varisat 0.2.2

A CDCL based SAT solver (library)
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42

//! Miscellaneous solver state.
use crate::solver::SolverError;

/// Satisfiability state.
#[derive(Copy, Clone, Eq, PartialEq, Debug)]
pub enum SatState {
    Unknown,
    Sat,
    Unsat,
    UnsatUnderAssumptions,
}

impl Default for SatState {
    fn default() -> SatState {
        SatState::Unknown
    }
}

/// Miscellaneous solver state.
///
/// Anything larger or any larger group of related state variables should be moved into a separate
/// part of [`Context`](crate::context::Context).
pub struct SolverState {
    pub sat_state: SatState,
    pub formula_is_empty: bool,
    /// Whether solve was called at least once.
    pub solver_invoked: bool,
    pub state_is_invalid: bool,
    pub solver_error: Option<SolverError>,
}

impl Default for SolverState {
    fn default() -> SolverState {
        SolverState {
            sat_state: SatState::Unknown,
            formula_is_empty: true,
            solver_invoked: false,
            state_is_invalid: false,
            solver_error: None,
        }
    }
}