On 10/27/2017 4:41 PM, Javier Bezos wrote:
Is there a "canonical" way to insert a "dummy" node passing some
data to the list, so that it can be used when processing it?
I'm writing a new feature for babel, and while I've discarded
this approach (an attribute is clearly better), I'm still
wondering if there is a preferred method. I thought a user
whatsit was the solution, but if I've understood correctly,
it cannot be added by TeX (only by lua).
there are user nodes that you can inject
\def\dummynode#1{\directlua{
local n = node.new("whatsit",node.subtype("user_defined"))
n.type = 100
n.value = #1
node.write(n)
}}%
foo\dummynode{123}bar
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