pub struct Cursor<'a, T> where
T: 'a, { /* private fields */ }
linked_list_cursors
)mtls
only.Expand description
A cursor over a LinkedList
.
A Cursor
is like an iterator, except that it can freely seek back-and-forth.
Cursors always rest between two elements in the list, and index in a logically circular way.
To accommodate this, there is a “ghost” non-element that yields None
between the head and
tail of the list.
When created, cursors start at the front of the list, or the “ghost” non-element if the list is empty.
Implementations
sourceimpl<'a, T> Cursor<'a, T>
impl<'a, T> Cursor<'a, T>
sourcepub fn index(&self) -> Option<usize>
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn index(&self) -> Option<usize>
linked_list_cursors
)Returns the cursor position index within the LinkedList
.
This returns None
if the cursor is currently pointing to the
“ghost” non-element.
sourcepub fn move_next(&mut self)
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn move_next(&mut self)
linked_list_cursors
)Moves the cursor to the next element of the LinkedList
.
If the cursor is pointing to the “ghost” non-element then this will move it to
the first element of the LinkedList
. If it is pointing to the last
element of the LinkedList
then this will move it to the “ghost” non-element.
sourcepub fn move_prev(&mut self)
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn move_prev(&mut self)
linked_list_cursors
)Moves the cursor to the previous element of the LinkedList
.
If the cursor is pointing to the “ghost” non-element then this will move it to
the last element of the LinkedList
. If it is pointing to the first
element of the LinkedList
then this will move it to the “ghost” non-element.
sourcepub fn current(&self) -> Option<&'a T>
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn current(&self) -> Option<&'a T>
linked_list_cursors
)Returns a reference to the element that the cursor is currently pointing to.
This returns None
if the cursor is currently pointing to the
“ghost” non-element.
sourcepub fn peek_next(&self) -> Option<&'a T>
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn peek_next(&self) -> Option<&'a T>
linked_list_cursors
)Returns a reference to the next element.
If the cursor is pointing to the “ghost” non-element then this returns
the first element of the LinkedList
. If it is pointing to the last
element of the LinkedList
then this returns None
.
sourcepub fn peek_prev(&self) -> Option<&'a T>
🔬 This is a nightly-only experimental API. (linked_list_cursors
)
pub fn peek_prev(&self) -> Option<&'a T>
linked_list_cursors
)Returns a reference to the previous element.
If the cursor is pointing to the “ghost” non-element then this returns
the last element of the LinkedList
. If it is pointing to the first
element of the LinkedList
then this returns None
.
Trait Implementations
impl<'_, T> Send for Cursor<'_, T> where
T: Sync,
impl<'_, T> Sync for Cursor<'_, T> where
T: Sync,
Auto Trait Implementations
impl<'a, T> RefUnwindSafe for Cursor<'a, T> where
T: RefUnwindSafe,
impl<'a, T> Unpin for Cursor<'a, T>
impl<'a, T> UnwindSafe for Cursor<'a, T> where
T: RefUnwindSafe,
Blanket Implementations
impl<'a, T> AsTaggedExplicit<'a> for T where
T: 'a,
impl<'a, T> AsTaggedExplicit<'a> for T where
T: 'a,
fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self>
impl<'a, T> AsTaggedImplicit<'a> for T where
T: 'a,
impl<'a, T> AsTaggedImplicit<'a> for T where
T: 'a,
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> Instrument for T
impl<T> Instrument for T
sourcefn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
sourcefn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
sourceimpl<T> IntoCollection<T> for T
impl<T> IntoCollection<T> for T
sourcefn into_collection<A>(self) -> SmallVec<A> where
A: Array<Item = T>,
fn into_collection<A>(self) -> SmallVec<A> where
A: Array<Item = T>,
Converts self
into a collection.
fn mapped<U, F, A>(self, f: F) -> SmallVec<A> where
F: FnMut(T) -> U,
A: Array<Item = U>,
sourceimpl<T> ToOwned for T where
T: Clone,
impl<T> ToOwned for T where
T: Clone,
type Owned = T
type Owned = T
The resulting type after obtaining ownership.
sourcefn clone_into(&self, target: &mut T)
fn clone_into(&self, target: &mut T)
toowned_clone_into
)Uses borrowed data to replace owned data, usually by cloning. Read more
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
fn vzip(self) -> V
sourceimpl<T> WithSubscriber for T
impl<T> WithSubscriber for T
sourcefn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self> where
S: Into<Dispatch>,
Attaches the provided Subscriber
to this type, returning a
WithDispatch
wrapper. Read more
sourcefn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
Attaches the current default Subscriber
to this type, returning a
WithDispatch
wrapper. Read more