Variable number of arguments in C++?

Question

How can I write a function that accepts a variable number of arguments? Is this possible, how?

Answer 1

Using variadic templates, example to reproduce console.log as seen in JavaScript:

Console console;
console.log("bunch", "of", "arguments");
console.warn("or some numbers:", 1, 2, 3);
console.error("just a prank", "bro");

Filename e.g. js_console.h:

#include 
#include 

class Console {
protected:
    template 
    void log_argument(T t) {
        std::cout << t << " ";
    }
public:
    template 
    void log(Args&&... args) {
        int dummy[] = { 0, ((void) log_argument(std::forward(args)),0)... };
        cout << endl;
    }

    template 
    void warn(Args&&... args) {
        cout << "WARNING: ";
        int dummy[] = { 0, ((void) log_argument(std::forward(args)),0)... };
        cout << endl;
    }

    template 
    void error(Args&&... args) {
        cout << "ERROR: ";
        int dummy[] = { 0, ((void) log_argument(std::forward(args)),0)... };
        cout << endl;
    }
};