/*
 * Copyright (c) 2019, 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.
 */
/**
 * @assertion To infer the type of element:
 * ...
 * If element is a mapEntry ek: ev:
 * ...
 * If P is Map<Pk, Pv> then the inferred key type of element is the inferred
 * type of ek in context Pk and the inferred value type of element is the
 * inferred type of ev in context Pv.
 *
 * @description Checks that if P is Map<Pk, Pv> then the inferred key type of
 * element is the inferred type of ek in context Pk and the inferred value type
 * of element is the inferred type of ev in context Pv.
 *
 * See Issue 43139 evaluation: With null safety, doing 1 + x in a double context
 * will figure out that the only way int + something is going to be a double is
 * if the something is a double, so it will give x a context type of double.
 * Then double x = 1 + 1; will convert the latter 1 to a double literal, and the
 * result becomes a double. So, there is not compile error here with nnbd, and
 * it's a compile error without nnbd.
 * @Issue 43139
 * @author sgrekhov@unipro.ru
 */
main() {
  Map<double, double> x1 = {1 + 1: 1.0};
  Map<double, double> x2 = {1.0: 1 + 1};
}