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I'd really like to have type-level numbers natively in Rust. Implementing a vector generic on its dimensions seems to be so much easier in D!

Any prospect about that?

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There is definitely a prospect! The core team understands the need. It still needs an RFC though, and once that is accepted it will have to make its way from nightly, to beta, then finally to stable. So alas, not any time soon. :(

There's an RFC that could address the lack of type-level integers: https://github.com/rust-lang/rfcs/pull/1657

Oh duh, I forgot about that - even commented on a few days ago!

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