Emacs 23和24或其他之间的差异

Question

my previous fine key binding for cscope on emacs 23:

(define-key global-map [(control ,)]  'cscope-pop-mark)

now got an error on emacs 24

Debugger entered--Lisp error: (invalid-read-syntax ")")
eval-buffer(#<buffer  *load*<3>> nil "/home/ted/.emacs.d/ted.el" nil t)  ; Reading at      buffer position 12743

I try to evaluate in in *scratch*, then the following error, but emacs 23 returned ok:

Debugger entered--Lisp error: (invalid-read-syntax ")")
  read(#<buffer *scratch*>)
  preceding-sexp()
  eval-last-sexp-1(t)
  eval-last-sexp(t)
  eval-print-last-sexp()
  call-interactively(eval-print-last-sexp nil nil)

Answer 1

So let's fill in the relevant part of the comment pointed at by tripleee:

Another cause of trouble is vector notation for key sequence notation: instead of [(control ,)] and [(control ')], you should write [(control ?,)] and [(control ?')], which will work in older Emacsen too.

Answer 2

它是[(control ,)]在Emacs 24中的无效语法。将其拼写为[(control \\,)] ，该错误将消失，含义不变，并且不会失去与旧版Emacsen的兼容性。