show()

std::ostream & rbr::as_keyword< typed_keyword< ID, Type > >::show ( std::ostream &  os, V const &  v  ) const

inlineinherited

Stream insertion function.

Display a textual description of current keyword and bound value over an output stream.

If Keyword defines a display member variable, it will be used to perform this display. Otherwise, its value will be displayed along with either a user-defined identifier or its stringified typename.

Parameters

os	Output stream
v	Value bound to current keyword

Returns

The up-to-date output stream

Example:

#include <raberu/raberu.hpp>
 
// Defines a keyword type that only accept floating point value
struct price_keyword : rbr::as_keyword<price_keyword>
{
  using rbr::as_keyword<price_keyword>::operator=;
 
  std::ostream& display(std::ostream& os, auto const& v)
  {
    return os << "Price: " << v << '$';
  }
};
 
inline constexpr price_keyword price = {};