1  /*
 2   * Copyright (C) 2015 Apple Inc. All Rights Reserved.
 3   *
 4   * Redistribution and use in source and binary forms, with or without
 5   * modification, are permitted provided that the following conditions
 6   * are met:
 7   * 1. Redistributions of source code must retain the above copyright
 8   *    notice, this list of conditions and the following disclaimer.
 9   * 2. Redistributions in binary form must reproduce the above copyright
10   *    notice, this list of conditions and the following disclaimer in the
11   *    documentation and/or other materials provided with the distribution.
12   *
13   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
17   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
24   */
25  
26  #include "config.h"
27  #include "JSGlobalLexicalEnvironment.h"
28  
29  #include "JSCInlines.h"
30  
31  namespace JSC {
32  
33  const ClassInfo JSGlobalLexicalEnvironment::s_info = { "JSGlobalLexicalEnvironment", &Base::s_info, nullptr, nullptr, CREATE_METHOD_TABLE(JSGlobalLexicalEnvironment) };
34  
35  void JSGlobalLexicalEnvironment::destroy(JSCell* cell)
36  {
37      static_cast<JSGlobalLexicalEnvironment*>(cell)->JSGlobalLexicalEnvironment::~JSGlobalLexicalEnvironment();
38  }
39  
40  bool JSGlobalLexicalEnvironment::getOwnPropertySlot(JSObject* object, JSGlobalObject*, PropertyName propertyName, PropertySlot& slot)
41  {
42      JSGlobalLexicalEnvironment* thisObject = jsCast<JSGlobalLexicalEnvironment*>(object);
43      return symbolTableGet(thisObject, propertyName, slot);
44  }
45  
46  bool JSGlobalLexicalEnvironment::put(JSCell* cell, JSGlobalObject* globalObject, PropertyName propertyName, JSValue value, PutPropertySlot& slot)
47  {
48      JSGlobalLexicalEnvironment* thisObject = jsCast<JSGlobalLexicalEnvironment*>(cell);
49      ASSERT(!Heap::heap(value) || Heap::heap(value) == Heap::heap(thisObject));
50      bool alwaysThrowWhenAssigningToConstProperty = true;
51      bool ignoreConstAssignmentError = slot.isInitialization();
52      bool putResult = false;
53      symbolTablePutTouchWatchpointSet(thisObject, globalObject, propertyName, value, alwaysThrowWhenAssigningToConstProperty, ignoreConstAssignmentError, putResult);
54      return putResult;
55  }
56  
57  bool JSGlobalLexicalEnvironment::isConstVariable(UniquedStringImpl* impl)
58  {
59      SymbolTableEntry entry = symbolTable()->get(impl);
60      ASSERT(!entry.isNull());
61      return entry.isReadOnly();
62  }
63  
64  } // namespace JSC