Callable objects
Learn how to create and use callable objects in Dart.
To allow an instance of your Dart class to be called like a
function, implement the call() method.
The call() method allows an instance of any
class that defines it to emulate a function. This method
supports the same functionality as normal
functions
such as parameters and return types.
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. Click Run to
execute the code.
class WannabeFunction {
String call(String a, String b, String c) => '$a $b $c!';
}
var wf = WannabeFunction();
var out = wf('Hi', 'there,', 'gang');
void main() => print(out);