如何在Emacs中使用全局默认值在缓冲区中使变量成为本地变量

Question

In .emacs I have variable defined as:

(setq-default prevent-highlight-symbol-mode nil)

I use it to disable red tabs:

(add-hook 'font-lock-mode-hook
          (lambda()
            (if (and (null (memql major-mode highlight-chars-disable))
                     (not prevent-highlight-symbol-mode))
                 (hc-highlight-tabs))))

and use it in project-specifics macro

(project-specifics "projects/some-project"
  (setq prevent-highlight-symbol-mode t)
  (setq indent-tabs-mode t))

but when I open a file in some-project directory and I check for prevent-highlight-symbol-mode in any buffer I've got t not nil , it's set globaly. How can I make that variable local in a buffer?

Answer 1

make-local-variable makes a variable have a local binding in the current buffer.

make-variable-buffer-local makes a variable have a local binding in all buffers (even future ones).

If you have done (make-local-variable 'A-VAR) in the current buffer then (setq A-VAR A-VALUE) sets the local value. You can also do it using just (set (make-local-variable 'A-VAR) A-VALUE) .