pub enum ExistenceCheck {
NX,
XX,
}
Expand description
Helper enum that is used to define existence checks
Variants§
NX
NX – Only set the key if it does not already exist.
XX
XX – Only set the key if it already exists.
Trait Implementations§
source§impl Clone for ExistenceCheck
impl Clone for ExistenceCheck
source§fn clone(&self) -> ExistenceCheck
fn clone(&self) -> ExistenceCheck
Returns a copy of the value. Read more
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreimpl Copy for ExistenceCheck
Auto Trait Implementations§
impl Freeze for ExistenceCheck
impl RefUnwindSafe for ExistenceCheck
impl Send for ExistenceCheck
impl Sync for ExistenceCheck
impl Unpin for ExistenceCheck
impl UnwindSafe for ExistenceCheck
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
source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§unsafe fn clone_to_uninit(&self, dst: *mut T)
unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit
)