dartoverridingdart-mirrorspetitparser

@override of Dart code

I noticed PetitParserDart has a lot of @override in the code, but I don't know how do they be checked?

I tried IDEA dart-plugin for @override, but it has no effect at all. How can we use @override with Dart?

Solution

  • The @override annotation is an example of metadata. You can use Mirrors to check for these in code. Here is a simple example that checks if the m1() method in the child class has the @override annotation:

    import 'package:meta/meta.dart';
import 'dart:mirrors';

class A {
  m1() {}
}

class B extends A {
  @override m1() {}
}

void main() {
  ClassMirror classMirror = reflectClass(B);
  MethodMirror methodMirror = classMirror.methods[const Symbol('m1')];
  InstanceMirror instanceMirror = methodMirror.metadata.first;
  print(instanceMirror.reflectee);  // Instance of '_Override@0x2fa0dc31'
}