Setting risky-local-variable

Setting risky-local-variable

[Juanma Barranquero]

What is the recommended way to set 'risky-local-variable for a Lisp
variable defined in C code?

  extern Qrisky_local_variable;
  Fput(Vmy_var, Qrisky_local_variable, Qt);

or an autoload

  ;;;###autoload (put 'my_var 'risky-local-variable t)

on a related lisp module?

-- 
                    /L/e/k/t/u

Re: Setting risky-local-variable

[Richard Stallman]

    What is the recommended way to set 'risky-local-variable for a Lisp
    variable defined in C code?

      extern Qrisky_local_variable;
      Fput(Vmy_var, Qrisky_local_variable, Qt);

    or an autoload

      ;;;###autoload (put 'my_var 'risky-local-variable t)

I think the former is cleaner, but the latter is also ok
if it is more convenient.

Also put a comment about this near where the C code defines the
variable.

Re: Setting risky-local-variable

[Juanma Barranquero]

On 5/27/05, Richard Stallman <rms@gnu.org> wrote:

> I think the former is cleaner, but the latter is also ok
> if it is more convenient.

I finally used the former, but I had to do:

  extern Lisp_Object Qrisky_local_variable;
  Fput (intern ("image-library-alist"), Qrisky_local_variable, Qt);

> Also put a comment about this near where the C code defines the
> variable.

A comment about what?

-- 
                    /L/e/k/t/u

Re: Setting risky-local-variable

[Richard Stallman]

    > Also put a comment about this near where the C code defines the
    > variable.

    A comment about what?

That statement refers to the other method where you would put on the
property in Lisp code.