Enum Reason 

pub enum Reason {
    Decision,
    Unit(usize),
    Clause(usize),
}

The reason for a literal being in the trail.

This enum specifies why a particular literal was assigned.

Variants

Decision

The literal was assigned as a decision by the solver.

Unit(usize)

The literal was assigned because it was part of an initial unit clause. The usize stores the index of this unit clause in the original clause database.

Clause(usize)

The literal was assigned due to an implication from another clause. The usize stores the index of the implying clause.

Trait Implementations

impl Clone for Reason

fn clone(&self) -> Reason

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Reason

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

Formats the value using the given formatter.

impl Default for Reason

fn default() -> Reason

Returns the “default value” for a type.

impl Hash for Reason

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 Reason

fn cmp(&self, other: &Reason) -> 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 Reason

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

fn partial_cmp(&self, other: &Reason) -> 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 Reason

impl Eq for Reason

impl StructuralPartialEq for Reason