Struct FallbackConfig 

pub struct FallbackConfig<S: Config, F: Config>(/* private fields */);

Represents a copy-on-write config source that wraps two other sources, a read-write config and a read-only fallback config.

The config variables are connected to both sources, if the read-write config is not set the var will update with the fallback config, if it is set it will sync with the read-write config.

The FallbackConfig type is an Arc internally, so you can keep a cloned reference to it after moving it into CONFIG or another combinator config.

Implementations

impl<S: Config, F: Config> FallbackConfig<S, F>

pub fn new(source: S, fallback: F) -> Self

New from write source and fallback source.

Trait Implementations

impl<S: AnyConfig, F: AnyConfig> AnyConfig for FallbackConfig<S, F>

fn status(&self) -> Var<ConfigStatus>

Gets a read-only variable that represents the IO status of the config.

fn get_raw( &mut self, key: ConfigKey, default: RawConfigValue, insert: bool, ) -> Var<RawConfigValue>

Gets a weak typed variable to the config key.

fn contains_key(&mut self, key: ConfigKey) -> Var<bool>

Gets a read-only variable that tracks if an entry for the key is in the backing storage.

fn remove(&mut self, key: &ConfigKey) -> bool

Removes the key from the backing storage.

fn low_memory(&mut self)

Cleanup and flush RAM caches.

impl<S: AnyConfig, F: AnyConfig> FallbackConfigReset for FallbackConfig<S, F>

fn reset(&self, key: &ConfigKey)

Removes the key from the config source and reverts all active variables to the fallback source.

fn can_reset(&self, key: ConfigKey) -> Var<bool>

Gets if the config source contains the key.

fn clone_boxed(&self) -> Box<dyn FallbackConfigReset>

Clone a reference to the config.