message: adding a few forgotten empty impls to AllGateVisitor
diff: @@ -93,6 +93,12 @@ public:
  void visit(CRZ &crz) override {}
  void visit(CH &ch) override {}
  void visit(S &s) override {}
  + void visit(CPhase& cp) override {}
  +
  + void visit(Measure& cp) override {}
  + void visit(Identity& cp) override {}
  + void visit(U& cp) override {}
  +
  void visit(Sdg &sdg) override {}
  void visit(T &t) override {}
  void visit(Tdg &tdg) override {}
  