// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

/*@testedFeatures=checks*/
library test;

typedef F<T>(T x);

class C<T> {
  void f(T /*@covariance=genericInterface, genericImpl*/ x) {}
  void g1(T /*@covariance=genericInterface, genericImpl*/ x) {
    this.f /*@callKind=this*/ (x);
  }

  void g2(T /*@covariance=genericInterface, genericImpl*/ x) {
    f /*@callKind=this*/ (x);
  }

  void g3(C<T> /*@covariance=genericInterface, genericImpl*/ c,
      T /*@covariance=genericInterface, genericImpl*/ x) {
    c.f(x);
  }

  F<T> /*@genericContravariant=true*/ g4() => this. /*@callKind=this*/ f;
}

class
/*@forwardingStub=abstract void f(covariance=(genericImpl) int x)*/
/*@forwardingStub=abstract void g1(covariance=(genericImpl) int x)*/
/*@forwardingStub=abstract void g2(covariance=(genericImpl) int x)*/
/*@forwardingStub=abstract (int) -> dynamic g4()*/
/*@forwardingStub=abstract void g3(covariance=(genericImpl) C<int> c, covariance=(genericImpl) int x)*/
    D extends C<int> {}

class /*@forwardingStub=abstract void g1(covariance=(genericImpl) num x)*/
/*@forwardingStub=abstract void g2(covariance=(genericImpl) num x)*/
/*@forwardingStub=abstract (num) -> dynamic g4()*/
/*@forwardingStub=abstract void g3(covariance=(genericImpl) C<num> c, covariance=(genericImpl) num x)*/
    E extends C<num> {
  void f(covariant int /*@covariance=explicit*/ x) {}
}

test() {
  var x = new D().g4() as F<Object>;
  x /*@callKind=closure*/ ('hi');
  new E().g1(1.5);
}

main() {}