Trait AppStateTrait

Source

pub trait AppStateTrait<T, U>where
    T: 'static + Send,
    U: 'static + AppStateTrait<T, U> + CreateAppState<T> + Clone + Send,{
    // Provided methods
    fn init(state: T) { ... }
    fn init_if_not_exists<F: FnOnce() -> T>(state: F) { ... }
    fn get() -> U { ... }
    fn try_get() -> Result<U, Box<dyn Error>> { ... }
    fn get_or_insert(val: T) -> U { ... }
    fn get_or_insert_with<F: FnOnce() -> T>(f: F) -> U { ... }
    fn get_or_insert_default() -> U
       where T: Default { ... }
}

Provided Methods§

Source

fn init(state: T)

Initializes the state store with the given state. If the state store has already been initialized, this will overwrite the existing state.

§Examples

use app_state::{AppState, AppStateTrait};

struct MyState {
  counter: u32,
}

fn main() {
  let state = MyState { counter: 0 };
  AppState::init(state);
}

Source

fn init_if_not_exists<F: FnOnce() -> T>(state: F)

Initializes the state store with the given state. If the state store has already been initialized, this will do nothing. This is useful for initializing the state store with a default state. If you want to overwrite the existing state, use init instead.

§Examples

use app_state::{AppState, AppStateTrait};

struct MyState {
  counter: u32,
}

fn main() {
  AppState::init_if_not_exists(|| MyState { counter: 0 });
}

Source