Tcl Object‐Oriented Programming

The object‐oriented programming concept has been introduced with Tool command language (Tcl) 8.6. There are two different approaches to define a command including action‐oriented and object‐oriented. When the command is invoked, the first argument specifies the operation to perform on the object. Creation or instantiation of the object is the primary work of the class. An object can execute some task by defining the method. A data member for each object variable of the class is defined by the variable statement. The constructor and destructor are two special methods used to create and destroy objects automatically. TclOO provides a virtual command my to evaluate a method within the current object. The my command is used in the object to invoke the method of its class. It returns the name of the current object that can be combined with the method name and argument to register a callback.