Dart Generics

main.dart

class Cat {
  const Cat(this.name);
  final String name;
}

void f<T>(T arg) {
  if (arg is String) {
    print('This is String!');
  }

  if (arg is int) {
    print('This is int!');
  }

  if (arg is Cat) {
    print('This is Cat!');
    print('Cat name is ${arg.name}');
  }
  print('arg is String: ${arg is String}');
  print('arg == String: ${arg == String}');
  print('T is String: ${T is String}');
  print('T == String: ${T == String}');
  print('arg is int: ${arg is int}');
  print('arg == int: ${arg == int}');
  print('T is int: ${T is int}');
  print('T == int: ${T == int}');
  print('arg is Cat: ${arg is Cat}');
  print('arg == Cat: ${arg == Cat}');
  print('T is Cat: ${T is Cat}');
  print('T == Cat: ${T == Cat}');
}

void main() {
  print('String');
  f('moji');
  print('---');
  print('int');
  f(123);
  print('---');
  print('Cat');
  f(Cat('pinkie'));
}