Struct NaryRulePattern 

pub struct NaryRulePattern {
    pub head_arity: u8,
    pub body: Vec<BodyAtomPattern>,
}

A canonical n-ary rule pattern: H(h0..h{a-1}) :- body....

Fields

head_arity: u8

body: Vec<BodyAtomPattern>

Implementations

impl NaryRulePattern

pub fn validate( &self, candidate_arities: &[u8], config: &NaryEnumerationConfig, ) -> Result<()>

Validate canonical form against a head arity, the candidate arity table and the enumeration bounds.

The checks, in refusal order:

1. structural: nonzero head arity, nonempty body, body length bound;
2. per-atom: known candidate slot, binding length == declared arity;
3. variable legality: Head(i) < head_arity, join count bound;
4. canonical join numbering (dense, first-appearance order);
5. range restriction: every head position bound somewhere in the body — a head position no body atom touches cannot be scored by coverage and is refused as an unsafe variable rather than scored vacuously.

Trait Implementations

impl Clone for NaryRulePattern

fn clone(&self) -> NaryRulePattern

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NaryRulePattern

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

Formats the value using the given formatter.

impl Eq for NaryRulePattern

impl Hash for NaryRulePattern

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 NaryRulePattern

fn eq(&self, other: &NaryRulePattern) -> 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 StructuralPartialEq for NaryRulePattern