Struct polars_core::hashing::BytesHash

pub struct BytesHash<'a> { /* private fields */ }

Contains a ptr to the string slice an the precomputed hash of that string. During rehashes, we will rehash the hash instead of the string, that makes rehashing cheap and allows cache coherent small hash tables.

Implementations

impl<'a> BytesHash<'a>

pub fn new(s: Option<&'a [u8]>, hash: u64) -> Self

Trait Implementations

impl<'a> AsU64 for BytesHash<'a>

fn as_u64(self) -> u64

impl<'a> Clone for BytesHash<'a>

fn clone(&self) -> BytesHash<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for BytesHash<'a>

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

Formats the value using the given formatter.

impl<'a> Hash for BytesHash<'a>

fn hash<H: Hasher>(&self, state: &mut H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<'a> PartialEq for BytesHash<'a>

fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.

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.

impl<'a> Copy for BytesHash<'a>

impl<'a> Eq for BytesHash<'a>

impl<'a> StructuralEq for BytesHash<'a>