Pointers

- sometimes we need stuff that cannot be statically proven.. raw pointers, T
- arrghh yes seriously pointers in TypeScript let's go

Safe code may convert a borrow into a raw pointer, while converting back requires an unsafe context:

class User {}

let user = new User();

let borrow: &User = &user;   // default: a checked borrow
let pointer: *User = &user;  // typed as raw: an inert, unchecked pointer value
let again: &User = pointer;  // ERROR: pointers only reborrow inside @unsafe