A hard-to-read blog post best summarized here: http://news.ycombinator.com/item?id=4500661 http://news.ycombinator.com/item?id=4500661 a macro that expands

A hard-to-read blog post best summarized here: http://news.ycombinator.com/item?id=4500661 http://news.ycombinator.com/item?id=4500661 a macro that expands his code into code that adds type hints to all of the vars