Yep, here's some related discussion: https://github.com/Microsoft/TypeScript/issues/185 https://github.com/Microsoft/TypeScript/issues/185 tl;dr: they want to

Yep, here's some related discussion: https://github.com/Microsoft/TypeScript/issues/185 https://github.com/Microsoft/TypeScript/issues/185 tl;dr: they want to support both of those features, the question is what syntax to use and how to introduce those features into the existing ecosystem.