Is it possible to create Dart class extensions that implement or override inherited methods?

user_2216860 0
Viewed 765

I'd like to use code generators that create extensions for classes that should implement some boilerplate methods, but apparently I cannot :)

Sample code:

abstract class Base {
   foo(int param) { print("Base::foo $param"); }
}

class Derived extends Base {
  
}

extension DerivedWithFoo on Derived {
  foo(int param) { print("Derived::foo $param");}
}

void main() {
 final d = Derived();
 d.foo(5); 
}

Output:

Base::foo 5

It looks like that extension method calls are somehow early bound?

Thanks.

dart extension-methods
1 Answers

really don't work,

but work with mixin

abstract class Base {
  foo(int param) { print("Base::foo $param"); }
}

mixin MyMixin {
  foo(int param) { print("Mixin::foo $param");}
}

class Derived extends Base with MyMixin {
}

void main() {
  final d = Derived();
  d.foo(5);
}
user_32545450
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