enum Presence {
Missing,
Present,
}
Variants
Missing
Present
Auto Trait Implementations
impl RefUnwindSafe for Presence
impl Send for Presence
impl Sync for Presence
impl Unpin for Presence
impl UnwindSafe for Presence
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more