Interesting, do you have any references or examples? Some brief googling around hasn't found anything like this. The fact that overloading was an issue makes me

Interesting, do you have any references or examples? Some brief googling around hasn't found anything like this. The fact that overloading was an issue makes me think that TF1 was doing something different because Typescript generic type parameters allow you to do "overloading" galore (by only specifying constraints rather than enumerating every possible call format).