module Rails::Generators::AppName

def valid_const?
  if /^\d/.match?(app_const)
    raise Error, "Invalid application name #{original_app_name}. Please give a name which does not start with numbers."
  elsif RESERVED_NAMES.include?(original_app_name)
    raise Error, "Invalid application name #{original_app_name}. Please give a " \
                 "name which does not match one of the reserved rails " \
                 "words: #{RESERVED_NAMES.join(", ")}"
  elsif Object.const_defined?(app_const_base)
    raise Error, "Invalid application name #{original_app_name}, constant #{app_const_base} is already in use. Please choose another application name."
  end
end