import extensions;
import extensions'routines;
import system'collections;
import system'routines;
import system'text;

extension op : String
{
    tokenize(separator,escape)
    {
        auto buffer := new TextBuilder();
        auto list := new ArrayList();

        bool escaping := false;
        self.forEach::(ch)
        {
            if (escaping)
            {
                buffer.write(ch);
                escaping := false
            }
            else if (ch == escape)
            {
                escaping := true
            }
            else if (ch == separator)
            {
                list.append(buffer.Value);
                buffer.clear()
            }
            else
            {
                buffer.write(ch)
            }
        };

        ^ list
    }
}

const string Testcase = "one^|uno||three^^^^|four^^^|^cuatro|";

public Program()
{
    Testcase.tokenize("|", "^").forEach(PrintingLn)
}