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Contents
module Stove
module Mixin::Optionable
def self.included(base)
base.send(:extend, ClassMethods)
end
def self.extended(base)
base.send(:extend, ClassMethods)
end
module ClassMethods
#
# This is a magical method. It does three things:
#
# 1. Defines a class method getter and setter for the given option
# 2. Defines an instance method that delegates to the class method
# 3. (Optionally) sets the initial value
#
# @param [String, Symbol] name
# the name of the option
# @param [Object] initial
# the initial value to set (optional)
#
def option(name, initial = UNSET_VALUE)
define_singleton_method(name) do |value = UNSET_VALUE|
if value == UNSET_VALUE
instance_variable_get("@#{name}")
else
instance_variable_set("@#{name}", value)
end
end
define_method(name) { self.class.send(name) }
unless initial == UNSET_VALUE
send(name, initial)
end
end
end
end
end
Version data entries
30 entries across 30 versions & 3 rubygems