                   |  Component:  spirit
  Version:  Boost 1.65.0                       |   Severity:  Showstopper
 Keywords:  istream_iterator                   |
-----------------------------------------------+---------------------------
 Hi,

 I'm really looking forward to using boost::spirit in my next project.
 Unfortunately, I seem to have hit a roadblock in that the
 boost::spirit::istream_iterator constructor completely locks up when it is
 passed a boost::asio::ip::tcp::iostream reference.

 I come from a (much stronger) C background, so perhaps I'm missing the
 greater picture, but in the "spirit" of a C++ stream-based API, I would
 have thought that any input stream would work with spirit's forward
 iterator - at least that's how I interpreted the documentation.

 A really simple example is the following:

 {{{
 #include <boost/asio.hpp>
 #include <boost/spirit/include/support_istream_iterator.hpp>
 #include <iostream>

 int main( int argc, char *argv[] ) {

         static const int port = 443;

         if ( 2 != argc ) {
                 std::cout << "usage: " << argv[ 0 ] << " <fqdn>" <<
 std::endl;
                 std::cout << std::endl;
                 std::cout << "where <fqdn> is e.g. www.google.ca" <<
 std::endl;
                 return 0;
         }

         std::string fqdn( argv[ 1 ] );

         std::cout << "creating fds.." << std::endl;

         boost::asio::ip::tcp::iostream fds( fqdn, std::to_string( port )
 );

         if ( ! fds ) {
                 std::cerr << "unable to create fds: " <<
 fds.error().message() << std::endl;
                 return 1;
         }

         std::cout << "creating istream_iterator.." << std::endl;

         boost::spirit::istream_iterator begin( fds );

         std::cout << "created istream_iterator!" << std::endl;

         return 0;
 }
 }}}

 Compile with

 g++ -std=c++14 -o foo foo.cpp -lboost_system

 Any thoughts?

-- 
Ticket URL: <https://svn.boost.org/trac10/boost/ticket/13207>
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