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>> { ... }
}

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>

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>

Gets the value out of the Option, or inserts the value returned by the given function if the Option is empty.

fn as_mut(&mut self) -> Option<Self::Mut<'_, T>>

Attempts to write the inner value of the Option.

Object Safety

This trait is not object safe.

Implementors

impl<T, W> WritableOptionExt<T> for W

where T: 'static, W: Writable<Target = Option<T>>,