module DSLKit::DynamicScope

def dynamic_scope(&block)
  self.dynamic_scope_name ||= :variables
  scope_block(Context.new, dynamic_scope_name, &block)
end

def method_missing(id, *args)
  self.dynamic_scope_name ||= :variables
  if args.empty? and scope_reverse(dynamic_scope_name) { |c| c.key?(id) and return c[id] }
    super
  elsif args.size == 1 and id.to_s =~ /(.*?)=\Z/
    c = scope_top(dynamic_scope_name) or super
    c[$1] = args.first
  else
    super
  end
end