evaluate method

@override List<Fact> evaluate(Map<String, List<List<Object>>> facts, Map<String, List<List<Object>>> derived)

Evaluates the rule and returns derived facts.

Implementation

@override
List<Fact> evaluate(
  Map<String, List<List<Object>>> facts,
  Map<String, List<List<Object>>> derived,
) {
  final result = <Fact>[];
  final stores = facts['StoreField'] ?? [];
  final pointsTo = getCombined('VarPointsTo', facts, derived);

  for (final store in stores) {
    final baseVar = store[0];
    final field = store[1];
    final sourceVar = store[2];

    // Find what base points to
    for (final basePt in pointsTo) {
      if (basePt[0] == baseVar) {
        final baseHeap = basePt[1];

        // Find what source points to
        for (final sourcePt in pointsTo) {
          if (sourcePt[0] == sourceVar) {
            final targetHeap = sourcePt[1];
            result.add(Fact('HeapPointsTo', [baseHeap, field, targetHeap]));
          }
        }
      }
    }
  }

  return result;
}