Samir Jindel
5572df1458
Change-Id: I907e59a9df9407f924c0518a185d5b28ab46e381 Cq-Include-Trybots: luci.dart.try:vm-kernel-win-release-x64-try,vm-kernel-optcounter-threshold-linux-release-x64-try,vm-kernel-precomp-linux-debug-x64-try,vm-kernel-precomp-linux-release-simarm-try,vm-kernel-precomp-linux-release-simarm64-try,vm-kernel-precomp-linux-release-x64-try,vm-kernel-precomp-win-release-x64-try Reviewed-on: https://dart-review.googlesource.com/69971 Commit-Queue: Samir Jindel <sjindel@google.com> Reviewed-by: Alexander Markov <alexmarkov@google.com>
53 lines
1.8 KiB
Dart
53 lines
1.8 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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// part of "core_patch.dart";
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@pragma("vm:entry-point")
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class _Closure implements Function {
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bool operator ==(Object other) native "Closure_equals";
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int get hashCode {
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if (_hash == null) {
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_hash = _computeHash();
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}
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return _hash;
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}
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_Closure get call => this;
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_Closure _clone() native "Closure_clone";
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int _computeHash() native "Closure_computeHash";
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// No instance fields should be declared before the following fields whose
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// offsets must be identical in Dart and C++.
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// The following fields are declared both in raw_object.h (for direct access
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// from C++ code) and also here so that the offset-to-field map used by
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// deferred objects is properly initialized.
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// Caution: These fields are not Dart instances, but VM objects. Their Dart
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// names do not need to match the C++ names, but they must be private.
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@pragma("vm:entry-point")
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var _instantiator_type_arguments;
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@pragma("vm:entry-point")
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var _function_type_arguments;
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@pragma("vm:entry-point")
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var _delayed_type_arguments;
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@pragma("vm:entry-point")
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var _function;
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@pragma("vm:entry-point")
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var _context;
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// Note: _Closure objects are created by VM "magically", without invoking
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// constructor. So, _Closure default constructor is never compiled and
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// detection of default-initialized fields is not performed.
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// As a consequence, VM incorrectly assumes that _hash field is not
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// nullable and may incorrectly remove 'if (_hash == null)' in get:hashCode.
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// This initializer makes _hash field nullable even without constructor
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// compilation.
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@pragma("vm:entry-point")
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var _hash = null;
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}
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