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CAN interfaces inherit from other interfaces?
Interfaces can inherit from one or more interfaces. The derived interface inherits the members from its base interfaces. A class that implements a derived interface must implement all members in the derived interface, including all members of the derived interface’s base interfaces.
What is interface inheritance?
Inheritance is the mechanism in java by which one class is allowed to inherit the features of another class. Interface is the blueprint of the class. Like a class, an interface can have methods and variables, but the methods declared in an interface are by default abstract (only method signature, no body).
What is a use for an empty interface?
An empty interface may hold values of any type. Empty interfaces are used by code that handles values of unknown type. For example, fmt. Print takes any number of arguments of type interface{} .
How are empty interfaces defined in C #?
An interface defines a contract that the implementer adheres to – if you have empty interfaces that you don’t use reflection over (as one does with marker interfaces), then you might as well use Object as the (already existing) base type. You answered your own question…
When to use custom attribute for empty interfaces?
If your design includes empty interfaces that types are expected to implement, you are probably using an interface as a marker or a way to identify a group of types. If this identification will occur at run time, the correct way to accomplish this is to use a custom attribute.
Is it bad to inherit an interface from another interface?
It’s a bad idea to inherit some interfaces such as IDisposable, since this forces all implementations of your new interface to implement the dispose pattern even if they do not have any disposable resources. Technically speaking, interfaces don’t inherit from each other.
Are there any problems with a marker interface?
A major problem with marker interfaces is that an interface defines a contract for implementing classes, and that contract is inherited by all subclasses. This means that you cannot “unimplement” a marker.