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We had an RFC for Pi types [1] but in the ended, decided it was too much, too soon [2]. The "const generics" RFC [3] adds a minimal, forward-compatible from of this, and is on track to land this year.

1: https://github.com/rust-lang/rfcs/issues/1930

2: https://github.com/rust-lang/rfcs/pull/1657#issuecomment-268... and https://github.com/rust-lang/rfcs/pull/1931#issuecomment-304...

3: https://github.com/rust-lang/rfcs/blob/master/text/2000-cons...

We may or may not end up with them someday, but we need experience with RFC 2000 first.

Holy crow! As someone who remembers when the rust-lang/rfcs repo was created, I can't believe we're over 2000 RFCs submitted!

Issues and PRs are the same thing in GitHub internals, and the RFC number is the PR number. There haven’t been 2000 accepted PRs :)

You're right. I've spent too much time in GitLab, where they are counted separately :). And, besides, I forgot about the PRs to fix typos and so forth.

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