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[app] Add egui::app::DummyStorage

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This commit is contained in:
Emil Ernerfeldt
2020-10-19 20:12:14 +02:00
parent 7f8564b27a
commit 43813a71eb
1 changed files with 11 additions and 0 deletions
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11
egui/src/app.rs
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@@ -77,6 +77,17 @@ pub trait Storage {
fn set_string(&mut self, key: &str, value: String); fn set_string(&mut self, key: &str, value: String);
} }
/// Stores nothing.
#[derive(Clone, Default)]
pub struct DummyStorage {}
impl Storage for DummyStorage {
fn get_string(&self, _key: &str) -> Option<&str> {
None
}
fn set_string(&mut self, _key: &str, _value: String) {}
}
#[cfg(feature = "serde_json")] #[cfg(feature = "serde_json")]
pub fn get_value<T: serde::de::DeserializeOwned>(storage: &dyn Storage, key: &str) -> Option<T> { pub fn get_value<T: serde::de::DeserializeOwned>(storage: &dyn Storage, key: &str) -> Option<T> {
storage storage