blob: 1c99ca26e5f0ea77e5b9f233c2552c4b82bdfbe6 [file] [log] [blame]
// 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.
// part of "core_patch.dart";
class _Closure implements Function {
factory _Closure._uninstantiable() {
throw "Unreachable";
bool operator ==(Object other) native "Closure_equals";
int get hashCode {
_hash ??= _computeHash();
return _hash;
_Closure get call => this;
_Closure _clone() native "Closure_clone";
int _computeHash() native "Closure_computeHash";
// No instance fields should be declared before the following fields whose
// offsets must be identical in Dart and C++.
// The following fields are declared both in raw_object.h (for direct access
// from C++ code) and also here so that the offset-to-field map used by
// deferred objects is properly initialized.
// Caution: These fields are not Dart instances, but VM objects. Their Dart
// names do not need to match the C++ names, but they must be private.
var _instantiator_type_arguments;
var _function_type_arguments;
var _delayed_type_arguments;
var _function;
var _context;
// Note: _Closure objects are created by VM "magically", without invoking
// constructor. So, _Closure default constructor is never compiled and
// detection of default-initialized fields is not performed.
// As a consequence, VM incorrectly assumes that _hash field is not
// nullable and may incorrectly remove 'if (_hash == null)' in get:hashCode.
// This initializer makes _hash field nullable even without constructor
// compilation.
var _hash = null;