Sergey G. Grekhov
82b78916fd
Change-Id: If31c487e3ebe2c1ae847aff7c8994580b8b6f2f6 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/309660 Reviewed-by: Alexander Thomas <athom@google.com> Commit-Queue: Alexander Thomas <athom@google.com>
55 lines
1.1 KiB
Dart
55 lines
1.1 KiB
Dart
// Copyright (c) 2023, 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.
|
|
|
|
/// Variables declared by a pattern are in scope in the guard.
|
|
import "package:expect/expect.dart";
|
|
|
|
var a = 'outer';
|
|
|
|
void main() {
|
|
testSwitchStatement();
|
|
testSwitchExpression();
|
|
testIfCaseStatement();
|
|
testIfCaseElement();
|
|
}
|
|
|
|
void testSwitchStatement() {
|
|
switch ('value') {
|
|
case var a when _guard(a):
|
|
break;
|
|
}
|
|
|
|
_expectGuard('value');
|
|
}
|
|
|
|
void testSwitchExpression() {
|
|
(switch ('value') { var a when _guard(a) => 'body', _ => 'other' });
|
|
|
|
_expectGuard('value');
|
|
}
|
|
|
|
void testIfCaseStatement() {
|
|
if ('value' case var a when _guard(a)) {}
|
|
|
|
_expectGuard('value');
|
|
}
|
|
|
|
void testIfCaseElement() {
|
|
var list = [if ('value' case var a when _guard(a)) 'element'];
|
|
|
|
_expectGuard('value');
|
|
}
|
|
|
|
String _guardArg = '';
|
|
|
|
bool _guard(String arg) {
|
|
_guardArg = arg;
|
|
return true;
|
|
}
|
|
|
|
void _expectGuard(String expected) {
|
|
Expect.equals(expected, _guardArg);
|
|
_guardArg = '';
|
|
}
|