class Regexp::Syntax::Base

def method_missing(name, *args)
  if self.class.respond_to?(name)
    warn 'Using instances of Regexp::Parser::Syntax is deprecated ' \
         "and will no longer be supported in v3.0.0. Please call "\
         "methods on the class directly, e.g.: #{self.class}.#{name}"
    self.class.send(name, *args)
  else
    super
  end
end