Enum TruthValue 

pub enum TruthValue {
    True,
    False,
    Unknown,
    Both,
}

Many-valued semantic truth value.

Variants

True

False

Unknown

Both

Implementations

impl TruthValue

pub const fn and(self, other: Self) -> Self

Logical conjunction.

pub const fn or(self, other: Self) -> Self

Logical disjunction.

pub const fn negate(self) -> Self

Logical negation.

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 Copy for TruthValue

impl Debug for TruthValue

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

Formats the value using the given formatter.

impl Eq for TruthValue

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 StructuralPartialEq for TruthValue