ceylon-lang.org VS cheats.rs

> One thing Rust could really use are anonymous unions (A | B |C instead of E::A(A), E::B(B), E::C(C)). They are to enums what tuple types are to structs.

Ceylon had union types, which is the only place i've seen these: https://github.com/eclipse-archived/ceylon-lang.org/blob/mas...

Another thing Rust enums are missing is having each variant be a type. If you have an enum Shape with variants Circle, Rectangle, and Polygon, there is no way to write a function which only takes a Circle. So you end up defining a struct for each case, then making your enum a trivial wrapper round the three structs. You end up with Shape::Circle and Circle, which are different things, and writing code like c.0.radius to get at the fields. It's rather inelegant. So either variants should be types in their own right, or an enum should be defined as a composition of existing types.

Reposting: https://cheats.rs/#memory-layout

> Does the value take up the same width regardless of state?

Yes. As the other commenter mentioned, it's the size of the largest variant (same as a union in C) + a tag (almost the same as an enum in C). In some cases, the compiler even manages to optimize out the tag.

> Is it just me or the output PDF has quite a bit of broken pages

Nope! The breaks are really there. I guess they converted the HTML to PDF somehow and it didn't work as expected. However in case you need it offline, the source [1] is written for zola [2] - a single-binary static site generator (of course written in Rust). You can clone the repo and run `zola serve` in it. It renders quite well.

[1] https://github.com/ralfbiedert/cheats.rs/

[2] https://www.getzola.org/