# Struct std::collections::hash_map::RawEntryBuilder

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    pub struct RawEntryBuilder<'a, K: 'a, V: 'a, S: 'a> { /* private fields */ }

🔬This is a nightly-only experimental API. (`hash_raw_entry` #56167)
Expand description

A builder for computing where in a HashMap a key-value pair would be stored.

See the `HashMap::raw_entry` docs for usage examples.

## Implementations§

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### impl<'a, K, V, S> RawEntryBuilder<'a, K, V, S>where S: BuildHasher,

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#### pub fn from_key<Q>(self, k: &Q) -> Option<(&'a K, &'a V)>where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

🔬This is a nightly-only experimental API. (`hash_raw_entry` #56167)

Access an entry by key.

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#### pub fn from_key_hashed_nocheck<Q>( self, hash: u64, k: &Q ) -> Option<(&'a K, &'a V)>where K: Borrow<Q>, Q: Hash + Eq + ?Sized,

🔬This is a nightly-only experimental API. (`hash_raw_entry` #56167)

Access an entry by a key and its hash.

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#### pub fn from_hash<F>(self, hash: u64, is_match: F) -> Option<(&'a K, &'a V)>where F: FnMut(&K) -> bool,

🔬This is a nightly-only experimental API. (`hash_raw_entry` #56167)

Access an entry by hash.

## Trait Implementations§

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### impl<K, V, S> Debug for RawEntryBuilder<'_, K, V, S>

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

Formats the value using the given formatter. Read more

## Auto Trait Implementations§

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### impl<'a, K, V, S> RefUnwindSafe for RawEntryBuilder<'a, K, V, S>where K: RefUnwindSafe, S: RefUnwindSafe, V: RefUnwindSafe,

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### impl<'a, K, V, S> Send for RawEntryBuilder<'a, K, V, S>where K: Sync, S: Sync, V: Sync,

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### impl<'a, K, V, S> Sync for RawEntryBuilder<'a, K, V, S>where K: Sync, S: Sync, V: Sync,

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### impl<'a, K, V, S> Unpin for RawEntryBuilder<'a, K, V, S>

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### impl<'a, K, V, S> UnwindSafe for RawEntryBuilder<'a, K, V, S>where K: RefUnwindSafe, S: RefUnwindSafe, V: RefUnwindSafe,

## Blanket Implementations§

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### impl<T> Any for Twhere 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 Twhere 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 Twhere 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<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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### impl<T, U> Into<U> for Twhere 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, U> TryFrom<U> for Twhere 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 Twhere 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.