57 lines
1.0 KiB
C++
57 lines
1.0 KiB
C++
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#ifndef CMDOPTION
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#define CMDOPTION
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template <typename T>
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class CmdOption
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{
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public:
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typedef T value_type;
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CmdOption(const T& _val) : val_(_val), valid_(true) { }
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CmdOption() : valid_(false), enabled_(false) { }
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// has been set and has a value
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bool is_valid(void) const { return valid_; }
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bool has_value(void) const { return is_valid(); }
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// has been set and may have an value (check with is_valid())
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bool is_enabled() const { return enabled_; }
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void enable() { enabled_ = true; }
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CmdOption& operator = ( const T& _val )
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{
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val_ = _val;
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valid_=true;
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enable();
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return *this;
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}
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operator T () { return val_; }
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// operator const T& () const { return val_; }
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operator T* () { return is_valid() ? &val_ : NULL; }
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private:
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T val_;
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bool valid_;
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bool enabled_;
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private: // non-copyable
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CmdOption(const CmdOption&);
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CmdOption& operator = ( const CmdOption& );
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};
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template < typename T >
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std::ostream& operator << ( std::ostream& _os, CmdOption<T>& _opt )
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{
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_os << (T&)_opt;
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return _os;
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}
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#endif
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