Feature request: alphabetic sorting of struct/enum fields

[PvdBerg1998]

Whenever the order of a struct or enum would be completely irrelevant, I like to keep them in alphabetic order. However, this gets slightly annoying to maintain when adding new fields. Therefore I propose an optional automatic sorting attribute, think #[rustfmt::sort].

My first idea was to create a clippy lint for this, but having this done automatically would be the best.

[mwillsey]

On a related note, sorting the arms of a match based on the order in the enum declaration (alphabetical or not), would be quite handy.

[scampi]

@mwillsey you mean to reflect the enum's order on the match ? I don't think that is possible since we have only information coming from the AST

[jeremyBanks]

In addition to being able to sort fields, it would also be nice to be able to sort top-level items (Structs, Traits, etc.) in a file.

[bsodmike]

This would be nice!!

[jendrikw]

I would also like to see this for methods of a trait.

[realsama]

I hope this will be added someday. It will save the minutes spent sorting them manually.

[finnbear]

👍 for opt-in to apply this to all structs, enums, unions, and simple match statements on enums, except repr(C) and friends, enum Enum { Variant = # }, or #[rustfmt(skip)].

[WinkelCode]

Another +1 here, I already naturally try to sort stuff alphabetically, so this would be a time saver and ensure consistency. I also +1 having it optionally available for top-level items as @jeremyBanks suggested.

[laralove143]

fwiw jetbrains ides have a sort lines command (select fields, maybe with opt+up arrow idk for windows, double press shift, type sort lines, hit enter or assign a keybind to sort lines) not ideal but better than manual sorting