challenge.d

template Params(alias fun) {
    static if (is(typeof(fun) P  == __parameters)) {
        alias Params = P;
    }
}

template forward(alias fun) {
	static foreach(idx, overload; __traits(getOverloads, __traits(parent, fun), __traits(identifier, fun)))
        @(__traits(getAttributes, overload)) auto forward(Params!overload p) {
            return fun(p);
        }
}

@("foo")
void myfun(int a, ref double b, out string c) {
	b += 5.0;
	c = "omg";
}
int myfun(in string a, inout double b) {
	return 40;
}

import core.stdc.time;
void set (time_t value = time(null)) {
	import std.stdio;
	writeln(value);
}


void main() {
	double b = 4.3;
	string s = "asdas";
	forward!myfun(4, b, s);

	forward!set();

	import std.stdio;
	writeln(b, s);

}