[Boost-users] [iostreams] calling sink member function

From: Daniel Schlyder (daniel_at_[hidden])
Date: 2005-05-12 13:28:14

Hi,

The following used to compile with MinGW GCC 3.4.2:

<code>
#include <boost/iostreams/concepts.hpp>
#include <boost/iostreams/stream_facade.hpp>

#include <iostream>

class my_sink : public boost::iostreams::sink
{
    public:
    
    std::streamsize write(char const *, std::streamsize size)
    {
        return size;
    }
    
    void foo()
    {
        std::cout << "foo() called" << std::endl;
    }
};

int main()
{
    boost::iostreams::stream_facade<my_sink> out;
    
    out->foo();
    
    return 0;
}
</code>

Now I get the following error:

E:/libs/boost/boost/iostreams/stream_facade.hpp: In member function
   `my_sink * boost::iostreams::stream_facade<my_sink, char_traits<char> >
    ::operator->()':
boost_iostreams_issues.cpp:36:   instantiated from here
E:/libs/boost/boost/iostreams/stream_facade.hpp:119: error: no match for
    'operator *' in '*(
        (
            (
                boost::base_from_member<
                    boost::iostreams::streambuf_facade<
                        my_sink, char_traits<char>, boost::iostreams::output
                    >, 0
                > *
            )(
                (boost::iostreams::stream_facade<my_sink, char_traits<char> >
                    *
                )this
            )
        ) + 4u
    )->boost::base_from_member<
        boost::iostreams::streambuf_facade<
            my_sink, char_traits<char>, boost::iostreams::output
        >, 0
    >::member'

It compiles if I remove the call to foo().

What must I do to make it work again?

Thanks,

--
Daniel Schlyder
http://bitblaze.com/