David Rodríguez Ibeas wrote:

Hi,

  Is it possible to override/generate a return value? I want to connect a signal that has a bool return value to a method that has a void return type, generating always a true return.

class X
{
public:
  void f();
};
boost::signal< bool () > sgn;

X x;
sgn.connect( boost::bind( &X::f, &x ) ); // error, signal has bool return, method doesn't

Using lambda, you can use the comma operator.

sgn.connect((boost::lambda::bind(&X::f, &x), true))