Cant specialize "diagnostic.unnecessary" for variables / functions / members

[SneakyChocolate]

I am configuring my own theme and i cant figure out how to make a "diagnostic.unnecessary" setting for different types of things such as variables and functions. everything has the same color but i know that themes such as "dark_plus" and "zed_onedark" have specific "unnecessary" configurations, so that functions and variable are darker than their original. Thanks for help in advance :)

[the-mikedavis]

There isn't a way to style unnecessary and deprecated diagnostics based on whether the diagnostic is on a function or variable: those diagnostics come from the language server while highlighting is done with tree-sitter. Those themes are using the dim modifier for diagnostic.unnecessary and crossed_out for diagnostic.deprecated. The default theme uses those modifiers too:

helix/theme.toml

Lines 86 to 87 in 6309cc7

	"diagnostic.unnecessary" = { modifiers = ["dim"] }
	"diagnostic.deprecated" = { modifiers = ["crossed_out"] }

Diagnostic highlights are overlaid onto syntax highlights so the effect is that you have regular variable/function/etc. highlighting with the extra modifiers