[Log4cpp-devel] CategoryStream

[Paul D. <pa...@du...>]

I'm missing something.  I have a class like so:

    class foo
    {
      public:
        std::ostream& print(std::ostream& out) { out << m_value; return out; }

      private:
        int m_value;
    };

    inline std::ostream& operator<<(std::ostream& out, const foo& f)
    { return f.print(out); }

I am trying to stream an instance of foo to a CategoryStream.

    logger.infoStream() << "Foo: " << f;

The compiler is balking about the "(*_buffer) << t;" statement in the
operator<<() method template in CategoryStream saying that the call is
ambiguous.  It's suggesting operator<<() routines for a whole mess of
base types but doesn't see the one for my class.

This works:
    std::stringstream str;
    str << foo();

Why doesn't this?
    logger.infoStream() << foo();

Paul