tag.hpp
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1 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
22 #ifndef NDN_TAG_HPP
23 #define NDN_TAG_HPP
24 
25 namespace ndn {
26 
30 class Tag
31 {
32 public:
33  virtual
34  ~Tag();
35 
41 #ifdef DOXYGEN
42  static constexpr int
44  {
45  return <type-identifier>;
46  }
47 #endif // DOXYGEN
48 };
49 
50 inline
51 Tag::~Tag() = default;
52 
57 template<typename T, int TypeId>
58 class SimpleTag : public Tag
59 {
60 public:
61  static constexpr int
63  {
64  return TypeId;
65  }
66 
69  explicit
70  SimpleTag(const T& value)
71  : m_value(value)
72  {
73  }
74 
78  operator T() const
79  {
80  return m_value;
81  }
82 
85  const T&
86  get() const
87  {
88  return m_value;
89  }
90 
91 private:
92  T m_value;
93 };
94 
95 } // namespace ndn
96 
97 #endif // NDN_TAG_HPP
Copyright (c) 2013-2017 Regents of the University of California.
Definition: common.hpp:66
static constexpr int getTypeId()
Definition: tag.hpp:43
SimpleTag(const T &value)
explicitly convertible from T
Definition: tag.hpp:70
static constexpr int getTypeId()
Definition: tag.hpp:62
provides a tag type for simple types
Definition: tag.hpp:58
Base class for packet tags that can hold any arbitrary information.
Definition: tag.hpp:30
virtual ~Tag()