dart-sdk/tests/lib/async/syncstar_mixed_iterators_test.dart
Alexander Markov 94c120a6ea [vm] Cleanup old async/async*/sync* implementation from kernel
This change removes kernel transformation which was used to
desugar async/async*/sync* functions in the old implementation of
async/async*/sync*.

The useful part of the transformation is retained in
pkg/vm/lib/transformations/for_in_lowering.dart.

TEST=ci

Issue: https://github.com/dart-lang/sdk/issues/48378
Change-Id: Ic70c1fb35162a31bcc22eac3a8f6488b61e945b4
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/249944
Reviewed-by: Slava Egorov <vegorov@google.com>
Reviewed-by: Johnni Winther <johnniwinther@google.com>
Reviewed-by: Martin Kustermann <kustermann@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
2022-07-11 18:12:41 +00:00

35 lines
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Dart

// Copyright (c) 2020, 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.
//
// Test that sync* correctly iterates through nested iterators of both
// the internal sync* iterable and generic Iterable types.
import "package:expect/expect.dart";
Iterable<int> outerSyncStar() sync* {
yield 1;
// internal sync* iterable:
yield* innerSyncStar();
yield 4;
// Generic Iterable<int>:
yield* [5, 6];
//
yield* emptySyncStar();
yield 7;
}
Iterable<int> innerSyncStar() sync* {
yield 2;
yield* [];
yield* [3];
}
Iterable<int> emptySyncStar() sync* {
yield* [];
}
main() {
Expect.listEquals([1, 2, 3, 4, 5, 6, 7], [...outerSyncStar()]);
}