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

typedef F<T extends core::Object> = (T) → T;
class B extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  get x() → (core::int) → core::int {
    throw "Should not be reached";
  }
  set x((core::int) → core::int value) → void {
    throw "Should not be reached";
  }
}
abstract class I<T extends core::Object> extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  abstract generic-contravariant get x() → (self::I::T) → self::I::T;
  abstract set x(generic-covariant-impl generic-covariant-interface (self::I::T) → self::I::T value) → void;
}
class M extends core::Object {
  synthetic constructor •() → void
    : super core::Object::•()
    ;
  get x() → (core::int) → core::int
    return (core::int i) → core::int {
      self::expect(i, 1);
      return 2;
    };
  set x((core::int) → core::int value) → void {
    self::expect(value.call(3), 4);
  }
}
class C = self::B with self::M implements self::I<core::int> {
  constructor •() → void
    : super self::B::•()
    ;
}
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.{core::Object::==}(expected)) {
    throw "Expected ${expected}, got ${value}";
  }
}
static method test(self::I<core::Object> iObj, self::I<core::int> iInt) → void {
  self::expectTypeError(() → core::Null {
    (core::Object) → core::Object x = iObj.{self::I::x} as{TypeError} (core::Object) → core::Object;
  });
  (core::int) → core::int x = iInt.{self::I::x} as{TypeError} (core::int) → core::int;
  self::expect(x.call(1), 2);
  self::expectTypeError(() → core::Null {
    (core::int) → core::Object f = (core::int value) → core::int => 4;
    iObj.{self::I::x} = f;
  });
  function g(core::int value) → core::int {
    self::expect(value, 3);
    return 4;
  }
  iInt.{self::I::x} = g;
}
static method main() → void {
  self::C c = new self::C::•();
  self::test(c, c);
}