Macro timing_entries 

macro_rules! timing_entries {
    (
        $visibility:vis enum $name:ident {
            $($entry:ident $(= $value:expr)?),*
            $(,)?
        }
        $counter_visibility:vis static $counters:ident: [$counter_type:ty];
    ) => { ... };
    (
        $visibility:vis enum $name:ident {
            $($entry:ident $(= $value:expr)?),*
            $(,)?
        }
    ) => { ... };
    (
        @entries
        $visibility:vis enum $name:ident {
            $($entry:ident $(= $value:expr)?),*
            $(,)?
        }
    ) => { ... };
}

Declares an enum and optionally a static counter collection for timing entries.

The generated enum has ALL, COUNT, and to_str associated items. Adding static COUNTERS: [Counter]; after the enum generates a [Counter; COUNT] static, initialized from TimingCounter::INITIAL. This keeps entry names, array length, and reporting order in one declaration.

Without the static declaration, the macro only generates the enum and its helpers.