Chloe Stefantsova
414f318a05
The desugaring is presented as a series of nested if-statements interleaved with intermediate variable declarations that cache the results of accessing the members of the scrutinee object. Among other things, it prevents double access to a list element when checking the pattern conditions on it and then assigning it into a variable pattern. Part of https://github.com/dart-lang/sdk/issues/49749 Change-Id: I5bf0b040c44d150eacef9a727a8a66fd3a9a568d Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/270701 Commit-Queue: Chloe Stefantsova <cstefantsova@google.com> Reviewed-by: Johnni Winther <johnniwinther@google.com>
28 lines
730 B
Dart
28 lines
730 B
Dart
// Copyright (c) 2022, 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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// The test checks that the captured variables with the same name are note
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// placed into the same scope, which can be achieved, for example, by using new
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// blocks to adjust scoping.
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test(dynamic x1, dynamic x2) {
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if (x1 case var y) {}
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if (x1 case var y) {
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if (x2 case var y) {
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return y;
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}
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}
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throw "Expected to never reach this line of the program.";
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}
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main() {
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expectEquals(test(1, 2), 2);
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}
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expectEquals(x, y) {
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if (x != y) {
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throw "Expected ${x} and ${y} to be equal.";
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}
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}
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