[luatex] Behavior of node lists.

[Hans Hagen]

On 11/9/2012 9:22 PM, Stephan Hennig wrote:

> That is,
>
>    node.insert_after(nil, N, x)
>
> is not a short-cut for inserting after N, but returns x as new head?

no, it returns n as head as well as x:

   head, current = node.insert_after(nil,current,x)

boils down to

   head    = current
   current = x

so:

   head, current = node.insert_after(head,current,x)

becomes:

   head    = head or current or x
   current = x

Hans

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