Callable classes in Dart


In this article, we are going to learn about the Callable classes in Dart.

Callable class?

Dart facilitates us to call the class instances like a function.

To allow an instance of your Dart class to be called like a function, implement the call() method from the Dart official. Please check the below code:

Output: 16

In the above example, the ClassAsFunction class defines a call() function that takes two integers and returns the product of them.

Note: Dart doesn’t allow us to create multiple call() functions for a class and if you do that, Dart raises the compilation error. Please check the below code:

error The name ‘call’ is already defined.

Thanks for reading.

Happy Coding 🙂

For more Flutter tutorials visit Mobikul Blogs.

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Hussein Zawia

Hussein Zawia

Co-founder, 24Dokan

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