# frozen_string_literal: true
unless defined?(::JSON::JSON_LOADED) and ::JSON::JSON_LOADED
require 'json'
end
class Struct
# See #as_json.
def self.json_create(object)
new(*object['v'])
end
# Methods <tt>Struct#as_json</tt> and +Struct.json_create+ may be used
# to serialize and deserialize a \Struct object;
# see Marshal[rdoc-ref:Marshal].
#
# \Method <tt>Struct#as_json</tt> serializes +self+,
# returning a 2-element hash representing +self+:
#
# require 'json/add/struct'
# Customer = Struct.new('Customer', :name, :address, :zip)
# x = Struct::Customer.new.as_json
# # => {"json_class"=>"Struct::Customer", "v"=>[nil, nil, nil]}
#
# \Method +JSON.create+ deserializes such a hash, returning a \Struct object:
#
# Struct::Customer.json_create(x)
# # => #<struct Struct::Customer name=nil, address=nil, zip=nil>
#
def as_json(*)
klass = self.class.name
klass.to_s.empty? and raise JSON::JSONError, "Only named structs are supported!"
{
JSON.create_id => klass,
'v' => values,
}
end
# Returns a JSON string representing +self+:
#
# require 'json/add/struct'
# Customer = Struct.new('Customer', :name, :address, :zip)
# puts Struct::Customer.new.to_json
#
# Output:
#
# {"json_class":"Struct","t":{'name':'Rowdy',"age":null}}
#
def to_json(*args)
as_json.to_json(*args)
end
end
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