Robert Nystrom
dbaf041ae4
Change-Id: Ia3238c1781422ec5eb7a219a5cf8af645a4c5876 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/409000 Commit-Queue: Bob Nystrom <rnystrom@google.com> Reviewed-by: Lasse Nielsen <lrn@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
58 lines
1.1 KiB
Dart
58 lines
1.1 KiB
Dart
// Copyright (c) 2023, 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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/// Variables declared by a pattern are in scope in the guard.
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import "package:expect/expect.dart";
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var a = 'outer';
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void main() {
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testSwitchStatement();
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testSwitchExpression();
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testIfCaseStatement();
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testIfCaseElement();
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}
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void testSwitchStatement() {
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switch ('value') {
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case var a when _guard(a):
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break;
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}
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_expectGuard('value');
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}
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void testSwitchExpression() {
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(switch ('value') {
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var a when _guard(a) => 'body',
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_ => 'other',
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});
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_expectGuard('value');
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}
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void testIfCaseStatement() {
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if ('value' case var a when _guard(a)) {}
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_expectGuard('value');
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}
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void testIfCaseElement() {
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var list = [if ('value' case var a when _guard(a)) 'element'];
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_expectGuard('value');
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}
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String _guardArg = '';
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bool _guard(String arg) {
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_guardArg = arg;
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return true;
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}
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void _expectGuard(String expected) {
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Expect.equals(expected, _guardArg);
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_guardArg = '';
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}
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