Improve rust syntax highlighting.

[gloridifice]

Check for existing issues

• Completed

Describe the feature

Some improvement points I found of zed rust syntax highlighting are below.

lifetime

Color rust lifetime.

Zed ⬇️

RustRover (Expected) ⬇️

generic

Color generic with a separate color. (now it's same as "type")
Zed ⬇️

RustRover (Expected) ⬇️

proc macro

Color proc macros with a separate color. (Now it's same as "editor.foreground")
Zed ⬇️

RustRover (Expected) ⬇️

macro's name

Recognize macro name's ! as a whole. (I don't know if this is intentional)

Zed ⬇️

If applicable, add mockups / screenshots to help present your vision of the feature

No response

[universalmind303]

some additional examples

zed

VSCode

[mascanho]

Is this still a global issue or is it just my zed? It seems like the syntax highlight lacks a bit, a lot of things share the same colour, especially when compared to neovim. Thank you for the amazing effort everyone.

[nathansobo]

@iamnbutler What are your thoughts on coloring lifetimes in our themes? It would indeed be nice to make them stand out a bit more like the examples people are showing.

[iamnbutler]

IMO some of the examples are better (like the lifetime ones). The attribute example from rustrover is far worse though, I don't know why you would want to reduce contrast between the attribute and it's values.

[iamnbutler]

I'm down with the lifetimes change 👍

[roycrippen4]

I really, really like having type arguments/lifetimes both colorized and italicized.

Neovim

Zed

It would be awesome to reuse my existing tree-sitter queries to merge/override zed's queries and just tweak the colors associated with the matches. Colors that differentiate between primitive types and type identifiers would also be great.

The lack of a user-facing, fine-grained customization for syntax highlighting is less than ideal. That said, it seems like zed is close to super-customizable and the vim integration probably the best outside of vim/neovim.