Ruby – 结构和命名参数继承

class Person < Struct.new(:name,:last_name)
end

class ReligiousPerson < Person(:religion)
end

class PoliticalPerson < Person(:political_affiliation)
end

### Main ###

person = Person.new('jackie','jack')
pious_person = ReligiousPerson.new('billy','bill','ZoroaStrianism')
political_person = PoliticalPerson.new('frankie','frank','Connecticut for LiebeRMAN')

您可以定义新的Structs,基于Person：

class Person < Struct.new(:name,:last_name)
end

class ReligiousPerson < Struct.new(*Person.members,:religion)  
end

class PoliticalPerson < Struct.new(*Person.members,:political_affiliation)
end

### Main ###

person = Person.new('jackie','jack')
p pious_person = ReligiousPerson.new('billy','ZoroaStrianism')
p political_person = PoliticalPerson.new('frankie','Connecticut for LiebeRMAN')

结果：

#<struct ReligiousPerson name="billy",last_name="bill",religion="ZoroaStrianism">
#<struct PoliticalPerson name="frankie",last_name="frank",political_affiliation="Connecticut for LiebeRMAN">

立即发布我的答案后,我有一个想法：

class Person < Struct.new(:name,:last_name)
  def self.derived_struct( *args )
    Struct.new(*self.members,*args)
  end
end

class ReligiousPerson < Person.derived_struct(:religion)  
end

class PoliticalPerson < Person.derived_struct(:political_affiliation)
end

### Main ###

person = Person.new('jackie','Connecticut for LiebeRMAN')

工作正常！

您还可以将#derived_struct添加到Struct：

class Struct
  def self.derived_struct( *args )
    Struct.new(*self.members,*args)
  end
end