Re: `make-local-variable' and `add-hook'

[Reiner Steib]

On Wed, Apr 02 2008, Sebastian P. Luque wrote:

> Is this the best way to give a buffer-local value to a variable inside a
> hook:
>
> ---<---------------cut here---------------start-------------->---
> (add-hook 'sql-interactive-mode-hook
>         (lambda ()
>           (setq sql-input-ring-file-name "~/.emacs.d/sql_history")
>           (set (make-local-variable 'truncate-lines) t)))

`truncate-lines' is already buffer-local:

,----[ <f1> v truncate-lines RET ]
| truncate-lines is a variable defined in `C source code'.
| Its value is nil
| 
| Automatically becomes buffer-local when set in any fashion.
`----

> ---<---------------cut here---------------end---------------->---
>
> ?  I'm a bit confused about the last paragraph in the docs:
>
> ,-----[ C-h f make-local-variable RET ]
[...]
> | Do not use `make-local-variable' to make a hook variable buffer-local.
> | Instead, use `add-hook' and specify t for the LOCAL argument.
> `-----

This paragraph would be relevant if you'd like to make
`sql-interactive-mode-hook' buffer-local.

Bye, Reiner.
-- 
       ,,,
      (o o)
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