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Message-ID:  <983de21c-d7a3-fb43-499b-28882cff33c7@gmail.com>
Date:         Thu, 27 Dec 2018 09:49:26 +0100
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From:         Bruno Le Floch <blflatex@GMAIL.COM>
Subject: Re: Problem with choosing argument specification
To:           LATEX-L@LISTSERV.UNI-HEIDELBERG.DE
In-Reply-To:  <9f825eb2-4d43-464c-c4e9-d29478b5da84@gmail.com>
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Status: R

On 12/27/18 09:26, Tisha Shusho wrote:
> Hello List,
> 
> Merry Christmas and a Happy New Year in advance.
> 
> I want to apply the function '\exp_args:Ncnn' to
> '\fontspec_set_family:Nnn <family-passed-as-list-of-strings> <feature>
> <font>'.
> Please note the family name is defined as a variable l__..._tl. The
> reason that
> I want to 'Ncnn' (I think) is that the argument specification of the
> function
> '\fontspec_set_family' is 'Nnn'.
> 
> However, there is no argument specification 'Ncnn' in the signature of
> '\exp_args'. Also as I understand from the LaTeX3 documents it is not
> possible to create such a variant for this function with
> '\cs_generate_variant:Nn'. Furthermore, as '\exp_args_generate:n' is
> defined in 'l3candidates' which is experimental, at the moment I have
> decided to use the following:
> 
> \exp_args:Ncnx \fontspec_set_family:Nnn
> <family-passed-as-list-of-strings> <feature> <font>'
> 
> Is it correct to use 'Ncnx' instead of 'Ncnn'? What is the best
> argument specification to use instead of 'Ncnx' here?
> 
> Thanks,
> Tisha

\exp_args:Nc