pkg/front_end/testcases/inference/null_aware_method_invocation.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 C {
  int f() => throw '';
}

g(C? c) {
  var /*@type=int?*/ x = /*@type=C?*/ /*@promotedType=C*/ c
      ?. /*@target=C.f*/ f();
  /*@type=C?*/ /*@promotedType=C*/ c?. /*@target=C.f*/ f();
}

main() {}