Struct scale_info::prelude::collections::linked_list::Cursor[][src]

pub struct Cursor<'a, T> where
    T: 'a, 
{ /* fields omitted */ }
🔬 This is a nightly-only experimental API. (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)

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)

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)

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)

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)

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)

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)

Provides a reference to the front element of the cursor’s parent list, or None if the list is empty.

🔬 This is a nightly-only experimental API. (linked_list_cursors)

Provides a reference to the back element of the cursor’s parent list, or None if the list is empty.

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Auto Trait Implementations

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Pipes by value. This is generally the method you want to use. Read more

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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

Calls .tap_deref_mut() only in debug builds, and is erased in release builds. Read more

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Calls tap in debug builds, and does nothing in release builds.

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Calls tap_mut in debug builds, and does nothing in release builds.

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Calls tap_ref_mut in debug builds, and does nothing in release builds.

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Calls tap_borrow in debug builds, and does nothing in release builds.

Provides mutable access to the borrow for modification.

Calls tap_borrow_mut in debug builds, and does nothing in release builds. Read more

Immutably dereferences self for inspection.

Calls tap_deref in debug builds, and does nothing in release builds.

Mutably dereferences self for modification.

Calls tap_deref_mut in debug builds, and does nothing in release builds. Read more

The resulting type after obtaining ownership.

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🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

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The type returned in the event of a conversion error.

Performs the conversion.

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Performs the conversion.