Enum scylla::frame::value::MaybeUnset
source · pub enum MaybeUnset<V> {
Unset,
Set(V),
}Expand description
Enum providing a way to represent a value that might be unset
Variants§
Trait Implementations§
source§impl<V> Clone for MaybeUnset<V>where
V: Clone,
impl<V> Clone for MaybeUnset<V>where
V: Clone,
source§fn clone(&self) -> MaybeUnset<V>
fn clone(&self) -> MaybeUnset<V>
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 moresource§impl<V> Default for MaybeUnset<V>
impl<V> Default for MaybeUnset<V>
source§fn default() -> MaybeUnset<V>
fn default() -> MaybeUnset<V>
Returns the “default value” for a type. Read more
source§impl<V> SerializeValue for MaybeUnset<V>where
V: SerializeValue,
impl<V> SerializeValue for MaybeUnset<V>where
V: SerializeValue,
source§fn serialize<'b>(
&self,
typ: &ColumnType<'_>,
writer: CellWriter<'b>,
) -> Result<WrittenCellProof<'b>, SerializationError>
fn serialize<'b>( &self, typ: &ColumnType<'_>, writer: CellWriter<'b>, ) -> Result<WrittenCellProof<'b>, SerializationError>
Serializes the value to given CQL type. Read more
source§impl<V> Value for MaybeUnset<V>where
V: Value,
impl<V> Value for MaybeUnset<V>where
V: Value,
impl<V> Copy for MaybeUnset<V>where
V: Copy,
Auto Trait Implementations§
impl<V> Freeze for MaybeUnset<V>where
V: Freeze,
impl<V> RefUnwindSafe for MaybeUnset<V>where
V: RefUnwindSafe,
impl<V> Send for MaybeUnset<V>where
V: Send,
impl<V> Sync for MaybeUnset<V>where
V: Sync,
impl<V> Unpin for MaybeUnset<V>where
V: Unpin,
impl<V> UnwindSafe for MaybeUnset<V>where
V: UnwindSafe,
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: Copy,
impl<T> CloneToUninit for Twhere
T: Copy,
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)source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
source§default unsafe fn clone_to_uninit(&self, dst: *mut T)
default unsafe fn clone_to_uninit(&self, dst: *mut T)
🔬This is a nightly-only experimental API. (
clone_to_uninit)source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
fn into_either(self, into_left: bool) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left is true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
Converts
self into a Left variant of Either<Self, Self>
if into_left(&self) returns true.
Converts self into a Right variant of Either<Self, Self>
otherwise. Read more