794 struct Emplaceable {  struct
795   EmplaceableArg<0> A0;
796   EmplaceableArg<1> A1;
797   EmplaceableArg<2> A2;
798   EmplaceableArg<3> A3;
799   EmplaceableState State;
801   Emplaceable() : State(ES_Emplaced) {}  in Emplaceable()  argument
804   explicit Emplaceable(A0Ty &&A0)  in Emplaceable()  argument
808   Emplaceable(A0Ty &&A0, A1Ty &&A1)  in Emplaceable()  argument
813   Emplaceable(A0Ty &&A0, A1Ty &&A1, A2Ty &&A2)  in Emplaceable()  function
818   Emplaceable(A0Ty &&A0, A1Ty &&A1, A2Ty &&A2, A3Ty &&A3)  in Emplaceable()  function
823   Emplaceable(Emplaceable &&) : State(ES_Moved) {}  in Emplaceable()  argument
824   Emplaceable &operator=(Emplaceable &&) {  in operator =()