Generated front_end/testcases/inference test files from Analyzer tests.

pkg/front_end/testcases/inference/infer_assign_to_property_custom.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 A {
+  int operator +(other) => 1;
+  double operator -(other) => 2.0;
+}
+
+class B {
+  A a;
+}
+
+var /*@topType=dynamic*/ v_prefix_pp =
+    (++new B(). /*error:TOP_LEVEL_INSTANCE_GETTER*/ a);
+var /*@topType=dynamic*/ v_prefix_mm =
+    (--new B(). /*error:TOP_LEVEL_INSTANCE_GETTER*/ a);
+var /*@topType=dynamic*/ v_postfix_pp =
+    (new B(). /*error:TOP_LEVEL_INSTANCE_GETTER*/ a++);
+var /*@topType=dynamic*/ v_postfix_mm =
+    (new B(). /*error:TOP_LEVEL_INSTANCE_GETTER*/ a--);