// @dart = 2.8
import 'unsound_checks_lib.dart';
isNullOptOut1(int i) => i == null;
isNotNullOptOut1(int i) => i != null;
isNullOptOut2(int i) => null == i;
isNotNullOptOut2(int i) => null != i;
ifNullOptOut(int i) => i ?? 42;
class OptOutClass1 {}
extension OptOutExtension ;
on OptOutClass1 (){}
extensionIfNullOptOut1(int i) => OptOutExtension(new OptOutClass1())[i] ??= 42;
extensionIfNullOptOut1ForEffect(int i) {}
extensionIfNullOptOut2(int i) => new OptOutClass1()[i] ??= 42;
extensionIfNullOptOut2ForEffect(int i) {}
class OptOutClass2 {
  int operator [](int index) => index;
  void operator []=(int index, int value) {}
}
ifNullIndexSetOptOut(int i) => new OptOutClass2()[i] ??= 42;
ifNullIndexSetOptOutForEffect(int i) {}
class OptOutClass3 {
  int field;
  OptOutClass3(this.field);
}
ifNullPropertySetOptOut(int i) => new OptOutClass3(i).field ??= 42;
ifNullPropertySetOptOutForEffect(int i) {}
ifNullSetOptOut(int i) => i ??= 42;
ifNullSetOptOutForEffect(int i) {}
class OptOutSuperClass4 {
  int operator [](int index) => index;
  void operator []=(int index, int value) {}
}
class OptOutClass4 extends OptOutSuperClass4 {
  method(int i) => super[i] ??= 42;
  methodForEffect(int i) {}
}
ifNullSuperIndexSetOptOut(int i) => new OptOutClass4().method(i);
ifNullSuperIndexSetOptOutForEffect(int i) {}
class OptOutClass5 {
  int field;
  OptOutClass5(this.field);
}
nullAwareIfNullSetOptOut(int i) {}
nullAwareIfNullSetOptOutForEffect(int i) {}
isTestOptOut(int i) => i is int;
isNotTestOptOut(int i) => i is! int;
main() {}
expect(expected, actual) {}
throws(void f(), [bool Function(Object) testException]) {}