Enum VarState 

pub enum VarState {
    Unassigned,
    Assigned(bool),
}

Represents the assignment state of a propositional variable.

A variable can be unassigned, or assigned to true or false.

Variants

Unassigned

The variable has not been assigned a truth value.

Assigned(bool)

The variable has been assigned a specific truth value.

Implementations

impl VarState

pub const fn is_assigned(self) -> bool

Checks if the variable state is Assigned.

Returns

true if the variable is assigned (either true or false), false otherwise.

pub const fn is_unassigned(self) -> bool

Checks if the variable state is Unassigned.

Returns

true if the variable is unassigned, false otherwise.

pub const fn is_true(self) -> bool

Checks if the variable state is Assigned(true).

Returns

true if the variable is assigned true, false otherwise.

pub const fn is_false(self) -> bool

Checks if the variable state is Assigned(false).

Returns

true if the variable is assigned false, false otherwise.

Trait Implementations

impl Clone for VarState

fn clone(&self) -> VarState

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VarState

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

Formats the value using the given formatter.

impl Default for VarState

fn default() -> VarState

Returns the “default value” for a type.

impl From<Option<bool>> for VarState

fn from(b: Option<bool>) -> Self

Converts an Option<bool> into a VarState.

Some(b) converts to VarState::Assigned(b). None converts to VarState::Unassigned.

impl From<VarState> for Option<bool>

fn from(s: VarState) -> Self

Converts a VarState into an Option<bool>.

VarState::Assigned(b) converts to Some(b). VarState::Unassigned converts to None.

impl Hash for VarState

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for VarState

fn cmp(&self, other: &VarState) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for VarState

fn eq(&self, other: &VarState) -> 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 PartialOrd for VarState

fn partial_cmp(&self, other: &VarState) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Copy for VarState

impl Eq for VarState

impl StructuralPartialEq for VarState