Boost C++ Libraries

// In header: <boost/test/utils/named_params.hpp>

template<typename unique_id> 
struct typed_keyword<bool, unique_id, false> : public boost::nfp::keyword< unique_id, false >,
                       public boost::nfp::named_parameter< bool, unique_id, bool >
{
  // types
  typedef unique_id   id;       
  typedef unspecified nil_t;    
  typedef bool        data_type;
  typedef bool        ref_type; 

  // construct/copy/destruct
  typed_keyword();

  // public member functions
  named_parameter< bool, unique_id, bool > operator!() const;
  ref_type operator[](keyword< unique_id, true >) const;
  ref_type operator[](keyword< unique_id, false >) const;
  nil_t operator[](keyword< UnknownId, false >) const;
  bool has(keyword< unique_id, false >) const;
  bool has(keyword< UnknownId, false >) const;
  void erase(keyword< unique_id, false >) const;
  void erase(keyword< UnknownId, false >) const;
  void apply_to(Visitor &) const;
  named_parameter_combine< NP, named_parameter< bool, unique_id, bool > > 
  operator,(NP const &) const;
};