"instname",			/* name */
    NULL,			/* freeIntRepProc */
    NULL,			/* dupIntRepProc */
    UpdateStringOfInstName,	/* updateStringProc */
    NULL,			/* setFromAnyProc */
};

#define InstNameSetInternalRep(objPtr, inst)				\
    do {							\
	Tcl_ObjInternalRep ir;					\
	ir.wideValue = (inst);					\
	Tcl_StoreInternalRep((objPtr), &instNameType, &ir);		\
    } while (0)

#define InstNameGetInternalRep(objPtr, inst)				\
    do {							\
	const Tcl_ObjInternalRep *irPtr;				\
	irPtr = TclFetchInternalRep((objPtr), &instNameType);	\
	assert(irPtr != NULL);					\
	(inst) = (size_t)irPtr->wideValue;			\
    } while (0)


/*
 *----------------------------------------------------------------------

    unsigned char *codeStart, *codeLimit, *pc;
    unsigned char *codeDeltaNext, *codeLengthNext;
    unsigned char *srcDeltaNext, *srcLengthNext;
    int codeOffset, codeLen, srcOffset, srcLen, numCmds, delta, i, line;
    Interp *iPtr;
    Tcl_Obj *bufferObj, *fileObj;

    ByteCodeGetInternalRep(objPtr, &tclByteCodeType, codePtr);

    iPtr = (Interp *) *codePtr->interpHandle;

    TclNewObj(bufferObj);
    if (!codePtr->refCount) {
	return bufferObj;	/* Already freed. */
    }

        Tcl_DecrRefCount(result);
        iPtr->innerContext = result = Tcl_NewListObj(objc + 1, NULL);
        Tcl_IncrRefCount(result);
    } else {
        int len;

        /*
         * Reset while keeping the list internalrep as much as possible.
         */

	Tcl_ListObjLength(interp, result, &len);
        Tcl_ListObjReplace(interp, result, 0, len, 0, NULL);
    }
    Tcl_ListObjAppendElement(NULL, result, TclNewInstNameObj(*pc));

TclNewInstNameObj(
    unsigned char inst)
{
    Tcl_Obj *objPtr;

    TclNewObj(objPtr);
    TclInvalidateStringRep(objPtr);
    InstNameSetInternalRep(objPtr, (long) inst);

    return objPtr;
}

/*
 *----------------------------------------------------------------------
 *

static void
UpdateStringOfInstName(
    Tcl_Obj *objPtr)
{
    size_t inst;	/* NOTE: We know this is really an unsigned char */
    char *dst;

    InstNameGetInternalRep(objPtr, inst);

    if (inst > LAST_INST_OPCODE) {
	dst = Tcl_InitStringRep(objPtr, NULL, TCL_INTEGER_SPACE + 5);
	TclOOM(dst, (size_t)TCL_INTEGER_SPACE + 5);
        sprintf(dst, "inst_%" TCL_Z_MODIFIER "u", inst);
	(void) Tcl_InitStringRep(objPtr, NULL, strlen(dst));
    } else {

    ByteCode *codePtr;
    Tcl_Obj *description, *literals, *variables, *instructions, *inst;
    Tcl_Obj *aux, *exn, *commands, *file;
    unsigned char *pc, *opnd, *codeOffPtr, *codeLenPtr, *srcOffPtr, *srcLenPtr;
    int codeOffset, codeLength, sourceOffset, sourceLength;
    int i, val, line;

    ByteCodeGetInternalRep(objPtr, &tclByteCodeType, codePtr);

    /*
     * Get the literals from the bytecode.
     */

    TclNewObj(literals);
    for (i=0 ; i<codePtr->numLitObjects ; i++) {

	 */

	if (objc != 3) {
	    Tcl_WrongNumArgs(interp, 2, objv, "script");
	    return TCL_ERROR;
	}

	if (!TclHasInternalRep(objv[2], &tclByteCodeType) && (TCL_OK
		!= TclSetByteCodeFromAny(interp, objv[2], NULL, NULL))) {
	    return TCL_ERROR;
	}
	codeObjPtr = objv[2];
	break;

    case DISAS_CLASS_CONSTRUCTOR:

	    return TCL_ERROR;
	}

	/*
	 * Compile if necessary.
	 */

	if (!TclHasInternalRep(procPtr->bodyPtr, &tclByteCodeType)) {
	    Command cmd;

	    /*
	     * Yes, this is ugly, but we need to pass the namespace in to the
	     * compiler in two places.
	     */

	    return TCL_ERROR;
	}

	/*
	 * Compile if necessary.
	 */

	if (!TclHasInternalRep(procPtr->bodyPtr, &tclByteCodeType)) {
	    Command cmd;

	    /*
	     * Yes, this is ugly, but we need to pass the namespace in to the
	     * compiler in two places.
	     */

	if (procPtr == NULL) {
	    Tcl_SetObjResult(interp, Tcl_NewStringObj(
		    "body not available for this kind of method", -1));
	    Tcl_SetErrorCode(interp, "TCL", "OPERATION", "DISASSEMBLE",
		    "METHODTYPE", NULL);
	    return TCL_ERROR;
	}
	if (!TclHasInternalRep(procPtr->bodyPtr, &tclByteCodeType)) {
	    Command cmd;

	    /*
	     * Yes, this is ugly, but we need to pass the namespace in to the
	     * compiler in two places.
	     */

	CLANG_ASSERT(0);
    }

    /*
     * Do the actual disassembly.
     */

    ByteCodeGetInternalRep(codeObjPtr, &tclByteCodeType, codePtr);

    if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) {
	Tcl_SetObjResult(interp, Tcl_NewStringObj(
		"may not disassemble prebuilt bytecode", -1));
	Tcl_SetErrorCode(interp, "TCL", "OPERATION", "DISASSEMBLE",
		"BYTECODE", NULL);
	return TCL_ERROR;