Enum EqualityMode 

pub enum EqualityMode {
    Default,
    SameAs,
}

Equality-reasoning mode under which a Datalog program is validated.

Programs are checked under Self::Default by Program::validate; callers that have an active equality-rewriting regime pass Self::SameAs through Program::validate_with_equality_mode to additionally reject negation and aggregation. The two methods share their other checks (safety, stratification, triple-term nesting).

Variants

Default

No special equality-reasoning regime. All Datalog features — including negation and aggregation — are allowed.

SameAs

The evaluator rewrites terms across equality classes. Negation and aggregation are rejected at validation time because they interact non-monotonically with the rewrite — see the module-level docs.

Trait Implementations

impl Clone for EqualityMode

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for EqualityMode

impl Debug for EqualityMode

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

Formats the value using the given formatter.

impl Default for EqualityMode

fn default() -> Self

Returns the “default value” for a type.

impl Eq for EqualityMode

impl Hash for EqualityMode

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 EqualityMode

fn eq(&self, other: &Self) -> bool

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for EqualityMode