Here's a shorter example which hyphenates with cmr12 (in pdfTeX/XeTeX)
but not with the font copied from David's example: hyphenation is lost
when closing the hbox, as can be seen by adding the appropriate
\tracingonline=1\showboxbreadth=99 and \showlists just before the
closing brace.
I have no idea why hyphenation is lost, though. As far as I can tell,
in David's example hyphenation is lost once the text is broken into
line a first time when put into a \vbox, while with cmr12 hyphenation
is kept through further unboxings.
--
\ifx\XeTeXversion\undefined
\font\x=cmr12
\else
\font\x="[lmroman12-regular]:mapping=tex-text"
\fi
\x
\setbox0\hbox{XXXXXXXXXXXXX just a few normal words to fill up the line
up to my x x x zzzzzz\-zzzzz}
\unhbox0
\bye
On 10/8/15, Arthur Reutenauer <arthur.reutena...@normalesup.org> wrote:
> On Thu, Oct 08, 2015 at 01:01:37PM +0100, David Carlisle wrote:
>> Here is a plain tex example, not quite as minimal as I'd like but out
>> of time for now.
>>
>> This hyphenates with pdftex but not xetex
>
> Many thanks David, that's really helpful.
>
> Best,
>
> Arthur
>
>
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