Trait WritableOptionExt
pub trait WritableOptionExt<T>: Writable<Target = Option<T>>where
T: 'static,{
// Provided methods
fn get_or_insert(&mut self, default: T) -> Self::Mut<'_, T> { ... }
fn get_or_insert_with(
&mut self,
default: impl FnOnce() -> T,
) -> Self::Mut<'_, T> { ... }
fn as_mut(&mut self) -> Option<Self::Mut<'_, T>> { ... }
}
Expand description
An extension trait for Writable<Option<T>>
` that provides some convenience methods.
Provided Methods§
fn get_or_insert(&mut self, default: T) -> Self::Mut<'_, T>
fn get_or_insert(&mut self, default: T) -> Self::Mut<'_, T>
Gets the value out of the Option, or inserts the given value if the Option is empty.
fn get_or_insert_with(
&mut self,
default: impl FnOnce() -> T,
) -> Self::Mut<'_, T>
fn get_or_insert_with( &mut self, default: impl FnOnce() -> T, ) -> Self::Mut<'_, T>
Gets the value out of the Option, or inserts the value returned by the given function if the Option is empty.
Dyn Compatibility§
This trait is not dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.