File size: 3,642 Bytes
80d7559 | 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 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 | // CARRY Answer Set Programming (ASP) Constraint Engine
// Declarative constraint solver evaluating system rules over the quantum governance graph.
use std::collections::HashSet;
/// ASP Atom / Fact representations.
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum ASPFact {
Qubit(String),
Entangled(String, String),
Agent(String),
Controls(String, String), // controls(Agent, Qubit)
Partner(String, String), // partner(Agent1, Agent2)
TopologyModel(String),
}
/// Result of ASP Solver Evaluation.
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum ASPSolverResult {
SAT { facts_count: usize, rules_evaluated: usize },
UNSAT { violated_rule: String, details: String },
}
/// ASP Constraint Solver Engine.
pub struct ASPEngine {
pub facts: HashSet<ASPFact>,
pub rules_evaluated: usize,
}
impl ASPEngine {
pub fn new() -> Self {
Self {
facts: HashSet::new(),
rules_evaluated: 0,
}
}
pub fn add_fact(&mut self, fact: ASPFact) {
self.facts.insert(fact);
}
/// Evaluate declarative ASP integrity constraints over the registered facts.
pub fn solve(&mut self) -> ASPSolverResult {
self.rules_evaluated = 0;
// Rule 1: :- controls(A, Q), not qubit(Q).
self.rules_evaluated += 1;
for fact in &self.facts {
if let ASPFact::Controls(agent, qubit) = fact {
let qubit_exists = self.facts.contains(&ASPFact::Qubit(qubit.clone()));
if !qubit_exists {
return ASPSolverResult::UNSAT {
violated_rule: ":- controls(A,Q), not qubit(Q).".to_string(),
details: format!("Agent {} controls unknown qubit {}", agent, qubit),
};
}
}
}
// Rule 2: :- entangled(Q1, Q2), Q1 = Q2.
self.rules_evaluated += 1;
for fact in &self.facts {
if let ASPFact::Entangled(q1, q2) = fact {
if q1 == q2 {
return ASPSolverResult::UNSAT {
violated_rule: ":- entangled(Q1,Q2), Q1 = Q2.".to_string(),
details: format!("Self-entanglement on qubit {}", q1),
};
}
}
}
// Rule 3: :- partner(A, B), A = B.
self.rules_evaluated += 1;
for fact in &self.facts {
if let ASPFact::Partner(a, b) = fact {
if a == b {
return ASPSolverResult::UNSAT {
violated_rule: ":- partner(A,B), A = B.".to_string(),
details: format!("Agent {} cannot be partner to itself", a),
};
}
}
}
// Rule 4: :- controls(A, Q), not agent(A).
self.rules_evaluated += 1;
for fact in &self.facts {
if let ASPFact::Controls(agent, _) = fact {
let agent_exists = self.facts.contains(&ASPFact::Agent(agent.clone()));
if !agent_exists {
return ASPSolverResult::UNSAT {
violated_rule: ":- controls(A,Q), not agent(A).".to_string(),
details: format!("Unknown agent {} declared control over qubit", agent),
};
}
}
}
ASPSolverResult::SAT {
facts_count: self.facts.len(),
rules_evaluated: self.rules_evaluated,
}
}
}
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