Using Caché Objects - InterSystems Documentation

##super Syntax
21.4 ##super Syntax
Suppose that a subclass method overrides a superclass method. From within the subclass
method, you can use the ##super() syntax to invoke the overridden superclass method.
Note:
##super is case sensitive and must be in all lowercase.
For example, suppose that the class MyClass.Down extends MyClass.Up and overrides the
Simple class method. If the code for MyClass.Up.Simple is:
ClassMethod Simple()
{
Write "Superclass.",!
}
and the code for MyClass.Down.Simple is:
ClassMethod Simple()
{
Write "Subclass.",!
Do ##super()
}
then the output for subclass method, MyClass.Down.Simple, is:
>Do ##Class(MyClass.Down).Simple()
Subclass.
Superclass.
>
##super also works with methods that accept arguments. For example, if the code for
MyClass.Up.SelfAdd is:
ClassMethod SelfAdd(Arg)
{
Write Arg,!
Write Arg + Arg
Quit
}
then its output is:
>Do ##Class(MyClass.Up).SelfAdd(2)
2
4
>
If the code for MyClass.Down.SelfAdd is:
Using Caché Objects 183