Struct Interner 

pub struct Interner { /* private fields */ }

Thread-safe string interner — maps Arc<str> ↔ u32 IDs.

Interning replaces repeated Arc<str> pointers (16 bytes each) with 4-byte u32 IDs. The same string always maps to the same ID for the lifetime of this interner.

Concurrency

• Fast path (already interned): lock-free read from the DashMap.
• Slow path (new string): acquires a RwLock write guard, re-checks under the lock to handle races, then assigns an ID atomically.
• get(id) acquires a read guard; multiple concurrent readers are allowed.

Implementations

impl Interner

pub fn intern(&self, s: Arc<str>) -> u32

Intern s and return its ID. Idempotent: the same string always returns the same ID.

pub fn intern_str(&self, s: &str) -> u32

Intern from a &str without allocating an Arc when the string is already interned.

pub fn get(&self, id: u32) -> Arc<str>

Resolve an ID back to its string. Panics if id is out of range.

pub fn get_id(&self, s: &str) -> Option<u32>

Return the ID for s if it has already been interned, or None.

Trait Implementations

impl Debug for Interner

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

Formats the value using the given formatter.

impl Default for Interner

fn default() -> Interner

Returns the “default value” for a type.