Declaring a variable safe

Declaring a variable safe

[Eli Zaretskii]

The way to specify that a variable is safe for certain categories of
values is by giving it a `safe-local-variable' property.  For example:

  (put 'foobar 'safe-local-variable 'booleanp)

But what is the recommended way of doing this with a variable that is
defined in the C sources?  One possibility is to put the above form
somewhere in a Lisp file that is preloaded, like simple.el.  Is there
a better way?

TIA

Re: Declaring a variable safe

[Glenn Morris]

Eli Zaretskii wrote:

>   (put 'foobar 'safe-local-variable 'booleanp)
>
> But what is the recommended way of doing this with a variable that is
> defined in the C sources?  One possibility is to put the above form
> somewhere in a Lisp file that is preloaded, like simple.el.

This is currently done ~ line 2770 of files.el.

Re: Declaring a variable safe

[Stefan Monnier]

> The way to specify that a variable is safe for certain categories of
> values is by giving it a `safe-local-variable' property.  For example:

>   (put 'foobar 'safe-local-variable 'booleanp)

> But what is the recommended way of doing this with a variable that is
> defined in the C sources?  One possibility is to put the above form
> somewhere in a Lisp file that is preloaded, like simple.el.  Is there
> a better way?

You can also call Fput in an equivalent way from C, but it's usually
a lot more convenient to do it from Elisp.  I guess we could even
retarget the cus-start.el to be used specifically for these kinds of
uses where we stash Elisp that conceptually is related to the C code,
but just happens to be a lot more convenient do in Elisp.


        Stefan

Re: Declaring a variable safe

[Eli Zaretskii]

> Cc: emacs-devel@gnu.org
> From: Glenn Morris <rgm@gnu.org>
> Date: Sun, 28 Mar 2010 14:16:15 -0400
> 
> Eli Zaretskii wrote:
> 
> >   (put 'foobar 'safe-local-variable 'booleanp)
> >
> > But what is the recommended way of doing this with a variable that is
> > defined in the C sources?  One possibility is to put the above form
> > somewhere in a Lisp file that is preloaded, like simple.el.
> 
> This is currently done ~ line 2770 of files.el.

Thanks, this is exactly what I was looking for.