Re: [Texmacs-dev] New special env variable: path to self

[Henri Lesourd]

Lionel Elie Mamane wrote:

> On Thu, Nov 23, 2006 at 03:10:19PM +0100, Henri Lesourd wrote:
>
>  
>
> > Have a look at the attached .tm file, and tell me if you can
> > still trick it the way you did in the examples of your previous
> > mail (i.e., try to interactively change the parameter of
> > the two instances of the <self-path*|...> macros in the
> > document). I guess that as far as the <self-path|...> macro
> > is concerned, you can't trick it anymore, now ;-).
> >    
>
> It does have the disadvantage of variable capture, namely the "x" is
> hardcoded in the Scheme function. I tried to return:
>
> parm
> (list 'unquote parm)
> (list 'eval parm)
>
> instead, but this breaks interactive editing: e.g. typing '^' in math
> mode doesn't make a superscript anymore, but a '^' character. The best
> I could find is:
>
> (tm-define (my-scheme-macro parm perm)
>   (:type (tree -> tree))
>   (:secure #t)
>   (with path (tree->path parm)
>      (display* "\nparm(" path ")\n"))
>   `(arg ,perm))
>
> and call with:
>
>  <assign|self-path|<macro|x|<extern|my-scheme-macro|<quote-arg|x>|x>>>
>
>
> Do you have a better solution?
>
>  
To my knowledge, this doesn't work, it would require some
sharing the datastructures/communication for the environments
between Scheme and the TeXmacs macro expander.

This is currently not implemented at all, as far as I know.


Best, Henri