Macro css 

css!() { /* proc-macro */ }

css!(name: value, …) — kwarg syntax for the Css builder.

Lowers to a Css::new() method chain (Css::new().name(value) .…). Css is taken from the call site’s scope, so use whisker::prelude::* (which re-exports Css) is the only import callers need.

The proc-macro implementation tolerates partial input from rust-analyzer’s completion engine: a kwarg whose value hasn’t been typed yet (css!(back|) is expanded as .<name>(()) so RA still sees a real method-call site and fires its method-name completion. The unit () is intentionally type-incorrect; the program already doesn’t compile while the user is mid-typing.

use whisker::prelude::*;

let s = css!(
    background_color: Color::hex(0x1A1330),
    padding: (px(8), px(16)),
    border: Border::new().width(px(1)).style(BorderStyle::Solid),
);