Enum EngineLogicNode 

pub enum EngineLogicNode {
    Predicate((String, Vec<LogicalTerm>)),
    ComputeNode((String, Vec<LogicalTerm>)),
    AndNode((u32, u32)),
    OrNode((u32, u32)),
    NotNode(u32),
    ExistsNode((String, u32)),
    ForAllNode((String, u32)),
    PastNode(u32),
    PresentNode(u32),
    FutureNode(u32),
    ObligatoryNode(u32),
    PermittedNode(u32),
    CountNode((String, u32, u32)),
}

A node in the flat logic graph. Each variant corresponds to an FOL constructor. Nodes reference children by u32 index into the LogicBuffer.nodes array.

Variants

Predicate((String, Vec<LogicalTerm>))

Ground or quantified predicate. Fields: (relation-name, argument-terms).

ComputeNode((String, Vec<LogicalTerm>))

A predicate dispatched to an external compute backend for evaluation.

AndNode((u32, u32))

Conjunction: left ∧ right. Fields: (left-node-id, right-node-id).

OrNode((u32, u32))

Disjunction: left ∨ right. Fields: (left-node-id, right-node-id).

NotNode(u32)

Negation: ¬inner. Payload: inner-node-id.

ExistsNode((String, u32))

Existential quantifier: ∃var. body. Fields: (variable-name, body-node-id).

ForAllNode((String, u32))

Universal quantifier: ∀var. body. Fields: (variable-name, body-node-id).

PastNode(u32)

Past tense wrapper (pu). Payload: inner-node-id.

PresentNode(u32)

Present tense wrapper (ca). Payload: inner-node-id.

FutureNode(u32)

Future tense wrapper (ba). Payload: inner-node-id.

ObligatoryNode(u32)

Deontic obligation wrapper (ei/bilga). Payload: inner-node-id.

PermittedNode(u32)

Deontic permission wrapper (e’e/curmi). Payload: inner-node-id.

CountNode((String, u32, u32))

Exactly N entities satisfy the body. Fields: (variable-name, count, body-node-id).

Trait Implementations

impl Clone for LogicNode

fn clone(&self) -> LogicNode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LogicNode

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LogicNode

fn deserialize<__D>( __deserializer: __D, ) -> Result<LogicNode, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LogicNode

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for LogicNode

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for LogicNode