Re: [Boost-users] Serializing UUIDs into text archives

Subject: Re: [Boost-users] Serializing UUIDs into text archives
From: Robert Ramey (ramey_at_[hidden])
Date: 2012-03-07 14:19:31

Matthias Vallentin wrote:
> Serializing a UUID into a boost::archive::binary_[io]archive works
> fine. However, when changing to a text archive, I get a compiler
> error with
> gcc 4.7 in C++11 mode on Darwin. Here is a small example:
>
>    #include <boost/archive/text_oarchive.hpp>
>    #include <boost/iostreams/device/back_inserter.hpp>
>    #include <boost/iostreams/filtering_stream.hpp>
>    #include <boost/uuid/uuid_generators.hpp>
>    #include <boost/uuid/uuid_serialize.hpp>
>
>    int main()
>    {
>        std::vector<char> v;
>        boost::iostreams::filtering_ostream
> stream(boost::iostreams::back_inserter(v));
>        boost::archive::text_oarchive oa(stream);
>
>        boost::uuids::uuid id = boost::uuids::random_generator()();
>        oa << id;
>
>        return 0;
>    }
>
> The error is in basic_text_oprimitive line 92:
>
>    cannot bind 'std::basic_ostream<char>' lvalue to
> 'std::basic_ostream<char>&&'
>
> Any ideas what's going on? (I attached the full error message below.)
>
>    Matthias
>
> In file included from
>
> /opt/local/include/boost/archive/text_oarchive.hpp:30:0, from
> test.cc:2:
> /opt/local/include/boost/archive/basic_text_oprimitive.hpp: In
> instantiation of 'void
> boost::archive::basic_text_oprimitive<OStream>::save(const T&) [with T
> = boost::uuids::uuid; OStream = std::basic_ostream<char>]':

This looks to me to some issue with boost::io_streams.  Try your
example with a regular stream (e.g. std::fostream).

Robert Ramey