// 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=inference*/
library test;

int getInt() => 0;
num getNum() => 0;
double getDouble() => 0.0;

class Test1 {
  int prop = 1;
  int? prop2;

  static void test(Test1? t) {
    var /*@type=int?*/ v1 = /*@type=Test1?*/  /*@promotedType=Test1*/t
        ?. /*@target=Test1.prop*/ prop = getInt();

    var /*@type=int?*/ v4 =
         t
                ?. /*@target=Test1.prop2*/ /*@target=Test1.prop2*/ prop2
             ??= getInt();

    var /*@type=int?*/ v7 =
         t
                ?. /*@target=Test1.prop*/ /*@target=Test1.prop*/ prop
            /*@target=num.+*/ += getInt();

    var /*@type=int?*/ v10 = /*@target=num.+*/ ++  t
        ?. /*@target=Test1.prop*/ /*@target=Test1.prop*/ prop;

    var /*@type=int?*/ v11 =
         t
            ?. /*@target=Test1.prop*/ /*@target=Test1.prop*/ prop
        /*@target=num.+*/ ++;
  }
}

class Test2 {
  num prop = 0;
  num? prop2;

  static void test(Test2? t) {
    var /*@type=int?*/ v1 = /*@type=Test2?*/  /*@promotedType=Test2*/t
        ?. /*@target=Test2.prop*/ prop = getInt();

    var /*@type=num?*/ v2 = /*@type=Test2?*/  /*@promotedType=Test2*/t
        ?. /*@target=Test2.prop*/ prop = getNum();

    var /*@type=double?*/ v3 = /*@type=Test2?*/  /*@promotedType=Test2*/t
        ?. /*@target=Test2.prop*/ prop = getDouble();

    var /*@type=num?*/ v4 =
         t
                ?. /*@target=Test2.prop2*/ /*@target=Test2.prop2*/ prop2
             ??= getInt();

    var /*@type=num?*/ v5 =
         t
                ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
             ??= getNum();

    var /*@type=num?*/ v6 =  t
            ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
         ??= getDouble();

    var /*@type=num?*/ v7 =
         t
                ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
            /*@target=num.+*/ += getInt();

    var /*@type=num?*/ v8 =
         t
                ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
            /*@target=num.+*/ += getNum();

    var /*@type=double?*/ v9 =
         t
                ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
            /*@target=num.+*/ += getDouble();

    var /*@type=num?*/ v10 = /*@target=num.+*/ ++  t
        ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop;

    var /*@type=num?*/ v11 =
         t
            ?. /*@target=Test2.prop*/ /*@target=Test2.prop*/ prop
        /*@target=num.+*/ ++;
  }
}

class Test3 {
  double prop = 0;
  double? prop2;

  static void test3(Test3? t) {
    var /*@type=double?*/ v3 =
        /*@type=Test3?*/  /*@promotedType=Test3*/t
            ?. /*@target=Test3.prop*/ prop = getDouble();

    var /*@type=double?*/ v6 =
         t?.
                /*@target=Test3.prop2*/ /*@target=Test3.prop2*/ prop2
             ??= getDouble();

    var /*@type=double?*/ v7 =
         t
                ?. /*@target=Test3.prop*/ /*@target=Test3.prop*/ prop
            /*@target=double.+*/ += getInt();

    var /*@type=double?*/ v8 =
         t
                ?. /*@target=Test3.prop*/ /*@target=Test3.prop*/ prop
            /*@target=double.+*/ += getNum();

    var /*@type=double?*/ v9 =
         t?.
                /*@target=Test3.prop*/ /*@target=Test3.prop*/ prop
            /*@target=double.+*/ += getDouble();

    var /*@type=double?*/ v10 = /*@target=double.+*/ ++
         t
            ?. /*@target=Test3.prop*/ /*@target=Test3.prop*/ prop;

    var /*@type=double?*/ v11 =
         t
            ?. /*@target=Test3.prop*/ /*@target=Test3.prop*/ prop
        /*@target=double.+*/ ++;
  }
}

main() {}