// 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.
// @dart=2.9
/*@testedFeatures=inference*/
library test;

class A {}

class B extends A {
  A operator +(C v) => null;
  B operator -(int i) => null;
  B operator *(B v) => null;
  C operator &(A v) => null;

  static B staticVariable;
}

class C extends B {}

T f<T>() => null;

B topLevelVariable;

void test_topLevelVariable() {
  topLevelVariable = /*@ typeArgs=B* */ f();

  topLevelVariable  ??= /*@ typeArgs=B* */ f();

  topLevelVariable /*@target=B.+*/ += /*@ typeArgs=C* */ f();

  topLevelVariable /*@target=B.**/ *= /*@ typeArgs=B* */ f();

  topLevelVariable /*@target=B.&*/ &= /*@ typeArgs=A* */ f();

  /*@target=B.-*/ --topLevelVariable;

  topLevelVariable /*@target=B.-*/ --;

  var /*@ type=B* */ v1 = topLevelVariable = /*@ typeArgs=B* */ f();

  var /*@ type=B* */ v2 =
      topLevelVariable  ??= /*@ typeArgs=B* */ f();

  var /*@ type=A* */ v3 =
      topLevelVariable /*@target=B.+*/ += /*@ typeArgs=C* */ f();

  var /*@ type=B* */ v4 =
      topLevelVariable /*@target=B.**/ *= /*@ typeArgs=B* */ f();

  var /*@ type=C* */ v5 =
      topLevelVariable /*@target=B.&*/ &= /*@ typeArgs=A* */ f();

  var /*@ type=B* */ v6 = /*@target=B.-*/ --topLevelVariable;

  var /*@ type=B* */ v7 = /*@ type=B* */ topLevelVariable
      /*@ type=B* */ /*@target=B.-*/ --;
}

void test_staticVariable() {
  B.staticVariable = /*@ typeArgs=B* */ f();

  B.staticVariable  ??= /*@ typeArgs=B* */ f();

  B.staticVariable /*@target=B.+*/ += /*@ typeArgs=C* */ f();

  B.staticVariable /*@target=B.**/ *= /*@ typeArgs=B* */ f();

  B.staticVariable /*@target=B.&*/ &= /*@ typeArgs=A* */ f();

  /*@target=B.-*/ --B.staticVariable;

  B.staticVariable /*@target=B.-*/ --;

  var /*@ type=B* */ v1 = B.staticVariable = /*@ typeArgs=B* */ f();

  var /*@ type=B* */ v2 =
      B.staticVariable  ??= /*@ typeArgs=B* */ f();

  var /*@ type=A* */ v3 =
      B.staticVariable /*@target=B.+*/ += /*@ typeArgs=C* */ f();

  var /*@ type=B* */ v4 =
      B.staticVariable /*@target=B.**/ *= /*@ typeArgs=B* */ f();

  var /*@ type=C* */ v5 =
      B.staticVariable /*@target=B.&*/ &= /*@ typeArgs=A* */ f();

  var /*@ type=B* */ v6 = /*@target=B.-*/ --B.staticVariable;

  var /*@ type=B* */ v7 =
      B. /*@ type=B* */ staticVariable /*@ type=B* */ /*@target=B.-*/ --;
}

main() {}