| OpenMesh

CmdOption.hh
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41
42
43
44 #ifndef CMDOPTION
45 #define CMDOPTION
46
47 template <typename T>
48 class CmdOption
49 {
50 public:
51
52 typedef T value_type;
53
54 explicit CmdOption(const T& _val) : val_(_val), valid_(true), enabled_(false) { }
55 CmdOption() : val_(T()),valid_(false), enabled_(false) { }
56
57 // has been set and has a value
58 bool is_valid(void) const { return valid_; }
59 bool has_value(void) const { return is_valid(); }
60
61 // has been set and may have an value (check with is_valid())
62 bool is_enabled() const { return enabled_; }
63
64 void enable() { enabled_ = true; }
65
66 CmdOption& operator = ( const T& _val )
67 {
68 val_ = _val;
69 valid_=true;
70 enable();
71 return *this;
72 }
73
74 operator T () const { return val_; }
75 // operator const T& () const { return val_; }
76
77 operator T* () const { return is_valid() ? &val_ : nullptr; }
78
79 private:
80
81 T val_;
82 bool valid_;
83 bool enabled_;
84
85 private: // non-copyable
86
87 CmdOption(const CmdOption&);
88 CmdOption& operator = ( const CmdOption& );
89
90 };
91
92 template < typename T >
93 std::ostream& operator << ( std::ostream& _os, CmdOption<T>& _opt )
94 {
95 _os << (T&)_opt;
96 return _os;
97 }
98
99 #endif
CmdOption
Definition: CmdOption.hh:48