variadic-functions

I am working on implementing a function that would execute another function a few seconds in the future, depending upon the user's input. I have a priority queue of a class (which I am calling TimedEvent) that contains a function pointer to the action I want it to execute at the end of the interval. Say for instance that the user wants the program to call a function "xyz" after 3 seconds, they would create a new TimedEvent with the time and the function pointer to xyz and add it to the priority queue (which is sorted by time, with the soonest events happening first). I have been able to

I am working on a little pet project in Clojure. I have a function that I pass varargs: (defn foor [bar & args] (let new-args (custom-transform args)] (do-something new-args)))))) But, do-something is expecting varargs, not a list object. In custom-transform (defn custom-transform [& args] (if vars vars nil)) How do I preserve the "vararg"-iness of my args after applying a transformation? I think apply should do the trick: (apply do-something new-args) Your problem isn't specific to varargs. What you want to do is to call do-something , passing the elements of an array as the arguments to the

Hi I have a class with a member function that takes a variable number of arguments. The class knows how many arguments to expect once it is instantiated . e.g class myClass { myClass(int num_args){na=num_args;}; private: int na; public: void do_something(int num_args, ...); } void myClass::do_something(int num_args, ...) { va_list vl; va_start(vl, num_args); for(int i=0; i < num_args; i++) do_anotherthing(va_arg(vl, type)); va_end } so i end up calling as follows: myClass A(5); myClass B(4); A.do_something(5, a, b, c, d, e); B.do_something(4, a, b, c, d); It seems untidy to me to have to keep

I have a java class like below which I want to create an instance of this class dynamically by using class name. class Demo { public Demo(String... s) { //some initialization here. } } And I want to create an object using following code Class<?> klass = Class.forName("Demo"); Constructor<?> con = klass.getConstructor("**what should be here**"); Object obj = con.newInstance(param1, param2, ...); String... is just String[] so you can use Constructor<?> con = klass.getConstructor(String[].class); Note that you need to invoke the constructor like Object o = con.newInstance((Object) new String[] {

So, I got an idea to try to p/invoke C functions that take va_list . I know how to p/invoke classic varargs functions (with __arglist ), and as it seemed to me that va_list works just like an ArgIterator , I thought it might be possible to just pass it to the method: [DllImport("msvcrt.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.Cdecl)] public static extern int vswprintf(StringBuilder str, int length, string format, ArgIterator args); public static int vswprintf(StringBuilder str, int length, string format, __arglist) { return vswprintf(str, length, format, new