Hi Hans,

> (no patch nor example of usage attached)
*sigh*, attaching files is always hard :-)

Anyway, I've attached it now, together with an exapmle prettyprinter that uses
it.

I've also slightly changed the patch since my last message. Now,
begin_of_buffer and end_of_buffer are always called, even for single line
\type's. I found that I had to do all kinds of magic to make things work for
\type as well, so this seems cleaner. To be able to differentiate, the type of
buffer ('single', 'buffer' or 'file') and the name of the buffer/file gets
passed to begin/end_of_buffer, though my example prettyprinter does not use
these yet.

Before, \type directly called hooks.flush_line. I've added buffers.typesingle
to be called instead, which calls begin_of_line, flush_line and end_of_line.
To prevent confusing with \type, I've renamed buffers.type to
buffers.typebuffer.

Finally, I've added some comments to the hooks.* functions, to document when
they are called.


Is there any place where lua pretty printers are documented? The wiki seems to
say only "wait for lua", but not how to use them. If there isn't, I'll try to
put something useful on the wiki.

Gr.

Matthijs