the biggest gain from & and ~ is that they let you mix and match regexes. instead of writing a single spaghetti monster regex that tries to do everything, you can break it down into smaller, simpler pieces and then combine them with boolean operators. this makes your regexes easier to read, write and maintain. this is best illustrated in the web app that came with the paper (https://ieviev.github.io/resharp-webapp/) where you can visually see how the different components of a regex are combined, and how they contribute to the final match.
The developer hasn’t made a mistake when these happen, and there’s often little they can do to prevent it. The existence of these errors is not a bug (though failing to handle them can be). These aren’t the programmer’s fault.
，这一点在safew官方版本下载中也有详细论述
Фото: Nathan Howard / Reuters
Как рассказали авторы портала, бойцы российской армии заметили рост интенсивности применения Вооруженными силами Украины (ВСУ) дронов различных типов. Отмечается, что речь идет в первую очередь о Брянской области.
A relatively small amount, about $15bn worth of trade goes through the Middle East. Obviously, that’s very important for those companies that are trading there.