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// Copyright (c) 2013, 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.
// @dart = 2.7
import "package:expect/expect.dart";
// Interpolation effect analysis test.
get never => new DateTime.now().millisecondsSinceEpoch == 0;
class A {
int a = 0;
toString() {
++a;
return 'A';
}
}
// Many interpolations to make function too big to inline.
// Summary for [fmt] must include effects from toString().
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';
test(a) {
if (a == null) return;
if (never) a.a += 1;
var b = a.a; // field load
var c = fmt(a); // field modified through implicit call to toString()
var d = a.a; // field re-load
Expect.equals('A 0 AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA 30', '$a $b $c $d');
// Extra use of [fmt] to prevent inlining on basis of single reference.
Expect.equals('', fmt(''));
}
main() {
test(null);
test(new A());
}