/
adamantium.rb
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/
adamantium.rb
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# encoding: utf-8
require 'ice_nine'
require 'thread_safe'
# Allows objects to be made immutable
module Adamantium
# Storage for memoized methods
Memory = Class.new(ThreadSafe::Hash)
# Defaults to less strict defaults
module Flat
# Return flat freezer
#
# @return [Freezer::Flat]
#
# @api private
def freezer
Freezer::Flat
end
# Hook called when module is included
#
# @param [Class,Module] descendant
#
# @return [undefined]
#
# @api private
def self.included(descendant)
super
descendant.instance_exec(self) do |mod|
include Adamantium
extend mod
end
end
private_class_method :included
end # Flat
# Hook called when module is included
#
# @param [Module] descendant
# the module or class including Adamantium
#
# @return [self]
#
# @api private
def self.included(descendant)
descendant.class_eval do
extend ModuleMethods
extend ClassMethods if kind_of?(Class)
end
self
end
private_class_method :included
# Freeze the object
#
# @example
# object.freeze # object is now frozen
#
# @return [Object]
#
# @api public
def freeze
memory # initialize memory
super
end
# Get the memoized value for a method
#
# @example
# hash = object.memoized(:hash)
#
# @param [Symbol] name
# the method name
#
# @return [Object]
#
# @api public
def memoized(name)
memory[name]
end
# Sets a memoized value for a method
#
# @example
# object.memoize(:hash, 12345)
#
# @param [Symbol] name
# the method name
# @param [Object] value
# the value to memoize
#
# @return [self]
#
# @api public
def memoize(name, value)
unless memory.key?(name)
store_memory(name, freeze_object(value))
end
self
end
# A noop #dup for immutable objects
#
# @example
# object.dup # => self
#
# @return [self]
#
# @api public
def dup
self
end
private
# The memoized method results
#
# @return [Hash]
#
# @api private
def memory
@__memory ||= Memory.new
end
# Freeze object
#
# @param [Object] object
# an object to be frozen
#
# @return [Object]
#
# @api private
def freeze_object(object)
freezer.call(object)
end
# Return class level freezer
#
# @return [#call]
#
# @api private
def freezer
self.class.freezer
end
# Store the value in memory
#
# @param [Symbol] name
# the method name
# @param [Object] value
# the value to memoize
#
# @return [self]
#
# @return [value]
#
# @api private
def store_memory(name, value)
memory[name] = value
end
end # Adamantium
require 'adamantium/module_methods'
require 'adamantium/class_methods'
require 'adamantium/freezer'
require 'adamantium/mutable'
require 'adamantium/version'