pub struct Stack<T: Linked<Links<T>>> { /* private fields */ }
Expand description
An intrusive singly-linked mutable FIFO stack.
This is a very simple implementation of a linked Stack
, which provides
O(1) push
and pop
operations. Items are
popped from the stack in the opposite order that they were pushed in.
A Stack
also implements the Iterator
trait, with the
Iterator::next
method popping elements from the end of the stack.
In order to be part of a Stack
, a type T
must implement
the Linked
trait for stack::Links<T>
.
Pushing elements into a Stack
takes ownership of those elements
through an owning Handle
type. Dropping a
Stack
drops all elements currently linked into the stack.
Implementations§
source§impl<T> Stack<T>where
T: Linked<Links<T>>,
impl<T> Stack<T>where T: Linked<Links<T>>,
sourcepub fn push(&mut self, element: T::Handle)
pub fn push(&mut self, element: T::Handle)
Pushes element
onto the end of this Stack
, taking ownership
of it.
This is an O(1) operation that does not allocate memory. It will never loop.
This takes ownership over element
through its owning Handle
type. If the Stack
is dropped before the
pushed element
is pop
pped from the stack, the element
will be dropped.
sourcepub fn pop(&mut self) -> Option<T::Handle>
pub fn pop(&mut self) -> Option<T::Handle>
Returns the element most recently pushed to this Stack
,
or None
if the stack is empty.
This is an O(1) operation which does not allocate memory. It will never loop and does not spin.
Trait Implementations§
source§impl<T> Iterator for Stack<T>where
T: Linked<Links<T>>,
impl<T> Iterator for Stack<T>where T: Linked<Links<T>>,
source§fn next(&mut self) -> Option<Self::Item>
fn next(&mut self) -> Option<Self::Item>
source§fn next_chunk<const N: usize>(
&mut self
) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where
Self: Sized,
fn next_chunk<const N: usize>( &mut self ) -> Result<[Self::Item; N], IntoIter<Self::Item, N>>where Self: Sized,
iter_next_chunk
)N
values. Read more1.0.0 · source§fn size_hint(&self) -> (usize, Option<usize>)
fn size_hint(&self) -> (usize, Option<usize>)
1.0.0 · source§fn count(self) -> usizewhere
Self: Sized,
fn count(self) -> usizewhere Self: Sized,
1.0.0 · source§fn last(self) -> Option<Self::Item>where
Self: Sized,
fn last(self) -> Option<Self::Item>where Self: Sized,
source§fn advance_by(&mut self, n: usize) -> Result<(), NonZeroUsize>
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iter_advance_by
)n
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fn nth(&mut self, n: usize) -> Option<Self::Item>
n
th element of the iterator. Read more1.28.0 · source§fn step_by(self, step: usize) -> StepBy<Self>where
Self: Sized,
fn step_by(self, step: usize) -> StepBy<Self>where Self: Sized,
1.0.0 · source§fn chain<U>(self, other: U) -> Chain<Self, <U as IntoIterator>::IntoIter>where
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U: IntoIterator<Item = Self::Item>,
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U: IntoIterator,
fn zip<U>(self, other: U) -> Zip<Self, <U as IntoIterator>::IntoIter>where Self: Sized, U: IntoIterator,
source§fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>where
Self: Sized,
G: FnMut() -> Self::Item,
fn intersperse_with<G>(self, separator: G) -> IntersperseWith<Self, G>where Self: Sized, G: FnMut() -> Self::Item,
iter_intersperse
)separator
between adjacent items of the original iterator. Read more1.0.0 · source§fn map<B, F>(self, f: F) -> Map<Self, F>where
Self: Sized,
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Self: Sized,
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1.0.0 · source§fn skip_while<P>(self, predicate: P) -> SkipWhile<Self, P>where
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Self: Sized,
P: FnMut(&Self::Item) -> bool,
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1.57.0 · source§fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>where
Self: Sized,
P: FnMut(Self::Item) -> Option<B>,
fn map_while<B, P>(self, predicate: P) -> MapWhile<Self, P>where Self: Sized, P: FnMut(Self::Item) -> Option<B>,
1.0.0 · source§fn skip(self, n: usize) -> Skip<Self>where
Self: Sized,
fn skip(self, n: usize) -> Skip<Self>where Self: Sized,
n
elements. Read more1.0.0 · source§fn take(self, n: usize) -> Take<Self>where
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Self: Sized,
F: FnMut(&mut St, Self::Item) -> Option<B>,
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Self: Sized,
U: IntoIterator,
F: FnMut(Self::Item) -> U,
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Self: Sized,
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)1.0.0 · source§fn partition<B, F>(self, f: F) -> (B, B)where
Self: Sized,
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F: FnMut(&Self::Item) -> bool,
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iter_is_partitioned
)true
precede all those that return false
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Self: Sized,
F: FnMut(B, Self::Item) -> R,
R: Try<Output = B>,
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Self: Sized,
F: FnMut(Self::Item) -> R,
R: Try<Output = ()>,
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Self: Sized,
F: FnMut(B, Self::Item) -> B,
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Self: Sized,
F: FnMut(Self::Item, Self::Item) -> Self::Item,
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&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<<R as Try>::Output>>>::TryTypewhere
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R: Try<Output = Self::Item>,
<R as Try>::Residual: Residual<Option<Self::Item>>,
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)1.0.0 · source§fn all<F>(&mut self, f: F) -> boolwhere
Self: Sized,
F: FnMut(Self::Item) -> bool,
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Self: Sized,
F: FnMut(Self::Item) -> bool,
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Self: Sized,
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&mut self,
f: F
) -> <<R as Try>::Residual as Residual<Option<Self::Item>>>::TryTypewhere
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R: Try<Output = bool>,
<R as Try>::Residual: Residual<Option<Self::Item>>,
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)1.0.0 · source§fn position<P>(&mut self, predicate: P) -> Option<usize>where
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B: Ord,
Self: Sized,
F: FnMut(&Self::Item) -> B,
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FromB: Default + Extend<B>,
Self: Sized + Iterator<Item = (A, B)>,
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)N
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)Iterator
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fn partial_cmp_by<I, F>(self, other: I, partial_cmp: F) -> Option<Ordering>where Self: Sized, I: IntoIterator, F: FnMut(Self::Item, <I as IntoIterator>::Item) -> Option<Ordering>,
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Self: Sized,
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Iterator
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F: FnMut(&Self::Item, &Self::Item) -> Option<Ordering>,
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is_sorted
)impl<T> Send for Stack<T>where T: Send + Linked<Links<T>>,
Safety
A Stack
is Send
if T
is send, because moving it across threads
also implicitly moves any T
s in the stack.