Question

I would like to give an instruction as a parameter:

execute_at_frame(int frame_number, <instruction>)
{
    for(f = 1 ; f < F_MAX ; f++)
    {
        /* other instructions */
        if (f == frame_number)
            /* execute <instruction> */
        /* other instructions */
    }
}

• One type of call: execute_at_frame(5,execute(42));
• Another type of call: execute_at_frame(6,process());

Is that (or something similar) possible?

Thanks in advance 🙂

Answer 1

Yes, if you use std::bind (C++11):

template <class F>
void execute_at_frame(int frame_number, F instruction)
{
    for(int f = 1 ; f < F_MAX ; f++)
    {
        /* other instructions */
        if (f == frame_number)
            instruction();
        /* other instructions */
    }
}

/* ... */

execute_at_frame(5,process); // no bind for functions without parameters
execute_at_frame(5,std::bind(execute,42));

Otherwise you’ll have to prepare a interface for instructions.