Struct DynamicPool 

pub struct DynamicPool { /* private fields */ }

Interns unique strings and assigns each a u16 index. Index 0 is reserved as null.

Implementations

impl DynamicPool

pub fn new() -> Self

pub fn intern(&mut self, s: &str) -> u16

Interns a string and returns its index.

Examples

use state_engine::common::pool::DynamicPool;

let mut pool = DynamicPool::new();
let i0 = pool.intern("foo");
let i1 = pool.intern("bar");

// same string returns same index
assert_eq!(pool.intern("foo"), i0);
assert_ne!(i0, i1);

// index 0 is reserved as null
assert_ne!(i0, 0);

pub fn get(&self, index: u16) -> Option<&str>

Returns the string at the given index, or None if out of range.

Examples

use state_engine::common::pool::DynamicPool;

let mut pool = DynamicPool::new();
let i0 = pool.intern("foo");
assert_eq!(pool.get(i0), Some("foo"));
assert_eq!(pool.get(0), Some(""));  // null slot
assert_eq!(pool.get(999), None);

Trait Implementations

impl Default for DynamicPool

fn default() -> Self

Returns the “default value” for a type.