veddan

6 ms·

31.
by veddan 12y ago
> I really hope that the Rust compiler has some really good error messages explaining what the problem is because I couldn't see what was wrong with this fragment until I read the explanation. They're not always perfect, but in
32.
by veddan 12y ago
Checked array access is implemented with unsafe code. Actual code implementing the `[]` operator for arrays ("slices"): fn index(&self, &index: &uint) -> &T { assert!(index < self.len());
33.
by veddan 12y ago
> By avoiding privileged optimizations in the frontend and by giving programmers low-level tools where they need them, Rust empowers library authors to get things done without having to bug the Rust developers themselves to implement the
34.
by veddan 12y ago
In most cases, you use iterators rather than indexing for x in v.iter_mut() { // do some work with x } or if you need the index for (i, x) in v.iter_mut().enumerate() { // do some work
35.
by veddan 12y ago
If we take your code and modify it so that the compiler can't just get rid of the array acces, we get: extern crate test; fn main() { let mut v = vec![1i32, 2, 3, 4, 5]; let vlen = v.len(); for i in r
36.
by veddan 12y ago
Also, the CM-5 moved away from the hypercube topology of the CM-2 to a fat tree.
37.
by veddan 12y ago
>Rust does not use reference-counting GC. Instead, it has a fairly unique borrow checking system for garbage collection, which not only handles cleaning up memory but also cleaning open sockets, file handlers, etc. There is a generic typ
38.
by veddan 12y ago
It's not just a matter of the compiler missing optimizations. Some (unsafe, low-level) algorithms have to be written differently (and less efficiently) because of the possibility of unwinding. Disallowed patterns typically look somethi
39.
by veddan 12y ago
Unwinding through C is undefined behavior, so a Rust function called from C must catch all exceptions and (preferably) return an error code to the C caller.
40.
by veddan 12y ago
I'm sure a similar argument could be made about many human activities.