From: Gary Weaver <lists@...>
Date: 2012-09-27T04:50:16+09:00
Subject: Adding method on module class to yield and allow setting of attributes?

I have this Module:

module MyModule
  class << self
    attr_accessor :foo
    alias_method :foo?, :foo
  end
end

I can do:

MyModule.foo # nil
MyModule.foo = true
MyModule.foo # true

I would like to be able to do this:

MyModule.configure do
  foo = false
end

Such that MyModule.foo would then return false:

MyModule.foo # false

I'm a little tired so I'm probably making a mistake:

module MyModule
  class << self
    attr_accessor :foo
    alias_method :foo?, :foo
    # def configure(&block); yield; end # doesn't work
  end
end

# doesn't work either
#class << MyModule
#  def configure(&block); yield; end
#end

Thanks in advance for any advice. I'd rather not use any
Active*/Rails-specific method and don't want to use Struct, OpenStruct,
etc. I just want to be able to call the methods created by the
attr_accessor I used to set and get attributes. The reasons I'm doing
this to a module and not a class is it is convenient since it is the
module that my Gem's classes use.

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