Enum SolveStatus 

pub enum SolveStatus {
    Sat,
    Unsat,
    Unknown,
    Optimal(u64),
}

Status of a solve operation.

Represents the outcome of a SAT/MaxSAT solver execution.

Variants

• Sat: Instance is satisfiable
• Unsat: Instance is unsatisfiable
• Unknown: Could not determine (timeout/resource limit)
• Optimal: Found optimal solution with given value (MaxSAT)

Example

use xlog_solve::SolveStatus;

let status = SolveStatus::Sat;
assert!(status.is_satisfiable());
assert!(status.is_determined());

let optimal = SolveStatus::Optimal(42);
assert_eq!(optimal.optimal_value(), Some(42));

Variants

Sat

Instance is satisfiable.

A satisfying assignment exists and should be available in the proof.

Unsat

Instance is unsatisfiable.

No assignment can satisfy all clauses.

Unknown

Could not determine satisfiability.

The solver did not reach a definitive conclusion, typically due to:

• Timeout
• Memory limit
• Iteration limit
• Incomplete search (for approximate solvers)

Optimal(u64)

Found optimal solution with given value.

For MaxSAT problems, this indicates the optimal objective value (e.g., maximum number of satisfied clauses or weighted sum).

Implementations

impl SolveStatus

pub fn is_satisfiable(&self) -> bool

Returns true if the status indicates satisfiability.

Returns true for Sat and Optimal.

Example

use xlog_solve::SolveStatus;

assert!(SolveStatus::Sat.is_satisfiable());
assert!(SolveStatus::Optimal(5).is_satisfiable());
assert!(!SolveStatus::Unsat.is_satisfiable());

pub fn is_unsatisfiable(&self) -> bool

Returns true if the status indicates unsatisfiability.

Example

use xlog_solve::SolveStatus;

assert!(SolveStatus::Unsat.is_unsatisfiable());
assert!(!SolveStatus::Sat.is_unsatisfiable());

pub fn is_determined(&self) -> bool

Returns true if the solver reached a definitive conclusion.

Returns true for all variants except Unknown.

Example

use xlog_solve::SolveStatus;

assert!(SolveStatus::Sat.is_determined());
assert!(SolveStatus::Unsat.is_determined());
assert!(SolveStatus::Optimal(5).is_determined());
assert!(!SolveStatus::Unknown.is_determined());

pub fn optimal_value(&self) -> Option<u64>

Returns the optimal value if this is an Optimal status.

Example

use xlog_solve::SolveStatus;

assert_eq!(SolveStatus::Optimal(42).optimal_value(), Some(42));
assert_eq!(SolveStatus::Sat.optimal_value(), None);

Trait Implementations

impl Clone for SolveStatus

fn clone(&self) -> SolveStatus

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SolveStatus

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

Formats the value using the given formatter.

impl Default for SolveStatus

fn default() -> SolveStatus

Returns the “default value” for a type.

impl Hash for SolveStatus

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 PartialEq for SolveStatus

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

impl Eq for SolveStatus

impl StructuralPartialEq for SolveStatus