Re: Policy Design

{ Reformatted; please limit your lines to 70 characters, and please
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On Friday, July 20, 2012 8:43:17 PM UTC-4, Nevin :-] Liber wrote:

Played around with boost::bind/boost:;function for sometime but I'm
coming up short. Given:

test ca(boost::bind(user_defined_handler_A, _1));
where user_defined_A is defined as:
void user_defined_A ( A& ) {}

The composite types A and B are updated based on a read of an external
interface. More importantly, the user defined handler above expects
an A object, hence if the type read from the interface is B then I
dont want to invoke the user defined handler unnecessarily. The
question: Is there anyway to determine the type from the lambda within
the process function or ..if not the lambda .. how i can determine the
type of the user defined handler?

void process() const {
   // pseudo code
   type = get_type_from_interface() ;
   if ( user_handler == a && type == a )
    handler();
   else {
   // otherwise ignore
   }
}

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