Function Alias in Dart

Aliases in Dart allow us to provide an alternate name for an existing class or library, making our code more concise and readable. We can create aliases for import statements and type declarations.

Here's an example of creating an alias for a library:

//original import statement
import 'package:flutter/material.dart';
//alias import statement

import 'package:flutter/material.dart' as myAlias;
void main() {

  //original widget declaration

  MaterialApp myApp = MaterialApp();

  

  //alias declaration

  myAlias.MaterialApp myAliasApp = myAlias.MaterialApp();

  

  //using the original widget

  runApp(myApp);

  

  //using the alias widget

  runApp(myAliasApp);

}

In the code above, we created an alias (myAlias) for the flutter/material.dart library. Later, we used the alias to create an instance of the MaterialApp widget.

We can also use aliases for type declarations, like this:

//original type declaration
void printInteger(int aNumber) {
  print('The number is $aNumber.');
}
//alias type declaration

typedef IntFunction = void Function(int);
void main() {

  //using the original function declaration

  printInteger(42);

  

  //using the alias function declaration

  IntFunction myFunction = printInteger;

  myFunction(42);

}

In this example, we created an alias (IntFunction) for the type void Function(int). We then used the alias to create a variable (myFunction) that points to the printInteger function.

By using aliases, we can make our code easier to read and understand, especially when working with imported libraries or complex type declarations.