Struct MaybeOrderBy 

pub struct MaybeOrderBy(/* private fields */);

The optionality carrier for SortBuilder::by: an absent order skips the field. A local newtype because coherence forbids impl From<…> for Option<_>.

SortOrder, OrderBy, and — via the umbrella impl — Option<T: Into<OrderBy>> all flow in, so a consumer’s Option<MyDir> self-skips on None after one impl From<MyDir> for OrderBy.

Trait Implementations

impl Clone for MaybeOrderBy

fn clone(&self) -> MaybeOrderBy

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MaybeOrderBy

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<T: Into<OrderBy>> From<Option<T>> for MaybeOrderBy

fn from(order: Option<T>) -> Self

Converts to this type from the input type.

impl From<OrderBy> for MaybeOrderBy

fn from(order: OrderBy) -> Self

Converts to this type from the input type.

impl From<SortOrder> for MaybeOrderBy

fn from(order: SortOrder) -> Self

Converts to this type from the input type.