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use std::time::{Instant, Duration};
pub struct MaybeExpired<T> {
value: Option<T>,
expire_at: Instant
}
impl<T> MaybeExpired<T> {
pub fn new() -> Self {
Self {
value: None,
expire_at: Instant::now()
}
}
pub fn get(&self) -> Option<&T> {
if self.expire_at > Instant::now() {
self.value.as_ref()
} else {
None
}
}
pub fn set(&mut self, value: T, expire_after: Duration) {
self.value.replace(value);
self.expire_at = Instant::now() + expire_after
}
pub fn expire(&mut self) {
self.expire_at = Instant::now();
self.value = None;
}
}
#[cfg(test)]
mod tests;