@Abstract

Specifies that a declared element does not have sufficient functionality to use it directly.

Instructions

Note: Elements with @Abstract are also open to re-implementation almost the same as the modifier @Open

You must know

Instantiation

You cannot make an instance of an abstract class.

Mixed modifiers

You cannot put @Abstract together with @Shared, @Open, or @Override in the same declaration.

Class extension

When a class without @Abstract inherits from an abstract class, the child class must supply implementations of all abstract methods and properties that it inherited.

Declaration contexts

You can declare abstract methods and properties only in an abstract class.

Applies to

• Class Statement
• Method Statement
• Property Statement
• Trait Statement

Examples

@Abstract Class MyBaseClass
  @Abstract Method MyMethod
  End Method
End Class

Class MyDerivedClass Is MyBaseClass
  @Override Method MyMethod
  End Method
End Class