library test;
import self as self;
import "dart:core" as core;

class B extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  get x() → core::int {
    throw "Should not be reached";
  }
  set x(core::int value) → void {
    throw "Should not be reached";
  }
  get y() → core::int {
    throw "Should not be reached";
  }
  set y(core::int value) → void {
    throw "Should not be reached";
  }
}
abstract class I<T extends core::Object = dynamic> extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  abstract get x() → self::I::T;
  abstract set x(self::I::T value) → void;
  abstract get y() → core::Object;
  abstract set y(covariant core::Object value) → void;
}
class M extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  get x() → core::int
    return 1;
  set x(core::int value) → void {
    self::expect(value, 2);
  }
  get y() → core::int
    return 3;
  set y(core::int value) → void {
    self::expect(value, 4);
  }
}
class C extends self::B implements self::I<core::int>, self::M {
  synthetic constructor •() → void
    : super self::B::•()
    ;
  get x() → core::int
    return 1;
  set x(core::int value) → void {
    self::expect(value, 2);
  }
  get y() → core::int
    return 3;
  set y(core::int value) → void {
    self::expect(value, 4);
  }
}
static method expectTypeError(() → void callback) → void {
  try {
    callback.call();
    throw "Expected TypeError, did not occur";
  }
  on core::TypeError catch(no-exception-var) {
  }
}
static method expect(core::Object value, core::Object expected) → void {
  if(!value.==(expected)) {
    throw "Expected ${expected}, got ${value}";
  }
}
static method test(self::I<core::Object> i) → void {
  self::expectTypeError(() → dynamic {
    i.x = "hello";
  });
  i.x = 2;
  self::expect(i.x, 1);
  self::expectTypeError(() → dynamic {
    i.y = "hello";
  });
  i.y = 4;
  self::expect(i.y, 3);
}
static method main() → void {
  self::test(new self::C::•());
}