Struct NullParamStore 

pub struct NullParamStore;

No-op store: the default when persistence is disabled.

Trait Implementations

impl Clone for NullParamStore

fn clone(&self) -> NullParamStore

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for NullParamStore

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for NullParamStore

fn default() -> NullParamStore

Returns the “default value” for a type.

impl ParamStore for NullParamStore

fn load(&self, _apply: &mut dyn FnMut(&str, ParameterValue))

Apply each persisted (name, value) via apply. Called once at boot after defaults are declared, so persisted values override them.

fn save( &mut self, _params: &mut dyn Iterator<Item = (&str, &ParameterValue)>, ) -> Result<(), ParamStoreError>

Persist the full current parameter set. params yields (name, value) for every declared parameter; called after a runtime set changes a value. Non-scalar values (arrays, NotSet) are backend-defined and may be skipped.

impl Copy for NullParamStore