[Boost-bugs] [Boost C++ Libraries] #12945: boost::iostreams filtering streambufs only work with binary archive

Subject: [Boost-bugs] [Boost C++ Libraries] #12945: boost::iostreams filtering streambufs only work with binary archive
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2017-04-04 08:11:04

#12945: boost::iostreams filtering streambufs only work with binary archive
------------------------------+---------------------------
 Reporter:  fiesh@…           |      Owner:  ramey
     Type:  Feature Requests  |     Status:  new
Milestone:  To Be Determined  |  Component:  serialization
  Version:  Boost 1.62.0      |   Severity:  Problem
 Keywords:                    |
------------------------------+---------------------------
 Since there is no portable binary format, using the text archive and
 gzipping it seems convenient.  However, using boost::iostream's
 filtering_streambuf only works with the binary archive, not the text
 archive, which is somewhat surprising.

 {{{#!cpp
 #include <iostream>
 #include <sstream>

 #include <boost/archive/binary_oarchive.hpp>
 #include <boost/archive/text_oarchive.hpp>
 #include <boost/iostreams/filter/gzip.hpp>
 #include <boost/iostreams/filtering_streambuf.hpp>
 #include <boost/serialization/vector.hpp>

 int main()
 {
         const std::vector<int> v{0, 1, 2};
         std::stringstream ss;

         {
                 boost::iostreams::filtering_ostreambuf o;
                 o.push(boost::iostreams::gzip_decompressor());
                 o.push(ss);
                 // filtering_ostreambuf isn't accepted by text_oarchive's
 ctor, only by binary_oarchive
                 // So this doesn't work
                 boost::archive::text_oarchive oa(o);
                 // But this does
                 // boost::archive::binary_oarchive oa(o);
                 oa << v;
         }

         std::cout << ss.str() << '\n';
         return 0;
 }
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/12945>
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