Using Caché Objects - InterSystems Documentation

Object-Specific ObjectScript Features
Method CountBricks()
{
Write "There are ",..Bricks," bricks.",!
}
Similarly, a WallCheck method can refer to CountBricks and Bricks with .. syntax:
Method WallCheck()
{
Do ..CountBricks()
If ..Bricks < 100 {
Write "Your wall will be small."
}
}
21.2 ##Class Syntax
The ##class syntax allows you to:
• Invoke a class method when there is no existing or open instance of a class.
• Cast a method from one class as a method from another.
Note:
##class is case insensitive.
21.2.1 Invoking a Class Method
To invoke a class method, the syntax is either of the following:
>Do ##class(Package.Class).Method(Args)
>Set localname = ##class(Package.Class).Method(Args)
It is also valid to use ##class as part of an expression, as in
Write ##class(Class).Method(args)*2
without setting a variable equal to the return value.
A frequent use of this syntax is in the creation of new instances:
>Set LocalInstance = ##class(Package.Class).%New()
21.2.2 Casting a Method
To cast a method of one class as a method of another class, the syntax is either of the following:
180 Using Caché Objects