public void initOperands(int opcount) {
		operandcount = opcount;
		subExpressions = new Expression[opcount];
		for (int i = 0; i < opcount; i++) {
			subExpressions[i] = new NopOperator(Type.tUnknown);
			subExpressions[i].parent = this;
		}
		updateSubTypes();
	}