Struct SnapshotStateList 

pub struct SnapshotStateList<T: Clone + 'static> { /* private fields */ }

A list whose reads subscribe the current scope and whose writes notify its readers, as Jetpack Compose’s SnapshotStateList. Clones share the same list.

Implementations

impl<T: Clone + 'static> SnapshotStateList<T>

pub fn with_runtime<I>(values: I, runtime: RuntimeHandle) -> Self

where I: IntoIterator<Item = T>,

Creates a list holding values in runtime.

pub fn as_state(&self) -> State<Vec<T>>

Returns a read-only view of the state that holds the elements.

pub fn as_mutable_state(&self) -> MutableState<Vec<T>>

Returns the writable state that holds the elements.

pub fn len(&self) -> usize

Returns the number of elements.

pub fn is_empty(&self) -> bool

Returns true if the list has no elements.

pub fn to_vec(&self) -> Vec<T>

Returns a copy of the elements.

pub fn iter(&self) -> Vec<T>

Returns a copy of the elements for iteration. Later writes do not change that copy.

pub fn get(&self, index: usize) -> T

Returns a copy of the element at index. Panics if index is out of range.

pub fn get_opt(&self, index: usize) -> Option<T>

Returns a copy of the element at index, or None if it is out of range.

pub fn first(&self) -> Option<T>

Returns a copy of the first element, or None if the list is empty.

pub fn last(&self) -> Option<T>

Returns a copy of the last element, or None if the list is empty.

pub fn push(&self, value: T)

Appends value at the end.

pub fn extend<I>(&self, iter: I)

where I: IntoIterator<Item = T>,

Appends all elements of iter in one write.

pub fn insert(&self, index: usize, value: T)

Inserts value at index, moving later elements back. Panics if index is past the end.

pub fn set(&self, index: usize, value: T) -> T

Replaces the element at index and returns the old one. Panics if index is out of range.

pub fn remove(&self, index: usize) -> T

Removes and returns the element at index. Panics if index is out of range.

pub fn pop(&self) -> Option<T>

Removes and returns the last element, or None if the list is empty.

pub fn clear(&self)

Removes all elements.

pub fn retain<F>(&self, predicate: F)

where F: FnMut(&T) -> bool,

Keeps the elements for which predicate returns true.

pub fn replace_with<I>(&self, iter: I)

where I: IntoIterator<Item = T>,

Replaces all elements with those of iter in one write.

Trait Implementations

impl<T: Clone + Clone + 'static> Clone for SnapshotStateList<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 + Clone + 'static> Debug for SnapshotStateList<T>

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

Formats the value using the given formatter.