mailing-list for TeXmacs Users

[Jeremy Henty <address@hidden>]

I would  like to add a  hook at the end  of all lists  to perform some
extra assignments.   (I need  this to write  a package  for continuing
lists from the number of a previous list, as discussed here recently.)
Unfortunately adding  anything from inside  the list macros  messes up
the typesetting.  I've attached an example.

Why does adding a hook that does nothing change the layout?  How can I
add the hook  without any side-effects?  I have  tried using merge but
so far  without success.  The wierd  thing is that adding  the hook at
the  end of  the list  in the  body of  the document  works.   I don't
understand why putting it in the macro gives different results.

This is  the only  thing preventing me  releasing a neat  little macro
package.  All help gratefully received!

Regards, 

Jeremy Henty 
<TeXmacs|1.0.7>

<style|generic>

<\body>
  <\hide-preamble>
    <assign|list-end|<macro|>>

    <assign|render-list-old|<value|render-list>>

    <assign|render-list|<\macro|body>
      <\render-list-old>
        <arg|body><list-end>
      </render-list-old>
    </macro>>
  </hide-preamble>

  <\enumerate>
    <item>

    <item>

    <item>
  </enumerate>
</body>

<\initial>
  <\collection>
    <associate|preamble|false>
  </collection>
</initial>