Struct CombinedState 

pub struct CombinedState<T> {
    pub current: Option<T>,
    pub staging: Vec<StateChange<T>>,
    pub legacy_state_key: Option<Value>,
}

Fields

current: Option<T>

staging: Vec<StateChange<T>>

legacy_state_key: Option<Value>

Legacy state keys that no longer identical to the latest serialized form (usually caused by code change). They will be deleted when the next change is applied.

Implementations

impl<T> CombinedState<T>

pub fn current(desired: T) -> Self

pub fn staging(change: StateChange<T>) -> Self

pub fn from_change( prev: Option<CombinedState<T>>, change: Option<Option<&T>>, ) -> Self

where T: Clone,

pub fn possible_versions(&self) -> impl Iterator<Item = &T>

pub fn always_exists(&self) -> bool

pub fn always_exists_and(&self, predicate: impl Fn(&T) -> bool) -> bool

pub fn legacy_values<V: Ord + Eq, F: Fn(&T) -> &V>( &self, desired: Option<&T>, f: F, ) -> BTreeSet<&V>

pub fn has_state_diff<S>( &self, state: Option<&S>, map_fn: impl Fn(&T) -> &S, ) -> bool

where S: PartialEq,

Trait Implementations

impl<T: Clone> Clone for CombinedState<T>

fn clone(&self) -> CombinedState<T>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for CombinedState<T>

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

Formats the value using the given formatter.

impl<T: Debug + Clone> Default for CombinedState<T>

fn default() -> Self

Returns the “default value” for a type.

impl<T: PartialEq + Debug + Clone> PartialEq<T> for CombinedState<T>

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.