On Tuesday, 3 December 2019 at 17:45:27 UTC, H. S. Teoh wrote:
The thing is, `void` means "no return type" (or "no type" in some contexts), i.e., void == TBottom in that case.
Not *quite* correct. void is not a bottom type; it's a unit type, meaning that it's a type with only 1 value (as is null, interestingly). void does not mean "no return type"; it means "there's only 1 possible value that can be returned". A function returning TBottom means that the function will never return, e.g., it loops forever, or throws an exception, etc.
I agree with the OP that it's silly not to give typeof(null) a name. As null is a unit type, we could easily have `null` stand in for typeof(null) as well. A type that contains only one value can be synonymous with that value (see also, Rust's unit type (), which has one value, ()).
