[luatex] math list?

[Yannis Haralambous]

Hi,

I'm using

for t in node.traverse(h) do
     texio.write_nl(string.rep("...",prof) .. 'NODE type=' ..  node.type(t.id) .. ' subtype=' .. t.subtype )
end

in the pre_linebreak_filter to display all nodes in an hlist. This works well.

My question is: how to access math lists? When there is math in my document I get only one node, of type "math" (subtype 1),
I guess that behind that node there is an mlist, but how can I traverse it?

I found the mlist_to_hlist() method, but when I do

for x in node.traverse(node.mlist_to_hlist(t,"text",true)) do
     		texio.write_nl('in MATH list ' .. string.rep("...",prof) .. 'NODE type=' ..  node.type(x.id) .. ' subtype=' .. x.subtype )
     	end

I get the following error:

! This can't happen (mlist1).
l.14 
I'm broken. Please show this to someone who can fix can fix

And even if I manage to convert the mlist into a hlist to traverse it, the question is: how do I get back to the mlist? (since I want
to replace some glyphs by others).

thanks in advance for any help…

Yannis

-- 
-------------------------------------------------------
Yannis Haralambous
Directeur d'études
Institut Télécom, Télécom Bretagne
Département Informatique
UMR CNRS 3192 Lab-STICC
Technopôle Brest Iroise
CS 83818, 29238 Brest Cedex 3, France
Tel: +33 2 29 00 14 27
Fax: +33 2 29 00 12 82
Email: yannis.haralambous at telecom-bretagne.eu
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