I notice that the current auto-mode-alist entries all end with a single quote, for example
("\\.java\\'" . java-mode)
What is the purpose of the single quote. I would have expected to see
("\\.java$" . java-mode)
The reason I ask is that I am trying to get files with names matching regexp
^twiki\.corp.*
to open in org-mode. I have tried the following without success:
(add-to-list 'auto-mode-alist '("^twiki\\.corp" . org-mode))
(add-to-list 'auto-mode-alist '("\\'twiki\\.corp" . org-mode))
The following works:
(add-to-list 'auto-mode-alist '("twiki\\.corp" . org-mode))
but is not quite what I want since file names with twiki.corp embedded in them will be opened in org-mode.
\\' matches the empty string at the end of the string/buffer:
http://www.gnu.org/software/emacs/manual/html_node/emacs/Regexp-Backslash.html e l
$ will match the end of the line: If you have newlines in your filename (very uncommon) $ will match the newline and not the end of the string.
The regex is matched against the whole filename, so you need include "/" to match the directory seperator:
(add-to-list 'auto-mode-alist '("/twiki\\.corp" . org-mode))
来源：https://stackoverflow.com/questions/3494402/setting-auto-mode-alist-in-emacs