Question

I’m writing on C#.
I like using event. It’s very natural for my classes to just publish event and don’t care who and how will they process. However as I will need to migrate my code to c++ should I still use event? How easy would be to rewrite such code to c++? Probably it makes sense to use other technics that easier to rewrite to c++?

upd i’ve found similar question C#-like events in C++, Composition

Answer 1

What to use instead of c# event to have code easy to port to c++?

If you are sure what you think about is only related to event, then I think you don’t need to make any change.

Just write a underlying class for event, that reaches your goal.

You might have various ways to do. The first step would be thinkg about CALLBACKs.

Here I provide some code for example, invoking c++ callbacks through P-invoke and wrap into delegates in c#.

Import the callback:

[DllImport("devlink.dll")]
static extern int DLRegisterType2CallDeltas(uint pbxh,DLCALLLOGEVENT cb);

Define the delegate:

public delegate void DLCALLLOGEVENT(uint pbxh, StringBuilder info);

Declare the event:

public event EventHandler<CallLogEventArgs> CallLogEvent;

Wrap the event to call:

DLRegisterType2CallDeltas(
    pbxHandle,
    (pbxh, info) => {
        lock(thisLock)
            if(
                default(EventHandler<CallLogEventArgs>)!=CallLogEvent
                &&
                pbxHandle==pbxh
                )
                CallLogEvent(this, new CallLogEventArgs(info));
    }
    );

You’d need to do something reversed/inverted in c++. But first of all, implement a class for event or delegate would get you closer to done what you’ve asked.