gistfile1.rb

require 'ffi'

class FFI::Struct
  def method_missing(m=nil, *a)
    m ? self[m] : super(m, *a)
  end
  def self.array(size)
    klass = self
    Class.new(FFI::Struct){ layout :array, [klass, size]; def [](idx); super(:array)[idx]; end; }.new
  end
end


class Foo < FFI::Struct
  layout :baz, :uint, :bar, :uint
end

f = Foo.array(10)
p f[0].bar
p f[1].baz