X-Git-Url: https://git.ralfj.de/web.git/blobdiff_plain/1af9cc085fccb07e0f1aeb83e47d413b2adcf888..ad332bcffb616f49b59b770ac102b40495e2835b:/ralf/_posts/2018-04-05-a-formal-look-at-pinning.md diff --git a/ralf/_posts/2018-04-05-a-formal-look-at-pinning.md b/ralf/_posts/2018-04-05-a-formal-look-at-pinning.md index edaf6c6..121de4b 100644 --- a/ralf/_posts/2018-04-05-a-formal-look-at-pinning.md +++ b/ralf/_posts/2018-04-05-a-formal-look-at-pinning.md @@ -34,7 +34,7 @@ The short version is that I view Rust types with private invariants as not havin You may be wondering why sharing is a separate typestate here; shouldn't that just be read-only access to a `T` that someone else owns? However, that clearly doesn't work for `&Cell`; to explain types with interior mutability we *need* sharing as a separate state. I explained this in more detail in the previous post, but as a quick example consider that, if you fully own a `RefCell`, the first field (storing the current count of readers/writers) has no special meaning whatsoever. -This is witnessed by [`RefCell::get_mut`](https://doc.rust-lang.org/beta/std/cell/struct.RefCell.html#method.get_mut) ignoring that field. +This is witnessed by [`RefCell::get_mut`](https://doc.rust-lang.org/stable/std/cell/struct.RefCell.html#method.get_mut) ignoring that field. In fact, it would be sound to add a `RefCell::reset(&mut self)` that just resets this field to `0`. ## Pinning