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# frozen_string_literal: true
# NilPerson class following the NullObject pattern.
# This class represents a null object for a person, providing default
# implementations that return nil or self as appropriate.
class NilPerson
# Returns the name of the NilPerson.
#
# @return [nil] Always returns nil.
def name
nil
end
# Returns the father of the NilPerson.
#
# @return [NilPerson] Always returns self.
def father
self
end
# Returns the mother of the NilPerson.
#
# @return [NilPerson] Always returns self.
def mother
self
end
# Returns the gender of the NilPerson.
#
# @return [nil] Always returns nil.
def gender
nil
end
# Checks equality with another object.
#
# @param other [Object] The object to compare with.
# @return [Boolean] True if the other object is a NilPerson, false otherwise.
def ==(other)
other.is_a?(NilPerson)
end
# Checks equality with another object (alias for ==).
#
# @param other [Object] The object to compare with.
# @return [Boolean] True if the other object is a NilPerson, false otherwise.
def eql?(other)
self == other
end
def to_s
''
end
end
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