Callable classes

To allow an instance of your Dart class to be called like a function, implement the call() method.

In the following example, the WannabeFunction class defines a call() function that takes three strings and concatenates them, separating each with a space, and appending an exclamation.

class WannabeFunction {

  String call(String a, String b, String c) => '$a $b $c!';

}

 

var wf = WannabeFunction();

var out = wf('Hi''there,''gang');

 

main() => print(out);



Hi there, gang!