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Mailing list for the LaTeX3 project <[log in to unmask]>
Date:
Sun, 7 Jul 2013 22:33:37 +0200
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Mailing list for the LaTeX3 project <[log in to unmask]>
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Subject:
Re: Function renaming: \<thing>_case:nnn to \<thing>_case:nnF
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From:
Frank Mittelbach <[log in to unmask]>
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Am 07.07.2013 19:10, schrieb Marco Daniel:
> Hi,
>
>>
>> In fact one could think of also having
>>
>> \<thing>_case:nnTF
>>
>> where the T branch is selected if you have a match (in addition to
>> executing any match code from the "n" argument).
> This sounds more logical for me and I really like this idea. I think the
> true part is mostly a message instead of a function. However for me as a
> beginner it's more consistent in a expl3 manner. ;-)
>
> So after this small discuss I vote for the following:
>
> \<thing>_case:nn_p
> \<thing>_case:nnF
> \<thing>_case:nnT
> \<thing>_case:nnTF#

something  _p:... is only supported if the we deal with true predicates 
that do not have side effects and are expandable. In other words not 
everything that has a TF variant also exists as a predicate

cheers
frank

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