Struct using_queue::UsingQueue [−][src]
Special queue-like data structure that includes the notion of usage to avoid items that were queued but never used from making it into the queue.
Implementations
impl<T> UsingQueue<T>
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pub fn new(max_size: usize) -> UsingQueue<T>
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Create a new struct with a maximum size of max_size
.
pub fn peek_last_ref(&self) -> Option<&T>
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Return a reference to the item at the top of the queue (or None
if the queue is empty);
it doesn’t constitute noting that the item is used.
pub fn use_last_ref(&mut self) -> Option<&T>
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Return a reference to the item at the top of the queue (or None
if the queue is empty);
this constitutes using the item and will remain in the queue for at least another
max_size
invocations of set_pending() + use_last_ref()
.
pub fn set_pending(&mut self, b: T)
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Place an item on the end of the queue. The previously pending item will be removed
if use_last_ref()
since it was set.
pub fn is_in_use(&self) -> bool
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Is there anything in the queue currently?
pub fn reset(&mut self)
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Clears everything; the queue is entirely reset.
pub fn get_used_if<P>(&mut self, action: GetAction, predicate: P) -> Option<T> where
P: Fn(&T) -> bool,
T: Clone,
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P: Fn(&T) -> bool,
T: Clone,
Fork-function for take_used_if
and clone_used_if
.
pub fn get_pending_if<P>(&mut self, predicate: P) -> Option<T> where
P: Fn(&T) -> bool,
T: Clone,
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P: Fn(&T) -> bool,
T: Clone,
Returns a clone of the pending block if f
returns true
with a reference to it as
a parameter, otherwise None
.
If pending block is not available will clone the first of the used blocks that match the predicate.
Auto Trait Implementations
impl<T> RefUnwindSafe for UsingQueue<T> where
T: RefUnwindSafe,
T: RefUnwindSafe,
impl<T> Send for UsingQueue<T> where
T: Send,
T: Send,
impl<T> Sync for UsingQueue<T> where
T: Sync,
T: Sync,
impl<T> Unpin for UsingQueue<T> where
T: Unpin,
T: Unpin,
impl<T> UnwindSafe for UsingQueue<T> where
T: UnwindSafe,
T: UnwindSafe,
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,