Maybe the fact that it is the first word and hence is not preceded by a glue?
> Le 25 mars 2021 à 12:10, Philip Taylor <p.tay...@hellenic-institute.uk> a
> écrit :
>
> Jonathan Kew wrote:
>
>> The output you're getting shows that the hyphenation is in fact happening as
>> expected. (To get a hyphen rather than a box, you need to set the font's
>> \hyphenchar appropriately.)
>
> So what am I missing in my code, Jonathan ? I have added a \hyphenchar,
> removed the pointless (and dysfunctional) \showhyphens), but still get no
> hyphenation —
>
> % !TeX Program=Ini-XeTeX
>
> \catcode `\ = 10
> \catcode `\ = 10
> \catcode `\{ = 1
> \catcode `\} = 2
> \catcode `\^ = 7
>
> \tracingonline = 1
> \tracinglostchars = 2
>
> \font \tenrm = "Amiri"
> \tenrm
> \hyphenchar \font = `\‐
>
> \lccode "200D = "200D
> \catcode "200D = 11
> \patterns {^^^^200d1^^^^200d}
>
> \hsize = 0 pt
> bla^^^^200d^^^^200dbla
>
> \end
>
> ->
>
>
>> This is XeTeX, Version 3.141592653-2.6-0.999993 (TeX Live 2021/W32TeX)
>> (INITEX)
>> restricted \write18 enabled.
>> entering extended mode
>> (./untitled-4.tex
>> Overfull \hbox (23.1pt too wide) in paragraph at lines 21--22
>> []\tenrm blabla
>>
>> \hbox(11.24+6.33998)x0.0 []
>>
>> [0] )
>> Output written on untitled-4.pdf (1 page).
>> SyncTeX written on untitled-4.synctex.gz.
>>
>> Transcript written on untitled-4.log.
>>
> --
> ** Phil.
>
<http://www.imt-atlantique.fr/> Yannis HARALAMBOUS
Professor
Computer Science Department
UMR CNRS 6285 Lab-STICC
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