forum.alglib.net

Hi Everyone,

I need to optimize a function that is a non static member of the class. Because I can't pass a pointer to a non static member function, this command return an error:



How can I pass the pointer to the function, considering that I can make it static?

minlmoptimize() accepts additional ptr parameter (NULL by default) that is forwarded to the callback func.

You can make a wrapper function that accepts void* pointer, converts it to the pointer to an instance of your class and calls its method. Correct me if I wrong, but you may even use lambdas to create a wrapper function (if you refrain from capturing local variables - such lambdas can't be converted to function pointers).

Yes, I think using lambdas is the best way, but I can't find the correct syntax.
I have tried this:



where fun is defined as:



But this doesn't work because it doesn't recognize this lambda as a pointer to "fun". Where am I wrong?

You should change lambda signature to match that of the callback accepted by minlpoptimize: (const real_1d_array& X, real_1d_array& f, void* ptr). What you have here can be cast to pointer to function, but this pointer has completely different signature.

Thanks Sergey for your answer, but every syntax I try, it gives me an error.
Could you show me exactly what I should type?