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# Extends any Class to include *json_creatable?* method.
# Classes in Ruby are first-class objects---each is an instance of class Class.
#
# Typically, you create a new class by using:
#
#     class Name
#      # some code describing the class behavior
#     end
#
# When a new class is created, an object of type Class is initialized and
# assigned to a global constant (Name in this case).
#
# When `Name.new` is called to create a new object, the #new method in Class is
# run by default. This can be demonstrated by overriding #new in Class:
#
#     class Class
#       alias old_new new
#       def new(*args)
#         print "Creating a new ", self.name, "\n"
#         old_new(*args)
#       end
#     end
#
#     class Name
#     end
#
#     n = Name.new
#
# *produces:*
#
#     Creating a new Name
#
# Classes, modules, and objects are interrelated. In the diagram that follows,
# the vertical arrows represent inheritance, and the parentheses metaclasses.
# All metaclasses are instances of the class `Class'.
#                              +---------+             +-...
#                              |         |             |
#              BasicObject-----|-->(BasicObject)-------|-...
#                  ^           |         ^             |
#                  |           |         |             |
#               Object---------|----->(Object)---------|-...
#                  ^           |         ^             |
#                  |           |         |             |
#                  +-------+   |         +--------+    |
#                  |       |   |         |        |    |
#                  |    Module-|---------|--->(Module)-|-...
#                  |       ^   |         |        ^    |
#                  |       |   |         |        |    |
#                  |     Class-|---------|---->(Class)-|-...
#                  |       ^   |         |        ^    |
#                  |       +---+         |        +----+
#                  |                     |
#     obj--->OtherClass---------->(OtherClass)-----------...
#
class Class < Module
  # Creates a new anonymous (unnamed) class with the given superclass (or Object
  # if no parameter is given). You can give a class a name by assigning the class
  # object to a constant.
  #
  # If a block is given, it is passed the class object, and the block is evaluated
  # in the context of this class like #class_eval.
  #
  #     fred = Class.new do
  #       def meth1
  #         "hello"
  #       end
  #       def meth2
  #         "bye"
  #       end
  #     end
  #
  #     a = fred.new     #=> #<#<Class:0x100381890>:0x100376b98>
  #     a.meth1          #=> "hello"
  #     a.meth2          #=> "bye"
  #
  # Assign the class to a constant (name starting uppercase) if you want to treat
  # it like a regular class.
  #
  def initialize: (?Class superclass) ?{ (Class newclass) -> void } -> void

  # Allocates space for a new object of *class*'s class and does not call
  # initialize on the new instance. The returned object must be an instance of
  # *class*.
  #
  #     klass = Class.new do
  #       def initialize(*args)
  #         @initialized = true
  #       end
  #
  #       def initialized?
  #         @initialized || false
  #       end
  #     end
  #
  #     klass.allocate.initialized? #=> false
  #
  def allocate: () -> untyped

  # Callback invoked whenever a subclass of the current class is created.
  #
  # Example:
  #
  #     class Foo
  #       def self.inherited(subclass)
  #         puts "New subclass: #{subclass}"
  #       end
  #     end
  #
  #     class Bar < Foo
  #     end
  #
  #     class Baz < Bar
  #     end
  #
  # *produces:*
  #
  #     New subclass: Bar
  #     New subclass: Baz
  #
  def inherited: (Class arg0) -> untyped

  # Calls #allocate to create a new object of *class*'s class, then invokes that
  # object's #initialize method, passing it *args*.  This is the method that ends
  # up getting called whenever an object is constructed using `.new`.
  #
  def new: () -> untyped

  # Returns the superclass of *class*, or `nil`.
  #
  #     File.superclass          #=> IO
  #     IO.superclass            #=> Object
  #     Object.superclass        #=> BasicObject
  #     class Foo; end
  #     class Bar < Foo; end
  #     Bar.superclass           #=> Foo
  #
  # Returns nil when the given class does not have a parent class:
  #
  #     BasicObject.superclass   #=> nil
  #
  # # arglists
  #     class.superclass -> a_super_class or nil
  #
  def `superclass`: () -> Class?
end

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