pkg/front_end/testcases/runtime_checks/covariant_generic_parameter_in_interface.dart

// 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;

abstract class I<T> {
  void f1(T x);
  void f2(T x);
}

class C<U> implements I<int> {
  void f1(int /*@checkFormal=semiSafe*/ x) {}
  void f2(int /*@checkFormal=semiSafe*/ x, [U /*@checkFormal=semiSafe*/ y]) {}
}

void g1(C<num> c) {
  c.f1(1);
}

void g2(I<num> i) {
  i.f1 /*@checkCall=interface(semiTyped:0)*/ (1.5);
}

void g3(C<num> c) {
  c.f2 /*@checkCall=interface(semiTyped:1)*/ (1, 1.5);
}

void test() {
  g2(new C<num>());
}

void main() {}