[luatex] glue nodes
Taco Hoekwater
taco at elvenkind.com
Mon Dec 17 17:29:49 CET 2012
On 12/17/2012 04:32 PM, Herbert Voss wrote:
> Hi all,
>
> in the documentation I read:
>
>
> \subsubsection{glue_spec items}
> [...]
> \starttabulate[|lT|l|p|]
> [..]
> \NC writable \NC boolean \NC If this is true, you can't assign to
> this \type{glue_spec} because it is one of the
> preallocated special cases. New in 0.52\NC\NR
>
>
> Is this correct that "writable=_true_" refers to a preallocated node?
> From what I read it should be false??
Depends on what you mean by preallocated node. There are a few
glue_specs that are allocated by luatex's internal initialization,
for example the one that belongs to \z at skip:
0pt plus 0pt minus 0pt
these are the ones that have writable==false (because they are
shared between nodes and parameters, and changing the value
would change all of them).
Best wishes,
Taco
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