private static bool TryNonExclusiveQueryEnumeratedParent( out ELNode foundNode, out ELNodeEnumerator enumerator, object key, LogicVariable v, ELNodeEnumerator parentEnumerator) { // Enumerated parent path // NonUniqueParent/Something foundNode = null; if (v == null) { // NonUniqueParent/Key // Enumerate parent, then do deterministic lookup for child. enumerator = new ELNodeEnumeratorFixedChildFromParentEnumerator(parentEnumerator, key); return true; } if (parentEnumerator.BindsVar(v)) { // We're doing a search for a variable that's aready bound. enumerator = new ELNodeEnumeratorPreboundVariable(parentEnumerator, v, false); return true; } // NonUniqueParent/Variable // Enumerate both parent and child. enumerator = new ELNodeEnumeratorLogicVariableFromParentEnumerator(parentEnumerator, v); return true; }