Enum TruthValue 

pub enum TruthValue {
    Free = 0,
    True = 1,
    False = 2,
}

Represents three-valued truth values.

Variants

Free = 0

No truth value

True = 1

True

False = 2

False

Trait Implementations

impl Clone for TruthValue

fn clone(&self) -> TruthValue

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TruthValue

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

Formats the value using the given formatter.

impl PartialEq for TruthValue

fn eq(&self, other: &TruthValue) -> 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 TruthValue

impl StructuralPartialEq for TruthValue