* constructed out of substrings of the
				 * original expression. In order to keep the
				 * error message readable, we impose this
				 * limit on the substring size we extract. */

    TclParseInit(interp, start, numBytes, parsePtr);

    nodes = Tcl_AttemptAlloc(nodesAvailable * sizeof(OpNode));
    nodes = (OpNode *)Tcl_AttemptAlloc(nodesAvailable * sizeof(OpNode));
    if (nodes == NULL) {
	TclNewLiteralStringObj(msg, "not enough memory to parse expression");
	errCode = "NOMEM";
	goto error;
    }

    /*

	if (nodesUsed >= nodesAvailable) {
	    unsigned int size = nodesUsed * 2;
	    OpNode *newPtr = NULL;

	    do {
	      if (size <= UINT_MAX/sizeof(OpNode)) {
		newPtr = Tcl_AttemptRealloc(nodes, size * sizeof(OpNode));
		newPtr = (OpNode *)Tcl_AttemptRealloc(nodes, size * sizeof(OpNode));
	      }
	    } while ((newPtr == NULL)
		    && ((size -= (size - nodesUsed) / 2) > nodesUsed));
	    if (newPtr == NULL) {
		TclNewLiteralStringObj(msg,
			"not enough memory to parse expression");
		errCode = "NOMEM";

		    errCode = "BADCHAR";
		    goto error;
		}
		scanned = tokenPtr->size;
		break;

	    case SCRIPT: {
		Tcl_Parse *nestedPtr =
		Tcl_Parse *nestedPtr = (Tcl_Parse *)
			TclStackAlloc(interp, sizeof(Tcl_Parse));

		tokenPtr = parsePtr->tokenPtr + parsePtr->numTokens;
		tokenPtr->type = TCL_TOKEN_COMMAND;
		tokenPtr->start = start;
		tokenPtr->numComponents = 0;

				 * the parsed expression; any previous
				 * information in the structure is ignored. */
{
    int code;
    OpNode *opTree = NULL;	/* Will point to the tree of operators. */
    Tcl_Obj *litList = Tcl_NewObj();	/* List to hold the literals. */
    Tcl_Obj *funcList = Tcl_NewObj();	/* List to hold the functon names. */
    Tcl_Parse *exprParsePtr = TclStackAlloc(interp, sizeof(Tcl_Parse));
    Tcl_Parse *exprParsePtr = (Tcl_Parse *)TclStackAlloc(interp, sizeof(Tcl_Parse));
				/* Holds the Tcl_Tokens of substitutions. */

    if (numBytes == TCL_AUTO_LENGTH) {
	numBytes = (start ? strlen(start) : 0);
    }

    code = ParseExpr(interp, start, numBytes, &opTree, litList, funcList,

    size_t numBytes,		/* Number of bytes in script. */
    CompileEnv *envPtr,		/* Holds resulting instructions. */
    int optimize)		/* 0 for one-off expressions. */
{
    OpNode *opTree = NULL;	/* Will point to the tree of operators */
    Tcl_Obj *litList = Tcl_NewObj();	/* List to hold the literals */
    Tcl_Obj *funcList = Tcl_NewObj();	/* List to hold the functon names*/
    Tcl_Parse *parsePtr = TclStackAlloc(interp, sizeof(Tcl_Parse));
    Tcl_Parse *parsePtr = (Tcl_Parse *)TclStackAlloc(interp, sizeof(Tcl_Parse));
				/* Holds the Tcl_Tokens of substitutions */

    int code = ParseExpr(interp, script, numBytes, &opTree, litList,
	    funcList, parsePtr, 0 /* parseOnly */);

    if (code == TCL_OK) {
	/*

    /*
     * Note we are compiling an expression with literal arguments. This means
     * there can be no [info frame] calls when we execute the resulting
     * bytecode, so there's no need to tend to TIP 280 issues.
     */

    envPtr = TclStackAlloc(interp, sizeof(CompileEnv));
    envPtr = (CompileEnv *)TclStackAlloc(interp, sizeof(CompileEnv));
    TclInitCompileEnv(interp, envPtr, NULL, 0, NULL, 0);
    CompileExprTree(interp, nodes, index, litObjvPtr, NULL, NULL, envPtr,
	    0 /* optimize */);
    TclEmitOpcode(INST_DONE, envPtr);
    byteCodePtr = TclInitByteCode(envPtr);
    TclFreeCompileEnv(envPtr);
    TclStackFree(interp, envPtr);

