valid_const?

# File railties/lib/rails/generators/app_name.rb, line 37
        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