Struct scale_info::prelude::collections::linked_list::Cursor
source · [−]pub struct Cursor<'a, T> where
T: 'a, { /* private fields */ }linked_list_cursors)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
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
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.
🔬 This is a nightly-only experimental API. (linked_list_cursors)
linked_list_cursors)Provides a reference to the front element of the cursor’s parent list, or None if the list is empty.
Trait Implementations
Auto Trait Implementations
impl<'a, T> RefUnwindSafe for Cursor<'a, T> where
T: RefUnwindSafe,
impl<'a, T> UnwindSafe for Cursor<'a, T> where
T: RefUnwindSafe,
Blanket Implementations
Mutably borrows from an owned value. Read more
Causes self to use its Binary implementation when Debug-formatted.
Causes self to use its Display implementation when
Debug-formatted. Read more
Causes self to use its LowerExp implementation when
Debug-formatted. Read more
Causes self to use its LowerHex implementation when
Debug-formatted. Read more
Causes self to use its Octal implementation when Debug-formatted.
Causes self to use its Pointer implementation when
Debug-formatted. Read more
Causes self to use its UpperExp implementation when
Debug-formatted. Read more
Causes self to use its UpperHex implementation when
Debug-formatted. Read more
Pipes by value. This is generally the method you want to use. Read more
Borrows self and passes that borrow into the pipe function. Read more
Mutably borrows self and passes that borrow into the pipe function. Read more
Borrows self, then passes self.borrow() into the pipe function. Read more
Mutably borrows self, then passes self.borrow_mut() into the pipe
function. Read more
Borrows self, then passes self.as_ref() into the pipe function.
Mutably borrows self, then passes self.as_mut() into the pipe
function. Read more
Borrows self, then passes self.deref() into the pipe function.
fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: AsRef<T>,
T: 'a,
R: 'a,
fn pipe_as_ref<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: AsRef<T>,
T: 'a,
R: 'a,
Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more
fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: Borrow<T>,
T: 'a,
R: 'a,
fn pipe_borrow<'a, T, R>(&'a self, func: impl FnOnce(&'a T) -> R) -> R where
Self: Borrow<T>,
T: 'a,
R: 'a,
Pipes a trait borrow into a function that cannot normally be called in suffix position. Read more
fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
Self: Deref,
R: 'a,
fn pipe_deref<'a, R>(&'a self, func: impl FnOnce(&'a Self::Target) -> R) -> R where
Self: Deref,
R: 'a,
Pipes a dereference into a function that cannot normally be called in suffix position. Read more
Pipes a reference into a function that cannot ordinarily be called in suffix position. Read more
Immutable access to the Borrow<B> of a value. Read more
Mutable access to the BorrowMut<B> of a value. Read more
Immutable access to the AsRef<R> view of a value. Read more
Mutable access to the AsMut<R> view of a value. Read more
Immutable access to the Deref::Target of a value. Read more
Mutable access to the Deref::Target of a value. Read more
Calls .tap() only in debug builds, and is erased in release builds.
Calls .tap_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_borrow() only in debug builds, and is erased in release
builds. Read more
Calls .tap_borrow_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_ref() only in debug builds, and is erased in release
builds. Read more
Calls .tap_ref_mut() only in debug builds, and is erased in release
builds. Read more
Calls .tap_deref() only in debug builds, and is erased in release
builds. Read more
Provides immutable access to the reference for inspection.
Calls tap_ref in debug builds, and does nothing in release builds.
Provides mutable access to the reference for modification.
Calls tap_ref_mut in debug builds, and does nothing in release builds.
Provides immutable access to the borrow for inspection. Read more
Calls tap_borrow in debug builds, and does nothing in release builds.
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
fn tap_borrow_mut<F, R>(self, func: F) -> Self where
Self: BorrowMut<T>,
F: FnOnce(&mut T) -> R,
Provides mutable access to the borrow for modification.
Immutably dereferences self for inspection.
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
fn tap_deref_dbg<F, R>(self, func: F) -> Self where
Self: Deref,
F: FnOnce(&Self::Target) -> R,
Calls tap_deref in debug builds, and does nothing in release builds.
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
fn tap_deref_mut<F, R>(self, func: F) -> Self where
Self: DerefMut,
F: FnOnce(&mut Self::Target) -> R,
Mutably dereferences self for modification.