Struct FilePreferences 

pub struct FilePreferences { /* private fields */ }

The framework’s file-backed store: one line per entry, key=value with the value percent-escaped so newlines and equals signs round-trip.

Implementations

impl FilePreferences

pub fn new() -> Self

A store that loads lazily from the application’s config directory.

Trait Implementations

impl Default for FilePreferences

Available on non-WebAssembly only.

fn default() -> Self

Returns the “default value” for a type.

impl PreferencesStore for FilePreferences

Available on non-WebAssembly only.

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.