Macro cached_patterns 

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

Like patterns! but wraps the matcher in LazyLock for zero-cost reuse.

Returns &'static SimplifiedPatternMatcher<C> instead of an owned matcher. The matcher is constructed only once on first call and cached globally.

Use this for stateless pm_*() functions that are called repeatedly (e.g., once per kernel). Avoids re-constructing closures and hashmaps on every call.

Example

pub fn pm_render() -> &'static TypedPatternMatcher {
    cached_patterns! { ... }
}