Enum ModalSystem 

pub enum ModalSystem {
    K,
    T,
    S4,
    S5,
    D,
    B,
}

Modal logic axiom systems.

Variants

K

K - Basic modal logic (weakest normal modal logic)

T

T - Reflexive modal logic (K + reflexivity)

S4

S4 - Transitive modal logic (T + transitivity)

S5

S5 - Euclidean modal logic (S4 + symmetry/Euclidean property)

D

D - Deontic logic (K + seriality: □p → ◇p)

B

B - Symmetric modal logic (T + symmetry: p → □◇p)

Implementations

impl ModalSystem

pub fn axioms(&self) -> Vec<&'static str>

Get all axioms that this system satisfies.

pub fn has_axiom(&self, axiom: &str) -> bool

Check if this system includes a specific axiom.

pub fn description(&self) -> &'static str

Get a description of this modal system.

Trait Implementations

impl Clone for ModalSystem

fn clone(&self) -> ModalSystem

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ModalSystem

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

Formats the value using the given formatter.

impl Hash for ModalSystem

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 ModalSystem

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

impl Eq for ModalSystem

impl StructuralPartialEq for ModalSystem