Struct StateValueList 

pub struct StateValueList { /* private fields */ }

Stores state value records (u32) and their associated serde_json::Value payloads. Index 0 is reserved as null.

Implementations

impl StateValueList

pub fn new() -> Self

pub fn push(&mut self, key_index: u16, value: Value) -> u16

Appends a state record and its value, returning the record index.

Examples

use state_engine::common::pool::{StateValueList, STATE_OFFSET_KEY, STATE_MASK_KEY, STATE_OFFSET_VALUE, STATE_MASK_VALUE, state_get};
use serde_json::json;

let mut list = StateValueList::new();
let idx = list.push(42, json!("hello"));

let record = list.get_record(idx).unwrap();
assert_eq!(state_get(record, STATE_OFFSET_KEY, STATE_MASK_KEY), 42);

let value = list.get_value(idx).unwrap();
assert_eq!(value, &json!("hello"));

pub fn update(&mut self, index: u16, value: Value) -> bool

Updates the value at the given record index.

pub fn remove(&mut self, index: u16) -> bool

Removes a record by zeroing it (index remains valid, value becomes Null).

pub fn get_record(&self, index: u16) -> Option<StateRecord>

pub fn get_value(&self, index: u16) -> Option<&Value>

Trait Implementations

impl Default for StateValueList

fn default() -> Self

Returns the “default value” for a type.