`safe-local-variable' updates for Common Lisp programmers

`safe-local-variable' updates for Common Lisp programmers

[Edward O'Connor]

Hi,

Andreas Fuchs recently pointed out[0] that Common Lisp files often have
a file-local variables section which specifies the package and syntax of
the code in the file. For example:

           -*- mode: lisp; package: cl-user; syntax: ansi -*-

Andreas does the following in his .emacs; perhaps these should be the
default (at least, for files in lisp-mode)?

,----
| (put 'package 'safe-local-variable 'symbolp)
| (put 'Package 'safe-local-variable 'symbolp)
| (put 'syntax 'safe-local-variable 'symbolp)
| (put 'Syntax 'safe-local-variable 'symbolp)
| (put 'Base 'safe-local-variable 'integerp)
| (put 'base 'safe-local-variable 'integerp)
`----


Ted

0. http://boinkor.net/archives/2006/11/three_useful_emacs_hacks_for_l.html

-- 
Edward O'Connor
hober0@gmail.com

Ense petit placidam sub libertate quietem.

Re: `safe-local-variable' updates for Common Lisp programmers

[Stefan Monnier]

> Andreas Fuchs recently pointed out[0] that Common Lisp files often have
> a file-local variables section which specifies the package and syntax of
> the code in the file. For example:

>            -*- mode: lisp; package: cl-user; syntax: ansi -*-

> Andreas does the following in his .emacs; perhaps these should be the
> default (at least, for files in lisp-mode)?

> ,----
> | (put 'package 'safe-local-variable 'symbolp)
> | (put 'Package 'safe-local-variable 'symbolp)
> | (put 'syntax 'safe-local-variable 'symbolp)
> | (put 'Syntax 'safe-local-variable 'symbolp)
> | (put 'Base 'safe-local-variable 'integerp)
> | (put 'base 'safe-local-variable 'integerp)
> `----

Why do people set those vars like you show?  I.e. which piece of code makes
use of that?


        Stefan

Re: `safe-local-variable' updates for Common Lisp programmers

[Richard Stallman]

If we do mark these variables as safe, we had better defvar them too,
so that people won't think it is ok to define them for some other
meaning.

Another idea is to define something meaning "ignore this variable",
which would mean "don't bind the variable and don't complain about it
either."

Re: `safe-local-variable' updates for Common Lisp programmers

[Johan Bockgård]

Richard Stallman <rms@gnu.org> writes:

> Another idea is to define something meaning "ignore this variable",
> which would mean "don't bind the variable and don't complain about
> it either."

Well...

 -- Variable: ignored-local-variables
     This variable holds a list of variables that should not be given
     local values by files.  Any value specified for one of these
     variables is completely ignored.

-- 
Johan Bockgård

Re: `safe-local-variable' updates for Common Lisp programmers

[Richard Stallman]

How about adding those to ignored-local-variables?

Re: `safe-local-variable' updates for Common Lisp programmers

[Stefan Monnier]

> How about adding those to ignored-local-variables?

Before we do that, could someone reply to my question:

What are those variable settings used for?
I.e. which program/package/thing makes use of them?

As long as we don't know that, it's impossible to know what's the
best solution.


        Stefan

Re: `safe-local-variable' updates for Common Lisp programmers

[Richard Stallman]

    > How about adding those to ignored-local-variables?

    Before we do that, could someone reply to my question:

    What are those variable settings used for?
    I.e. which program/package/thing makes use of them?

Why does it make a difference?  As long as the use isn't in Emacs, I
think the answer doesn't matter for us.

Re: `safe-local-variable' updates for Common Lisp programmers

[Stefan Monnier]

>> How about adding those to ignored-local-variables?
>     Before we do that, could someone reply to my question:

>     What are those variable settings used for?
>     I.e. which program/package/thing makes use of them?

> Why does it make a difference?  As long as the use isn't in Emacs, I
> think the answer doesn't matter for us.

We don't even know if the use is in Emacs or not.

And if the OP can't be bothered to answer my question, I don't see why we
should go through the trouble to try and solve what he claims to be
a problem (do we even know it's a real problem, and not a pilot error?).


        Stefan

Re: `safe-local-variable' updates for Common Lisp programmers

[Johan Bockgård]

Stefan Monnier <monnier@iro.umontreal.ca> writes:

> What are those variable settings used for?
> I.e. which program/package/thing makes use of them?

Zmacs

http://groups.google.com/group/comp.lang.lisp/msg/52772f9112d303ad

http://groups.google.com/group/comp.lang.lisp/msg/42d31490dae262fb

-- 
Johan Bockgård