Ticket #1076: testcase.cpp

#include <boost/signal.hpp> 

struct event_handler
{
        void operator()()
        {
        }
};

int main()
{
        event_handler eh;

        boost::signal<void ()> sig;
        sig.connect(eh);
        sig.disconnect(eh);             // VS2005 SP1 error C2678: binary '==' : no operator found which takes a left-hand operand of type 'const event_handler' (or there is no acceptable conversion) 
}