Syntax highlighting wrong for unions

[yodaldevoid]

Sublime Text Version

Sublime Text 3 (Build 3143)

Rust Enhanced Version

v2.10.0

Operating system

Ubuntu 17.10

Expected behavior

unions should be highlighted like structs.

Actual behavior

union is treated like an unknown keyword.

Steps to reproduce

1. Write out a union definition like so:

#[repr(C)]
union Example {
    u0: u32,
    u1: u32,
}

2. Be disappointed that union is not highlighted.

Thank you for your work on this project.

[TheIronBorn]

I'm not familiar with union, but some cursory research suggests we could probably just add union as a keyword for our current matching of struct definitions. Anyone have other info?

[TheIronBorn]

Seems unions can't use tuple-definition or unit-definition.

[TheIronBorn]

This of the union RFC suggests we may need to be more careful about matching on union.

[ehuss]

I started work on this a long while ago, but didn't finish because at the time the grammar wasn't really well defined, and I kept finding lots of little problems with the existing Sublime syntax. Since then, a lot of great progress has been made on the reference. The section on unions would be a good start for this particular issue. I can take another look at my old stuff and see what I have.

[ehuss]

I found my old work, which I think should be good enough for now. At some point I'll start digging through the other bad highlighting I've found in the past, but this should be good enough for basic unions.