Struct MemoryPreferences 

pub struct MemoryPreferences { /* private fields */ }

An in-memory store. The web default until a platform backend registers, and what tests use.

Implementations

impl MemoryPreferences

pub fn new() -> Self

An empty store.

Trait Implementations

impl Default for MemoryPreferences

fn default() -> MemoryPreferences

Returns the “default value” for a type.

impl PreferencesStore for MemoryPreferences

fn get(&self, key: &str) -> Option<String>

Reads key, or None when it has never been written.

fn set(&self, key: &str, value: &str) -> Result<(), PreferencesError>

Writes key.

fn remove(&self, key: &str) -> Result<(), PreferencesError>

Removes key. Succeeds if it is already absent.

fn keys(&self) -> Vec<String>

Every key currently stored, in sorted order.

fn clear(&self) -> Result<(), PreferencesError>

Removes everything.