new

# File lib/irb/locale.rb, line 25
    def initialize(locale = nil)
      @lang = @territory = @encoding_name = @modifier = nil
      @locale = locale || ENV["IRB_LANG"] || ENV["LC_MESSAGES"] || ENV["LC_ALL"] || ENV["LANG"] || "C"
      if m = LOCALE_NAME_RE.match(@locale)
        @lang, @territory, @encoding_name, @modifier = m[:language], m[:territory], m[:codeset], m[:modifier]

        if @encoding_name
          begin load 'irb/encoding_aliases.rb'; rescue LoadError; end
          if @encoding = @@legacy_encoding_alias_map[@encoding_name]
            warn(("%s is obsolete. use %s" % ["#{@lang}_#{@territory}.#{@encoding_name}", "#{@lang}_#{@territory}.#{@encoding.name}"]), uplevel: 1)
          end
          @encoding = Encoding.find(@encoding_name) rescue nil
        end
      end
      @encoding ||= (Encoding.find('locale') rescue Encoding::ASCII_8BIT)
    end