Scala had the feature for a while (since 2.10, 2013 I think). Many Scala features have been abused in the wild, this one not so much. This is mostly useful to

Scala had the feature for a while (since 2.10, 2013 I think). Many Scala features have been abused in the wild, this one not so much. This is mostly useful to library authors, the textbook example being a safe SQL interpolator mentioned in the JEP.