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05ca544f15
Change-Id: Iaa0ca2b4f2d1b15f79ddca37834d3ed2497bc068 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/149242 Commit-Queue: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
41 lines
1 KiB
Dart
41 lines
1 KiB
Dart
// Copyright (c) 2013, 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 = 2.7
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import "package:expect/expect.dart";
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// Interpolation effect analysis test.
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get never => new DateTime.now().millisecondsSinceEpoch == 0;
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class A {
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int a = 0;
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toString() {
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++a;
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return 'A';
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}
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}
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// Many interpolations to make function too big to inline.
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// Summary for [fmt] must include effects from toString().
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fmt(x) => '$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x$x';
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test(a) {
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if (a == null) return;
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if (never) a.a += 1;
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var b = a.a; // field load
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var c = fmt(a); // field modified through implicit call to toString()
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var d = a.a; // field re-load
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Expect.equals('A 0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 30', '$a $b $c $d');
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// Extra use of [fmt] to prevent inlining on basis of single reference.
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Expect.equals('', fmt(''));
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}
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main() {
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test(null);
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test(new A());
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}
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