Enum scyllax::maybe_unset::MaybeUnset
source · pub enum MaybeUnset<V> {
Unset,
Set(V),
}
Expand description
A wrapper around a value that can be unincluded but not overwritten/made null
Variants§
Trait Implementations§
source§impl<V: Clone> Clone for MaybeUnset<V>
impl<V: Clone> Clone for MaybeUnset<V>
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: Debug> Debug for MaybeUnset<V>
impl<V: Debug> Debug for MaybeUnset<V>
source§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: Value> From<V> for MaybeUnset<V>
impl<V: Value> From<V> for MaybeUnset<V>
source§impl<V: PartialEq> PartialEq for MaybeUnset<V>
impl<V: PartialEq> PartialEq for MaybeUnset<V>
source§fn eq(&self, other: &MaybeUnset<V>) -> bool
fn eq(&self, other: &MaybeUnset<V>) -> bool
This method tests for
self
and other
values to be equal, and is used
by ==
.source§impl<V: SerializeCql> SerializeCql for MaybeUnset<V>
impl<V: SerializeCql> SerializeCql for MaybeUnset<V>
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> Value for MaybeUnset<V>
impl<V: Value> Value for MaybeUnset<V>
impl<V: Copy> Copy for MaybeUnset<V>
impl<V> StructuralPartialEq for MaybeUnset<V>
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> 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