class Struct

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/struct.rb, line 9
def self.json_create(object)
  new(*object['v'])
end

See as_json.

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/struct.rb, line 30
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

Methods Struct#as_json and Struct.json_create may be used to serialize and deserialize a Struct object; see Marshal.

Method Struct#as_json 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>

# File vendor/bundle/ruby/3.4.0/gems/json-2.10.2/lib/json/add/struct.rb, line 49
def to_json(*args)
  as_json.to_json(*args)
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}}