Struct KeyHasher 

pub struct KeyHasher(/* private fields */);

👎Deprecated since 0.24.4:

Use metrics-util::common::KeyHasher instead.

Key-specific hashing algorithm.

Deprecated in favor of a no-hash based implementation in metrics-util::common::KeyHasher.

This hasher operates in two modes. When only write_u64 is called — the path taken by Key’s Hash impl, which writes the pre-computed key hash via write_u64(self.hash) — finish returns that value verbatim, matching Hashable::hashable(&key) and the no-op metrics_util::common::KeyHasher. When arbitrary bytes are written via write (or any of the typed write_* methods that route through write), this hasher falls back to hashing with rapidhash - https://github.com/hoxxep/rapidhash - preserving the previous byte-hashing behavior for callers like metrics_util::DefaultHashable<H> in metrics-util 0.19.x.

Trait Implementations

impl Debug for KeyHasher

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

Formats the value using the given formatter.

impl Default for KeyHasher

fn default() -> Self

Returns the “default value” for a type.

impl Hasher for KeyHasher

fn finish(&self) -> u64

Returns the hash value for the values written so far.

fn write(&mut self, bytes: &[u8])

Writes some data into this Hasher.

fn write_u64(&mut self, i: u64)

Writes a single u64 into this hasher.

fn write_u8(&mut self, i: u8)

Writes a single u8 into this hasher.

fn write_u16(&mut self, i: u16)

Writes a single u16 into this hasher.

fn write_u32(&mut self, i: u32)

Writes a single u32 into this hasher.

fn write_u128(&mut self, i: u128)

Writes a single u128 into this hasher.

fn write_usize(&mut self, i: usize)

Writes a single usize into this hasher.

fn write_i8(&mut self, i: i8)

Writes a single i8 into this hasher.

fn write_i16(&mut self, i: i16)

Writes a single i16 into this hasher.

fn write_i32(&mut self, i: i32)

Writes a single i32 into this hasher.

fn write_i64(&mut self, i: i64)

Writes a single i64 into this hasher.

fn write_i128(&mut self, i: i128)

Writes a single i128 into this hasher.

fn write_isize(&mut self, i: isize)

Writes a single isize into this hasher.

fn write_length_prefix(&mut self, len: usize)

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

Writes a length prefix into this hasher, as part of being prefix-free.

fn write_str(&mut self, s: &str)

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

Writes a single str into this hasher.