tests/language/identical_const_test.dart

// Copyright (c) 2014, 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.

import 'package:expect/expect.dart';

f() {}
const g = 1;

const identical_ff = identical(f, f);
const identical_fg = identical(f, g);
const identical_gf = identical(g, f);
const identical_gg = identical(g, g);

// Verify proper compile time computation of identical()
const a = const {
  identical_ff: 0, /// 01: static type warning
  identical_gg: 0, /// 02: static type warning
  true: 0 };

const b = const {
  identical_fg: 0, /// 03: static type warning
  identical_gf: 0, /// 04: static type warning
  false: 0 };

use(x) => x;

main() {
  use(a);
  use(b);

  // Verify proper run time computation of identical()
  Expect.isTrue(identical_ff); /// 05: ok
  Expect.isTrue(identical_gg); /// 06: ok
  Expect.isFalse(identical_fg); /// 07: ok
  Expect.isFalse(identical_gf); /// 08: ok
}