/*
* The data structure for a (linked list of) execution stacks.
*/
typedef struct ExecStack {
struct ExecStack *prevPtr;
struct ExecStack *nextPtr;
[[Tcl_Obj]] **markerPtr;
Tcl_Obj **endPtr;
Tcl_Obj **tosPtr;
Tcl_Obj *stackWords[1];
} ExecStack;