201     oparg_T	*oap,		// operator argument, can be NULL  in do_mouse()  argument
372     if (oap != NULL)  in do_mouse()
373 	regname = oap->regname;  in do_mouse()
384 	    if (oap != NULL && oap->op_type != OP_NOP)  in do_mouse()
386 		clearopbeep(oap);  in do_mouse()
666     if (!is_drag && oap != NULL && oap->op_type != OP_NOP)  in do_mouse()
669 	oap->motion_type = MCHAR;  in do_mouse()
678 			oap == NULL ? NULL : &(oap->inclusive), which_button);  in do_mouse()
703     if (curwin != old_curwin && oap != NULL && oap->op_type != OP_NOP)  in do_mouse()
704 	clearop(oap);  in do_mouse()
965 		if (oap != NULL)  in do_mouse()
966 		    oap->motion_type = MCHAR;  in do_mouse()
967 		if (oap != NULL  in do_mouse()
971 			&& (pos = findmatch(oap, NUL)) != NULL)  in do_mouse()
974 		    if (oap->motion_type == MLINE)  in do_mouse()
2098     (void)do_mouse(cap->oap, cap->cmdchar, BACKWARD, cap->count1, 0);  in nv_mouse()