Great answer and explanations. Works like a charm :)
2013/2/4 Steve Lorimer
The problem is here:
converter->register_error_callback( boost::bind(&another_class::log_error, converter, _1) );
The second parameter to bind should be an instance of the class whose member function you're trying to bind to:
It should rather be
converter->register_error_callback( boost::bind(&another_class::log_error, *another_class_instance*, _1) );
Under the hood, what will be happening is boost::function will call *another_class_instance->log_error(...)*
* *
If you think about it, you can't call converter->log_error, since coordinates_converter::log_error doesn't exist.
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