pub struct UnordBag<V> { /* private fields */ }
Expand description

This is a collection type that tries very hard to not expose any internal iteration. This is a useful property when trying to uphold the determinism invariants imposed by the query system.

This collection type is a good choice for collections the keys of which don’t have a semantic ordering and don’t implement Hash or Eq.

See MCP 533 for more information.

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impl<V> UnordBag<V>

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pub fn new() -> Self

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pub fn len(&self) -> usize

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pub fn push(&mut self, v: V)

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pub fn items(&self) -> UnordItems<&V, impl Iterator<Item = &V>>

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pub fn into_items(self) -> UnordItems<V, impl Iterator<Item = V>>

Trait Implementations§

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impl<V: Clone> Clone for UnordBag<V>

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fn clone(&self) -> UnordBag<V>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<V: Debug> Debug for UnordBag<V>

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

Formats the value using the given formatter. Read more
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impl<V, __D: Decoder> Decodable<__D> for UnordBag<V>
where V: Decodable<__D>,

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fn decode(__decoder: &mut __D) -> Self

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impl<V: Default> Default for UnordBag<V>

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fn default() -> UnordBag<V>

Returns the “default value” for a type. Read more
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impl<V, __E: Encoder> Encodable<__E> for UnordBag<V>
where V: Encodable<__E>,

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fn encode(&self, __encoder: &mut __E)

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impl<T> Extend<T> for UnordBag<T>

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fn extend<I: IntoIterator<Item = T>>(&mut self, iter: I)

Extends a collection with the contents of an iterator. Read more
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fn extend_one(&mut self, item: A)

🔬This is a nightly-only experimental API. (extend_one)
Extends a collection with exactly one element.
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fn extend_reserve(&mut self, additional: usize)

🔬This is a nightly-only experimental API. (extend_one)
Reserves capacity in a collection for the given number of additional elements. Read more
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impl<T, I: Iterator<Item = T>> From<UnordItems<T, I>> for UnordBag<T>

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fn from(value: UnordItems<T, I>) -> Self

Converts to this type from the input type.
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impl<HCX, V: Hash + Eq + HashStable<HCX>> HashStable<HCX> for UnordBag<V>

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fn hash_stable(&self, hcx: &mut HCX, hasher: &mut StableHasher)

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impl<T> !IntoIterator for UnordBag<T>

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type Item

The type of the elements being iterated over.
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type IntoIter: Iterator<Item = Self::Item>

Which kind of iterator are we turning this into?
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fn into_iter(self) -> Self::IntoIter

Creates an iterator from a value. Read more
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impl<V: PartialEq> PartialEq for UnordBag<V>

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fn eq(&self, other: &UnordBag<V>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<V: Eq> Eq for UnordBag<V>

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impl<V> StructuralEq for UnordBag<V>

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impl<V> StructuralPartialEq for UnordBag<V>

Auto Trait Implementations§

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impl<V> RefUnwindSafe for UnordBag<V>
where V: RefUnwindSafe,

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impl<V> Send for UnordBag<V>
where V: Send,

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impl<V> Sync for UnordBag<V>
where V: Sync,

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impl<V> Unpin for UnordBag<V>
where V: Unpin,

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impl<V> UnwindSafe for UnordBag<V>
where V: UnwindSafe,

Blanket Implementations§

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impl<T> Aligned for T

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const ALIGN: Alignment = const ALIGN: Alignment = Alignment::of::<Self>();

Alignment of Self.
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<C, T> ExtendUnord<T> for C
where C: Extend<T> + UnordCollection,

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fn extend_unord<I>(&mut self, items: UnordItems<T, I>)
where I: Iterator<Item = T>,

Extend this unord collection with the given UnordItems. This method is called extend_unord instead of just extend so it does not conflict with Extend::extend. Otherwise there would be many places where the two methods would have to be explicitly disambiguated via UFCS.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

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

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

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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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
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<'a, T> Captures<'a> for T
where T: ?Sized,