Struct INTERN 

pub struct INTERN { /* private fields */ }

Methods from Deref<Target = ThreadedRodeo>

pub fn get_or_intern<T>(&self, val: T) -> K

where T: AsRef<str>,

Get the key for a string, interning it if it does not yet exist

Panics

Panics if the key’s try_from_usize function fails. With the default keys, this means that you’ve interned more strings than it can handle. (For Spur this means that u32::MAX - 1 unique strings were interned)

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

// Interned the string
let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

// No string was interned, as it was already contained
let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

pub fn try_get_or_intern<T>(&self, val: T) -> Result<K, LassoError>

where T: AsRef<str>,

Get the key for a string, interning it if it does not yet exist

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

// Interned the string
let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

// No string was interned, as it was already contained
let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

pub fn get_or_intern_static(&self, string: &'static str) -> K

Get the key for a static string, interning it if it does not yet exist

This will not reallocate or copy the given string but will instead just store it

Panics

Panics if the key’s try_from_usize function fails. With the default keys, this means that you’ve interned more strings than it can handle. (For Spur this means that u32::MAX - 1 unique strings were interned)

Example

use lasso::ThreadedRodeo;

let mut rodeo = ThreadedRodeo::default();

// Interned the string
let key = rodeo.get_or_intern_static("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

// No string was interned, as it was already contained
let key = rodeo.get_or_intern_static("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

pub fn try_get_or_intern_static( &self, string: &'static str, ) -> Result<K, LassoError>

Get the key for a static string, interning it if it does not yet exist

This will not reallocate and copy the given string but will instead just store it

Example

use lasso::ThreadedRodeo;

let mut rodeo = ThreadedRodeo::default();

// Interned the string
let key = rodeo.try_get_or_intern_static("Strings of things with wings and dings").unwrap();
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

// No string was interned, as it was already contained
let key = rodeo.try_get_or_intern_static("Strings of things with wings and dings").unwrap();
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

pub fn get<T>(&self, val: T) -> Option<K>

where T: AsRef<str>,

Get the key value of a string, returning None if it doesn’t exist

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!(Some(key), rodeo.get("Strings of things with wings and dings"));

assert_eq!(None, rodeo.get("This string isn't interned"));

pub fn contains<T>(&self, val: T) -> bool

where T: AsRef<str>,

Returns true if the given string has been interned

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert!(rodeo.contains("Strings of things with wings and dings"));

assert!(!rodeo.contains("This string isn't interned"));

pub fn contains_key(&self, key: &K) -> bool

Returns true if the given key exists in the current interner

Example

use lasso::ThreadedRodeo;

let mut rodeo = ThreadedRodeo::default();

let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert!(rodeo.contains_key(&key));

assert!(!rodeo.contains_key(&key_that_doesnt_exist));

pub fn resolve<'a>(&'a self, key: &K) -> &'a str

Resolves a string by its key. Only keys made by the current ThreadedRodeo may be used

Panics

Panics if the key is out of bounds

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!("Strings of things with wings and dings", rodeo.resolve(&key));

pub fn try_resolve<'a>(&'a self, key: &K) -> Option<&'a str>

Resolves a string by its key, returning None if it is out of bounds. Only keys made by the current ThreadedRodeo may be used

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();

let key = rodeo.get_or_intern("Strings of things with wings and dings");
assert_eq!(Some("Strings of things with wings and dings"), rodeo.try_resolve(&key));

pub fn len(&self) -> usize

Gets the number of interned strings

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();
rodeo.get_or_intern("Documentation often has little hidden bits in it");

assert_eq!(rodeo.len(), 1);

pub fn is_empty(&self) -> bool

Returns true if there are no currently interned strings

Example

use lasso::ThreadedRodeo;

let rodeo = ThreadedRodeo::default();
assert!(rodeo.is_empty());

pub fn capacity(&self) -> usize

Returns the number of strings that can be interned without a reallocation

This is an unreliable measurement since the underlying hashmap is unreliable in its capacity measurement

Example

use lasso::{Spur, Capacity, ThreadedRodeo};

let rodeo: ThreadedRodeo<Spur> = ThreadedRodeo::with_capacity(Capacity::for_strings(10));
assert_eq!(rodeo.capacity(), 10);

pub fn iter(&self) -> Iter<'_, K, S>

Returns an iterator over the interned strings and their key values

pub fn strings(&self) -> Strings<'_, K, S>

Returns an iterator over the interned strings

pub fn set_memory_limits(&self, memory_limits: MemoryLimits)

Set the ThreadedRodeo’s maximum memory usage while in-flight

Note that setting the maximum memory usage to below the currently allocated memory will do nothing

pub fn current_memory_usage(&self) -> usize

Get the ThreadedRodeo’s currently allocated memory

pub fn max_memory_usage(&self) -> usize

Get the ThreadedRodeo’s current maximum of allocated memory

Trait Implementations

impl Deref for INTERN

type Target = ThreadedRodeo

The resulting type after dereferencing.

fn deref(&self) -> &ThreadedRodeo

Dereferences the value.

impl LazyStatic for INTERN