Robert Nystrom
a4b09ac192
Change-Id: I8b9b7d70abc47d672c68db65bc67d08beb7d41a7 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/142089 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Erik Ernst <eernst@google.com>
45 lines
1.5 KiB
Dart
45 lines
1.5 KiB
Dart
// Copyright (c) 2019, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// Tests syntax edge cases.
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import 'package:expect/expect.dart';
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void main() {
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// Trailing comma after then.
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Expect.listEquals([1], [if (true) 1,]);
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Expect.mapEquals({1: 1}, {if (true) 1: 1,});
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Expect.setEquals({1}, {if (true) 1,});
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// Trailing comma after else.
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Expect.listEquals([1], [if (true) 1 else 2,]);
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Expect.mapEquals({1: 1}, {if (true) 1: 1 else 2: 2,});
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Expect.setEquals({1}, {if (true) 1 else 2,});
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// Trailing comma after for.
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Expect.listEquals([1], [1, for (; false;) 2,]);
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Expect.mapEquals({1: 1}, {1: 1, for (; false;) 2: 2,});
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Expect.setEquals({1}, {1, for (; false;) 2,});
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// Dangling else.
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Expect.listEquals([1], [if (true) if (false) 0 else 1]);
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Expect.listEquals([1], [if (true) if (false) 0 else 1 else 2]);
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Expect.listEquals([2], [if (false) if (false) 0 else 1 else 2]);
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// Precedence of then.
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Expect.listEquals([1, 2, 3], [1, if (true) true ? 2 : 0, 3]);
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var a = 0;
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Expect.listEquals([1, 2, 3], [1, if (true) a = 2, 3]);
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// Precedence of else.
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Expect.listEquals([1, 2, 3], [1, if (false) 0 else true ? 2 : 0, 3]);
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a = 0;
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Expect.listEquals([1, 2, 3], [1, if (false) 0 else a = 2, 3]);
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// Precedence of for.
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Expect.listEquals([1, 2, 3],
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[1, for (var i = 0; i < 1; i++) true ? 2 : 0, 3]);
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a = 0;
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Expect.listEquals([1, 2, 3], [1, for (var i = 0; i < 1; i++) a = 2, 3]);
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}
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