ciNullObject.hpp revision 1472:c18cbe5936b8 
1/*
2 * Copyright (c) 1999, 2000, Oracle and/or its affiliates. All rights reserved.
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24
25// ciNullObject
26//
27// This class represents a null reference in the VM.
28class ciNullObject : public ciObject {
29  CI_PACKAGE_ACCESS
30
31private:
32  ciNullObject() : ciObject() {}
33
34  const char* type_string() { return "ciNullObject"; }
35
36  void print_impl(outputStream* st);
37
38public:
39  // Is this ciObject a Java Language Object?  That is,
40  // is the ciObject an instance or an array
41  bool is_java_object() { return true; }
42
43  // What kind of ciObject is this?
44  bool is_null_object() const { return true; }
45  bool is_classless() const   { return true; }
46
47  // Get the distinguished instance of this klass.
48  static ciNullObject* make();
49};
50