		 */

		nodePtr->left = numWords;
		numWords = 2;	/* Command plus one argument */
		break;
	    }
	    case QUESTION:
		newJump = TclStackAlloc(interp, sizeof(JumpList));
		newJump = (JumpList *)TclStackAlloc(interp, sizeof(JumpList));
		newJump->next = jumpPtr;
		jumpPtr = newJump;
		TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpPtr->jump);
		break;
	    case COLON:
		newJump = TclStackAlloc(interp, sizeof(JumpList));
		newJump = (JumpList *)TclStackAlloc(interp, sizeof(JumpList));
		newJump->next = jumpPtr;
		jumpPtr = newJump;
		TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP,
			&jumpPtr->jump);
		TclAdjustStackDepth(-1, envPtr);
		if (convert) {
		    jumpPtr->jump.jumpType = TCL_TRUE_JUMP;
		}
		convert = 1;
		break;
	    case AND:
	    case OR:
		newJump = TclStackAlloc(interp, sizeof(JumpList));
		newJump = (JumpList *)TclStackAlloc(interp, sizeof(JumpList));
		newJump->next = jumpPtr;
		jumpPtr = newJump;
		TclEmitForwardJump(envPtr, (nodePtr->lexeme == AND)
			?  TCL_FALSE_JUMP : TCL_TRUE_JUMP, &jumpPtr->jump);
		break;
	    }
	} else {

int
TclSingleOpCmd(
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    TclOpCmdClientData *occdPtr = clientData;
    TclOpCmdClientData *occdPtr = (TclOpCmdClientData *)clientData;
    unsigned char lexeme;
    OpNode nodes[2];
    Tcl_Obj *const *litObjv = objv + 1;

    if (objc != 1 + occdPtr->i.numArgs) {
	Tcl_WrongNumArgs(interp, 1, objv, occdPtr->expected);
	return TCL_ERROR;

    Tcl_Obj *const objv[])
{
    int code = TCL_OK;

    if (objc < 3) {
	Tcl_SetObjResult(interp, Tcl_NewBooleanObj(1));
    } else {
	TclOpCmdClientData *occdPtr = clientData;
	Tcl_Obj **litObjv = TclStackAlloc(interp,
	TclOpCmdClientData *occdPtr = (TclOpCmdClientData *)clientData;
	Tcl_Obj **litObjv = (Tcl_Obj **)TclStackAlloc(interp,
		2 * (objc-2) * sizeof(Tcl_Obj *));
	OpNode *nodes = TclStackAlloc(interp, 2 * (objc-2) * sizeof(OpNode));
	OpNode *nodes = (OpNode *)TclStackAlloc(interp, 2 * (objc-2) * sizeof(OpNode));
	unsigned char lexeme;
	int i, lastAnd = 1;
	Tcl_Obj *const *litObjPtrPtr = litObjv;

	ParseLexeme(occdPtr->op, strlen(occdPtr->op), &lexeme, NULL);

	litObjv[0] = objv[1];

int
TclVariadicOpCmd(
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    TclOpCmdClientData *occdPtr = clientData;
    TclOpCmdClientData *occdPtr = (TclOpCmdClientData *)clientData;
    unsigned char lexeme;
    int code;

    if (objc < 2) {
	Tcl_SetObjResult(interp, Tcl_NewIntObj(occdPtr->i.identity));
	return TCL_OK;
    }

	code = ExecConstantExprTree(interp, nodes, 0, &litObjPtrPtr);

	Tcl_DecrRefCount(litObjv[decrMe]);
	return code;
    } else {
	Tcl_Obj *const *litObjv = objv + 1;
	OpNode *nodes = TclStackAlloc(interp, (objc-1) * sizeof(OpNode));
	OpNode *nodes = (OpNode *)TclStackAlloc(interp, (objc-1) * sizeof(OpNode));
	int i, lastOp = OT_LITERAL;

	nodes[0].lexeme = START;
	nodes[0].mark = MARK_RIGHT;
	if (lexeme == EXPON) {
	    for (i=objc-2; i>0; i--) {
		nodes[i].lexeme = lexeme;

int
TclNoIdentOpCmd(
    ClientData clientData,
    Tcl_Interp *interp,
    int objc,
    Tcl_Obj *const objv[])
{
    TclOpCmdClientData *occdPtr = clientData;
    TclOpCmdClientData *occdPtr = (TclOpCmdClientData *)clientData;

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, occdPtr->expected);
	return TCL_ERROR;
    }
    return TclVariadicOpCmd(clientData, interp, objc, objv);
}