pub struct None {}
Trait Implementations§
impl API for None
impl Eq for None
impl StructuralPartialEq for None
Auto Trait Implementations§
impl Freeze for None
impl RefUnwindSafe for None
impl Send for None
impl Sync for None
impl Unpin for None
impl UnwindSafe for None
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more