// 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;

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

    var /*@ type=num* */ v2 = /*@ type=Test1* */ /*@target=Test1::==*/ t
        ?. /*@target=Test1::prop*/ prop = getNum();

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

    var /*@ type=num* */ v5 = /*@target=Test1::==*/ t?.
            /*@target=Test1::prop*/ /*@target=Test1::prop*/ prop
        /*@ target=num::== */ ??= getNum();

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

    var /*@ type=num* */ v8 = /*@target=Test1::==*/ t?.
            /*@target=Test1::prop*/ /*@target=Test1::prop*/ prop
        /*@ target=num::+ */ += getNum();

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

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

class Test2 {
  num prop;

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

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

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

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

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

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

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

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

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

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

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

class Test3 {
  double prop;

  static void test3(Test3 t) {
    var /*@ type=num* */ v2 = /*@ type=Test3* */ /*@target=Test3::==*/ t
        ?. /*@target=Test3::prop*/ prop = getNum();

    var /*@ type=double* */ v3 = /*@ type=Test3* */ /*@target=Test3::==*/ t
        ?. /*@target=Test3::prop*/ prop = getDouble();

    var /*@ type=num* */ v5 = /*@target=Test3::==*/ t?.
            /*@target=Test3::prop*/ /*@target=Test3::prop*/ prop
        /*@ target=num::== */ ??= getNum();

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

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

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

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

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

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

main() {}