Enum BooleanOperator

pub enum BooleanOperator {
    And,
    AndKleene,
    Or,
    OrKleene,
}

Operations over the nullable Boolean values.

All three operators accept and produce values from the set {true, false, and null}.

Variants

And

Logical and, unless either value is null, in which case the result is null.

A ∧ B		B
		F	U	T
A	F	F	U	F
	U	U	U	U
	T	F	U	T

AndKleene

Kleene (three-valued) logical and.

A ∧ B		B
		F	U	T
A	F	F	F	F
	U	F	U	U
	T	F	U	T

Or

Logical or, unless either value is null, in which case the result is null.

A ∨ B		B
		F	U	T
A	F	F	U	T
	U	U	U	U
	T	T	U	T

OrKleene

Kleene (three-valued) logical or.

A ∨ B		B
		F	U	T
A	F	F	U	T
	U	U	U	T
	T	T	T	T

Trait Implementations

impl Clone for BooleanOperator

fn clone(&self) -> BooleanOperator

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BooleanOperator

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

Formats the value using the given formatter.

impl Options for BooleanOperator

fn as_any(&self) -> &dyn Any

impl PartialEq for BooleanOperator

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

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

const 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 BooleanOperator

impl Eq for BooleanOperator

impl StructuralPartialEq for BooleanOperator