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This post floats a variation of boats’ UnpinCell proposal that I’m calling MinPin.1 MinPin’s goal is to integrate Pin into the language in a “minimally disruptive” way2 – and in particular a way that is fully backwards compatible. Unlike Overwrite, MinPin does not attempt to make Pin and &mut “play nicely” together. It does however leave the door...

In July, boats presented a compelling vision in their post pinned places. With the Overwrite trait that I introduced in my previous post, however, I think we can get somewhere even more compelling, albeit at the cost of a tricky transition. As I will argue in this post, the Overwrite trait effectively becomes a better version of the existing...

What would you say if I told you that it was possible to (a) eliminate a lot of “inter-method borrow conflicts” without introducing something like view types and (b) make pinning easier even than boats’s pinned places proposal, all without needing pinned fields or even a pinned keyword? You’d probably say “Sounds great… what’s the catch?” The...

This is the first of what I think will be several follow-up posts to “Claiming, auto and otherwise”. This post is focused on clarifying and tweaking the design I laid out previously in response to some of the feedback I’ve gotten. In future posts I want to lay out some of the alternative designs I’ve heard. TL;DR: People like it If there’s any...

This blog post proposes adding a third trait, Claim, that would live alongside Copy and Clone. The goal of this trait is to improve Rust’s existing split, where types are categorized as either Copy (for “plain old data”1 that is safe to memcpy) and Clone (for types that require executing custom code or which have destructors). This split has...