multiply ranges

#!opend test app.d
--- app.d
import std;
struct rangewrap(R...){
	R r;
	auto opBinary(string op:"*",R2)(R2 r2){
		return rangewrap!(R,R2)(r,r2);
	}
	void opDispatch(string __s__,T...)(T args){
		foreach(tuple;cartesianProduct(r)){
			mixin(__s__~"(tuple,args);");
	}}
}

unittest{
	(rangewrap!()() * [1,2,3] * "abc" * [true,false]).writeln;
}