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MergeMap

Struct MergeMap

pub struct MergeMap<K, V>(/* private fields */);

Expand description

Merge two HashMap<K, V>s, right-biased — entries from update overwrite collisions in current. (Right-bias matches typical LangGraph / dict-update semantics.)

Implementations§

impl<K, V> MergeMap<K, V>

pub const fn new() -> Self

Construct.

Trait Implementations§

impl<K: Clone, V: Clone> Clone for MergeMap<K, V>

fn clone(&self) -> MergeMap<K, V>

Returns a duplicate of the value. Read more

1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more

impl<K: Debug, V: Debug> Debug for MergeMap<K, V>

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

Formats the value using the given formatter. Read more

impl<K, V> Default for MergeMap<K, V>

fn default() -> Self

Returns the “default value” for a type. Read more

impl<K, V> Reducer<HashMap<K, V>> for MergeMap<K, V>
where K: Eq + Hash + Send + Sync + 'static, V: Send + Sync + 'static,

fn reduce(&self, current: HashMap<K, V>, update: HashMap<K, V>) -> HashMap<K, V>

Combine current and update. Implementations are free to consume both; many simply return update (replace) or push the second into the first (append).

impl<K: Copy, V: Copy> Copy for MergeMap<K, V>

Auto Trait Implementations§

impl<K, V> Freeze for MergeMap<K, V>

impl<K, V> RefUnwindSafe for MergeMap<K, V>

impl<K, V> Send for MergeMap<K, V>

impl<K, V> Sync for MergeMap<K, V>

impl<K, V> Unpin for MergeMap<K, V>

impl<K, V> UnsafeUnpin for MergeMap<K, V>

impl<K, V> UnwindSafe for MergeMap<K, V>

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> AsOut<T> for T
where T: Copy,

fn as_out(&mut self) -> Out<'_, T>

Returns an out reference to self.

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, dest: *mut u8)

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

Performs copy-assignment from self to dest. Read more

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

fn __clone_box(&self, _: Private) -> *mut ()

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<U> 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> PolicyExt for T
where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more

impl<T> Same for T

type Output = T

Should always be Self

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

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

impl<T> WithSubscriber for T

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more