System and method for aggregate handling of operator overloading. A program is created, including an aggregate comprising multiple data elements of one or more data types, and an operator applied to the aggregate. At least one of the data types is user-defined, and specifies a user-defined operator function for the operator. The aggregate is analyzed to determine one or more operator functions implementing the operator for the data elements, and executable code invoking the one or more operator functions for the plurality of data elements generated, e.g., for each data element in the aggregate: if the data type of the data element specifies an operator function for the operator, executable code invoking the function may be generated, and if not, then if the data element is another aggregate, the analyzing/generating is performed for the other aggregate, and if the data element is not an aggregate, an error may be indicated.