# File lib/json/add/core.rb, line 97
 97:   def to_json(*args)
 98:     klass = self.class.name
 99:     klass.to_s.empty? and raise JSON::JSONError, "Only named structs are supported!"
100:     {
101:       'json_class' => klass,
102:       'v'     => values,
103:     }.to_json(*args)
104:   end