This has subsequently been adopted by other languages, notably Dart (2014), Python (2015), Hack (HHVM), and drafts of ECMAScript 7 (JavaScript), Scala, and C++.
随后被其他语言采用，特别是Dart（2014），Python（2015）， Hack（HHVM）以及ECMAScript 7（JavaScript）、Scala和C++的草案。