new luatex beta

new luatex beta

[Hans Hagen]

Hi,

The code has been checked in for the next luatex beta. The current MKIV 
beta is already prepared for that (primitive initializations and changed 
directlua support). Also, there are a few bug fixes (esp the vf 
positioning) that might result in better output. There are some pending 
issues with math but they might as well relate to issues with the lm fonts.

Anyway, we tested the beta a few days and it should work ok.

One new feature in MKIV is names lua runs. In the current version we no 
longer have multiple lua instances (we decided that it made no sense as 
no data can be shared). However, in MKIV we do have a few mildly 
isolated instances that are defined as follows:

\definenamedlua[user]    [private user instance]
\definenamedlua[third]   [third party module instance]
\definenamedlua[module]  [module instance]
\definenamedlua[isolated][isolated instance]

the names kind of reflect what their intended usage is. By default one 
has no access to global data unless prefixed by global, so for instance 
one can access the global character data as in (untested):

\startusercode
tex.sprint(global.characters.data[123].description)
\startusercode

(there is also \usercode{...})

This prevents that users mess up with the data unintended. However, 
there is still read and write access so be careful. I see no advantage 
in a more strict model than this.

Since each call to lua is reentrant, errors in your scripts will 
normally not result in a crash of \MKIV. The error message mentiones the 
second argument to the previous definitions.


Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
      tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : https://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________