393   KeyedQueue<Family, PushSpec> Sequences; // FIXME: rename => PendingPushes?  member in clang::pseudo::__anonec8d3c1d0411::GLRReduce
412     assert(Sequences.empty());  in operator ()()
416     while (!Sequences.empty()) {  in operator ()()
456         Sequences.emplace(F, PushSpec{N, Seq});  in pop()
489     assert(!Sequences.empty());  in pushNext()
490     Family F = Sequences.top().first;  in pushNext()
502       const PushSpec &Push = Sequences.top().second;  in pushNext()
503       FamilySequences.emplace_back(Sequences.top().first.Rule, *Push.Seq);  in pushNext()
510       Sequences.pop();  in pushNext()
511     } while (!Sequences.empty() && Sequences.top().first == F);  in pushNext()
557     if (!Sequences.empty() || Heads->size() != NextPopHead + 1)  in popAndPushTrivial()