constant class field not const

not_a_const.dart

const strings = const Strings();

class Strings {
  const Strings();
  final Feature1 feature1 = const Feature1();
//     final Feature2 feature2 = const Feature2();
}

class Feature1 {
  const Feature1({
    this.text1 = 'x',
    this.text2 = 'y',
  });
  final String text1;
  final String text2;
}

void main() {
  final t = 'x';
  switch (t){
    case strings.feature1.text1:
      print('t is x');
      break;
    default:
      print('t is not x');
  }
}

so, const constructors will create defined compile-time literals, BUT THE LINKS TO THOS LITERALS IN THE FIELDS ARE NOT FIXED, SO EVENT IF YOU USE CONST CONSTRUCTOR, POINTERS TO THE FIELD LITERALS ARE DEFINED ON RUN-TIME, THUS FIELDS ARE NOT CONST.