mirror of
https://github.com/dart-lang/sdk
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c10e96ba2f
Change-Id: I9daeebde586a00169bdaf069c7dc2fdc5d3d97f2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/147160 Commit-Queue: Lasse R.H. Nielsen <lrn@google.com> Reviewed-by: Bob Nystrom <rnystrom@google.com>
62 lines
1.3 KiB
Dart
62 lines
1.3 KiB
Dart
// Copyright (c) 2016, 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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// Dart test for type checks involving the void type.
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import "package:expect/expect.dart";
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var _str = new StringBuffer();
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T run<T>(T f()) {
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_str.write("+");
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var t = f();
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_str.write("-");
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return t;
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}
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void writeV() {
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_str.write("V");
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}
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main() {
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{
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var x = run<dynamic>(writeV);
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, x);
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_str.clear();
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var y = run(writeV) as dynamic;
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, y);
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_str.clear();
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}
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// implicit cast
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{
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dynamic d = writeV;
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var x = run<dynamic>(d);
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, x);
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_str.clear();
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var y = run(d);
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, y);
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_str.clear();
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}
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// dynamic dispatch
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{
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dynamic d = run;
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var x = d<dynamic>(writeV);
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, x);
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_str.clear();
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var y = d(writeV);
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Expect.equals('+V-', _str.toString());
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Expect.equals(null, y);
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_str.clear();
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}
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}
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