Macro zng_unique_id::static_id

macro_rules! static_id {
    ($(
        $(#[$attr:meta])*
        $vis:vis static ref $IDENT:ident: $IdTy:ty;
    )+) => { ... };
}

Declares a static unique ID that is lazy inited.

Dereferencing this static generates the ID and caches it.

Examples

static_id! {
    /// Metadata foo ID.
    pub static ref FOO_ID: StateId<bool>;
}