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Contents
# frozen_string_literal: true
module DeepCover
bootstrap
# Memoize is a quick way to prepend a module that defines
# the memoized methods as `@_cache ||= super.freeze`
# It also refines `freeze` to precache memoized methods
#
module Memoize
def self.included(base)
base.extend ClassMethods
end
def freeze
self.class.memoized.each do |method|
send method
end
super
end
module ClassMethods
def memoized
@memoized ||= [].freeze
end
def memoizer_module
@memoizer_module ||= begin
mod = const_set(:Memoizer, Module.new)
prepend mod
mod
end
end
def memoize(*methods)
@memoized = (memoized | methods).freeze
methods.each do |method|
memoizer_module.module_eval <<-RUBY, __FILE__, __LINE__ + 1
def #{method} # def foo
@_#{method} ||= super.freeze # @_foo ||= super.freeze
end # end
RUBY
end
end
end
end
end
Version data entries
26 entries across 26 versions & 2 rubygems