# frozen_string_literal: true
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
require 'json'
end
class Rational
# See #as_json.
def self.json_create(object)
Rational(object['n'], object['d'])
end
# Methods <tt>Rational#as_json</tt> and +Rational.json_create+ may be used
# to serialize and deserialize a \Rational object;
# see Marshal[rdoc-ref:Marshal].
#
# \Method <tt>Rational#as_json</tt> serializes +self+,
# returning a 2-element hash representing +self+:
#
# require 'json/add/rational'
# x = Rational(2, 3).as_json
# # => {"json_class"=>"Rational", "n"=>2, "d"=>3}
#
# \Method +JSON.create+ deserializes such a hash, returning a \Rational object:
#
# Rational.json_create(x)
# # => (2/3)
#
def as_json(*)
{
JSON.create_id => self.class.name,
'n' => numerator,
'd' => denominator,
}
end
# Returns a JSON string representing +self+:
#
# require 'json/add/rational'
# puts Rational(2, 3).to_json
#
# Output:
#
# {"json_class":"Rational","n":2,"d":3}
#
def to_json(*args)
as_json.to_json(*args)
end
end
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