Abstract: A method is disclosed for providing a trace of mailing list expansion performed on an electronic message delivered to an electronic mailing list. The method comprises receiving an electronic message addressed to an electronic mailing list having a set of recipients; inserting an informational header line in a message header of the electronic message that is indicative of the electronic mailing list; and relaying the message for delivery to the set of recipients on the electronic mailing list.

Abstract: A method, system and computer program product for converting a class (i.e., type) of an object from a first class to a second class. Multiple classes, class layouts, and an object layout are received. A first class layout references a first virtual function table (v-table) that defines behaviors of the first class. A second class layout references a second v-table that defines behaviors of the second class. The object layout includes a reference to the first v-table to define runtime behaviors of the object as the behaviors of the first class. At runtime, the reference in the object layout is modified to reference the second v-table to update the object's runtime behaviors to the behaviors of the second class, thereby converting the object from the first class to the second class without changing to an object layout memory address or to any class layout.

Abstract: A method is disclosed for providing a trace of mailing list expansion performed on an electronic message delivered to an electronic mailing list. The method comprises receiving an electronic message addressed to an electronic mailing list having a set of recipients; inserting an informational header line in a message header of the electronic message that is indicative of the electronic mailing list; and relaying the message for delivery to the set of recipients on the electronic mailing list.

Abstract: A method, system and computer program product for converting, at run-time, a class of an object from a source class to a destination class. A statement in intermediate code indicating the conversion of the object from the source class to destination class is identified. The destination class is determined to be polymorphic to the source class. Memory space required for the destination class is determined to be less than or equal to the memory space required for the source class. A class hierarchy is traversed up and down at compile time to generate conversion code. At runtime and via up and down traversals of the class hierarchy, the pointer to a virtual function table (v-table) of the object is updated from referencing the v-table of the source class to referencing the v-table of the destination class.

Abstract: A method, system and computer program product for converting a class (i.e., type) of an object from a first class to a second class. Multiple classes, class layouts, and an object layout are received. A first class layout references a first virtual function table (v-table) that defines behaviors of the first class. A second class layout references a second v-table that defines behaviors of the second class. The object layout includes a reference to the first v-table to define runtime behaviors of the object as the behaviors of the first class. At runtime, the reference in the object layout is modified to reference the second v-table to update the object's runtime behaviors to the behaviors of the second class, thereby converting the object from the first class to the second class without changing to an object layout memory address or to any class layout.