Full text of the tweet:<p>> Oh great. ([](){})() is now legal C++.<p>That's interesting, but what does it mean? I don't know enough about C++ to parse that expression.<p>More importantly, what coding styles or features do the syntax rules enable by allowing us to use that string of symbols? I don't use Twitter, but I think that Matthew missed an opportunity to write an interesting and useful article or blog post by expressing this through Twitter. He already has a number of other articles here: <a href="http://matt.might.net/articles/" rel="nofollow">http://matt.might.net/articles/</a>