Struct Change 

pub struct Change<T> { /* private fields */ }

A change of a list (Change<T>): of one item, or of a range of items.

Upstream’s change of one item has an empty range (RangeChange<T>.Empty), and a change of a range has an empty item (ItemChange<T>.Empty, whose item is the default value of T); here range is empty for the change of an item, and the change of a range has no item (try_item).

Implementations

impl<T> Change<T>

pub fn new(reason: ListChangeReason, current: T, index: Option<usize>) -> Self

The change of one item (Change(ListChangeReason, T, int index = -1)).

pub fn range_change( reason: ListChangeReason, items: Vec<T>, index: Option<usize>, ) -> Self

The change of a range (Change(ListChangeReason, IEnumerable<T>, int index = -1)).

Panics

For a reason of one item (IndexOutOfRangeException).

pub fn moved(current: T, current_index: usize, previous_index: usize) -> Self

A move (Change(T, int currentIndex, int previousIndex)).

pub fn with_previous( reason: ListChangeReason, current: T, previous: Option<T>, current_index: Option<usize>, previous_index: Option<usize>, ) -> Self

The change of one item with every part (Change(ListChangeReason, T, in Optional<T>, int, int)).

Panics

For Add with a previous item, Replace without one, and Refresh without an index (ArgumentException).

pub fn reason(&self) -> ListChangeReason

The reason (Reason).

pub fn change_type(&self) -> ChangeType

Whether the change is of an item or of a range (Type).

pub fn item(&self) -> &ItemChange<T>

The change of the item (Item).

Panics

For the change of a range, whose item upstream is empty.

pub fn try_item(&self) -> Option<&ItemChange<T>>

The change of the item, None for the change of a range.

pub fn range(&self) -> &RangeChange<T>

The range (Range): empty for the change of an item.

Trait Implementations

impl<T: Clone> Clone for Change<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T> Debug for Change<T>

where T: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result

ToString, with the item or the range.

impl<T: Eq> Eq for Change<T>

impl<T> FromIterator<Change<T>> for ChangeSet<T>

fn from_iter<I: IntoIterator<Item = Change<T>>>(iter: I) -> Self

Creates a value from an iterator.

impl<T: Hash> Hash for Change<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq> PartialEq for Change<T>

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl<T: PartialEq> StructuralPartialEq for Change<T>