typedef struct { /* semi-opaque - read only, and then only where commented */
Tcl_Interp *ip; /* valid, non-0 and useable if set */
Tcl_Obj *obj; /* non-0 iff set (but only test for 0/non-0) */
typedef struct { /* semi-opaque - read only, and then only where commented */
Tcl_Interp *ip; /* valid, non-0 and useable if set */
Tcl_Obj *obj; /* non-0 iff set (but only test for 0/non-0) */