union Examples
Let’s look at a few examples of unions.
We'll cover the following...
Communication protocol
In some protocols like TCP/IP, the meanings of certain parts of a protocol packet depend on a specific value inside the same packet. Usually, it is a field in the header of the packet that determines the meanings of successive bytes. Unions can be used for representing such protocol packets.
The following design represents a protocol packet that has two kinds:
Press + to interact
struct Host {// ...}struct ProtocolA {// ...}struct ProtocolB {// ...}enum ProtocolType { A, B }struct NetworkPacket {Host source;Host destination;ProtocolType type;union {ProtocolA aParts;ProtocolB bParts;}ubyte[] payload;}void main() {}
The struct ...