Module: Stove::Mixin::Optionable::ClassMethods

Defined in:
lib/stove/mixins/optionable.rb

Instance Method Summary collapse

Instance Method Details

#option(name, initial = UNSET_VALUE) ⇒ Object

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



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# File 'lib/stove/mixins/optionable.rb', line 24

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