pkg/front_end/testcases/inference_new/infer_assign_to_index_this.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=inference*/
library test;

class Index {}

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;
}

class C extends B {}

T f<T>() => null;

class Test {
  B operator [](Index i) => null;
  void operator []=(Index i, B v) {}

  void test() {
    this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] = /*@ typeArgs=B* */ f();
    this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] ??= /*@ typeArgs=B* */ f();
    this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] += /*@ typeArgs=dynamic */ f();
    this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] *= /*@ typeArgs=dynamic */ f();
    this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] &= /*@ typeArgs=dynamic */ f();
    --this /*@target=Test::[]=*/ [/*@ typeArgs=dynamic */ f()];
    this /*@target=Test::[]=*/ [/*@ typeArgs=dynamic */ f()]--;
    var /*@ type=B* */ v1 = this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] = /*@ typeArgs=B* */ f();
    var /*@ type=B* */ v2 = this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] ??= /*@ typeArgs=B* */ f();
    var /*@ type=A* */ v3 = this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] += /*@ typeArgs=dynamic */ f();
    var /*@ type=B* */ v4 = this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] *= /*@ typeArgs=dynamic */ f();
    var /*@ type=C* */ v5 = this /*@target=Test::[]=*/ [
        /*@ typeArgs=dynamic */ f()] &= /*@ typeArgs=dynamic */ f();
    var /*@ type=B* */ v6 =
        --this /*@target=Test::[]=*/ [/*@ typeArgs=dynamic */ f()];
    var /*@ type=B* */ v7 =
        this /*@target=Test::[]=*/ [/*@ typeArgs=dynamic */ f()]--;
  }
}

main() {}