Struct StateMapRef

pub struct StateMapRef<'a, U>(/* private fields */);

Read-only state map.

The U parameter is tag type that represents the map’s context.

Implementations

impl<U> StateMapRef<'static, U>

pub fn empty() -> Self

Static empty map.

impl<'a, U> StateMapRef<'a, U>

pub fn contains<T: StateValue>(self, id: impl Into<StateId<T>>) -> bool

Gets if the ID is set in this map.

pub fn get<T: StateValue>(self, id: impl Into<StateId<T>>) -> Option<&'a T>

Reference the ID’s value set in this map.

pub fn copy<T: StateValue + Copy>(self, id: impl Into<StateId<T>>) -> Option<T>

Copy the ID’s value set in this map.

pub fn get_clone<T: StateValue + Clone>( self, id: impl Into<StateId<T>>, ) -> Option<T>

Clone the ID’s value set in this map.

pub fn req<T: StateValue>(self, id: impl Into<StateId<T>>) -> &'a T

Reference the ID’s value set in this map or panics if the key is not set.

pub fn flagged(self, id: impl Into<StateId<()>>) -> bool

Gets if a state ID without value is set.

pub fn is_empty(self) -> bool

If no state is set.

pub fn ptr_eq(self, other: Self) -> bool

Returns true if self and other reference the same map.

Trait Implementations

impl<U> Clone for StateMapRef<'_, U>

fn clone(&self) -> Self

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<U> Debug for StateMapRef<'_, U>

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

Formats the value using the given formatter.

impl<U> Copy for StateMapRef<'_, U>