Struct zng_state_map :: StateMapRef Copy item path

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

fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source§

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

Performs copy-assignment from source. Read more

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

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

Formats the value using the given formatter. Read more

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

Auto Trait Implementations§

impl<'a, U> !UnwindSafe for StateMapRef<'a, U>

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T
where T: ?Sized,

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T
where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> CloneToUninit for T
where T: Clone,

unsafe fn clone_to_uninit(&self, dst: *mut T)

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

Performs copy-assignment from self to dst. Read more

impl<T> From<T> for T

fn from(t: T) -> T

Returns the argument unchanged.

impl<T> Instrument for T

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<T, U> Into for T
where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl<T> IntoEither for T

fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more