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CmdOption.hh
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35 /*===========================================================================*\
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38  * $Date: 2015-01-05 16:34:10 +0100 (Mo, 05 Jan 2015) $ *
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41 
42 #ifndef CMDOPTION
43 #define CMDOPTION
44 
45 template <typename T>
46 class CmdOption
47 {
48 public:
49 
50  typedef T value_type;
51 
52  CmdOption(const T& _val) : val_(_val), valid_(true), enabled_(false) { }
53  CmdOption() : val_(T()),valid_(false), enabled_(false) { }
54 
55  // has been set and has a value
56  bool is_valid(void) const { return valid_; }
57  bool has_value(void) const { return is_valid(); }
58 
59  // has been set and may have an value (check with is_valid())
60  bool is_enabled() const { return enabled_; }
61 
62  void enable() { enabled_ = true; }
63 
64  CmdOption& operator = ( const T& _val )
65  {
66  val_ = _val;
67  valid_=true;
68  enable();
69  return *this;
70  }
71 
72  operator T () const { return val_; }
73  // operator const T& () const { return val_; }
74 
75  operator T* () const { return is_valid() ? &val_ : NULL; }
76 
77 private:
78 
79  T val_;
80  bool valid_;
81  bool enabled_;
82 
83 private: // non-copyable
84 
85  CmdOption(const CmdOption&);
86  CmdOption& operator = ( const CmdOption& );
87 
88 };
89 
90 template < typename T >
91 std::ostream& operator << ( std::ostream& _os, CmdOption<T>& _opt )
92 {
93  _os << (T&)_opt;
94  return _os;
95 }
96 
97 #endif
Definition: CmdOption.hh:46

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