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Subject:
Re: expl3 boolean expressions: lazy evaluation
From:
Alexander Grahn <[log in to unmask]>
Reply To:
Mailing list for the LaTeX3 project <[log in to unmask]>
Date:
Fri, 17 Jul 2015 16:00:25 +0200
Content-Type:
text/plain
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Joseph,

On Fri, Jul 17, 2015 at 12:09:27PM +0100, Joseph Wright wrote:
>by
>
>    \bool_if:nTF
>      {
>        !\cs_if_exist:cTF {#1}
really an `!' in front?

>by
>
>    \bool_if:nT
>      {
>        ! \cs_if_exist:NTF \fxocg@insert@OC
same here.

>which could be redone as for the first case in media9. However,
>reviewing the code I realise that as you have \use:c here you'll
>actually get away with it (the second part will evaluate even if the
>csname is undefined). If you do want a 'safe' change then
>
>    \bool_if:nTF
>      {
>        ! \cs_if_exist:cTF { OCGpdfobj#3 }
same here.

Alexander

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