module AWS::Core::LazyErrorClasses::ClassMethods

def const_missing(name)
  base_error_grammar = self::BASE_ERROR_GRAMMAR
  const_missing_mutex.synchronize do
    return if const_defined?(name)
    const_set(name,
              Class.new(self::Base) do
                include Errors::ModeledError
                # so that MyService::Errors::Foo::Bar will work
                const_set(:BASE_ERROR_GRAMMAR, base_error_grammar)
                include LazyErrorClasses
              end)
  end
end

def error_class(code)
  module_eval(code.gsub(".","::"))
end

def included(mod)
  raise NotImplementedError.new("#{self} lazy-generates error classes; "+
                                "therefore it is not suitable for "+
                                "inclusion in other modules")
end