Struct WarnOnce 

pub struct WarnOnce { /* private fields */ }

Deduplicates a repeating fault warning to once per condition episode.

PluginHost::apply_enabled runs every render frame, so an ungated steady-state fault (an enabled plugin that is not discovered) emits the same warn ~60×/s — measured at ~480 identical warns in one 8 s run. should_warn returns true only on the first call per key; clear re-arms the key when the condition resolves (successful spawn, teardown) so a recurrence warns again.

Implementations

impl WarnOnce

pub fn should_warn(&mut self, key: &str) -> bool

Whether the caller should emit the warn: true the first time key is seen, false while the same key persists.

pub fn clear(&mut self, key: &str)

Re-arm key so a later recurrence warns again.

pub fn clear_except(&mut self, keep: &HashSet<String>)

Re-arm every key except those in keep — call when the monitored set shrinks, so an entry that left and later returns warns again.

Trait Implementations

impl Debug for WarnOnce

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for WarnOnce

fn default() -> Self

Returns the “default value” for a type.