Enum NullOrdering 

pub enum NullOrdering {
    First,
    Last,
    Default,
}

Variants

First

Last

Default

Implementations

impl NullOrdering

pub fn as_bool_option(self) -> Option<bool>

Returns Some(true) for First, Some(false) for Last, None for Default

pub fn is_first(self) -> bool

Returns true if nulls should come first

pub fn is_last(self) -> bool

Returns true if nulls should come last

pub fn is_default(self) -> bool

Returns true if using default null ordering

Trait Implementations

impl Clone for NullOrdering

fn clone(&self) -> NullOrdering

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NullOrdering

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

Formats the value using the given formatter.

impl Default for NullOrdering

fn default() -> NullOrdering

Returns the “default value” for a type.

impl PartialEq for NullOrdering

fn eq(&self, other: &NullOrdering) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for NullOrdering

impl Eq for NullOrdering

impl StructuralPartialEq for NullOrdering