Struct KeyPart 

pub struct KeyPart { /* private fields */ }

A single component of a cache key.

Each part represents a key-value pair extracted from a request. The value is optional - some parts may be key-only (flags).

String Optimization

Both key and value use SmolStr which stores small strings (≤23 bytes) inline without heap allocation. This is efficient for typical cache key components like “method”, “path”, “GET”, etc.

Example

use hitbox_core::KeyPart;

// Key with value
let method = KeyPart::new("method", Some("GET"));
assert_eq!(method.key(), "method");
assert_eq!(method.value(), Some("GET"));

// Key without value (flag)
let flag = KeyPart::new("cached", None::<&str>);
assert_eq!(flag.key(), "cached");
assert_eq!(flag.value(), None);

Implementations

impl KeyPart

pub fn new<K, V>(key: K, value: Option<V>) -> KeyPart

where K: AsRef<str>, V: AsRef<str>,

Creates a new key part.

Arguments

• key - The key name
• value - Optional value associated with the key

pub fn key(&self) -> &str

Returns the key name.

pub fn value(&self) -> Option<&str>

Returns the optional value.

pub fn with_key(self, key: impl AsRef<str>) -> KeyPart

Returns a new KeyPart with the key replaced, keeping the value.

pub fn prefixed(self, prefix: impl AsRef<str>) -> KeyPart

Returns a new KeyPart with the key prefixed by prefix..

For example, KeyPart("id", "42").prefixed("user") produces KeyPart("user.id", "42").

Trait Implementations

impl Clone for KeyPart

fn clone(&self) -> KeyPart

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for KeyPart

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for KeyPart

fn deserialize<__D>( __deserializer: __D, ) -> Result<KeyPart, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for KeyPart

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

Formats the value using the given formatter.

impl Hash for KeyPart

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

where __H: Hasher,

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 PartialEq for KeyPart

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

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for KeyPart

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl<'de> Decode<'de> for KeyPart

impl Encode for KeyPart

impl Eq for KeyPart

impl StructuralPartialEq for KeyPart