module Temple
  module HTML
    class SafeString < String
      def html_safe?; true end
      def html_safe;  self end
      def to_s;       self end
    end
  end
end

class Object
  def html_safe?; false end
end

class Numeric
  def html_safe?; true end
end

class String
  def html_safe
    Temple::HTML::SafeString.new(self)
  end
end