在emacs中编辑.emacs.el时，我运行了Alt + X eval-buffer命令。我的操作系统是Windows。当我重新启动emacs时，它会显示以下警告：
警告（初始化）：加载`... /。emacs.el'时发生错误：
错误：用于Unicode转义的非十六进制数字
为确保正常运行，您应该调查并删除初始化文件中的错误原因。使用`--debug-init'选项启动Emacs以查看完整的错误回溯。
.emacs.el是：
;;Open all fine in one running instance
;;Ref:http://www.johndcook.com/blog/2010/07/28/miscellaneous-emacs-adventures/
;;(server-start)
;;TEST
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
`(ansi-color-names-vector ["#242424" "#e5786d" "#95e454" "#cae682" "#8ac6f2" "#333366" "#ccaa8f" "#f6f3e8"])
`(custom-enabled-themes (quote (wheatgrass))))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)
;;Set auto save backup location, failed with following warning
(setq backup-directory-alist
`((".*" . ,"D:\Unix-Tmp")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\Unix-Tmp" t)))
(require 'recentf)
(recentf-mode 1)
(setq inhibit-startup-screen t)
(put 'upcase-region 'disabled nil)
(put 'downcase-region 'disabled nil)
;;Aspell install failed
;;(setq-default ispell-program-name "C:/bin/Aspell/bin/aspell.exe")
;;(setq text-mode-hook '(lambda() (flyspell-mode t) ))
我怎么解决它？
问题是这些问题：
(setq backup-directory-alist
`((".*" . ,"D:\Unix-Tmp")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\Unix-Tmp" t)))
\U引入了unicode转义...并且必须跟随十六进制数字。
你实际上想要的是一个字面反斜杠字符，所以你需要逃避它;即
(setq backup-directory-alist
`((".*" . ,"D:\\Unix-Tmp")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\\Unix-Tmp" t)))
参考：http://www.gnu.org/software/emacs/manual/html_node/elisp/Basic-Char-Syntax.html#Basic-Char-Syntax
UPDATE
但是，这似乎会导致另一个问题。一个更好的解决方案是做@Stefan建议的。使用“/”代替“\”作为路径名分隔符。 （它应该在Windows上工作......）
始终在Emacs中使用正斜杠而不是反斜杠作为文件名。 Windows通常更喜欢反斜杠，但除了极少数例外，Windows实际上也接受正斜杠。
错误是由D：\ Unix-Tmp引起的，\ U引入了unicode转义，正如Stephen所说。
但是当我改为：
(setq backup-directory-alist
`((".*" . ,"D:\\Unix-Tmp")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\\Unix-Tmp" t)))
它会抛出另一个：
正在加载d：/git_root_tfs/WorkStation/Unix-Home/.recentf ... done清理recentf list ... done（0已移除）有关GNU Emacs和GNU系统的信息，请键入C-h C-a。 make-auto-save-file-name：替换文本中使用“\”无效
最后我将路径改为D：\ Tmp-Unix并且它有效。
(setq backup-directory-alist
`((".*" . ,"D:\Tmp-Unix")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\Tmp-Unix" t)))
总计.eamcs.el是
;;Open all fine in one running instance
;;Ref:http://www.johndcook.com/blog/2010/07/28/miscellaneous-emacs-adventures/
;;(server-start)
;;TEST
(custom-set-variables
;; custom-set-variables was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
`(ansi-color-names-vector ["#242424" "#e5786d" "#95e454" "#cae682" "#8ac6f2" "#333366" "#ccaa8f" "#f6f3e8"])
`(custom-enabled-themes (quote (wheatgrass))))
(custom-set-faces
;; custom-set-faces was added by Custom.
;; If you edit it by hand, you could mess it up, so be careful.
;; Your init file should contain only one such instance.
;; If there is more than one, they won't work right.
)
;;Set auto save backup location, failed with following warning
(setq backup-directory-alist
`((".*" . ,"D:\Tmp-Unix")))
(setq auto-save-file-name-transforms
`((".*" ,"D:\Tmp-Unix" t)))
(require 'recentf)
(recentf-mode 1)
(setq inhibit-startup-screen t)
(put 'upcase-region 'disabled nil)
(put 'downcase-region 'disabled nil)
;;Aspell install failed
;;(setq-default ispell-program-name "C:/bin/Aspell/bin/aspell.exe")
;;(setq text-mode-hook '(lambda() (flyspell-mode t) ))
Windows中的Emacs将正斜杠（/）视为反斜杠（\）。指定任何类型的路径时，应始终使用正斜杠。 Emacs将正确解释它们。这允许您将转义序列使用控制到预期效果的时间。
C:/Users/username/AppData/Roaming/.emacs是Emacs中完全有效的路径/文件名。