tests/language/const_nested_test.dart

// Copyright (c) 2012, 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";

// Test of compile time constant local variables in outer function levels.

const N = 8;

class ConstFoo {
  final x;
  const ConstFoo(this.x);
}

getClosure() {
  const MIN = 2 - 1;
  const MAX = N * 2;
  const MASK = (1 << (MAX - MIN + 1)) - 1; // 65535.

  void foo() {
    Expect.equals(1, MIN);
    Expect.equals(16, MAX);
    Expect.equals(65535, MASK);
    // Refer to compile time constant local variables in outer scope.
    const s = 'MIN = $MIN  MAX = $MAX  MASK = $MASK';
    Expect.isTrue(identical(s, 'MIN = $MIN  MAX = $MAX  MASK = $MASK'));
    Expect.equals("MIN = 1  MAX = 16  MASK = 65535", s);
    var cf1 = const ConstFoo(MASK);
    var cf2 = const ConstFoo(s);
    var cf3 = const ConstFoo('MIN = $MIN  MAX = $MAX  MASK = $MASK');
    Expect.isTrue(identical(cf2, cf3));
    Expect.isFalse(identical(cf2, cf1));
  }

  return foo;
}

main() {
  var f = getClosure();
  f();
}