| Writing is very hard. Despite the draft's "weaknesses", I thought it was well-written. Being one who has "enjoyed" numerous encounters with C pointers (and pointers to pointers, etc.), a lot of the explanation seemed elementary indeed. But I didn't mind the "review", in fact, kind of fun imagining I was a beginner and how amazing it would be to learn the details. I can see why Rust's concept of ownership is essential to grasp. However, the tutorial was a little murky when it came to the deeper subjects of "mutable borrow" and the cause of the example error. It took a few readings to get what made the line "let x = &v[0];" so crucial: "...&mut is a promise that there are no other references...", i.e., meaning the promise to "x", since "x" is the recipient (owner?) of the "&mut" of "v". The final paragraph is the key to the entire exposition, so it would be enormously helpful to take a few extra lines of text to clarify just how the expression "v.push("B");" violates the promise to "x". That's even more vital to your purpose as describing pointers in vivid detail. People new to Rust are beginners re: ownership, borrowing, et.al., and would benefit from a step-by-step walk through of these less familiar parts. |